10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2013

or

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission File No. 001-35938

GLOBAL BRASS AND COPPER HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Delaware	06-1826563
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification Number)

475 N. Martingale Road Suite 1050
Schaumburg, IL	60173
(Address of principal executive offices)	(Zip Code)

(847) 240-4700

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ¨    No  x

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	¨	Accelerated filer	¨
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

On August 9, 2013, there were 21,110,000 shares of common stock outstanding.

Global Brass and Copper Holdings, Inc.

Index

June 30, 2013

Table of Contents

PART I—FINANCIAL INFORMATION
Item 1. Financial Statements
Unaudited Consolidated Balance Sheets as of June 30, 2013 and December 31, 2012	1
Unaudited Consolidated Statements of Operations for the Three and Six Months Ended June  30, 2013 and 2012	2
Unaudited Consolidated Statements of Comprehensive Loss for the Three and Six Months Ended June  30, 2013 and 2012	3
Unaudited Consolidated Statements of Changes in (Deficit) / Equity for the Six Months Ended June  30, 2013 and 2012	4
Unaudited Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2013 and 2012	5
Notes to Unaudited Consolidated Financial Statements	6
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	40
Item 3. Quantitative and Qualitative Disclosures About Market Risk	68
Item 4. Controls and Procedures	69
PART II—OTHER INFORMATION
Item 1. Legal Proceedings	70
Item 1A. Risk Factors	70
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	71
Item 3. Defaults Upon Senior Securities	71
Item 4. Mine Safety Disclosures	71
Item 5. Other Information	71
Item 6. Exhibits	72
SIGNATURE	73

i

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

Global Brass and Copper Holdings, Inc.

Consolidated Balance Sheets (Unaudited)

	As of
(In thousands, except share and par value data)	June 30, 2013			December 31, 2012
Assets
Current assets:
Cash	$	34,010		$	13,862
Accounts receivable (net of allowance of $1,328 and $1,408 as of June 30, 2013 and December 31, 2012, respectively)		203,340			164,317
Inventories		199,549			174,378
Prepaid expenses and other current assets		25,092			12,141
Deferred income taxes		31,760			33,465
Income tax receivable, net		2,147			1,300
Total current assets		495,898			399,463
Property, plant and equipment, net		75,330			71,127
Investment in joint venture		2,168			2,972
Goodwill		4,399			4,399
Intangible assets, net		787			839
Deferred income taxes		6,826			6,138
Other noncurrent assets		16,794			17,755
Total assets	$	602,202		$	502,693
Liabilities and deficit
Current liabilities:
Accounts payable	$	106,981		$	81,577
Accrued liabilities		52,685			48,424
Accrued interest		3,395			3,287
Income tax payable		334			248
Total current liabilities		163,395			133,536
Long-term debt		431,000			389,522
Other noncurrent liabilities		27,678			27,436
Total liabilities		622,073			550,494
Commitments and contingencies (Note 13)		—			—
Global Brass and Copper Holdings, Inc. stockholders’ deficit:
Common stock—$.01 par value; 80,000,000 shares authorized; 21,110,000 shares issued and outstanding as of June 30, 2013 and December 31, 2012		211			211
Additional paid-in capital		29,452			—
Accumulated deficit		(53,897	)		(48,153	)
Accumulated other comprehensive income		587			1,466
Receivable from stockholder		—			(4,875	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit		(23,647	)		(51,351	)
Noncontrolling interest		3,776			3,550
Total deficit		(19,871	)		(47,801	)
Total liabilities and deficit	$	602,202		$	502,693

The accompanying notes are an integral part of these consolidated financial statements.

1

Global Brass and Copper Holdings, Inc.

Consolidated Statements of Operations (Unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
(In thousands, except share and per share data)	2013			2012			2013			2012
Net sales	$	461,478		$	416,979		$	906,440		$	860,370
Cost of sales		409,778			369,858			807,824			763,295
Gross profit		51,700			47,121			98,616			97,075
Selling, general and administrative expenses (including non-cash profits interest expense of $29,271, $19,517, $29,271 and $19,517, respectively)		52,855			37,965			72,533			55,888
Operating (loss) income		(1,155	)		9,156			26,083			41,187
Interest expense		9,959			10,209			19,834			19,958
Loss on extinguishment of debt		—			19,612			—			19,612
Other expense, net		4			398			191			709
(Loss) income before provision for (benefit from)income taxes and equity income		(11,118	)		(21,063	)		6,058			908
Provision for (benefit from) income taxes		6,461			(971	)		12,503			7,227
Loss before equity income		(17,579	)		(20,092	)		(6,445	)		(6,319	)
Equity income, net of tax		508			201			860			475
Net loss		(17,071	)		(19,891	)		(5,585	)		(5,844	)
Less: Net income attributable to noncontrolling interest		61			114			159			168
Net loss attributable to
Global Brass and Copper Holdings, Inc.	$	(17,132	)	$	(20,005	)	$	(5,744	)	$	(6,012	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)
Diluted	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)
Weighted average common shares outstanding:
Basic		21,110,000			21,110,000			21,110,000			21,110,000
Diluted		21,110,000			21,110,000			21,110,000			21,110,000

The accompanying notes are an integral part of these consolidated financial statements.

2

Global Brass and Copper Holdings, Inc.

Consolidated Statements of Comprehensive Loss (Unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
(In thousands)	2013			2012			2013			2012
Net loss	$	(17,071	)	$	(19,891	)	$	(5,585	)	$	(5,844	)
Other comprehensive loss :
Foreign currency translation adjustment		(753	)		(221	)		(1,395	)		(198	)
Less: Income tax benefit on other comprehensive loss		(313	)		(78	)		(583	)		(75	)
Comprehensive loss		(17,511	)		(20,034	)		(6,397	)		(5,967	)
Less: Comprehensive income attributable to noncontrolling interest		110			119			226			190
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.	$	(17,621	)	$	(20,153	)	$	(6,623	)	$	(6,157	)

The accompanying notes are an integral part of these consolidated financial statements.

3

Global Brass and Copper Holdings, Inc.

Consolidated Statements of Changes in (Deficit) / Equity (Unaudited)

(In thousands)	Common stock		Additional paid-in capital			(Accumulated deficit) / Retained earnings			Accumulated other comprehensive income			Receivable from stockholder			Total Global Brass and Copper Holdings, Inc. stockholders’ (deficit) /equity			Noncontrolling interest		Total (deficit) / equity
Balance at December 31, 2011	$	211	$	11,091		$	68,718		$	1,923		$	(2,451	)		79,492		$	3,168	$	82,660
Profits interest compensation		—		19,517			—			—			—			19,517			—		19,517
Distribution to stockholder		—		(30,608	)		(129,392	)		—			—			(160,000	)		—		(160,000	)
Amounts due from stockholder		—		—			—			—			(2,161	)		(2,161	)		—		(2,161	)
Net (loss) income		—		—			(6,012	)		—			—			(6,012	)		168		(5,844	)
Other comprehensive (loss) income, net of tax		—		—			—			(145	)		—			(145	)		22		(123	)
Balance at June 30, 2012	$	211	$	—		$	(66,686	)	$	1,778		$	(4,612	)	$	(69,309	)	$	3,358	$	(65,951	)
(In thousands)	Common stock		Additional paid-in capital			Accumulated deficit			Accumulated other comprehensive income			Receivable from stockholder			Total Global Brass and Copper Holdings, Inc. stockholders’ deficit			Noncontrolling interest		Total deficit
Balance at December 31, 2012	$	211	$	—		$	(48,153	)	$	1,466		$	(4,875	)	$	(51,351	)	$	3,550	$	(47,801	)
Profits interest compensation		—		29,271			—			—			—			29,271			—		29,271
Share-based compensation		—		181			—			—			—			181			—		181
Payment from stockholder		—		—			—			—			4,875			4,875			—		4,875
Net (loss) income		—		—			(5,744	)		—			—			(5,744	)		159		(5,585	)
Other comprehensive (loss) income, net of tax		—		—			—			(879	)		—			(879	)		67		(812	)
Balance at June 30, 2013	$	211	$	29,452		$	(53,897	)	$	587		$	—		$	(23,647	)	$	3,776	$	(19,871	)

The accompanying notes are an integral part of these consolidated financial statements.

4

Global Brass and Copper Holdings, Inc.

Consolidated Statements of Cash Flows (Unaudited)

	Six Months Ended June 30,
(In thousands)	2013			2012
Cash flows from operating activities
Net loss	$	(5,585	)	$	(5,844	)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Lower of cost or market adjustment to inventory		318			—
Mark to market on commodity contracts		62			(1,204	)
Mark to market on interest rate cap agreements		1			146
Depreciation		3,929			3,145
Amortization of intangible assets		52			60
Amortization of debt discount and issuance costs		1,230			3,368
Loss on extinguishment of debt		—			19,612
Profits interest compensation expense		29,271			19,517
Share-based compensation expense		181			—
Provision for bad debts, net of reductions		(104	)		172
Deferred income taxes		1,528			(575	)
Loss on sale of property, plant and equipment		9			3
Equity income, net of tax		(860	)		(475	)
Distributions from equity method investment		—			500
Change in assets and liabilities:
Accounts receivable		(38,726	)		(31,680	)
Inventories		(25,421	)		6,065
Prepaid expenses and other current assets		(13,038	)		5,395
Accounts payable		25,569			26,688
Accrued liabilities		4,274			(7,016	)
Accrued interest		108			(721	)
Income taxes, net		(768	)		225
Other, net		42			(7,044	)
Net cash (used in) provided by operating activities		(17,928	)		30,337
Cash flows from investing activities
Capital expenditures		(8,305	)		(7,222	)
Proceeds from sale of property, plant and equipment		169			6
Net cash used in investing activities		(8,136	)		(7,216	)
Cash flows from financing activities
Deferred financing fees		—			(12,926	)
Proceeds from senior secured notes		—			375,000
Payments on term loan		—			(310,875	)
Borrowings on ABL Facility		229,787			81,586
Payments on ABL Facility		(188,309	)		(30,913	)
Distribution to stockholder		—			(160,000	)
Net payment (amounts due) from stockholder		4,875			(2,161	)
Net cash provided by (used in) financing activities		46,353			(60,289	)
Effect of foreign currency exchange rates		(141	)		(207	)
Net increase (decrease) in cash		20,148			(37,375	)
Cash at beginning of period		13,862			49,537
Cash at end of period	$	34,010		$	12,162

The accompanying notes are an integral part of these consolidated financial statements.

5

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

1. Basis of Presentation and Principles of Consolidation

Global Brass and Copper Holdings, Inc. (“Holdings” or the “Company”) was incorporated in Delaware, on October 10, 2007. Holdings, through its wholly-owned principal operating subsidiary, Global Brass and Copper, Inc. (“GBC”), commenced commercial operations on November 19, 2007 through the acquisition of the metals business from Olin Corporation. GBC is a leading, value-added converter, fabricator, distributor and processor of specialized copper and brass products in North America. On May 29, 2013, the Company completed its initial public offering of 8,050,000 shares of its common stock (the “initial public offering” or “IPO”). The shares began trading on the New York Stock Exchange on May 23, 2013 under the ticker symbol “BRSS”. Halkos Holdings, LLC (“Halkos”), the sole stockholder of the Company prior to the IPO, sold all of the shares in the initial public offering and received all of the net proceeds from the offering. After giving effect to the IPO, Halkos beneficially owns approximately 61.5% of the outstanding common stock of the Company. KPS Capital Partners, L.P. and its affiliates (“KPS”) are the majority shareholders of Halkos.

The Company is operated and managed through three distinct divisions which are also the Company’s reportable segments: Olin Brass, Chase Brass (“Chase”) and A.J. Oster (“Oster”).

These consolidated financial statements include the accounts of the Company, its wholly-owned subsidiaries and its majority-owned subsidiaries in which the Company has a controlling interest. All significant intercompany accounts and transactions relative to wholly- and majority-owned subsidiaries have been eliminated. The equity method is used to account for investments in affiliated companies, 20% to 50% owned where the Company does not hold a controlling voting interest and does not direct the matters that most significantly impact the investee’s operations.

The accompanying unaudited interim financial statements include all normal recurring adjustments which are, in the opinion of management, necessary to a fair statement of the results for the interim periods presented. The December 31, 2012 consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. In addition, it requires management to make estimates and assumptions that affect the reported amount of net sales and expenses during the reporting period. Actual amounts could differ from those estimates.

Results of operations for the interim periods presented are not necessarily indicative of results which may be expected for any other interim period or for the year as a whole. There have been no significant changes to the Company’s significant accounting policies during the six months ended June 30, 2013. These interim financial statements should be read in conjunction with the December 31, 2012 consolidated financial statements of the Company, which were included in our Amendment No. 9 to Form S-1 Registration Statement filed with the Securities and Exchange Commission on May 22, 2013.

6

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

Revision of Prior Period Financial Statements

During 2012, the Company identified immaterial errors in previously issued consolidated financial statements related to the three and six months ended June 30, 2012, which were corrected in the period identified, including:

1. An error in the accounting for raw material in-transit was identified in the third quarter of 2012. Inventory was overstated by $811 as of June 30, 2012. Cost of sales was overstated by $50 and understated by $388 for the three and six months ended June 30, 2012, respectively.

2. Duplicate accruals for the receipt of raw material were identified in the third quarter of 2012. Accounts payable was overstated by $1,396 as of June 30, 2012. Cost of sales was overstated by $1,007 for the three and six months ended June 30, 2012.

3. An error in the accounting for workers’ compensation insurance related to the first quarter of 2012 was identified and originally corrected in the second quarter of fiscal 2012. Cost of sales was overstated by $298 for the three months ended June 30, 2012.

4. An error in the accounting for insurance receivables for workers’ compensation was identified and originally corrected in the fourth quarter of 2012. Accounts receivable and accrued liabilities were understated by $984.

The Company assessed the materiality of all errors, individually and in the aggregate, on previously issued consolidated financial statements and concluded that the errors were not material to any of the Company’s previously issued financial statements.

7

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

A summary of the revisions to the consolidated financial statements as of June 30, 2012 and for the three and six months ended June 30, 2012 is as follows:

	As Previously Reported			Adjustment			As Revised
	June 30, 2012
Consolidated Balance Sheet
Accounts receivable, net of allowance	$	192,326		$	984		$	193,310
Inventories		180,815			(811	)		180,004
Deferred income tax assets—current		28,079			1,264			29,343
Income tax receivable		4,996			(476	)		4,520
Total current assets		429,443			961			430,404
Deferred income tax assets—noncurrent		19,917			(260	)		19,657
Total assets		538,522			701			539,223
Accounts payable		105,981			(1,396	)		104,585
Accrued liabilities		39,590			984			40,574
Total current liabilities		148,919			(412	)		148,507
Total liabilities		605,586			(412	)		605,174
Accumulated deficit		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit		(70,422	)		1,113			(69,309	)
Total deficit		(67,064	)		1,113			(65,951	)
Total liabilities and deficit		538,522			701			539,223
	Three Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	371,213		$	(1,355	)	$	369,858
Gross profit		45,766			1,355			47,121
Operating income		7,801			1,355			9,156
Loss before benefit from income taxes and equity income		(22,418	)		1,355			(21,063	)
Benefit from income taxes		(1,247	)		276			(971	)
Loss before equity income		(21,171	)		1,079			(20,092	)
Net loss		(20,970	)		1,079			(19,891	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(21,084	)		1,079			(20,005	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(1.00	)	$	0.05		$	(0.95	)

8

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	As Previously Reported			Adjustment			As Revised
	Six Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	763,914		$	(619	)	$	763,295
Gross profit		96,456			619			97,075
Operating income		40,568			619			41,187
Income before provision for income taxes and equity income		289			619			908
Provision for income taxes		7,221			6			7,227
Loss before equity income		(6,932	)		613			(6,319	)
Net loss		(6,457	)		613			(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.31	)	$	0.03		$	(0.28	)
	Three Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(20,970	)	$	1,079		$	(19,891	)
Comprehensive loss		(21,113	)		1,079			(20,034	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(21,232	)		1,079			(20,153	)
	Six Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(6,457	)	$	613		$	(5,844	)
Comprehensive loss		(6,580	)		613			(5,967	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(6,770	)		613			(6,157	)
	Six Months Ended June 30, 2012
Consolidated Statement of Changes in Deficit
Net loss	$	(6,457	)	$	613		$	(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Accumulated deficit—Balance, June 30, 2012		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit—Balance, June 30, 2012		(70,422	)		1,113			(69,309	)
Total deficit—Balance, June 30, 2012		(67,064	)		1,113			(65,951	)

Recently Issued and Recently Adopted Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This guidance requires entities to provide disclosures about items that are required by U.S. GAAP to be reclassified from accumulated other comprehensive income (“AOCI”) to net income in their entirety in the same reporting period. The disclosure includes the amount of the reclassification and identifies the line item on the statement where net income is presented that is affected by the reclassification. For other items reclassified from AOCI, the disclosure cross-references to other disclosures where additional details about their effects are disclosed. This guidance is effective for reporting periods beginning after December 15, 2012. The adoption of this guidance in the first quarter of 2013 did not have a material effect on the Company’s consolidated financial statements and disclosures.

9

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

In December 2011, the FASB issued ASU 2011-11, Disclosures about Offsetting Assets and Liabilities. This guidance requires entities to disclose both gross and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. This guidance does not amend existing guidance on when it is appropriate to offset. In January 2013, the FASB issued ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which limits the scope of ASU 2011-11 to derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and lending arrangements. The guidance is effective for annual periods beginning January 1, 2013 and interim periods within those annual periods. The Company adopted this guidance in the first quarter of 2013 and has included the required disclosures in note 10, “Derivative Contracts”.

2. Inventories

The Company’s inventories are as follows:

	As of
	June 30, 2013		December 31, 2012
Raw materials and supplies	$	37,111	$	37,766
Work-in-process		83,811		69,286
Finished goods		78,627		67,326
Total inventories	$	199,549	$	174,378

Inventories include costs attributable to direct labor and manufacturing overhead but are primarily comprised of raw material costs. The material component of inventories that is valued on a last-in, first-out (“LIFO”) basis comprises approximately 72% and 70% of total inventory at June 30, 2013 and December 31, 2012, respectively. Other manufactured inventories, including the non-material components and certain non-U.S. inventories, are valued on a first-in, first-out (“FIFO”) basis. During the second quarter of 2013, the Company reduced the recorded value of inventory by $318. This non-cash, lower of cost or market adjustment was recorded in cost of sales in the accompanying consolidated statement of operations.

If all inventories had been valued at period-end market values, inventories would have been approximately $303,937 and $319,282 at June 30, 2013 and December 31, 2012, respectively.

10

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

3. Prepaid Expenses and Other Current Assets

The Company’s prepaid expenses and other current assets are as follows:

	As of
	June 30, 2013		December 31, 2012
Collateral on deposit—commodity derivative contracts	$	267	$	767
Commodity derivative contracts		458		548
Deferred expense		12,003		—
Loss fund payments—workers’ compensation		6,883		6,968
Prepaid insurance		2,131		1,261
Prepaid tooling		1,604		764
Other		1,746		1,833
Total prepaid expenses and other current assets	$	25,092	$	12,141

4. Goodwill

On January 31, 2008, the Company, through its Chase reportable segment, acquired certain assets of the brass business of Bolton Metals Product Company (“Bolton”). As of June 30, 2013 and December 31, 2012, the carrying value of goodwill was $4,399. All goodwill is assigned to Chase, which is the Company’s applicable reporting unit for purposes of testing goodwill impairment. The Bolton acquisition is treated as an asset acquisition for tax purposes. As of June 30, 2013, $2,025 of goodwill is expected to be deductible for tax purposes.

5. Investment in Joint Venture

The Company owns a 50% interest in Dowa – Olin Metal Corporation (“Dowa”), a joint venture based in Japan. The Company accounts for Dowa under the equity method of accounting. Due to the timing of the receipt of available financial information, the results of Dowa are recorded on a one-month lag basis.

In November 2007, the equity investment in Dowa, which was purchased as part of the metals business acquired from Olin Corporation, was recorded at a carrying value of zero as a result of the bargain purchase event recognized under the purchase method of accounting for the acquisition, creating a negative basis difference of $9,416. Based on management’s estimate as to the underlying commercial utility of the alloys that Dowa manufactured and sold at the date of acquisition, the negative basis difference is being accreted on a straight-line basis over a 13-year period as an increase to equity earnings. Accretion of the negative basis difference of $181 was reflected in equity income, net of tax in the accompanying consolidated statements of operations for each of the three months ended June 30, 2013 and 2012 and $362 for each of the six months ended June 30, 2013 and 2012. At June 30, 2013 and December 31, 2012, the remaining negative basis difference was $5,373 and $5,735, respectively.

11

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

No cash dividends were received from Dowa during the six months ended June 30, 2013. During the six months ended June 30, 2012, the Company received cash dividends from Dowa of $500, which were recorded as a reduction in the Company’s investment in Dowa. During the three months ended June 30, 2013 and 2012, the Company recorded $508 and $201, respectively, of equity income, net of tax, including $181 of accretion of the negative basis difference in each period. During the six months ended June 30, 2013 and 2012, the Company recorded equity income, net of tax of $860 and $475, respectively, including $362 of accretion of the negative basis difference in each period. The undistributed earnings of Dowa in GBC’s retained earnings as of June 30, 2013 and December 31, 2012 totaled $922 and $62, respectively.

6. Other Noncurrent Assets

Other noncurrent assets consisted of the following:

	As of
	June 30, 2013		December 31, 2012
Deferred financing fees, net	$	15,852	$	17,082
Utility and other deposits		942		668
Interest rate cap agreements		—		1
Other		—		4
Total other noncurrent assets	$	16,794	$	17,755

7. Accrued Liabilities

Accrued liabilities consisted of the following:

	As of
	June 30, 2013		December 31, 2012
Personnel expense	$	15,727	$	20,872
Workers’ compensation		15,281		15,754
Deferred revenue		11,952		—
Professional fees		870		2,145
Insurance		2,150		2,253
Utilities		1,607		1,844
Taxes		1,097		1,745
Tooling		712		686
Other		3,289		3,125
Total accrued liabilities	$	52,685	$	48,424

12

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

8. Financing

Long-term debt consisted of the following:

	As of
	June 30,		December 31,
	2013		2012
ABL Facility	$	56,000	$	14,522
Senior Secured Notes		375,000		375,000
Total long-term debt	$	431,000	$	389,522

Senior Secured Notes

On June 1, 2012, GBC issued $375,000 in aggregate principal amount of 9.50% Senior Secured Notes due 2019 (the “Senior Secured Notes”). The Senior Secured Notes mature on June 1, 2019. Interest on the Senior Secured Notes accrues at the rate of 9.50% per annum and is payable semiannually in arrears on June 1 and December 1, commencing on December 1, 2012.

The credit agreement governing the ABL Facility (hereinafter defined) and the indenture governing the Senior Secured Notes (the “Indenture”) limit the ability of GBC and its subsidiaries to dividend or distribute cash to Holdings and to its equityholders, although ordinary course dividends and distributions to meet the limited holding company expenses and related obligations at Holdings of up to $5 million per year are permitted under those agreements. Under the terms of the Indenture, GBC is also permitted to dividend or distribute to Holdings and its equityholders up to 50% of its “Consolidated Net Income” (as such term is used in the Indenture) from April 1, 2012 to the end of GBC’s most recently ended fiscal quarter. All of the net assets of the subsidiaries are restricted except for $28,629, which are permitted dividend distributions under the Indenture.

Pursuant to a registration rights agreement, dated as of June 1, 2012, the Company is required to effect a registered offer to issue registered new notes (with substantially the same terms as the Senior Secured Notes) in exchange for the Senior Secured Notes that the Company issued in a private offering on June 1, 2012. Pursuant to the terms of the registration rights agreement, if the Company had not caused the registration statement for the exchange offer to become effective within 365 days after June 1, 2012, or otherwise failed to comply with the other deadlines in the registration rights agreement, the Company is required to pay additional interest on the Senior Secured Notes equal to 0.25% per annum for each 90 days it is in default, up to a maximum of 0.50% per annum (the “Additional Interest”).

As of June 1, 2013, the registration statement for the exchange offer had not yet become effective, and accordingly, the Company is now required to pay a default rate of 0.25% per annum in addition to the stated rate of 9.50%. The Company filed a Form S-4 Registration Statement under the Securities Act of 1933 on June 10, 2013 and a subsequent amended Form S-4 Registration Statement on July 24, 2013 with respect to the proposed exchange of the Senior Secured Notes. Upon completion of the exchange offer, the Company’s obligation to pay any future Additional Interest will terminate.

13

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

ABL Facility

Concurrent with the issuance of the Senior Secured Notes, the Company amended the agreement governing its asset-based revolving loan facility (the “ABL Facility”).

The unused portion of the ABL Facility was $143,500 and $184,978 as of June 30, 2013 and December 31, 2012, respectively. As of June 30, 2013 and December 31, 2012, amounts outstanding under the ABL Facility accrued interest at a rate of 4.25% and 4.50%, respectively.

The ABL Facility has an expiration date of June 1, 2017 and contains various debt covenants to which the Company is subject on an ongoing basis. As of June 30, 2013, the Company was in compliance with all of its covenants under the ABL Facility.

9. Income Taxes

The effective income tax rate, which is provision for (benefit from) income taxes as a percentage of income (loss) before provision for (benefit from) income taxes and equity income, differs from the amount determined by applying the applicable U.S. statutory federal income tax rate to pretax results primarily as a result of the following:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Statutory provision rate		35.0	%		35.0	%		35.0	%		35.0	%
Permanent differences and other items
State tax provision		(5.4	%)		4.0	%		19.2	%		1.2	%
Section 199 manufacturing credit		5.0	%		(1.7	%)		(16.4	%)		(0.5	%)
Return to provision adjustments / Uncertain tax positions		0.6	%		3.1	%		(2.5	%)		(69.0	%)
Non-deductible non-cash compensation		(92.0	%)		(36.2	%)		169.1	%		838.2	%
Other		(1.3	%)		0.4	%		2.0	%		(9.0	%)
Effective income tax rate		(58.1	%)		4.6	%		206.4	%		795.9	%

The “Non-deductible non-cash compensation” expense as described further in note 14, “Profits Interest Awards,” is not deductible in the Company’s tax returns and has been reflected as a permanent difference in the effective tax rate reconciliations above.

As of June 30, 2013 and December 31, 2012, the Company had $27,314 and $27,401 respectively, of unrecognized tax benefits, none of which would impact the effective tax rate, if recognized. Estimated interest and penalties related to the underpayment of income taxes were $16 and $15 for the three and six months ended June 30, 2013, respectively, and were reduced by $179 and $160 for the three and six months ended June 30, 2012, respectively, and are classified as a component of income tax expense in the accompanying consolidated statements of operations. Accrued interest and penalties as of June 30, 2013 and December 31, 2012 were $51 and $35, respectively, inclusive of the estimated interest and penalties mentioned above. The Company’s liability for uncertain tax positions of $27,365 and $27,436 at June 30, 2013 and December 31, 2012, respectively, are presented in other noncurrent liabilities.

14

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

The Company is subject to income taxation in several jurisdictions around the world. Management believes that an adequate provision has been made for any adjustments that may result from tax examinations. However, the outcome of tax audits cannot be predicted with certainty. If any issues addressed in the Company’s tax audits are resolved in a manner not consistent with management’s expectations, the Company could be required to adjust its provision for income tax in the period such resolution occurs. Although timing of the resolution and/or closure of audits is not certain, the Company believes it has adequately reserved for any potential tax exposures at June 30, 2013. The Internal Revenue Service completed its examination of the Corporation’s income tax returns through the period ended December 31, 2010. The Company’s U.S. federal returns for the period ended December 31, 2011 and all subsequent periods remain open for audit. The majority of state returns for the period ended September 30, 2010 and all subsequent periods remain open for audit.

10. Derivative Contracts

The Company maintains a metal, natural gas and electricity pricing risk-management strategy that uses commodity derivative contracts to minimize significant, unanticipated gains or losses and cash fluctuations that may arise from volatility of the commodity indices.

The Company’s commodity derivative contracts consist of delivery contracts matched in quantity, price and maturity to firm price sales orders, in circumstances where physical firm price metal is unavailable, in order to protect sales margins from metal price fluctuations between the firm price sale order date and shipment date.

The prices of natural gas and electricity can be particularly volatile. As a result, our natural gas and electricity costs may fluctuate dramatically. The Company attempts to mitigate short-term volatility in natural gas and electricity costs through the use of derivatives contracts in an effort to offset the effect of increasing costs.

The Company also utilized interest rate cap agreements in compliance with the requirement under its prior senior secured term loan credit facility (the “Term Loan Facility”) to provide that at least 50% of the term loan be subject to a fixed rate or interest rate protection for a period of not less than three years. In June 2012, the Term Loan Facility was repaid and retired. During 2010, the Company entered into three-year interest rate cap agreements that capped the interest rate on $300,000 of the aggregate principal outstanding. The interest rate cap agreements are not designated as an accounting hedge and changes in the fair value of the interest rate cap agreements are recorded as non-cash interest expense.

By using derivative contracts to limit exposures to fluctuations in metal, natural gas and electricity prices and interest rate movements, the Company exposes itself to credit risk and market risk. Credit risk is the risk that the counterparty might fail to fulfill its performance obligations under the terms of the derivative contract. Market risk is the risk that the value of a derivative instrument might be adversely affected by a change in commodity price or interest rates. The Company manages the market risk associated with derivative contracts by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken.

The Company only executes derivative instruments with counterparties with investment-grade credit ratings. These counterparties expose the Company to credit risk in the event of non-performance. The amount of such exposure is limited to the fair value of the derivative contract plus the unpaid portion of amounts due to the Company pursuant to terms of the derivative contracts, if any. If a downgrade in the credit rating of these counterparties occurs, management believes that this exposure is mitigated by provisions in the derivative arrangements which allow for the legal right of offset of any amounts due to the Company from the counterparties with any amounts payable to the counterparties by the Company.

15

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

The fair values of derivative contracts in the consolidated balance sheet include the impact of netting derivative assets and liabilities when a legally enforceable master netting arrangement exists. The following tables summarize the gross amounts of recognized derivative assets and liabilities, the net amounts presented in the consolidated balance sheet, and the net amounts after deducting collateral that has been deposited with counterparties:

	As of June 30, 2013
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Assets		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Assets Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amount
Open metal contracts	$	1,953	$	(1,574	)	$	379	$	—	$	—	$	379
(334 contracts)
Open electricity contracts		79		—			79		—		—		79
(6 contracts)
Interest rate cap agreements		—		—			—		—		—		—
(2 contracts)
Total	$	2,032	$	(1,574	)	$	458	$	—	$	—	$	458
Consolidated balance sheet location:
Prepaid expenses and other current assets			$	458
Total			$	458
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Liabilities Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Deposited		Net Amount
Open metal contracts	$	1,574	$	(1,574	)	$	—	$	—	$	—	$	—
(218 contracts)
Total	$	1,574	$	(1,574	)	$	—	$	—	$	—	$	—

Not included in the above table is $267 of collateral included in prepaid expenses and other current assets, which is because collateral is limited to the net amounts of assets or liabilities presented in the consolidated balance sheet.

16

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	As of December 31, 2012
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Assets		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Assets Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amount
Open metals contracts	$	603	$	(224	)	$	379	$	—	$	—	$	379
(208 contracts)
Open natural gas contracts		2		—			2		—		—		2
(6 contracts)
Open electricity contracts		169		(2	)		167		—		—		167
(17 contracts)
Interest rate cap agreements		1		—			1		—		—		1
(2 contracts)
Total	$	775	$	(226	)	$	549	$	—	$	—	$	549
Consolidated balance sheet location:
Prepaid expenses and other current assets			$	548
Other noncurrent assets				1
Total			$	549
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Liabilities Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Deposited		Net Amount
Open metals contracts	$	224	$	(224	)	$	—	$	—	$	—	$	—
(85 contracts)
Open electricity contracts		2		(2	)		—		—		—		—
(1 contract)
Total	$	226	$	(226	)	$	—	$	—	$	—	$	—

Not included in the above table is $767 of collateral included in prepaid expenses and other current assets, which is because collateral is limited to the net amounts of assets or liabilities presented in the consolidated balance sheet.

17

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

The following table summarizes the effects of derivative contracts in the consolidated statements of operations:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Cost of sales
Realized and unrealized gain (loss)—metal contracts	$	634		$	(606	)	$	651		$	504
Realized and unrealized gain (loss)—natural gas contracts		—			34			(2	)		69
Realized and unrealized (loss) gain—electricity contracts		(165	)		147			(85	)		(35	)
Total	$	469		$	(425	)	$	564		$	538
Interest expense
Unrealized loss—interest rate cap agreements	$	—		$	(12	)	$	(1	)	$	(146	)

11. Fair Value Measurements

ASC 820 defines fair value, establishes a framework for measuring fair value and enhances disclosures about fair value measures required under other accounting pronouncements but does not change existing guidance as to whether or not an instrument is carried at fair value. This guidance also specifies a fair value hierarchy based upon the observability of inputs used in valuation techniques. In accordance with this guidance, fair value measurements are classified under the following hierarchy:

• Level 1—Quoted prices for identical instruments in active markets.

• Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs or significant value-drivers are observable in active markets.

• Level 3—Model-derived valuations in which one or more significant inputs or significant value-drivers are unobservable.

The following tables provide the hierarchy of inputs used to derive the fair value of the Company’s assets at fair value on a recurring basis as of June 30, 2013 and December 31, 2012:

	As of June 30, 2013
	Level 1		Level 2		Level 3		Total
Open metal contracts	$	—	$	379	$	—	$	379
Open electricity contracts		—		79		—		79
Total assets	$	—	$	458	$	—	$	458

18

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	As of December 31, 2012
	Level 1		Level 2		Level 3		Total
Open metal contracts	$	—	$	379	$	—	$	379
Open natural gas contracts		—		2		—		2
Open electricity contracts		—		167		—		167
Interest rate cap agreements		—		1		—		1
Total assets	$	—	$	549	$	—	$	549

In accordance with ASC 820, the Company determines the fair value of its interest rate agreement and commodity derivative contracts using Level 2 inputs.

The Company’s metal, natural gas and electricity commodity derivative contracts are considered Level 2 as fair value measurements consist of both quoted price inputs and inputs provided by a third party that are derived principally from or corroborated by observable market data by correlation. These assumptions include, but are not limited to, those concerning interest rates, credit rates, discount rates, default rates and other factors. All derivative commodity contracts have a set term of 24 months or less.

The Company’s interest rate cap agreements are considered Level 2 fair value measurements as the pricing is derived from discounting the future expected cash flows that would occur if variable interest rates rise above the strike rates of the caps. The variable interest rates used in the calculation of projected cash flows on the caps are based on an expectation of future interest rates derived from observable market interest rate curves (LIBOR forward curves) and volatilities that are observable at commonly quoted intervals.

The Company does not hold assets or liabilities requiring a Level 3 measurement and there have not been any transfers between the hierarchy levels during 2013 or 2012.

For purposes of financial reporting, the Company has determined that the carrying value of cash, accounts receivable, accounts payable, and accrued expenses approximates fair value due to the short maturities of these instruments. Additionally, given the revolving nature and the variable interest rates, the Company has determined that the carrying value of the ABL Facility also approximates fair value. As of June 30, 2013, the fair value of the Company’s Senior Secured Notes approximated $401,250. The fair value of the Senior Secured Notes was based upon quotes from financial institutions (Level 2 in the fair value hierarchy as defined by ASC 820).

12. Related Parties

KPS Special Situations Fund II, L.P., KPS Special Situations Fund II (A), L.P., KPS Special Situations Fund III, L.P. and KPS Special Situations Fund III (A), L.P. (together, “KPS Funds”) are majority shareholders of Halkos. As of June 30, 2013, Halkos owned 61.5% of the outstanding shares of Holdings.

The Company and affiliates of KPS Funds entered into an agreement whereby affiliates of KPS Funds charge the Company for services of their personnel engaged in line or staff functions relating specifically to the operations of the Company (the “Management Services Agreement”). In May 2013, in connection with the IPO, the Company terminated the Management Services Agreement prior to the expiration of the initial term and was required to pay the affiliates of KPS Funds an early termination fee equal to the value of the advisory fee that would have otherwise been payable to the affiliates of KPS Funds through the end of the Management Services

19

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

Agreement. The Company paid $4,500 to the affiliates of KPS Funds related to the Company’s early termination and all unpaid management advisory fees. The total charges, which are included in selling, general and administrative expenses, were $4,500 and $4,750 for the three and six months ended June 30, 2013, respectively, and $250 and $500 for the three and six months ended June 30, 2012, respectively. As of December 31, 2012, $250 of these charges were accrued for in accrued liabilities. Additionally, pursuant to the Management Services Agreement, the Company is required to reimburse the affiliates of KPS Funds for all reasonable costs and expenses incurred in connection with the services provided. These costs were $7 and $18 for the three and six months ended June 30, 2013, respectively, and $21 and $62 for the three and six months ended June 30, 2012, respectively.

The Company and KPS Funds entered into an agreement dated October 18, 2011 whereby the KPS Funds agreed to reimburse the Company for specific incremental costs directly attributable to an offering of equity securities (the “KPS Reimbursement Obligation”). As of December 31, 2012, the Company had recorded $4,875 as a receivable from stockholder pertaining to the KPS Reimbursement Obligation. Pursuant to the completion of the Company’s initial public offering, KPS Funds reimbursed the Company all amounts owed in connection with the KPS Reimbursement Obligation.

13. Commitments and Contingencies

Environmental Considerations

The Company is subject to a variety of environmental laws and regulations governing discharges to air and water, the handling, storage and disposal of hazardous or solid waste materials and the remediation of contamination associated with releases of hazardous substances. Although the Company believes it is in material compliance with all of the various regulations applicable to its business, there can be no assurance that requirements will not change in the future or that the Company will not incur significant cost to comply with such requirements. The Company employs responsible personnel at each facility, along with various environmental engineering consultants from time to time to assist with ongoing management of environmental, health and safety requirements. Management expenses environmental costs related to existing conditions resulting from past or current operations and from which no current or future benefit is discernible. Expenditures that extend the life of the related property are capitalized. The Company determines its liability on a location by location basis and records a liability at the time it is deemed probable and can be reasonably estimated. The Company is currently not aware of any environmental matters which may have a material impact on the Company’s financial position, results of operations, or liquidity.

On November 19, 2007 (the date of inception of GBC), the Company acquired the assets and operations relating to the worldwide metals business of Olin Corporation. Olin Corporation agreed to retain liability arising out of the existing conditions on certain of our properties for any remedial actions required by environmental laws, and agreed to indemnify the Company for all or part of a number of other environmental liabilities. Since 2007, Olin Corporation has been performing remedial actions at the facilities in East Alton, Illinois and Waterbury, Connecticut, and has been participating in remedial actions at certain other properties as well. If Olin Corporation were to stop its environmental remedial activities at the Company’s properties, the Company could be required to assume responsibility for these activities, the cost of which could be material.

20

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

Insurance Coverage

The Company maintains Comprehensive Medical Plans for employees of GBC and its subsidiaries (the “Plans”) to provide health insurance for eligible employees on a self-insured basis. The Plans are covered by a stop loss policy for those benefits provided on a self-insured basis with a deductible of $275 per occurrence for all GBC employees, except for employees of our Chase Brass division, which has a deductible of $100 per occurrence. The policy for our Chase Brass division also has a specific stop loss maximum resulting in the Company being responsible for paying the amount in excess of $2,000 per occurrence.

The Company is self-insured for workers’ compensation claims assumed from its predecessor company for activity prior to November 19, 2007. Workers’ compensation claims relating to activity after November 19, 2007 are covered by a loss funding insurance arrangement whereby the Company makes a fixed payment to the insurer which is used to pay submitted claims. The Company is self-insured for annual workers’ compensation costs relating to activity after November 19, 2007 of up to $500 per occurrence.

Legal Considerations

The Company is party to various legal proceedings arising in the ordinary course of business. The Company believes that none of its lawsuits are individually material or that the aggregate exposure of all of its lawsuits, including those that are probable and those that are only reasonably possible, is material to its financial condition, results of operations or cash flows.

14. Profits Interest Awards

Halkos has granted, pursuant to the Halkos Equity Plan, non-voting membership interests to select members of the Company’s management titled “Class B Shares.” The Class B Shares are profits interests in Halkos.

Certain members of the Company’s management may receive distributions from Halkos to the extent their Class B Shares were vested. During the six months ended June 30, 2013 and 2012, GBC executives received $8,902 and $19,517, respectively. These distributions were accounted for by GBC as non-cash compensation expense with a corresponding increase in additional paid-in capital in the period in which the distributions were determined to be probable.

In June 2013, Halkos modified the Halkos Equity Plan to (i) eliminate its right to acquire all or a portion of the Class B Shares for less than fair market value for certain specifically identified employees and (ii) eliminate its right to acquire all or a portion of the Class B Shares for less than fair market value upon either (a) voluntary termination of employment without good reason or (b) breach of confidentiality or non-compete provisions subsequent to terminating employment for all other Class B Share award recipients. This modification to the Halkos Equity Plan triggered the recognition of additional non-cash compensation expense reflecting the fair value of vested Class B Shares as of the date of modification of the Halkos Equity Plan. The observable market price of the Company’s publicly traded shares was used to determine the fair value of the Class B Shares. In June 2013, the Company recognized $20,369 of incremental non-cash compensation as a result of the modification.

15. Segment Information

The Company’s Chief Operating Decision Maker allocates resources and evaluates performance at the divisional level. As such, the Company has determined that it has three reportable segments: Olin Brass, Chase and Oster.

21

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

Olin Brass is a leading manufacturer and converter of copper and brass sheet, strip and fabricated products. Olin Brass also rerolls and forms other alloys such as stainless, carbon steel and aluminum. Olin Brass’s products are used in five primary end markets: building and housing, munitions, automotive, coinage, and electronics/electrical components.

Chase is a leading manufacturer of brass rod in North America. Chase primarily manufactures brass rod, including round and other shapes, ranging from 1/4 inch to 4.5 inches in diameter. The key attributes of brass rod include its machinability, corrosion resistance and moderate strength, such as valves and fittings. Brass rod is generally manufactured from copper or copper-alloy scrap. Chase produces brass rod used in production applications which can be grouped into four primary end markets: building and housing, transportation, electronics/electrical components and industrial machinery and equipment.

Oster is a processing distributor of copper and copper-alloy sheet, strip and foil. Oster operates six strategically-located service centers in the United States, Puerto Rico and Mexico. Each Oster service center reliably provides a broad range of high quality products at quick lead-times in small quantities. These capabilities, combined with Oster’s operations of precision slitting, hot tinning, traverse winding, cutting, edging and special packaging, provide value to a broad customer base. Oster’s products are used in three primary end markets: building and housing, automotive and electronics/electrical components.

The Chief Operating Decision Maker evaluates performance and determines resource allocations based on a number of factors, the primary performance measure being Segment Adjusted EBITDA.

Segment Adjusted EBITDA is an EBITDA based measure of operating performance, with EBITDA being defined by the Company as net income before depreciation and amortization, interest expense, and income taxes. The Company defines Segment Adjusted EBITDA as EBITDA further adjusted to remove the impacts of inventory values for LIFO and lower of cost or market charges, the cost of terminating certain collateral hedges, unrealized mark to market gains and losses on derivative instruments, non-cash compensation expense, share-based compensation expense, loss on extinguishment of debt and non-cash income accretion related to the Company’s joint venture investment, each of which are excluded because management believes they are not indicative of the ongoing performance of the Company’s core operations. Corporate and Other includes compensation for corporate executives and officers, corporate office and administrative salaries, and professional fees for accounting, tax and legal services. Corporate and Other also includes interest expense, state and Federal income taxes, overhead costs that management has not allocated to our operating segments and the elimination of intercompany balances.

22

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

Below is a reconciliation of the Company’s Segment Adjusted EBITDA to income before provision for income taxes and equity income:

			Three Months Ended June 30,						Six Months Ended June 30,
			2013			2012			2013			2012
Net Sales, External Customers
Olin Brass			$	216,500		$	165,803		$	403,065		$	332,090
Chase				164,697			165,922			339,179			354,609
Oster				80,281			85,254			164,196			173,671
Total net sales, external customers			$	461,478		$	416,979		$	906,440		$	860,370
Intersegment Net Sales
Olin Brass			$	14,210		$	12,754		$	28,548		$	25,107
Chase				7			156			7			302
Oster				42			19			108			22
Total intersegment net sales			$	14,259		$	12,929		$	28,663		$	25,431
Segment Adjusted EBITDA
Olin Brass			$	16,233		$	13,062		$	27,683		$	23,751
Chase				18,954			17,251			37,835			37,191
Oster				4,303			5,208			8,853			10,428
Total segment adjusted EBITDA				39,490			35,521			74,371			71,370
Corporate and Other				(8,500	)		(5,550	)		(14,327	)		(9,429	)
Loss on extinguishment of debt				—			(19,612	)		—			(19,612	)
Depreciation and amortization				(2,072	)		(1,681	)		(3,981	)		(3,205	)
Interest expense				(9,959	)		(10,209	)		(19,834	)		(19,958	)
Equity method investment income	(A	)		(327	)		(20	)		(498	)		(113	)
Net income attributable to noncontrolling interest				61			114			159			168
Lower of cost or market adjustment to inventory				(318	)		—			(318	)		—
(Loss) gain on derivative contracts				(41	)		(109	)		(62	)		1,204
Share-based compensation expense				(181	)		—			(181	)		—
Compensation expense—profits interest awards				(29,271	)		(19,517	)		(29,271	)		(19,517	)
(Loss) income before provision for (benefit from) income taxes and equity income			$	(11,118	)	$	(21,063	)	$	6,058		$	908

(A) Excludes accretion income of $181 and $362 in each of the three and six months ended June 30, 2013 and 2012. Equity method investment income is exclusive to Olin Brass.

16. Earnings Per Share

Basic earnings per share is computed based on the weighted-average number of common shares outstanding and diluted earnings per share is computed based on the weighted-average number of common shares outstanding adjusted by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued. Potentially dilutive securities include stock options and nonvested share awards. Nonvested performance-based share awards are included in the average diluted shares outstanding for each period if established performance criteria have been met at the end of the respective periods.

23

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

The following table sets forth the computation of basic and diluted earnings per share attributable to the Company:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Numerator
Net loss attributable to Global Brass and Copper Holdings, Inc.	$	(17,132	)	$	(20,005	)	$	(5,744	)	$	(6,012	)
Denominator
Weighted-average common shares outstanding		21,110,000			21,110,000			21,110,000			21,110,000
Effect of potentially dilutive securities: Stock options and nonvested share awards		—			—			—			—
Weighted-average common shares outstanding, assuming dilution		21,110,000			21,110,000			21,110,000			21,110,000
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)
Diluted	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)

In the second quarter of 2013, the Company granted 104,444 options to purchase shares of common stock, 136,080 nonvested shares of restricted stock, and 98,441 nonvested performance-based shares to certain members of the Company’s management and its Board of Directors. For the three months and six months ended June 30, 2013, the dilutive effect of 8,555 shares and 4,278 shares, respectively, of nonvested restricted stock was excluded from the earnings per share calculation as they would be anti-dilutive given the loss in the periods.

17. Stock Split

On April 10, 2013 the Company’s Board of Directors authorized a 211,100-to-1 stock split to be effected after the effective date of the Company’s Form S-1 Registration Statement and prior to the completion of the Company’s initial public offering. On May 29, 2013 the Company completed its initial public offering of 8,050,000 shares of its common stock at a price of $11.00 per share. The share numbers and per share amounts disclosed in the consolidated financial statements and notes to consolidated financial statements have been retroactively adjusted to give effect to the stock split.

The balance sheets have been retroactively adjusted for the impact of the stock split by an increase to common stock of $211 with an offsetting charge to accumulated deficit.

18. Condensed Consolidating Financial Information

In June 2012, Holdings (presented as “Parent” in the following tables), through its wholly-owned principal operating subsidiary, GBC (presented as “Issuer” in the following tables), issued Senior Secured Notes as further described in note 8, “Financing”. The Senior Secured Notes are jointly and severally guaranteed on a senior secured basis by Holdings and substantially all existing 100%-owned U.S. subsidiaries of GBC and any future restricted subsidiaries (which are set forth in

24

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

more detail in the Indenture) who guarantee or incur certain types of Permitted Debt under the Indenture (collectively, the “Guarantors”). The guarantees are full and unconditional, except that a Guarantor can be automatically released and relieved of its obligations under certain customary provisions contained in the Indenture. Under these customary provisions, a Guarantor is automatically released from its obligations as a guarantor upon the sale of the Guarantor or substantially all of its assets to a third party, the designation of the Guarantor as an unrestricted subsidiary in accordance with the terms of the Indenture, the release or discharge of all guarantees by such Guarantor and the repayment of all indebtedness, or upon the Issuer’s exercise of its legal defeasance option or covenant defeasance option or if the obligations under the Indenture are discharged in accordance with the terms of the Indenture. All other subsidiaries of GBC, whether direct or indirect, do not guarantee the Senior Secured Notes (collectively, the “Non-Guarantors”).

Holdings is also a guarantor of the ABL Facility and substantially all of its 100%-owned U.S. subsidiaries are borrowers under, or guarantors of, the ABL Facility on a senior secured basis.

The following condensed consolidating financial information presents the financial position, results of operations, comprehensive income and cash flows of (1) the Parent, (2) the Issuer, (3) the Guarantors, (4) the Non-Guarantors and (5) eliminations to arrive at the information for the Company on a consolidated basis. The condensed consolidating financial information presented below is not necessarily indicative of the financial position, results of operations, comprehensive income or cash flows of the Parent, the Issuer, the Guarantors or the Non-Guarantors on a stand-alone basis.

25

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Balance Sheet
	As of June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current assets:
Cash	$	—		$	34,457		$	—	$	4,207	$	(4,654	)	$	34,010
Accounts receivable, net of allowance		—			4,815			182,082		16,443		—			203,340
Inventories		—			—			181,937		17,902		(290	)		199,549
Prepaid expenses and other current assets		—			10,030			14,925		195		(58	)		25,092
Deferred income taxes		—			31,760			—		—		—			31,760
Income tax receivable		—			2,147			—		—		—			2,147
Total current assets		—			83,209			378,944		38,747		(5,002	)		495,898
Property, plant and equipment, net		—			985			73,999		346		—			75,330
Investment in joint venture		—			—			2,168		—		—			2,168
Investment in subsidiaries		—			591,583			19,336		—		(610,919	)		—
Intercompany accounts		—			—			253,943		—		(253,943	)		—
Goodwill		—			—			4,399		—		—			4,399
Intangible assets, net		—			—			787		—		—			787
Deferred income taxes		—			6,826			—		—		—			6,826
Other noncurrent assets		—			15,878			916		—		—			16,794
Total assets	$	—		$	698,481		$	734,492	$	39,093	$	(869,864	)	$	602,202
Liabilities and (deficit) / equity
Current liabilities:
Accounts payable	$	—		$	290		$	108,410	$	3,283	$	(5,002	)	$	106,981
Accrued liabilities		—			17,494			34,455		736		—			52,685
Accrued interest		—			3,395			—		—		—			3,395
Income taxes payable		—			39			44		251		—			334
Total current liabilities		—			21,218			142,909		4,270		(5,002	)		163,395
Long-term debt		—			431,000			—		—		—			431,000
Other noncurrent liabilities		—			27,678			—		—		—			27,678
Obligations and advances in excess of investment in subsidiary		16,502			—			—		—		(16,502	)		—
Intercompany accounts		7,145			235,087			—		11,711		(253,943	)		—
Total liabilities		23,647			714,983			142,909		15,981		(275,447	)		622,073
Commitments and contingencies		—			—			—		—		—			—
Global Brass and Copper Holdings, Inc. stockholder’s (deficit) / equity		(23,647	)		(16,502	)		591,583		19,336		(594,417	)		(23,647	)
Noncontrolling interest		—			—			—		3,776		—			3,776
Total (deficit) / equity		(23,647	)		(16,502	)		591,583		23,112		(594,417	)		(19,871	)
Total liabilities and (deficit) / equity	$	—		$	698,481		$	734,492	$	39,093	$	(869,864	)	$	602,202

26

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Balance Sheet
	As of December 31, 2012
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current assets:
Cash	$	—		$	8,537		$	—	$	5,446	$	(121	)	$	13,862
Accounts receivable, net of allowance		—			4,630			144,533		15,154		—			164,317
Inventories		—			343			158,713		15,885		(563	)		174,378
Prepaid expenses and other current assets		—			9,229			2,600		312		—			12,141
Deferred income taxes		—			33,465			—		—		—			33,465
Income tax receivable, net		—			1,656			—		—		(356	)		1,300
Total current assets		—			57,860			305,846		36,797		(1,040	)		399,463
Property, plant and equipment, net		—			1,154			69,646		327		—			71,127
Investment in joint venture		—			—			2,972		—		—			2,972
Investment in subsidiaries		—			522,912			19,850		—		(542,762	)		—
Intercompany accounts		—			—			223,081		—		(223,081	)		—
Goodwill		—			—			4,399		—		—			4,399
Intangible assets, net		—			—			839		—		—			839
Deferred income taxes		—			6,138			—		—		—			6,138
Other noncurrent assets		—			17,115			640		—		—			17,755
Total assets	$	—		$	605,179		$	627,273	$	37,124	$	(766,883	)	$	502,693
Liabilities and (deficit) / equity
Current liabilities:
Accounts payable	$	—		$	1,398		$	77,390	$	2,910	$	(121	)	$	81,577
Accrued liabilities		—			20,592			26,971		861		—			48,424
Accrued interest		—			3,287			—		—		—			3,287
Income taxes payable		—			248			—		356		(356	)		248
Total current liabilities		—			25,525			104,361		4,127		(477	)		133,536
Long-term debt		—			389,522			—		—		—			389,522
Other noncurrent liabilities		—			27,436			—		—		—			27,436
Obligations and advances in excess of investment in subsidiary		42,522			—			—		—		(42,522	)		—
Intercompany accounts		8,829			205,218			—		9,597		(223,644	)		—
Total liabilities		51,351			647,701			104,361		13,724		(266,643	)		550,494
Commitments and contingencies		—			—			—		—		—			—
Global Brass and Copper Holdings, Inc. stockholder’s (deficit) / equity		(51,351	)		(42,522	)		522,912		19,850		(500,240	)		(51,351	)
Noncontrolling interest		—			—			—		3,550		—			3,550
Total (deficit) / equity		(51,351	)		(42,522	)		522,912		23,400		(500,240	)		(47,801	)
Total liabilities and (deficit) / equity	$	—		$	605,179		$	627,273	$	37,124	$	(766,883	)	$	502,693

27

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Operations
	Three Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net sales	$	—		$	—		$	444,057		$	25,522	$	(8,101	)	$	461,478
Cost of sales		—			(415	)		394,201			24,093		(8,101	)		409,778
Gross profit		—			415			49,856			1,429		—			51,700
Selling, general and administrative expenses		4,802			24,512			22,840			701		—			52,855
Operating income (loss)		(4,802	)		(24,097	)		27,016			728		—			(1,155	)
Interest expense		—			9,959			—			—		—			9,959
Other (income) expense, net		—			97			(213	)		120		—			4
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(4,802	)		(34,153	)		27,229			608		—			(11,118	)
Provision for (benefit from) income taxes		(1,848	)		(4,553	)		12,446			416		—			6,461
Income (loss) before equity income (loss)		(2,954	)		(29,600	)		14,783			192		—			(17,579	)
Equity income (loss), net of tax		(14,178	)		15,422			639			—		(1,375	)		508
Net income (loss)		(17,132	)		(14,178	)		15,422			192		(1,375	)		(17,071	)
Less: Net income attributable to noncontrolling interest		—			—			—			61		—			61
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(17,132	)	$	(14,178	)	$	15,422		$	131	$	(1,375	)	$	(17,132	)

28

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Operations
	Three Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net sales	$	—		$	—		$	397,588	$	24,807		$	(5,416	)	$	416,979
Cost of sales		—			654			352,200		22,420			(5,416	)		369,858
Gross profit (loss)		—			(654	)		45,388		2,387			—			47,121
Selling, general and administrative expenses		440			17,459			19,389		677			—			37,965
Operating income (loss)		(440	)		(18,113	)		25,999		1,710			—			9,156
Interest expense		—			10,209			—		—			—			10,209
Loss on extinguishment of debt		—			19,612			—		—			—			19,612
Other (income) expense, net		—			530			67		(199	)		—			398
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(440	)		(48,464	)		25,932		1,909			—			(21,063	)
Provision for (benefit from) income taxes		(169	)		(14,784	)		14,300		(318	)		—			(971	)
Income (loss) before equity income (loss)		(271	)		(33,680	)		11,632		2,227			—			(20,092	)
Equity income (loss), net of tax		(19,734	)		13,946			2,314		—			3,675			201
Net income (loss)		(20,005	)		(19,734	)		13,946		2,227			3,675			(19,891	)
Less: Net income attributable to noncontrolling interest		—			—			—		114			—			114
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(20,005	)	$	(19,734	)	$	13,946	$	2,113		$	3,675		$	(20,005	)

29

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Operations
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net sales	$	—		$	—		$	872,130		$	48,498	$	(14,188	)	$	906,440
Cost of sales		—			116			777,054			44,842		(14,188	)		807,824
Gross profit		—			(116	)		95,076			3,656		—			98,616
Selling, general and administrative expenses		5,188			28,856			37,056			1,433		—			72,533
Operating income (loss)		(5,188	)		(28,972	)		58,020			2,223		—			26,083
Interest expense		—			19,834			—			—		—			19,834
Other (income) expense, net		—			187			(83	)		87		—			191
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(5,188	)		(48,993	)		58,103			2,136		—			6,058
Provision for (benefit from) income taxes		(1,997	)		(9,953	)		23,690			763		—			12,503
Income (loss) before equity income (loss)		(3,191	)		(39,040	)		34,413			1,373		—			(6,445	)
Equity income (loss), net of tax		(2,553	)		36,487			2,074			—		(35,148	)		860
Net income (loss)		(5,744	)		(2,553	)		36,487			1,373		(35,148	)		(5,585	)
Less: Net income attributable to noncontrolling interest		—			—			—			159		—			159
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(5,744	)	$	(2,553	)	$	36,487		$	1,214	$	(35,148	)	$	(5,744	)

30

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Operations
	Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net sales	$	—		$	—		$	829,135		$	44,619		$	(13,384	)	$	860,370
Cost of sales		—			(1,905	)		738,120			40,464			(13,384	)		763,295
Gross profit		—			1,905			91,015			4,155			—			97,075
Selling, general and administrative expenses		735			21,812			32,044			1,297			—			55,888
Operating income (loss)		(735	)		(19,907	)		58,971			2,858			—			41,187
Interest expense (income)		—			19,961			(3	)		—			—			19,958
Loss on extinguishment of debt		—			19,612			—			—			—			19,612
Other (income) expense, net		—			597			251			(139	)		—			709
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(735	)		(60,077	)		58,723			2,997			—			908
Provision for (benefit from) income taxes		(283	)		(19,161	)		26,662			9			—			7,227
Income (loss) before equity income (loss)		(452	)		(40,916	)		32,061			2,988			—			(6,319	)
Equity income (loss), net of tax		(5,560	)		35,356			3,295			—			(32,616	)		475
Net income (loss)		(6,012	)		(5,560	)		35,356			2,988			(32,616	)		(5,844	)
Less: Net income attributable to noncontrolling interest		—			—			—			168			—			168
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,012	)	$	(5,560	)	$	35,356		$	2,820		$	(32,616	)	$	(6,012	)

31

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Three Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net income (loss)	$	(17,132	)	$	(14,178	)	$	15,422		$	192		$	(1,375	)	$	(17,071	)
Foreign currency translation adjustment, net of tax		(489	)		(489	)		(803	)		(177	)		1,518			(440	)
Comprehensive income (loss)		(17,621	)		(14,667	)		14,619			15			143			(17,511	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			110			—			110
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(17,621	)	$	(14,667	)	$	14,619		$	(95	)	$	143		$	(17,621	)

32

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Three Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated
Net income (loss)	$	(20,005	)	$	(19,734	)	$	13,946		$	2,227		$	3,675	$	(19,891	)
Foreign currency translation adjustment, net of tax		(148	)		(148	)		(227	)		(520	)		900		(143	)
Comprehensive income (loss)		(20,153	)		(19,882	)		13,719			1,707			4,575		(20,034	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			119			—		119
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(20,153	)	$	(19,882	)	$	13,719		$	1,588		$	4,575	$	(20,153	)

33

Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	(5,744	)	$	(2,553	)	$	36,487		$	1,373	$	(35,148	)	$	(5,585	)
Foreign currency translation adjustment, net of tax		(879	)		(879	)		(1,462	)		209		2,199			(812	)
Comprehensive income (loss)		(6,623	)		(3,432	)		35,025			1,582		(32,949	)		(6,397	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			226		—			226
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,623	)	$	(3,432	)	$	35,025		$	1,356	$	(32,949	)	$	(6,623	)

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Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	(6,012	)	$	(5,560	)	$	35,356		$	2,988	$	(32,616	)	$	(5,844	)
Foreign currency translation adjustment, net of tax		(145	)		(145	)		(222	)		799		(410	)		(123	)
Comprehensive income (loss)		(6,157	)		(5,705	)		35,134			3,787		(33,026	)		(5,967	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			190		—			190
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,157	)	$	(5,705	)	$	35,134		$	3,597	$	(33,026	)	$	(6,157	)

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Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Cash Flows
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities
Net cash provided by (used in) operating activities	$	—		$	(15,558	)	$	8,103		$	935		$	(11,408	)	$	(17,928	)
Cash flows from investing activities
Capital expenditures		—			—			(8,268	)		(37	)		—			(8,305	)
Payable to subsidiaries		(4,875	)		—			—			—			4,875			—
Proceeds from sale of property, plant and equipment		—			—			165			4			—			169
Net cash provided by (used in) investing activities		(4,875	)		—			(8,103	)		(33	)		4,875			(8,136	)
Cash flows from financing activities
Borrowings on ABL Facility		—			229,787			—			—			—			229,787
Payments on ABL Facility		—			(188,309	)		—			—			—			(188,309	)
Distribution to stockholder		—			—			—			(2,000	)		2,000			—
Net payments (amounts due) from stockholder		4,875			—			—			—			—			4,875
Net cash provided by (used in) financing activities		4,875			41,478			—			(2,000	)		2,000			46,353
Effect of foreign currency exchange rate changes		—			—			—			(141	)		—			(141	)
Net increase (decrease) in cash		—			25,920			—			(1,239	)		(4,533	)		20,148
Cash at beginning of period		—			8,537			—			5,446			(121	)		13,862
Cash at end of period	$	—		$	34,457		$	—		$	4,207		$	(4,654	)	$	34,010

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Global Brass and Copper Holdings, Inc.

Notes to Consolidated Financial Statements (Unaudited)

(All amounts in thousands, except share and per share data)

	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities
Net cash provided by (used for) operating activities	$	73,624		$	25,672		$	6,649		$	(999	)	$	(74,609	)	$	30,337
Cash flows from investing activities
Capital expenditures		—			(549	)		(6,655	)		(18	)		—			(7,222	)
Capital distributions from subsidiary		86,376			—			—						(86,376	)		—
Payable to subsidiaries		2,161			—			—			—			(2,161	)		—
Proceeds from sale of property, plant and equipment		—			—			6			—			—			6
Net cash provided by (used in) investing activities		88,537			(549	)		(6,649	)		(18	)		(88,537	)		(7,216	)
Cash flows from financing activities
Deferred financing fees		—			(12,926	)		—			—			—			(12,926	)
Proceeds from senior secured notes		—			375,000			—			—			—			375,000
Payments on term loan		—			(310,875	)		—			—			—			(310,875	)
Borrowings on ABL Facility		—			81,586			—			—			—			81,586
Payments on ABL Facility		—			(30,913	)		—			—			—			(30,913	)
Distribution to stockholder		(160,000	)		(160,000	)		—			—			160,000			(160,000	)
Amounts due from stockholder		(2,161	)		—			—			—			—			(2,161	)
Net cash used in financing activities		(162,161	)		(58,128	)		—			—			160,000			(60,289	)
Effect of foreign currency exchange rate changes		—			—			—			(207	)		—			(207	)
Net decrease in cash		—			(33,005	)		—			(1,224	)		(3,146	)		(37,375	)
Cash at beginning of period		—			45,302			—			4,648			(413	)		49,537
Cash at end of period	$	—		$	12,297		$	—		$	3,424		$	(3,559	)	$	12,162

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CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

This report contains “forward-looking statements” that involve risks and uncertainties. You can identify forward-looking statements because they contain words such as “believes”, “expects”, “projects”, “may”, “would”, “should”, “seeks”, “approximately”, “intends”, “plans”, “estimates”, “anticipates” or similar expressions that relate to our strategy, plans or intentions. All statements we make relating to our estimated and projected earnings, margins, costs, expenditures, cash flows, growth rates and financial results or to our expectations regarding future industry trends are forward-looking statements. In addition, we, through our senior management, from time to time make forward-looking public statements concerning our expected future operations and performance and other developments. These forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may change at any time, and, therefore, our actual results may differ materially from those that we expected. We derive many of our forward-looking statements from our operating budgets and forecasts, which are based upon many detailed assumptions. While we believe that our assumptions are reasonable, we caution that it is very difficult to predict the impact of known factors, and, of course, it is impossible for us to anticipate all factors that could affect our actual results. All forward-looking statements contained in this report are based upon information available to us on the date of this report. Important factors that could cause actual results to differ materially from our expectations, which we refer to as “cautionary statements”, are disclosed under the “Risk Factors” sections in our Amendment No. 9 to Form S-1 Registration Statement filed with the Securities and Exchange Commission on May 22, 2013, in Item 1A “Risk Factors” and elsewhere in this Report on Form 10-Q, including, without limitation, in conjunction with the forward-looking statements included in this Report on Form 10-Q. All forward-looking information in this report and subsequent written and oral forward-looking statements attributable to us, or persons acting on our behalf, are expressly qualified in their entirety by the cautionary statements. Some of the factors that we believe could affect our results include:

• general economic conditions affecting the markets in which our products are sold;

• our ability to implement our business strategies, including acquisition activities;

• our ability to continue implementing our balanced book approach to substantially reduce the impact of fluctuations in metal prices on our earnings and operating margins;

• shrinkage from processing operations and metal price fluctuations, particularly copper;

• the condition of various markets in which our customers operate, including the housing and commercial construction industries;

• our ability to maintain business relationships with our customers on favorable terms;

• our ability to compete effectively with existing and new competitors;

• limitations on our ability to purchase raw materials, particularly copper;

• fluctuations in commodity and energy prices and costs;

• our ability to maintain sufficient liquidity as commodity and energy prices rise;

• the effects of industry consolidation or competition in our business lines;

• operational factors affecting the ongoing commercial operations of our facilities, including technology failures, catastrophic weather-related damage, regulatory approvals, permit issues, unscheduled blackouts, outages or repairs or unanticipated changes in energy costs;

• supply, demand, prices and other market conditions for our products;

• our ability to accommodate increases in production to meet demand for our products;

• our ability to continue our operations internationally and the risks applicable to international operations;

• government regulations relating to our products and services, including new legislation relating to derivatives and the elimination of the dollar bill;

• our ability to maintain effective internal control over financial reporting as we become subject to public company requirements;

• our ability to realize the planned cost savings and efficiency gains as part of our various initiatives;

• workplace safety issues;

• our ability to retain key employees;

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• adverse developments in our relationship with our employees or the future terms of our collective bargaining agreements;

• rising employee medical costs;

• environmental costs;

• our exposure to product liability claims;

• our ability to maintain cost-effective insurance policies;

• our ability to maintain the confidentiality of our proprietary information and to protect the validity, enforceability or scope of our intellectual property rights;

• our limited experience managing and operating a public company;

• our ability to service our substantial indebtedness;

• fluctuations in interest rates; and

• restrictive covenants in our indebtedness that may adversely affect our operational flexibility.

We caution you that the foregoing list of factors may not contain all of the material factors that are important to you. In addition, in light of these risks and uncertainties, the matters referred to in the forward-looking statements contained in this report may not in fact occur. Accordingly, investors should not place undue reliance on those statements. We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law.

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Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of financial condition and results of operations should be read in conjunction with our consolidated financial statements and related notes included elsewhere in this filing. In addition to historical data, this discussion contains forward-looking statements about our business, operations and financial performance based on current expectations that involve risks, uncertainties and assumptions. Our actual results may differ materially from those discussed in the forward-looking statements as a result of various factors, including but not limited to those discussed in the section entitled “Cautionary Statement Concerning Forward-Looking Statements” included elsewhere in this report.

Overview

Our Business

We are a leading value-added converter, fabricator, distributor and processor of specialized copper and brass products in North America. We offer a broad range of products, and we sell our products to multiple distinct end markets including the building and housing, munitions, automotive, transportation, coinage, electronics/electrical components, industrial machinery and equipment and general consumer end markets. Unlike other metals companies who may engage in mining, smelting and refining activities, we are purely a metal converter, fabricator, distributor and processor and do not attempt to generate profits from fluctuations in metal prices. We engage in melting and casting, rolling, drawing, extruding and stamping to manufacture finished and semi-finished alloy products from processed scrap, copper cathode and other refined metals. We participate in two distinct segments of the fabrication value chain: sheet, strip, foil, tube and plate and alloy rod.

Our leading market positions in each of our operating segments allow us to achieve attractive operating margins. Our strong operating margins are a function of four key characteristics of our business: (1) we earn a premium margin over the cost of metal because of our value-added processing capabilities, patent-protected technologies, and first-class service; (2) we have strategically shifted our product portfolio toward value-added, higher margin products; (3) we are driving a lean cost structure through fixed and variable cost reductions, process improvements, and workforce flexibility initiatives; and (4) we employ our balanced book approach (as discussed below) to substantially reduce the financial impact of metal price volatility on our earnings and operating margins. We have undertaken substantial cost reduction activities since our formation in 2007, which have reduced our fixed costs, improved our net working capital balances and improved our competitive positioning while increasing operating margins.

Our Operating Segments

We operate through three reportable operating segments: Olin Brass, Chase Brass and A.J. Oster.

Our Olin Brass segment is the leading manufacturer and converter of copper and copper-alloy sheet, strip, foil, tube and fabricated components in North America. While primarily processing copper and copper-alloys, the segment also rerolls and forms other metals such as stainless and carbon steel. Olin Brass’s products are used in five primary end markets: building and housing, munitions, automotive, coinage, and electronics/electrical components. For each of the past three years ended December 31, 2012, between 14% and 18% of Olin Brass’s products have been sold to A.J. Oster.

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Chase Brass is a leading North American manufacturer of brass rod. The segment principally produces brass rod in sizes ranging from 1/4 inch to 4.5 inches in diameter. The key attributes of brass rod include its machinability, corrosion resistance and moderate strength, making it ideal for forging and machining products such as valves and fittings. Chase Brass produces brass rod used in production applications which can be grouped into four end markets: building and housing, transportation, electronics/electrical components and industrial machinery and equipment.

Our A.J. Oster segment is a leading copper-alloy distributor and processor. The segment, through its family of metal service centers, is strategically focused on satisfying its customers’ needs for brass and copper strip and other products, with a high level of service, quality and flexibility by offering customization and just-in-time delivery. Our value-added processing services include precision slitting and traverse winding to provide greater customer press up-time, hot air level tinning for superior corrosion resistance and product enhancements such as edging and cutting. Important A.J. Oster end markets include building and housing, automotive and electronics/electrical components (primarily for housing and commercial construction). For each of the past three years ended December 31, 2012, between 70% and 80% of A.J. Oster’s material requirements have been supplied by our Olin Brass segment.

All three segments generate revenue from product sales and earn a premium margin over the cost of metal as a result of our value-added processing and metal conversion capabilities and first-class service. Our financial performance is driven by metal conversion economics, not by the underlying movements in the price of copper and the other metal we use. In all three segments, most of the risk of changes in the metal cost of the products we make is borne by our customers or third parties rather than by us.

We also have a Corporate and Other segment, which includes compensation for corporate executives and officers, corporate office and administrative salaries, and professional fees for accounting, tax and legal services. The Corporate and Other segment also includes interest expense, state and Federal income taxes, overhead costs that management has not allocated to our operating segments and the elimination of intercompany balances.

Refinancing Activities

In June 2012, we amended and extended the agreement governing the asset-based revolving loan facility to mature on June 1, 2017 and increased the commitments under the facility to $200.0 million, which we refer to as the “ABL Facility.” On June 1, 2012, we completed a refinancing, which included Global Brass and Copper, Inc.’s (“GBC”) issuance of $375.0 million in aggregate principal amount of 9.50% Senior Secured Notes due 2019 (the “Senior Secured Notes”). The Senior Secured Notes mature on June 1, 2019. Interest on the Senior Secured Notes accrues at the rate of 9.50% per annum and is payable semiannually in arrears on June 1 and December 1, commencing on December 1, 2012. The Senior Secured Notes are guaranteed by Global Brass and Copper Holdings, Inc. (“Holdings” or the “Company”) and substantially all of GBC’s existing and future wholly-owned U.S. subsidiaries. The Senior Secured Notes are secured by a senior-priority security interest in our fixed assets and by a junior-priority security interest in our accounts receivable and inventory. We used a portion of the proceeds from the Senior Secured Notes to repay in full the $266.5 million of principal outstanding under our senior secured term loan credit facility (the “Term Loan Facility”), which we refer to as the “Term Loan Refinancing”. In the Term Loan Refinancing, we paid our lenders a total of $275.5 million, including the $266.5 million of principal, an early repayment premium of $8.0 million and accrued and unpaid interest of $1.0 million, and we recognized a $19.6 million loss on extinguishment of debt.

In connection with the offering of the Senior Secured Notes, the Term Loan Refinancing and the amendment of the ABL Facility, we used a portion of the net proceeds of the issuance of the Senior Secured Notes, together with cash on hand, to make a cash distribution of $160.0 million to Halkos Holdings, LLC (“Halkos”), the sole stockholder of the Company prior to the Company’s initial public offering (the “IPO”), which we refer to as the “Parent Distribution.” Halkos distributed the proceeds of the Parent Distribution pro rata to its equityholders (which include certain of our officers and directors) in accordance with the terms of its operating agreement.

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Initial Public Offering of Holdings

On May 29, 2013, the Company completed its initial public offering of 8,050,000 shares of its common stock at a price of $11.00 per share. The shares began trading on the New York Stock Exchange on May 23, 2013 under the ticker symbol “BRSS.” Halkos, the sole stockholder of Holdings prior to the IPO, sold all of the shares in the initial public offering and received all of the net proceeds from the offering. After giving effect to the offering, Halkos beneficially owns approximately 61.5% of the outstanding common stock of Holdings as of June 30, 2013.

Key Factors Affecting Our Results of Operations

Balanced Book

Most of our sales volume is from non-toll customers. During the fiscal year ended December 31, 2012, non-toll sales accounted for 75.9% of our volume. To substantially reduce the financial impact of metal price volatility on earnings and operating margins, we use our balanced book approach for nontoll sales to offset forward metal sales with forward metal purchases. Using our balanced book approach, we seek to minimize the financial impact of metal price movements in the period between date of order and date of shipment by matching the timing, quantity and price of the metal component of net sales made on a non-toll basis with the timing, quantity and price of the replacement metal purchases. Our balanced book approach has improved the consistency of our margins despite underlying copper price volatility.

For any non-toll sale we achieve our balanced book through one of the following three mechanisms:

• Metal sales and replacement purchases on “price date of shipment” terms, meaning that metal sale prices and the metal replacement prices are set on the date of shipment. The customer bears the risk of metal price changes from the date of order to the date of shipment, so all fluctuations in metal costs are passed through to the customer.

• Metal sales and replacement purchases on a “firm price basis”, meaning that metal sale prices are fixed on the order date, and a matching replacement purchase at a fixed price is established with a metal supplier. The supplier therefore bears the risk of metal price changes from the date of order to the date of shipment.

• Metal sales on a firm price basis in circumstances where a matching firm price purchase is unavailable. In this situation, we execute a forward purchase on “price date of shipment” terms and enter into a financial derivative transaction in the form of a forward purchase contract. The impact of price changes from date of order to the date of shipment on the previously required metal replacement purchase is offset by gains or losses on the derivative contract. The derivative counterparty bears the risk of metal price changes from the date of order to the date of shipment.

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Non-GAAP Measures

In addition to the results reported in accordance with U.S. GAAP, we have provided information regarding “Consolidated EBITDA”, “Segment EBITDA”, “Consolidated Adjusted EBITDA”, “Segment Adjusted EBITDA”, and “Adjusted sales,” each of which are defined below.

EBITDA-Based Measures

We define Consolidated EBITDA as net income (loss) attributable to Global Brass and Copper Holdings, Inc., adjusted to exclude interest expense, provision for (benefit from) income taxes and depreciation and amortization expense. Segment EBITDA is defined by us as income (loss) before provision for (benefit from) income taxes and equity income, adjusted to exclude interest expense and depreciation and amortization expense, in each case, to the extent such items are attributable to such segment.

We use Consolidated EBITDA only to calculate Consolidated Adjusted EBITDA. Consolidated Adjusted EBITDA is Consolidated EBITDA, further adjusted to exclude extraordinary gains from the bargain purchase that occurred in the acquisition of the worldwide metals business of Olin Corporation, realized and unrealized gains and losses related to the collateral hedge contracts that were previously required under our former ABL Facility, unrealized gains and losses on derivative contracts in support of our balanced book approach, unrealized gains and losses associated with derivative contracts related to electricity and natural gas costs, non-cash gains and losses due to lower of cost or market adjustments to inventory, non-cash LIFO-based gains and losses due to the depletion of a LIFO layer of metal inventory, non-cash compensation expense related to payments made to members of our management by our parent, Halkos, share-based compensation expense, loss on extinguishment of debt, non-cash income accretion related to the joint venture with Dowa, KPS management fees, restructuring and other business transformation charges, specified legal and professional expenses and certain other items.

We use Segment EBITDA only to calculate Segment Adjusted EBITDA. Segment Adjusted EBITDA is Segment EBITDA, further adjusted to exclude unrealized gains and losses on derivative contracts in support of our balanced book approach, unrealized gains and losses associated with derivative contracts related to electricity and natural gas costs, non-cash gains and losses due to lower of cost or market adjustments to inventory, non-cash LIFO-based gains and losses due to the depletion of a LIFO layer of metal inventory, non-cash compensation expense related to payments made to certain employees by our parent, Halkos, share-based compensation expense, loss on extinguishment of debt, and non-cash income accretion related to the joint venture with Dowa, in each case, to the extent such items are attributable to the relevant segment.

We present the above-described EBITDA-based measures because we consider them important supplemental measures and believe they are frequently used by securities analysts, investors and other interested parties in the evaluation of companies in our industry. Nevertheless, our EBITDA-based measures may not be comparable to similarly titled measures presented by other companies.

We present Consolidated Adjusted EBITDA as a supplemental measure of our performance because we believe it represents a meaningful presentation of the financial performance of our core operations, without the impact of the various items excluded, in order to provide period-to-period comparisons that are more consistent and more easily understood. Management uses Consolidated Adjusted EBITDA per pound in order to measure the effectiveness of the balanced book approach in reducing the financial impact of metal price volatility on earnings and operating margins, and to measure the effectiveness of our business transformation initiatives in improving earnings and operating margins. In addition, Segment Adjusted EBITDA is the key metric used by our chief operating decision-maker to evaluate the business performance of our segments in comparison to budgets, forecasts and prior-year financial results, providing a measure that

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management believes reflects our core operating performance. Measures similar to Consolidated Adjusted EBITDA, namely “EBITDA” and “Adjusted EBITDA”, are defined and used in the agreements governing the ABL Facility and the Senior Secured Notes to determine compliance with various financial covenants and tests.

Our EBITDA-based measures have limitations as analytical tools, and you should not consider them in isolation or as substitutes for analysis of our results as reported under U.S. GAAP. Some of these limitations are:

• they do not reflect every expenditure, future requirements for capital expenditures or contractual commitments;

• they do not reflect the significant interest expense or the amounts necessary to service interest or principal payments on our debt;

• they do not reflect income tax expense, and because the payment of taxes is part of our operations, tax expense is a necessary element of our costs and ability to operate;

• although depreciation and amortization are eliminated in the calculation of EBITDA-based measures, the assets being depreciated and amortized will often have to be replaced or require improvements in the future, and our EBITDA-based measures do not reflect any costs of such replacements or improvements;

• they do not reflect the impact of earnings or charges resulting from matters we consider not to be indicative of our ongoing operations;

• segment-based measures do not reflect the elimination of intercompany transactions, including those between Olin Brass and A.J. Oster;

• they do not reflect limitations on our costs related to transferring earnings from our subsidiaries to us; and

• other companies in our industry may calculate these measures differently from the way we do, limiting their usefulness as comparative measures.

We compensate for these limitations by using our EBITDA-based measures along with other comparative tools, together with GAAP measurements, to assist in the evaluation of operating performance. Such GAAP measurements include operating income (loss), net income (loss), cash flows from operations and other cash flow data. We have significant uses of cash, including capital expenditures, interest payments, debt principal repayments, taxes and other non-recurring charges, which are not reflected in our EBITDA-based measures.

Our EBITDA-based measures are not intended as alternatives to net income (loss) as indicators of our operating performance, as alternatives to any other measure of performance in conformity with GAAP or as alternatives to cash flow provided by operating activities as measures of liquidity. You should therefore not place undue reliance on our EBITDA-based measures or ratios calculated using those measures. Our GAAP-based measures can be found in our consolidated financial statements and the related notes thereto included elsewhere in this report.

Adjusted Sales

Adjusted sales is defined as net sales less the metal component of net sales. Net sales is the most directly comparable GAAP measure to adjusted sales. Adjusted sales represents the value-added premium we earn over our conversion and fabrication costs. Management uses adjusted sales on a consolidated basis to monitor the revenues that are generated from our value-added conversion and fabrication processes excluding the effects of fluctuations in metal costs, reflecting our toll sales and our balanced book approach for non-toll sales. We believe that adjusted sales supplements our GAAP results to provide a more complete understanding of the results of our business, and we believe it is useful to our investors and other parties for these same reasons. Adjusted sales may not be comparable to similarly titled measures presented by other companies and is not a measure of operating performance or liquidity defined by GAAP.

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Revision of Prior Period Financial Statements

Our financial information as of and for the three months and six months ended June 30, 2012 in this discussion and analysis reflects those revisions disclosed in note 1, “Basis of Presentation and Principles of Consolidation” to our unaudited consolidated financial statements included elsewhere in this report.

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Results of Operations

Consolidated Results of Operations for the Three Months Ended June 30, 2013, Compared to the Three Months Ended June 30, 2012.

													Change:
	Three Months Ended June 30,												2013 vs. 2012
(in millions)	2013			% of Net Sales			2012			% of Net Sales			Amount			Percent
Net sales	$	461.5			100.0	%	$	417.0			100.0	%	$	44.5			10.7	%
Cost of sales		409.8			88.8	%		369.9			88.7	%		39.9			10.8	%
Gross profit		51.7			11.2	%		47.1			11.3	%		4.6			9.8	%
Selling, general and administrative expenses (a)		52.8			11.4	%		38.0			9.1	%		14.8			38.9	%
Operating (loss) income		(1.1	)		(0.2	%)		9.1			2.2	%		(10.2	)		(112.1	%)
Interest expense		10.0			2.2	%		10.2			2.4	%		(0.2	)		(2.0	%)
Loss on extinguishment of debt		—			0.0	%		19.6			4.7	%		(19.6	)		(100.0	%)
Other expense, net		—			0.0	%		0.4			0.1	%		(0.4	)		(100.0	%)
Loss before provision for (benefit from) income taxes and equity income		(11.1	)		(2.4	%)		(21.1	)		(5.1	%)		10.0			(47.4	%)
Provision for (benefit from) income taxes		6.5			1.4	%		(1.0	)		(0.2	%)		7.5			(750.0	%)
(Loss) income before equity income		(17.6	)		(3.8	%)		(20.1	)		(4.8	%)		2.5			(12.4	%)
Equity income, net of tax		0.5			0.1	%		0.2			0.0	%		0.3			150.0	%
Net loss		(17.1	)		(3.7	%)		(19.9	)		(4.8	%)		2.8			(14.1	%)
Less: Net income attributable to noncontrolling interest		—			0.0	%		0.1			0.0	%		(0.1	)		(100.0	%)
Net loss attributable to Global Brass and Copper Holdings, Inc.	$	(17.1	)		(3.7	%)	$	(20.0	)		(4.8	%)	$	2.9			(14.5	%)
Consolidated Adjusted EBITDA	$	36.3			7.9	%	$	31.2			7.5	%		5.1			16.3	%

(a) Amounts include non-cash profits interest compensation expense of $29.3 million and $19.5 million for the three months ended June 30, 2013 and 2012, respectively.

Net Sales

Net sales increased by $44.5 million, or 10.7%, from $417.0 million for the three months ended June 30, 2012 to $461.5 million for the three months ended June 30, 2013. Net sales increased by $22.2 million due to an increase in volume and $41.4 million as a result of the sales of unprocessed metal in the three months ended June 30, 2013. These increases were partially offset by lower metal prices and lower average sales prices, which decreased net sales by $17.9 million and $1.2 million, respectively. Metal prices reflect the replacement cost recovery from the customer, whereas the sales prices represent the pricing component of adjusted sales, which we define as the excess of net sales over the metal component of net sales.

Volume increased by 9.6 million pounds, or 7.5%, from 128.8 million pounds for the three months ended June 30, 2012 to 138.4 million pounds for the three months ended June 30, 2013. The increase in volume was the result of higher demand in the building and housing end market and higher demand in the munitions and coinage end markets. These increases were partially offset by lower demand in the electronics/electrical components end market and increased competition from foreign imports.

46

The metal cost recovery component of net sales increased by $36.9 million, or 13.1%, from $282.3 million for the three months ended June 30, 2012 to $319.2 million for the three months ended June 30, 2013.

Higher volume increased the metal cost recovery component of net sales by $13.4 million. Additionally, sales of unprocessed metal increased the metal cost recovery component of net sales by $41.4 million in the three months ended June 30, 2013. Partially offsetting the increase in the metal cost recovery component of net sales was the change in customer mix and lower metal prices which decreased the metal cost recovery component of net sales by $17.9 million. The metal component of net sales per pound of finished product shipped increased by 5.5%, due primarily to the inclusion of the sale of unprocessed metal, the quantity of which is not included in pounds shipped. The metal component of net sales per pound of finished product sold excluding the sale of unprocessed metal (the quantity of which is not included in pounds shipped) decreased by 8.4%, primarily as a result of an 8.5% decrease in average daily copper prices reported by COMEX.

Adjusted Sales

Adjusted sales, the excess of net sales over the metal cost recovery component of net sales, increased by $7.6 million, or 5.6%, from $134.7 million for the three months ended June 30, 2012 to $142.3 million for the three months ended June 30, 2013. Higher volume increased adjusted sales by $8.8 million, partially offset by lower average sales prices, which decreased adjusted sales by $1.2 million. Adjusted sales per pound decreased in the three months ended June 30, 2013 by 2.9% compared to the same period in 2012 which was the result of the shift in product mix within each segment as well as the effect of changes in the mix of sales by segment relative to our consolidated sales as a whole, partially offset by a net increase in average sales prices at the segment level.

Adjusted sales is a non-GAAP financial measure. See “—Non-GAAP Measures—Adjusted Sales”. The following table presents a reconciliation of net sales to adjusted sales and net sales per pound to adjusted sales per pound:

	Three Months Ended June  30,				Change: 2013 vs. 2012
(in millions, except per pound values)	2013		2012		Amount			Percent
Pounds shipped		138.4		128.8		9.6			7.5	%
Net sales	$	461.5	$	417.0	$	44.5			10.7	%
Metal component of net sales		319.2		282.3		36.9			13.1	%
Adjusted sales	$	142.3	$	134.7	$	7.6			5.6	%
$ per pound shipped
Net sales per pound	$	3.33	$	3.24	$	0.09			2.8	%
Metal component of net sales per pound		2.31		2.19		0.12			5.5	%
Adjusted sales per pound	$	1.02	$	1.05	$	(0.03	)		(2.9	%)
Average copper price per pound reported by COMEX	$	3.25	$	3.55	$	(0.30	)		(8.5	%)

Gross Profit

Gross profit increased by $4.6 million, or 9.8%, from $47.1 million for the three months ended June 30, 2012 to $51.7 million for the three months ended June 30, 2013. Gross profit per pound remained flat at $0.37 for the three months ended June 30, 2013 as compared to the same period in 2012.

47

Gross profit for the three months ended June 30, 2013 included a loss of $41 thousand related to net unrealized losses on derivative contracts and a $0.3 million non-cash lower of cost or market charge for the write down of inventory. Gross profit for the three months ended June 30, 2012 included a loss of $0.1 million related to net unrealized losses on derivative contracts. We exclude the above items in calculating Segment Adjusted EBITDA and Consolidated Adjusted EBITDA. See “—Non-GAAP Measures—EBITDA-Based Measures”.

Depreciation expense included in gross profit increased from $1.5 million for the three months ended June 30, 2012 to $1.8 million for the three months ended June 30, 2013. The increase is attributable to an increase in our depreciable asset base from $74.2 million at June 30, 2012 to $95.4 million at June 30, 2013.

Several other factors contributed to the remaining $5.1 million increase in gross profit. Higher volume, lower shrinkage costs due to lower metal costs and higher yields, as well as lower manufacturing conversion costs in the three months ended June 30, 2013 contributed $3.1 million, $1.8 million and $1.4 million, respectively, to the increase in gross profit. These increases were offset by lower average sale prices of $1.2 million in the three months ended June 30, 2013.

Selling, General and Administrative Expenses

Selling, general and administrative expenses increased by $14.8 million, or 38.9%, from $38.0 million for the three months ended June 30, 2012 to $52.8 million for the three months ended June 30, 2013.

Non-cash compensation charges for vested profits interest shares included in selling, general and administrative expenses were $8.9 million and $19.5 million for the three months ended June 30, 2013 and 2012, respectively. Additionally, in the three months ended June 30, 2013, Halkos modified the Halkos Equity Plan to eliminate its right to acquire all or a portion of non-voting membership interests to select members of the Company’s management (entitled “Class B Shares”) for less than fair market value under certain conditions. The Class B Shares are profits interests in Halkos. This modification to the Halkos Equity Plan triggered the recognition of $20.4 million of incremental non-cash compensation expense.

During the three months ended June 30 2013, in connection with the IPO, the Company terminated its Management Services Agreement with affiliates of KPS Funds prior to the expiration of the initial term and was required to pay an early termination fee equal to the value of the advisory fee that would have otherwise been payable to affiliates of KPS Funds through the end of the Management Services Agreement. The Company paid affiliates of KPS Funds $4.5 million related to the Company’s early termination and all unpaid management advisory fees and recorded the charges in selling, general and administrative expenses. The management advisory fees for the three months ended June 30, 2012 were $0.3 million.

The Company incurred professional fees for accounting, tax, legal and consulting services related to the Company’s IPO efforts of $0.8 million and $0.5 million during the three months ended June 30, 2013 and 2012, respectively. Additionally, for the three months ended June 30, 2013, the Company recognized $0.2 million related to share-based compensation resulting from the grant of non-qualified stock options, restricted stock and performance-based shares to certain members of the Company’s management and its Board of Directors in connection with the IPO.

Several other offsetting factors contributed to the remaining $0.3 million increase in selling, general and administrative expenses in the three months ended June 30, 2013 as compared to the same period in 2012. Salaries, benefits and incentive compensation increased by $0.5 million, which was in support of our business strategy, partially offset by a $0.2 million decrease in other miscellaneous selling, general and administrative expenses.

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Operating (Loss) Income

Operating (loss) income decreased by $10.2 million, or 112.1%, from income of $9.1 million for the three months ended June 30, 2012 to a loss of $1.1 million for the three months ended June 30, 2013 due to the changes in gross profit and selling, general and administrative expenses described above.

Interest Expense

Interest expense decreased by $0.2 million from $10.2 million for the three months ended June 30, 2012 to $10.0 million for the three months ended June 30, 2013. The decrease was due to a decrease in amortization of debt discount and debt issuance costs and lower interest rates (a weighted average of 9.33% per annum during the second quarter of 2013 compared to 9.54% per annum during the second quarter of 2012) and was partially offset by higher average borrowings on our debt facilities of $385.8 million as compared to $328.3 million in 2012.

The following table summarizes the components of interest expense:

	Three Months Ended June 30,
(in millions)	2013		2012
Interest on principal	$	9.1	$	7.9
Amortization of debt discount and issuance costs		0.6		2.0
Other borrowing costs (a)		0.3		0.3
Interest expense	$	10.0	$	10.2

(a) Includes fees related to letters of credit and unused line of credit fees.

Loss on Extinguishment of Debt

In connection with the termination prior to maturity of the senior secured term loan, we recognized $19.6 million as loss from extinguishment of debt for the three months ended June 30, 2012. The loss on extinguishment of debt includes $7.1 million of unamortized debt issuance costs and $4.9 million of unamortized debt discount as well as $6.4 million of call premium and $0.1 million of professional service fees related to the early termination. Additionally, $1.1 million of costs associated with the issuance of the Senior Secured Notes was expensed as incurred in accordance with ASC 470-50, Modifications and Extinguishments.

Other Expense, Net

Other expense, net was $0.4 million for the three months ended June 30, 2012, which primarily related to a call premium of $0.5 million resulting from a voluntary prepayment of $15.0 million on our senior secured loan in April 2012.

Provision for (Benefit from) Income Taxes

The Company recognized a provision for income taxes of $6.5 million for the three months ended June 30, 2013 compared to a benefit from income taxes of $1.0 million for the three months ended June 30, 2012. The change in the provision for income taxes was primarily due to the decrease in the loss before provision for (benefit from) income taxes and equity income of $10.0 million for the three months ended June 30, 2013 as compared to the same period in 2012, as well as the increase in non-deductible non-cash compensation of $9.8 million for the three months ended June 30, 2013, as compared to the same period in 2012. The effective income tax rate was negative 58.1% and 4.6% for the three months ended June 30, 2013 and 2012, respectively, which was primarily due to the aforementioned non-deductible non-cash compensation of $29.3 million and $19.5 million in the three months ended June 30, 2013 and 2012, respectively.

49

The following table summarizes the effective income tax rate components for the three months ended June 30, 2013 and 2012, respectively:

	Three Months Ended June 30,
	2013			2012
Statutory provision rate		35.0	%		35.0	%
Permanent differences and other items
State tax provision		(5.4	%)		4.0	%
Section 199 manufacturing credit		5.0	%		(1.7	%)
Return to provision adjustments / Uncertain tax positions		0.6	%		3.1	%
Non-deductible non-cash compensation		(92.0	%)		(36.2	%)
Other		(1.3	%)		0.4	%
Effective income tax rate		(58.1	%)		4.6	%

Equity Income, net of tax

Equity income, net of tax, increased by $0.3 million, from $0.2 million for the three months ended June 30, 2012, to $0.5 million for the three months ended June 30, 2013.

Net Loss Attributable to Global Brass and Copper Holdings, Inc.

Net loss attributable to Global Brass and Copper Holdings, Inc. decreased by $2.9 million, or 14.5%, from $20.0 million for the three months ended June 30, 2012, to $17.1 million for the three months ended June 30, 2012 mainly due to the loss on extinguishment of debt in 2012 as described above, offset by the increase in selling, general and administrative expenses and an increase in the provision for income taxes, both of which are described above.

Consolidated Adjusted EBITDA

Consolidated Adjusted EBITDA increased by $5.1 million, or 16.3%, from $31.2 million for the three months ended June 30, 2012 to $36.3 million for the three months ended June 30, 2013. The increase was due to higher volume of $3.1 million, lower shrinkage costs due to lower metal costs and higher yields of $1.8 million, lower manufacturing conversion costs of $1.4 million, an increase in other adjustments included in the calculation of Consolidated Adjusted EBITDA of $0.3 million and a $0.2 million decrease in other miscellaneous selling, general and administrative expenses. Partially offsetting the increase was lower average selling prices of $1.2 million and an increase in salaries, benefits and incentive compensation of $0.5 million.

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Consolidated EBITDA and Consolidated Adjusted EBITDA are non-GAAP financial measures. See “—Non-GAAP Measures—EBITDA-Based Measures”.

Below is a reconciliation of net loss attributable to Global Brass and Copper Holdings, Inc. to Consolidated EBITDA and Consolidated Adjusted EBITDA for the three months ended June 30, 2013 and 2012:

	Three Months Ended June 30,
(in millions)	2013			2012
Net loss attributable to Global Brass and Copper Holdings, Inc.	$	(17.1	)	$	(20.0	)
Interest expense		10.0			10.2
Provision for (benefit from) income taxes		6.5			(1.0	)
Depreciation expense		2.0			1.6
Amortization expense		—			0.1
Consolidated EBITDA	$	1.4		$	(9.1	)
Loss on derivative contracts (a)		—			0.1
Non-cash accretion of income of Dowa joint venture (b)		(0.2	)		(0.2	)
Loss on extinguishment of debt (c)		—			19.6
Non-cash Halkos profits interest compensation expense (d)		29.3			19.5
Management fees (e)		4.5			0.3
Specified legal/professional expenses (f)		0.8			0.5
Lower of cost or market adjustment to inventory (g)		0.3			—
Share-based compensation expense (h)		0.2			—
Other adjustments (i)		—			0.5
Consolidated Adjusted EBITDA	$	36.3		$	31.2

(a) Represents unrealized gains and losses on derivative contracts in support of our balanced book approach and unrealized gains and losses associated with derivative contracts with respect to electricity and natural gas costs.

(b) As a result of the application of purchase accounting in connection with the November 2007 acquisition, no carrying value was initially assigned to our equity investment in our joint venture with Dowa. This adjustment represents the accretion of equity in our joint venture with Dowa at the date of the acquisition over a 13-year period (which represents the estimated useful life of the technology and patents of the joint venture). See note 5 to our unaudited consolidated financial statements, which are included elsewhere in this report.

(c) Represents the loss on the extinguishment of debt recognized in connection with the termination prior to maturity of the senior secured term loan.

(d) The 2013 amount includes $20.4 million that represents incremental non-cash compensation as a result of the modification made to the Halkos Equity Plan to eliminate Halkos’ right to acquire all or a portion of the Class B Shares for less than fair market value upon certain conditions. The 2013 amount also includes $8.9 million that represents dividend payments made by Halkos to members of our management that resulted in a non-cash compensation charge in connection with the IPO that occurred in May 2013. See note 14 to our unaudited consolidated financial statements, which are included elsewhere in this report. The 2012 amount represents the dividend payment made by Halkos to members of our management that resulted in a non-cash compensation charge in connection with the Parent Distribution that occurred on June 1, 2012. See note 14 to our unaudited consolidated financial statements, which are included elsewhere in this report.

(e) The 2013 amount represents an early termination fee equal to the value of the advisory fee that would have otherwise been payable to affiliates of KPS through the end of the agreement. The 2012 amount represents a portion of the annual advisory fees payable to affiliates of KPS. See note 12 to our unaudited consolidated financial statements, which are included elsewhere in this report.

(f) Specified legal/professional expenses for the three months ended June 30, 2013 and 2012 included $0.8 million and $0.5 million, respectively, of professional fees for accounting, tax, legal and consulting services related to the IPO and certain regulatory and compliance matters.

(g) Represents a non-cash lower of cost or market charge for the write down of inventory recorded during the three months ended June 30, 2013.

(h) Represents share-based compensation expense resulting from the grant of non-qualified stock options, restricted stock and performance-based shares to certain members of the Company’s management and its Board of Directors in connection with the IPO.

(i) Represents a call premium of $0.5 million as a result of a voluntary prepayment of $15.0 million on our senior secured loan in April 2012.

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Segment Results of Operations

Segment Results of Operations for the Three Months Ended June 30, 2013, Compared to the Three Months Ended June 30, 2012.

	Three Months Ended June 30,						Change 2013 vs. 2012
(in millions)	2013			2012			Amount			Percent
Pounds shipped
Olin Brass		73.8			68.7			5.1			7.4	%
Chase Brass		58.1			54.9			3.2			5.8	%
A.J. Oster		17.1			17.6			(0.5	)		(2.8	%)
Corporate & other (a)		(10.6	)		(12.4	)		1.8			(14.5	%)
Total		138.4			128.8			9.6			7.5	%
Net Sales
Olin Brass	$	230.7		$	178.6		$	52.1			29.2	%
Chase Brass		164.7			166.1			(1.4	)		(0.8	%)
A.J. Oster		80.3			85.3			(5.0	)		(5.9	%)
Corporate & other (a)		(14.2	)		(13.0	)		(1.2	)		9.2	%
Total	$	461.5		$	417.0		$	44.5			10.7	%
Segment Adjusted EBITDA
Olin Brass	$	16.2		$	13.0		$	3.2			24.6	%
Chase Brass		19.0			17.3			1.7			9.8	%
A.J. Oster		4.3			5.2			(0.9	)		(17.3	%)
Total for operating segments	$	39.5		$	35.5		$	4.0			11.3	%

(a) Amounts represent intercompany eliminations

Below is a reconciliation of income before provision for income taxes and equity income to Segment EBITDA and Segment Adjusted EBITDA:

	Three Months Ended June 30, 2013							Three Months Ended June 30, 2012
(in millions)	Olin Brass			Chase Brass		A.J. Oster		Olin Brass			Chase Brass		A.J. Oster
Income before provision for income taxes and equity income:	$	14.8		$	18.2	$	4.2	$	12.3		$	16.6	$	5.1
Interest expense		—			—		—		—			—		—
Depreciation expense		1.1			0.8		0.1		0.8			0.6		0.1
Amortization expense		—			—		—		—			0.1		—
Segment EBITDA (a)	$	15.9		$	19.0	$	4.3	$	13.1		$	17.3	$	5.2
Equity income, net of tax		0.5			—		—		0.2			—		—
Net income attributable to non-controlling interest		—			—		—		(0.1	)		—		—
Non-cash accretion of income of Dowa joint venture (b)		(0.2	)		—		—		(0.2	)		—		—
Segment Adjusted EBITDA(a)	$	16.2		$	19.0	$	4.3	$	13.0		$	17.3	$	5.2

(a) Segment EBITDA and Segment Adjusted EBITDA are non-GAAP financial measures. See “—Non-GAAP Measures—EBITDA-Based Measures”.

(b) As a result of the application of purchase accounting in connection with the November 2007 acquisition, no carrying value was initially assigned to our equity investment in our joint venture with Dowa. This adjustment represents the accretion of equity in our joint venture with Dowa over a 13-year period (which represents the estimated useful life of the technology and patents of the joint venture). See note 5 to our unaudited consolidated financial statements, which are included elsewhere in this report.

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Olin Brass

Olin Brass net sales increased by $52.1 million, or 29.2%, from $178.6 million for the three months ended June 30, 2012 to $230.7 million for the three months ended June 30, 2013. The increase was due to the sale of unprocessed metal, higher volume, and higher average sales prices, primarily due to increases in sales prices to A.J.Oster (which are eliminated via consolidation) and partially offset by lower prices to trade customers resulting from a shift in product mix as well as lower metal prices.

The sale of unprocessed metal and higher average sales prices, partially offset by lower metal prices for the three months ended June 30, 2013 contributed $39.0 million to the increase in net sales as compared to the same period in 2012.

Volume increased by 5.1 million pounds, or 7.4%, from 68.7 million pounds for the three months ended June 30, 2012 to 73.8 million pounds for the three months ended June 30, 2013. The increase in volume, which contributed $13.1 million to the increase in net sales, was the result of higher demand in the building and housing, munitions and coinage end markets, partially offset by lower demand in the electronics/electrical components end market and lower volume to A.J. Oster. In the three months ended June 30, 2013, A.J. Oster reduced purchases from Olin Brass and increased purchases from third party suppliers by approximately 1.8 million pounds compared to the same period in 2012. Excluding sales to A.J. Oster, Olin Brass volumes increased by 6.9 million pounds, or 12.2% in the three months ended June 30, 2013 compared to the same period in 2012.

Segment Adjusted EBITDA of Olin Brass increased by $3.2 million, from $13.0 million for the three months ended June 30, 2012 to $16.2 million for the three months ended June 30, 2013. The increase was due primarily to higher volume, lower shrinkage costs due to lower metal costs and higher yields, as well as higher average sales prices, partially offset by higher manufacturing conversion costs.

Chase Brass

Chase Brass net sales decreased by $1.4 million, or 0.8%, from $166.1 million for the three months ended June 30, 2012 to $164.7 million for the three months ended June 30, 2013. The decrease was due primarily to lower metal prices, partially offset by higher average sales prices and higher volume.

Lower metal prices, partially offset by higher average sales prices, for the three months ended June 30, 2013 contributed $11.1 million to the decrease in net sales as compared to the same period in 2012.

Volume increased by 3.2 million pounds, or 5.8%, from 54.9 million pounds for the three months ended June 30, 2012 to 58.1 million pounds for the three months ended June 30, 2013. The increase in volume, which contributed $9.7 million to the increase in net sales, was primarily the result of higher demand in the building and housing end market, partially offset by competition from foreign imports.

Segment Adjusted EBITDA of Chase Brass increased by $1.7 million, from $17.3 million for the three months ended June 30, 2012 to $19.0 million for the three months ended June 30, 2013. The increase was due primarily to higher volume, lower manufacturing conversion costs, lower shrinkage costs due to lower metal costs, and higher average sales prices.

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A.J. Oster

A.J. Oster net sales decreased by $5.0 million, or 5.9%, from $85.3 million for the three months ended June 30, 2012 to $80.3 million for the three months ended June 30, 2013. The decrease was due primarily to lower volume in the three months ended June 30, 2013 compared to the same period in 2012 and lower metal prices, partially offset by higher average sales prices.

Volume decreased by 0.5 million pounds, or 2.8%, from 17.6 million pounds for the three months ended June 30, 2012 to 17.1 million pounds for the three months ended June 30, 2013. The decrease in volume, which contributed $2.4 million to the decrease in net sales, was primarily the result of lower demand in the building and housing end market, which was influenced by lower shipments to project specific customers and partially offset by the overall recovery in the building and housing end market, and lower demand in electronics/electrical components end markets.

Lower metal prices, partially offset by higher average sales prices, decreased net sales by $2.6 million for the three months ended June 30, 2013 as compared to the same period in 2012.

Segment Adjusted EBITDA of A.J. Oster decreased by $0.9 million, from $5.2 million for the three months ended June 30, 2012 to $4.3 million for the three months ended June 30, 2013. The decrease was due to higher manufacturing conversion costs, primarily due to higher prices on purchases from Olin Brass, and lower volume, which was partially offset by higher average sales prices.

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Results of Operations

Consolidated Results of Operations for the Six Months Ended June 30, 2013, Compared to the Six Months Ended June 30, 2012.

	Six Months Ended June 30,												Change: 2013 vs. 2012
(in millions)	2013			% of Net Sales			2012			% of Net Sales			Amount			Percent
Net sales	$	906.4			100.0	%	$	860.4			100.0	%	$	46.0			5.3	%
Cost of sales		807.8			89.1	%		763.3			88.7	%		44.5			5.8	%
Gross profit		98.6			10.9	%		97.1			11.3	%		1.5			1.5	%
Selling, general and administrative expenses (a)		72.5			8.0	%		55.9			6.5	%		16.6			29.7	%
Operating income		26.1			2.9	%		41.2			4.8	%		(15.1	)		(36.7	%)
Interest expense		19.8			2.2	%		19.9			2.3	%		(0.1	)		(0.5	%)
Loss on extinguishment of debt		—			0.0	%		19.6			2.3	%		(19.6	)		(100.0	%)
Other expense, net		0.2			0.0	%		0.7			0.1	%		(0.5	)		(71.4	%)
Income before provision for income taxes and equity income		6.1			0.7	%		1.0			0.1	%		5.1			510.0	%
Provision for income taxes		12.5			1.4	%		7.3			0.8	%		5.2			71.2	%
Loss before equity income		(6.4	)		(0.7	%)		(6.3	)		(0.7	%)		(0.1	)		1.6	%
Equity income, net of tax		0.9			0.1	%		0.5			0.1	%		0.4			80.0	%
Net loss		(5.5	)		(0.6	%)		(5.8	)		(0.7	%)		0.3			(5.2	%)
Less: Net income attributable to noncontrolling interest		0.2			0.0	%		0.2			0.0	%		—			0.0	%
Net loss attributable to Global Brass and Copper Holdings, Inc.	$	(5.7	)		(0.6	%)	$	(6.0	)		(0.7	%)	$	0.3			(5.0	%)
Consolidated Adjusted EBITDA	$	66.4			7.3	%	$	64.0			7.4	%	$	2.4			3.8	%

(a) Amounts include non-cash profits interest compensation expense of $29.3 million and $19.5 million for the six months ended June 30, 2013 and 2012, respectively

Net Sales

Net sales increased by $46.0 million, or 5.3%, from $860.4 million for the six months ended June 30, 2012 to $906.4 million for the six months ended June 30, 2013. Net sales increased by $10.5 million due to an increase in volume, by $51.5 million as a result of the sales of unprocessed metal and by $2.0 million as a result of higher average sales prices in the six months ended June 30, 2013. These increases were partially offset by lower metal prices, which decreased net sales by $18.0 million. Metal prices reflect the replacement cost recovery from the customer, whereas the sales prices represent the pricing component of adjusted sales, which we define as the excess of net sales over the metal component of net sales.

Volume increased by 8.2 million pounds, or 3.1%, from 261.7 million pounds for the six months ended June 30, 2012 to 269.9 million pounds for the six months ended June 30, 2013. The increase in volume was the result of higher demand in the munitions and coinage end markets, as well as higher demand in the building and housing end market. These increases were partially offset by lower demand in the electronics/electrical components end market and increased competition from foreign imports.

55

The metal cost recovery component of net sales increased by $35.8 million, or 6.1%, from $588.7 million for the six months ended June 30, 2012 to $624.5 million for the six months ended June 30, 2013.

Sales of unprocessed metal increased the metal cost recovery component of net sales by $51.5 million in the six months ended June 30, 2013. Higher volume increased the metal cost recovery component of net sales by $2.3 million. Partially offsetting the increase was the change in customer mix and lower metal prices, which decreased the metal cost recovery component of net sales by $18.0 million. The metal component of net sales per pound of finished product shipped increased by 2.7%, due primarily to the inclusion of the sale of unprocessed metal, the quantity of which is not included in the pounds shipped. The metal component of net sales per pound of finished product sold excluding the sale of unprocessed metal (the quantity of which is not included in pounds shipped) decreased by 5.6%, primarily as a result of a 6.5% decrease in the average daily copper prices reported by COMEX.

Adjusted Sales

Adjusted sales, the excess of net sales over the metal cost recovery component of net sales, increased by $10.2 million, or 3.8%, from $271.7 million for the six months ended June 30, 2012 to $281.9 million for the six months ended June 30, 2013. Higher volume and higher average sales prices contributed $8.2 million and $2.0 million, respectively, to the increase. Adjusted sales per pound increased in the six months ended June 30, 2013 by 1.0% compared to the same period in 2012 which was the result of a net increase in average sales prices at the segment level, partially offset by the shift in product mix within each segment as well as effect of changes in the mix of sales by segment relative to our consolidated sales as a whole. Adjusted sales is a non-GAAP financial measure. See “—Non-GAAP Measures—Adjusted Sales”. The following table presents a reconciliation of net sales to adjusted sales and net sales per pound to adjusted sales per pound:

	Six Months Ended June 30,				Change: 2013 vs. 2012
(in millions, except per pound values)	2013		2012		Amount			Percent
Pounds shipped		269.9		261.7		8.2			3.1	%
Net sales	$	906.4	$	860.4	$	46.0			5.3	%
Metal component of net sales		624.5		588.7		35.8			6.1	%
Adjusted sales	$	281.9	$	271.7	$	10.2			3.8	%
$ per pound shipped
Net sales per pound	$	3.36	$	3.29	$	0.07			2.1	%
Metal component of net sales per pound		2.31		2.25		0.06			2.7	%
Adjusted sales per pound	$	1.05	$	1.04	$	0.01			1.0	%
Average copper price per pound reported by COMEX	$	3.43	$	3.67	$	(0.24	)		(6.5	%)

Gross Profit

Gross profit increased by $1.5 million, or 1.5%, from $97.1 million for the six months ended June 30, 2012 to $98.6 million for the six months ended June 30, 2013. Gross profit per pound remained flat at $0.37 for the six months ended June 30, 2013 as compared to the same period in 2012.

Gross profit for the six months ended June 30, 2013 included a loss of $0.1 million related to net unrealized losses on derivative contracts and a $0.3 million non-cash lower of cost or market charge for the write down of inventory. Gross profit for the six months ended June 30, 2012 included a gain of $1.2 million related to net unrealized gains on derivative contracts. We exclude the above items in calculating Segment Adjusted EBITDA and Consolidated Adjusted EBITDA. See “—Non-GAAP Measures—EBITDA-Based Measures”.

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Depreciation expense included in gross profit increased from $2.8 million for the six months ended June 30, 2012 to $3.5 million for the six months ended June 30, 2013. The increase is attributable to an increase in our depreciable asset base from $74.2 million at June 30, 2012 to $95.4 million at June 30, 2013.

Several other factors contributed $3.8 million to the increase in gross profit. Higher average sales prices, lower shrinkage costs due to lower metal costs and higher yields, as well as higher volume contributed $2.0 million, $1.8 million and $1.3 million, respectively, to the increase in gross profit. These factors were partially offset by higher manufacturing conversion costs of $1.3 million due to product mix and operational issues which adversely impacted product flow and yield at Olin Brass.

Selling, General and Administrative Expenses

Selling, general and administrative expenses increased by $16.6 million, or 29.7%, from $55.9 million for the six months ended June 30, 2012 to $72.5 million for the six months ended June 30, 2013.

Non-cash compensation charges for vested profits interest shares included in selling, general and administrative expenses were $8.9 million and $19.5 million for the six months ended June 30, 2013 and 2012, respectively. Additionally, in the six months ended June 30, 2013, Halkos modified the Halkos Equity Plan to eliminate its right to acquire all or a portion of the Class B Shares for less than fair market value under certain conditions. This modification to the Halkos Equity Plan triggered the recognition of $20.4 million of incremental non-cash compensation expense.

During the six months ended June 30, 2013, in connection with the IPO, the Company terminated its Management Services Agreement with affiliates of KPS Funds prior to the expiration of the initial term and was required to pay an early termination fee equal to the value of the advisory fee that would have otherwise been payable to affiliates of KPS Funds through the end of the Management Services Agreement. The Company paid affiliates of KPS Funds $4.5 million related to the Company’s early termination and all unpaid management advisory fees and recorded the charges in selling, general and administrative expenses. The management advisory fees for the six months ended June 30, 2013 and 2012 were $0.3 million and $0.5 million, respectively.

The Company incurred professional fees for accounting, tax, legal and consulting services related to the Company’s IPO efforts of $1.5 million and $1.1 million during the six months ended June 30, 2013 and 2012, respectively. Additionally, for the three months ended June 30, 2013, the Company recognized $0.2 million related to share-based compensation resulting from the grant of non-qualified stock options, restricted stock and performance-based shares to certain members of the Company’s management and its Board of Directors in connection with the IPO.

Several other offsetting factors contributed to the remaining $1.9 million increase in selling, general and administrative expenses in the six months ended June 30, 2013 as compared to the same period in 2012. Salaries, benefits and incentive compensation increased by $1.5 million and outside services increased by $0.4 million, both of which were in support of our business strategy, as well as an increase of $0.5 million in other professional fees for accounting, tax, legal and consulting services, partially offset by a $0.5 million decrease in other miscellaneous selling, general and administrative expenses.

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Operating Income

Operating income decreased by $15.1 million, or 36.7%, from of $41.2 million for the six months ended June 30, 2012 to $26.1 million for the six months ended June 30, 2013 due to the changes in gross profit and selling, general and administrative expenses described above.

Interest Expense

Interest expense decreased by $0.1 million from $19.9 million for the six months ended June 30, 2012 to $19.8 million for the six months ended June 30, 2013. The decrease was due to lower interest rates (a weighted average of 9.34% per annum during 2013 compared to 9.89% per annum during 2012) and a decrease in amortization of debt discount and debt issuance costs, partially offset by higher average borrowings on our debt facilities of $386.0 million as compared to $319.6 million in 2012.

The following table summarizes the components of interest expense:

	Six Months Ended
	June 30,
(in millions)	2013		2012
Interest on principal	$	18.1	$	16.0
Interest rate cap agreements		—		0.1
Amortization of debt discount and issuance costs		1.2		3.3
Other borrowing costs (a)		0.5		0.5
Interest expense	$	19.8	$	19.9

(a) Includes fees related to letters of credit and unused line of credit fees.

Loss on Extinguishment of Debt

In connection with the termination prior to maturity of the senior secured term loan, we recognized $19.6 million as loss from extinguishment of debt for the six months ended June 30, 2012. The loss on extinguishment of debt includes $7.1 million of unamortized debt issuance costs and $4.9 million of unamortized debt discount as well as $6.4 million of call premium and $0.1 million of professional service fees related to the early termination. Additionally, $1.1 million of costs associated with the issuance of the Senior Secured Notes was expensed as incurred in accordance with ASC 470-50, Modifications and Extinguishments.

Other Expense, Net

Other expense, net decreased by $0.5 million, or 71.4% from $0.7 million for the six months ended June 30, 2012 to $0.2 million for the six months ended June 30, 2013. In 2012, the Company recorded a call premium of $0.5 million resulting from a voluntary prepayment of $15.0 million on our senior secured loan in April 2012.

Provision for Income Taxes

The provision for income taxes was $12.5 million for the six months ended June 30, 2013 compared to $7.3 million for the six months ended June 30, 2012. The change in the provision for income taxes was primarily due to the increase in the income before provision for income taxes and equity income of $5.1 million for the six months ended June 30, 2013 as compared to the same period in 2012, as well as the increase in non-deductible non-cash compensation of $9.8 million for the six months ended June 30, 2013, as compared to the same period in 2012. The effective income tax rate was 206.4% and 795.9% for the six months ended June 30, 2013 and 2012, which was primarily due to the aforementioned non-deductible non-cash compensation $29.3 million and $19.5 million in the six months ended June 30, 2013 and 2012, respectively.

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The following table summarizes the effective income tax rate components for the six months ended June 30, 2013 and 2012:

	Six Months Ended
	June 30,
	2013			2012
Statutory provision rate		35.0	%		35.0	%
Permanent differences and other items
State tax provision		19.2	%		1.2	%
Section 199 manufacturing credit		(16.4	%)		(0.5	%)
Return to provision adjustments / Uncertain tax positions		(2.5	%)		(69.0	%)
Non-deductible non-cash compensation		169.1	%		838.2	%
Other		2.0	%		(9.0	%)
Effective income tax rate		206.4	%		795.9	%

Equity Income

Equity income, net of tax, increased by $0.4 million from $0.5 million for the six months ended June 30, 2012 to $0.9 million for the six months ended June 30, 2013.

Net Loss Attributable to Global Brass and Copper Holdings, Inc.

Net loss attributable to Global Brass and Copper Holdings, Inc. decreased by $0.3 million, or 5.0%, from $6.0 million for the six months ended June 30, 2012 to $5.7 million for the six months ended June 30, 2013 due to the loss on extinguishment of debt in 2012 as described above, partially offset by an increase in non-cash compensation expense and the provision for income taxes, as described above.

Consolidated Adjusted EBITDA

Consolidated Adjusted EBITDA increased by $2.4 million, or 3.8%, from $64.0 million for the six months ended June 30, 2012 to $66.4 million for the six months ended June 30, 2013. The increase was due to higher average sales prices of $2.0 million, lower shrinkage cost due to lower metal costs and higher yields of $1.8 million, higher volume of $1.3 million, an increase in other adjustments included in the calculation of Consolidated Adjusted EBITDA of $0.6 million and a $0.5 million decrease in other miscellaneous selling general and administrative expenses. Partially offsetting the increase was an increase in salaries, benefits and incentive compensation of $1.5 million and an increase in outside services of $0.4 million, both of which were in support of our business strategy, as well as an increase of $0.5 million in other professional fees for accounting, tax, legal and consulting services and increased manufacturing conversion costs of $1.4 million due to product mix and operational issues which adversely impacted product flow and yield at Olin Brass.

Consolidated EBITDA and Consolidated Adjusted EBITDA are non-GAAP financial measures. See “—Non-GAAP Measures—EBITDA-Based Measures”.

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Below is a reconciliation of net loss attributable to Global Brass and Copper Holdings, Inc. to Consolidated EBITDA and Consolidated Adjusted EBITDA for the six months ended June 30, 2013 and 2012:

	Six Months Ended June 30,
(in millions)	2013			2012
Net loss attributable to Global Brass and Copper Holdings, Inc.	$	(5.7	)	$	(6.0	)
Interest expense		19.8			19.9
Provision for income taxes		12.5			7.3
Depreciation expense		3.9			3.1
Amortization expense		0.1			0.1
Consolidated EBITDA	$	30.6		$	24.4
Loss (gain) on derivative contracts (a)		0.1			(1.2	)
Non-cash accretion of income of Dowa joint venture (b)		(0.4	)		(0.4	)
Loss on extinguishment of debt (c)		—			19.6
Non-cash Halkos profits interest compensation expense (d)		29.3			19.5
Management fees (e)		4.8			0.5
Specified legal/professional expenses (f)		1.5			1.1
Lower of cost or market adjustment to inventory (g)		0.3			—
Share-based compensation expense (h)		0.2			—
Other adjustments (i)		—			0.5
Consolidated Adjusted EBITDA	$	66.4		$	64.0

(a) Represents unrealized gains and losses on derivative contracts in support of our balanced book approach and unrealized gains and losses associated with derivative contracts with respect to electricity and natural gas costs.

(b) As a result of the application of purchase accounting in connection with the November 2007 acquisition, no carrying value was initially assigned to our equity investment in our joint venture with Dowa. This adjustment represents the accretion of equity in our joint venture with Dowa at the date of the acquisition over a 13-year period (which represents the estimated useful life of the technology and patents of the joint venture). See note 5 to our unaudited consolidated financial statements, which are included elsewhere in this report.

(c) Represents the loss on the extinguishment of debt recognized in connection with the termination prior to maturity of the senior secured term loan.

(d) The 2013 amount includes $20.4 million that represents incremental non-cash compensation as a result of the modification made to the Halkos Equity Plan to eliminate Halkos’ right to acquire all or a portion of the Class B Shares for less than fair market value upon certain conditions. The 2013 amount also includes $8.9 million that represents dividend payments made by Halkos to members of our management that resulted in a non-cash compensation charge in connection with the IPO that occurred in May 2013. See note 14 to our unaudited consolidated financial statements, which are included elsewhere in this report. The 2012 amount represents the dividend payment made by Halkos to members of our management that resulted in a non-cash compensation charge in connection with the Parent distribution that occurred on June 1, 2012. See note 14 to our unaudited consolidated financial statements, which are included elsewhere in this report.

(e) The 2013 amount represents an early termination fee equal to the value of the advisory fee that would have otherwise been payable to affiliates of KPS through the end of the agreement. The 2012 amount represents a portion of the annual advisory fees payable to affiliates of KPS. See note 12 to our unaudited consolidated financial statements, which are included elsewhere in this report.

(f) Specified legal/professional expenses for the six months ended June 30, 2013 and 2012 included $1.5 million and $1.1 million, respectively, of professional fees for accounting, tax, legal and consulting services related to a the IPO and certain regulatory and compliance matters.

(g) Represents a non-cash lower of cost or market charge for the write down of inventory recorded during the six months ended June 30, 2013.

(h) Represents share-based compensation expense resulting from the grant of non-qualified stock options, restricted stock and performance-based shares to certain members of the Company’s management and its Board of Directors in connection with the IPO.

(i) Represents a call premium of $0.5 million as a result of a voluntary prepayment of $15.0 million on our senior secured loan in April 2012.

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Segment Results of Operations

Segment Results of Operations for the Six Months Ended June 30, 2013, Compared to the Six Months Ended June 30, 2012.

	Six Months Ended						Change
	June 30,						2013 vs. 2012
(in millions)	2013			2012			Amount			Percent
Pounds shipped
Olin Brass		140.2			134.7			5.5			4.1	%
Chase Brass		116.1			116.7			(0.6	)		(0.5	%)
A.J. Oster		34.4			35.8			(1.4	)		(3.9	%)
Corporate & other (a)		(20.8	)		(25.5	)		4.7			(18.4	%)
Total		269.9			261.7			8.2			3.1	%
Net Sales
Olin Brass	$	431.6		$	357.2		$	74.4			20.8	%
Chase Brass		339.2			354.9			(15.7	)		(4.4	%)
A.J. Oster		164.3			173.7			(9.4	)		(5.4	%)
Corporate & other (a)		(28.7	)		(25.4	)		(3.3	)		13.0	%
Total	$	906.4		$	860.4		$	46.0			5.3	%
Segment Adjusted EBITDA
Olin Brass	$	27.7		$	23.8		$	3.9			16.4	%
Chase Brass		37.8			37.2			0.6			1.6	%
A.J. Oster		8.9			10.4			(1.5	)		(14.4	%)
Total for operating segments	$	74.4		$	71.4		$	3.0			4.2	%

(a) Amounts represent intercompany eliminations

Below is a reconciliation of income before provision for income taxes and equity income to Segment EBITDA and Segment Adjusted EBITDA:

	Six Months Ended							Six Months Ended
	June 30, 2013							June 30, 2012
(in millions)	Olin Brass			Chase Brass		A.J. Oster		Olin Brass			Chase Brass		A.J. Oster
Income before provision for income taxes and equity income:	$	25.2		$	36.4	$	8.7	$	22.2		$	35.9	$	10.3
Interest expense		—			—		—		—			—		—
Depreciation expense		2.2			1.3		0.2		1.7			1.2		0.1
Amortization expense		—			0.1		—		—			0.1		—
Segment EBITDA (a)	$	27.4		$	37.8	$	8.9	$	23.9		$	37.2	$	10.4
Equity income, net of tax		0.9			—		—		0.5			—		—
Net income attributable to non-controlling interest		(0.2	)		—		—		(0.2	)		—		—
Non-cash accretion of income of Dowa joint venture (b)		(0.4	)		—		—		(0.4	)		—		—
Segment Adjusted EBITDA(a)	$	27.7		$	37.8	$	8.9	$	23.8		$	37.2	$	10.4

(a) Segment EBITDA and Segment Adjusted EBITDA are non-GAAP financial measures. See “—Non-GAAP Measures—EBITDA-Based Measures”.

(b) As a result of the application of purchase accounting in connection with the November 2007 acquisition, no carrying value was initially assigned to our equity investment in our joint venture with Dowa. This adjustment represents the accretion of equity in our joint venture with Dowa over a 13-year period (which represents the estimated useful life of the technology and patents of the joint venture). See note 5 to our unaudited consolidated financial statements, which are included elsewhere in this report.

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Olin Brass

Olin Brass net sales increased by $74.4 million, or 20.8%, from $357.2 million for the six months ended June 30, 2012 to $431.6 million for the six months ended June 30, 2013. The increase was due to the sale of unprocessed metal, higher volume, and higher average sales prices, partially offset by lower metal prices.

The sale of unprocessed metal and higher average sales prices, partially offset by lower metal prices for the six months ended June 30, 2013 contributed $59.8 million to the increase in net sales as compared to the same period in 2012.

Volume increased by 5.5 million pounds, or 4.1%, from 134.7 million pounds for the six months ended June 30, 2012 to 140.2 million pounds for the six months ended June 30, 2013. The increase in volume, which contributed $14.6 million to the increase in net sales, was the result of higher demand in the munitions, coinage and the building and housing end markets, partially offset by a lower demand in the electronics/electrical components end market. During the six months ended June 30, 2013, A.J. Oster reduced purchases from Olin Brass and increased purchases from third party suppliers by approximately 4.6 million pounds compared to the same period in 2012. Excluding sales to A.J. Oster, Olin Brass volumes increased by 10.1 million pounds, or 9.3% through six months ended June 30, 2013 compared to the same period in 2012.

Segment Adjusted EBITDA of Olin Brass increased by $3.9 million, from $23.8 million for the six months ended June 30, 2012 to $27.7 million for the six months ended June 30, 2013. The increase was due primarily to higher average sales prices, higher volume, and lower shrinkage costs due to lower metal costs and higher yields, partially offset by higher manufacturing conversion costs and increased salaries, benefits and incentive compensation.

Chase Brass

Chase Brass net sales decreased by $15.7 million, or 4.4%, from $354.9 million for the six months ended June 30, 2012 to $339.2 million for the six months ended June 30, 2013. The decrease was due primarily to lower volume and lower metal prices, partially offset by higher average sales prices.

Lower metal prices, partially offset by higher average sales prices for the six months ended June 30, 2013, contributed $14.0 million to the decrease in net sales as compared to the same period in 2012.

Volume decreased by 0.6 million pounds, or 0.5%, from 116.7 million pounds for the six months ended June 30, 2012 to 116.1 million pounds for the six months ended June 30, 2013. The decrease in volume, which contributed $1.7 million to the decrease in net sales, was the result of lower demand in the electronics/electrical components end market and increased competition from foreign imports, partially offset by higher demand in the building and housing end market.

Segment Adjusted EBITDA of Chase Brass increased by $0.6 million, from $37.2 million for the six months ended June 30, 2012 to $37.8 million for the six months ended June 30, 2013. The increase was due primarily to higher average sales prices, partially offset by lower volume and higher manufacturing conversion costs.

A.J. Oster

A.J. Oster net sales decreased by $9.4 million, or 5.4%, from $173.7 million for the six months ended June 30, 2012 to $164.3 million for the six months ended June 30, 2013. The decrease was due primarily to lower volume in the six months ended June 30, 2013 compared to the same period in 2012 and lower metal prices, partially offset by higher average sales prices.

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Volume decreased by 1.4 million pounds, or 3.9%, from 35.8 million pounds for the six months ended June 30, 2012 to 34.4 million pounds for the six months ended June 30, 2013. The decrease in volume, which contributed $7.0 million to the decrease in net sales, was primarily the result of lower demand in the building and housing and electronics/electrical components end markets.

Lower metal prices, partially offset by higher average sales prices for the six months ended June 30, 2013 contributed $2.4 million to the decrease in net sales as compared to the same period in 2012.

Segment Adjusted EBITDA of A.J. Oster decreased by $1.5 million, from $10.4 million for the six months ended June 30, 2012 to $8.9 million for the six months ended June 30, 2013. The decrease was due to higher manufacturing conversion costs and lower volume, which was partially offset by higher average sales prices.

Liquidity and Capital Resources

Sources and Uses of Cash

Our primary uses of cash are to fund working capital, operating expenses, debt service and capital expenditures. Historically, our primary sources of short-term liquidity have been cash flow from operations and borrowings under our ABL Facility. Global Brass and Copper Holdings, Inc. (“Holdings,” the “Company,” “we,” “us,” or “our”), derives all its cash flow from its subsidiaries, including Global Brass and Copper, Inc. (“GBC”), and receives dividends, distributions and other payments from them to generate the funds necessary to meet its financial obligations. However, Holdings is a holding company with no operations, no employees and no assets other than its investment in GBC. All of our operations are conducted at GBC and its subsidiaries. GBC is also the primary obligor on our indebtedness, and Holdings has no indebtedness other than its guarantee of GBC’s indebtedness. The credit agreement governing the ABL Facility and the indenture governing the Senior Secured Notes (the “Indenture”) do not limit the ability of subsidiaries GBC to dividend or distribute cash to GBC to meet its obligations under those agreements or to operate its business. The credit agreement governing the ABL Facility and the Indenture do, however, limit the ability of GBC and its subsidiaries to dividend or distribute cash to Holdings and to its equityholders, although ordinary course dividends and distributions to meet the limited holding company expenses and related obligations at Holdings of up to $5 million per year are permitted under those agreements. Under the terms of the Indenture, GBC is also permitted to dividend or distribute to Holdings and its equityholders up to 50% of its “Consolidated Net Income” (as such term is used in the Indenture) from April 1, 2012 to the end of GBC’s most recently ended fiscal quarter. As of June 30, 2013, all of the net assets of the subsidiaries are restricted except for $28.6 million which are permitted dividend distributions under the Indenture. Because these limitations apply only to dividends or distributions to a holding company and our equityholders, we do not believe that the restrictions on dividends and distributions to Holdings and its equityholders imposed by the terms of our debt agreements have any impact on our liquidity, financial condition or results of operations. We believe that these resources will be sufficient to meet our working capital and debt service needs for the next twelve months, including costs that we may incur in connection with our growth strategy. At June 30, 2013, we had $56.0 million of outstanding borrowings under our ABL Facility, $0.5 million of letters of credit, and borrowing availability of $143.5 million. The letters of credit primarily represent collateral against certain workers compensation liabilities.

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Cash Flows

The following table presents the summary components of net cash provided by (used in) operating, investing and financing activities for the periods indicated. As of June 30, 2013, we had cash of $34.0 million, compared to cash of $13.9 million at December 31, 2012. The accompanying discussion should be read in conjunction with our consolidated statements of cash flows in our unaudited consolidated financial statements included elsewhere in this report.

Cash Flow Analysis	Six Months Ended June 30,
(in millions)	2013			2012
Cash flows (used in) provided by operating activities	$	(17.9	)	$	30.3
Cash flows used in investing activities	$	(8.1	)	$	(7.2	)
Cash flows provided by (used in) financing activities	$	46.4		$	(60.3	)

Cash flows from operating activities

During the six months ended June 30, 2013, net cash used in operating activities was $17.9 million. This amount was attributable to a net loss of $5.5 million and an increase in assets net of liabilities of $48.0 million, offset by adjustments to net loss of $35.6 million, primarily due to the non-cash profits interest compensation expense of $8.9 million and $20.4 million of incremental non-cash compensation related to the modification to the Halkos Equity Plan.

The primary contributor to the increase in assets net of liabilities was a $13.1 million increase in accounts receivable net of accounts payable (total accounts receivable increased by $38.7 million, which was partially offset by the increase in accounts payable of $25.6 million), an increase of $25.4 million in inventory, an increase in prepaid expenses and other current assets of $13.1 million, primarily due to the deferred expense related to the sale of unprocessed metal, and an increase in income taxes receivable net of income taxes payable of $0.8 million, partially offset by an increase in accrued liabilities of $4.3 million, which was primarily due to the increase in deferred revenue related to the sale of unprocessed metal and partially offset by the timing of payments related to incentive compensation, and an increase in accrued interest of $0.1 million.

The increase in inventory is primarily due to a shift in the product mix at Olin Brass to items requiring more processing steps and operational issues affecting product flow and yield within the brass mill and downstream cupping operation.

The increase in accounts receivable was due to an increase in trade receivables as a result of higher sales during the second quarter of 2013 as compared to the fourth quarter of 2012, partially offset by the decrease in day’s sales outstanding (“DSO”) from 44 days as of December 31, 2012 to 41 days at June 30, 2013. The change in DSO was due primarily to customer mix and to seasonal and intra-month fluctuations in the timing of shipments and collections. The increase in accounts payable was due to higher volume in the second quarter of 2013 as compared to the fourth quarter of 2012, partially offset by the decrease in the purchase payment cycle from 24 days at December 31, 2012 to 22 days at June 30, 2013. The decrease in the purchase payment cycle was due primarily to vendor mix and to seasonal and intra-month fluctuations in the timing of material receipts and payments.

During the six months ended June 30, 2012, net cash provided by operating activities was $30.3 million. This amount was attributable to the net loss of $5.8 million and an increase in assets net of liabilities of $8.2 million, offset by adjustments to net loss of $44.3 million, primarily due to the loss on extinguishment of debt in connection with the Term Loan Refinancing of $19.6 million and non-cash profits interest compensation expense of $19.5 million.

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The primary contributors to the increase in assets net of liabilities was the $5.0 million increase in accounts receivable net of accounts payable (total accounts receivable increased by $31.7 million and accounts payable increased by $26.7 million), a decrease in accrued interest of $0.7 million and accrued liabilities of $7.0 million primarily due to the timing of payments related to incentive compensation, a $6.4 million call premium paid in connection with the Term Loan Refinancing and an increase in other assets net of liabilities of $0.8 million. Partially offsetting the increase was the $6.1 million reduction in inventory due to manufacturing process improvements and a decrease in prepaid expenses and other current assets of $5.4 million and an increase in accrued taxes of $0.2 million.

The increase in accounts receivable was due to an increase in trade receivables as a result of higher sales during the second quarter of 2012 as compared to the fourth quarter of 2011, partially offset by the decrease in the DSO from 43 days as of December 31, 2011 to 42 days as of June 30, 2012. The change in DSO was due primarily to customer mix and to seasonal and intra-month fluctuations in the timing of shipments and collections. The increase in accounts payable was due to higher volume in the second quarter of 2012 as compared to the fourth quarter of 2011 as well as an increase in the purchase payment cycle from 23 days as of December 31, 2011 to 24 days at June 30, 2012.

Cash flows from investing activities

Net cash used in investing activities was $8.1 million for the six months ended June 30, 2013, which consisted primarily of $8.3 million of capital improvements or replacement of existing capital items, partially offset by $0.2 million of proceeds from the sale of property, plant and equipment.

Net cash used in investing activities was $7.2 million for the six months ended June 30, 2012, which consisted primarily of capital improvements or replacement of existing capital items.

Cash flows from financing activities

Net cash provided by financing activities was $46.4 million for the six months ended June 30, 2013, which consisted primarily of net borrowings under the ABL Facility of $41.5 million, as well as a decrease of $4.9 million in the receivable due from stockholder as all amounts were received pertaining to reimbursable expenses incurred in connection with the Company’s IPO efforts.

Net cash used in financing activities was $60.3 million for the six months ended June 30, 2012, which was the result of the payment on the term loan of $310.9 million (including Term Loan repayment of $266.5 million associated with the Term Loan Retirement, a voluntary Term Loan prepayment of $15.0 million, a mandatory Term Loan prepayment of $28.6 million, and scheduled Term Loan payments of $0.8 million), distribution to Halkos of $160.0 million, payment of $12.9 million of costs associated with the issuance of the Senior Secured Notes, and $2.2 million receivable due from stockholder pertaining to reimbursable expenses, offset by proceeds from the Senior Secured Notes of $375.0 million and net borrowings on the ABL facility of $50.7 million.

Covenant Compliance

“EBITDA” (as defined in the agreement governing the ABL Facility) is used in the agreement governing the ABL Facility to measure compliance with various financial ratio tests. See “—Non-GAAP Measures—EBITDA-Based Measures”.

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Fixed Charge Coverage Ratio

Pursuant to the agreement governing the ABL Facility, the fixed charge coverage ratio is calculated each month on a rolling twelve-month basis by dividing (1) “EBITDA” (as defined in the agreement governing the ABL Facility) minus cash taxes to the extent actually paid during such period, dividends and capital expenditures paid in cash during such period, for such twelve-month period by (2) Fixed Charges for such twelve-month period. Fixed Charges are defined as all interest expense, excluding paid-in-kind, accrued or deferred interest, net of all interest income, plus all regularly scheduled principal payments of indebtedness for borrowed money, indebtedness for the deferred purchase price of any property or services or indebtedness with respect to capital leases.

The fixed charge coverage ratio covenant only is tested when excess availability is less than $20.0 million for five consecutive days (10% of the $200.0 million maximum borrowing base currently in effect). Under such circumstances, we would be required to maintain a fixed charge coverage ratio of greater than or equal to 1.1:1.

As of June 30, 2013, the fixed charge coverage ratio was not in effect.

Minimum Excess Availability

Pursuant to the agreement governing the ABL Facility, for any period of two consecutive days, “Excess Availability” under the ABL Facility may not be less than $10.0 million. Under the agreement governing the ABL Facility, “Excess Availability” is defined as (1) the lesser of: (a) the “Borrowing Base” (as defined in the agreement governing the ABL Facility) and (b) the maximum amount available under the ABL Facility at such time; minus (2) the sum of: (a) the amount of all then outstanding loans under the ABL Facility; plus (b) the amount of all reserves then established in respect of letter of credit obligations; plus (c) the aggregate amount of all then outstanding trade payables that are more than 60 days past due as of the end of the immediately preceding calendar month (other than such payables that are being contested in good faith); plus (d) without duplication, the amount of checks issued but not yet sent to pay trade payables and other obligations more than 60 days past due as of the end of the immediately preceding calendar month, plus (e) Qualified Cash (as defined in the agreement governing the ABL Facility) only in the event that Excess Availability (without giving effect to Qualified Cash) as of such date is greater than $50.0 million.

As of June 30, 2013, we were in compliance with the minimum Excess Availability covenant.

Outstanding Indebtedness

The ABL Facility

On August 18, 2010, we entered into the 2010 ABL Facility, providing for borrowings of up to the lesser of $150.0 million or the borrowing base, in each case, less outstanding loans and letters of credit. As a result of the ABL Amendment, which occurred on June 1, 2012, the maximum availability under the ABL Facility was increased to $200.0 million. The borrowing base is defined as 85% of eligible accounts; plus the lesser of (x) 80% of the value of eligible inventory, (y) 90% of the net recovery percentage for the eligible inventory multiplied by the value of such eligible inventory and (z) the “Inventory Loan Limit” (which was $200.0 million as of June 30, 2013); minus reserves. As of June 30, 2013, our eligible collateral for our borrowing base had a value of $312.8 million, with a maximum availability of $200.0 million. As of June 30, 2013, we had $143.5 million available for borrowing under the ABL Facility, giving effect to $56.0 million of outstanding borrowings and $0.5 million of outstanding letters of credit. In the event of increased commodity prices as indicated by the terms of the ABL Facility agreement, we may request, but the lenders are not obligated to, increase the maximum borrowings available up to $250.0 million. At any time, if the amount outstanding under the ABL Facility exceeds the maximum allowable borrowings, we may be required to make a mandatory prepayment for the amount of the excess borrowings.

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At any time after the occurrence and during the continuance of a “Trigger Event”, as defined in the agreement governing the ABL Facility, subject to certain thresholds, reinvestment rights and other exceptions, proceeds received from asset sales, equity issuances or other specified events will be required to be applied (as mandatory prepayments) in whole or in part towards the extinguishment of outstanding amounts due under the ABL Facility.

We may elect to receive advances under the ABL Facility in the form of either prime rate advances or LIBOR rate advances, under the terms set forth in the agreement governing the ABL Facility. The unused portion under the ABL Facility determines the applicable spread added to the LIBOR rate. The unused portion the ABL Facility was $143.5 million as of June 30, 2013. Unused amounts under the ABL Facility incur an unused line fee of 0.50% per annum, payable in full on a quarterly basis. Also effective with the ABL Amendment, outstanding borrowings under the ABL Facility bear interest at a rate equal to either (i) for prime rate loans, a prime rate plus a spread between 1.0% and 1.5%, depending on excess availability levels or (ii) for LIBOR rate loans, LIBOR plus a spread of 2.0% to 2.5% depending on excess availability levels. As of June 30, 2013, amounts outstanding under the ABL Facility accrued interest at a rate of 4.25%. As of December 31, 2012, amounts outstanding under the ABL Facility bore interest at a rate of 4.50%.

The ABL Facility has an expiration date of June 1, 2017 and contains various covenants to which we are subject on an ongoing basis. The ABL Facility restricts our ability to, among other things, incur indebtedness, grant liens, repurchase stock, issue cash dividends, make investments and acquisitions and sell assets, in each case subject to certain designated exceptions. Outstanding borrowings under the ABL Facility are secured by a senior-priority security interest in our accounts receivable and inventory (which secure the Senior Secured Notes on a junior-priority basis) and by a junior-priority security interest in our fixed assets (which secure the Senior Secured Notes on a senior-priority basis). As of June 30, 2013, we were in compliance with all of our covenants under the ABL Facility.

The ABL Facility contains customary events of default including, among others, failure to make payment when due, materially incorrect representations and warranties, breach of covenants, events of bankruptcy, or a change in control. In the case of an event of default occurring, the applicable interest rate spread increases by 2.0%, and the lenders would have the option to call the outstanding amount due.

Senior Secured Notes

On June 1, 2012, GBC issued $375.0 million in aggregate principal amount of 9.50% Senior Secured Notes due 2019. A portion of the net proceeds from the Senior Secured Notes was used to repay in full the $266.5 million of principal outstanding under our Term Loan Facility, and to make a $160.0 million distribution to our parent, Halkos. The Senior Secured Notes are guaranteed by Holdings, and substantially all of our existing and future 100%-owned U.S. subsidiaries. The Senior Secured Notes are secured by a senior-priority security interest in our fixed assets (which secure the ABL Facility on a junior-priority basis) and by a junior-priority security interest in our accounts receivable and inventory (which secure the ABL Facility on a senior-priority basis).

The Indenture contains covenants that limit GBC’s ability and the ability of restricted subsidiaries to, among other things, incur or guarantee additional debt or issue preferred stock, pay dividends, repurchase equity interests, repay subordinated indebtedness, make investments, create restrictions on the payment of dividends or other amounts to us from restricted subsidiaries, sell assets, including collateral, enter into transactions with affiliates, merge or consolidate with another person, sell or otherwise dispose of all or substantially all of our assets and create liens on our or the restricted subsidiaries’ assets to secure debt.

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The Senior Secured Notes mature on June 1, 2019. Interest on the Senior Secured Notes accrues at the rate of 9.50% per annum and is payable semiannually in arrears on June 1 and December 1, commencing on December 1, 2012.

We are required to offer to redeem the Senior Secured Notes at a purchase price of 101% of their principal amount (plus accrued and unpaid interest) upon the occurrence of certain change of control events. In addition, upon the completion of certain asset dispositions, we may be required to offer to redeem the Senior Secured Notes at a purchase price of 100% of their principal amount (plus accrued and unpaid interest) if we do not apply the proceeds of such asset dispositions in accordance with the Indenture by certain specified deadlines.

Pursuant to a registration rights agreement, dated as of June 1, 2012, the Company is required to effect a registered offer to issue registered new notes (with substantially the same terms as the Senior Secured Notes) in exchange for the Senior Secured Notes that the Company issued in a private offering on June 1, 2012. If the Company does not cause the registration statement for the exchange offer to become effective within 365 days after June 1, 2012, or otherwise fails to comply with the other deadlines in the registration rights agreement, it will be required to pay additional interest on the Senior Secured Notes equal to 0.25% per annum for each 90 days it is in default, up to a maximum of 0.50% per annum.

As of June 1, 2013, the registration statement for the exchange offer had not yet become effective, and accordingly, the Company is now required to pay a default rate of 0.25% per annum in addition to the stated rate of 9.50%. The Company filed a Form S-4 Registration Statement under the Securities Act of 1933 on June 10, 2013 and a subsequent amended Form S-4 Registration Statement on July 24, 2013 with respect to the proposed exchange of the Senior Secured Notes. Upon completions of the exchange offer, the Company’s obligation to pay any future Additional Interest will terminate. There are no assurances as to the timing of when the Company will complete the exchange offer with respect to its Senior Secured Notes and the corresponding reduction in the interest rate applicable to the new notes.

Recently Issued and Recently Adopted Accounting Pronouncements

For information on recently issued and recently adopted accounting pronouncements, See note 1 to our unaudited consolidated financial statements, which are included elsewhere in this report.

Item 3. Quantitative and Qualitative Disclosure about Market Risk

Market risk represents the risk of changes in the value of market risk sensitive instruments caused by fluctuations in interest rates and commodity prices. Changes in these factors could cause fluctuations in the results of our operations and cash flows. In the ordinary course of business, we are primarily exposed to changes in commodity prices, interest rates and foreign currency exchange rates. To manage the volatility related to these exposures, we use various financial instruments, including some derivatives, to help us manage our metal price, gas price, energy price, and interest rate risk. We also use offsetting forward sale and purchase agreements to help mitigate commodity price risks on operating margins. These agreements generally do not contain minimum purchase requirements.

We do not use derivative instruments for trading or speculative purposes and have not elected to use hedge accounting. We manage counterparty credit risk by entering into derivative instruments only with counterparties with investment-grade credit ratings.

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The following tables set forth the impact of a 10% price change on our hedging positions as of June 30, 2013 and December 31, 2012, respectively.

(in millions)									Impact of 10%
							Unrealized		price change
June 30, 2013	Nominal value			Fair value			gains		on fair value
Metals	$	(12.7	)	$	(12.3	)	$	0.4	$	1.2
Natural Gas		—			—			—		—
Electricity		0.2			0.3			0.1		—
Interest Rate Caps		—			—			—		—
Totals	$	(12.5	)	$	(12.0	)	$	0.5	$	1.2
December 31, 2012	Nominal value			Fair value			Unrealized gains		Impact of 10% price change on fair value
Metals	$	14.0		$	14.4		$	0.4	$	1.4
Natural Gas		0.2			0.2			—		—
Electricity		1.3			1.5			0.2		0.2
Interest Rate Caps		—			—			—		—
Totals	$	15.5		$	16.1		$	0.6	$	1.6

Item 4. Controls and Procedures

(a) Evaluation of disclosure controls and procedures

Under applicable SEC regulations, management of a reporting company, with the participation of the principal executive officer and principal financial officer, must periodically evaluate the company’s “disclosure controls and procedures,” which are defined generally as controls and other procedures of a reporting company designed to ensure that information required to be disclosed by the reporting company in its periodic reports filed with the SEC (such as this Form 10-Q) is i) recorded, processed, summarized, and reported on a timely basis, and ii) accumulated and communicated to management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosures.

The Company’s management, with the participation of the Chief Executive Officer and the Chief Financial Officer, carried out an evaluation of the effectiveness of the design and operation of the disclosure controls and procedures as of June 30, 2013. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that, as of June 30, 2013, the design and operation of our disclosure controls and procedures were effective to provide reasonable assurance that the desired control objectives were achieved.

(b) Changes in internal controls

There was no change in our internal control over financial reporting that occurred during the quarter ended June 30, 2013 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II— OTHER INFORMATION

Item 1. Legal Proceedings

We are currently and from time to time involved in a variety of claims, lawsuits and other disputes arising in the ordinary course of business, none of which management currently believes are, or will be, material to our business.

Item 1A. Risk Factors

Other than discussed below, there have been no material changes to the disclosure related to risk factors made in our Amendment No. 9 to Form S-1 Registration Statement filed with the Securities and Exchange Commission on May 22, 2013.

The following risk factor should also be considered in connection with evaluating our business and the forward-looking information contained in this Quarterly Report on Form 10-Q.

Adverse developments in our relationship with our employees could have a material adverse effect on our business, financial condition, results of operations and cash flows.

As of December 31, 2012, we had 1,986 employees, 1,118, or approximately 56%, of whom at various sites were members of unions. We have generally maintained good relationships with all unions and employees, which has been an important aspect of our ability to be competitive in our industry. As of December 31, 2012, there were nine unions representing employees in the Olin Brass segment (eight representing employees at the East Alton, Illinois facility and one representing employees of Bryan Metals, LLC), two representing employees of the A.J. Oster segment (one representing employees of A.J. Oster Foils, LLC and another representing employees of A.J.O. Global Services Mexico S.A. de C.V.) and one representing employees of the Chase Brass segment. In July 2012, employees at the Olin Brass Somers Thin Strip facility elected a union representative, and the election was certified by the National Labor Relations Board on July 27, 2012. On April 2, 2013, Somers Thin Strip employees ratified a collective bargaining agreement. That agreement took effect on April 3, 2013 and expires on December 15, 2015. The collective bargaining agreement with the eight unions that represent employees at the East Alton facility of Olin Brass expires in November 2013. The collective bargaining agreement covering union-represented employees of Chase Brass was scheduled to expire in June 2013. Chase Brass has begun negotiations with the union over terms and conditions of a collective bargaining agreement, and negotiations are continuing. The collective bargaining agreement was extended through July 31, 2013 and automatically extended for an indefinite period thereafter subject to termination upon 30 days’ written notice by either party. The union has not yet provided any notice to terminate the agreement. The collective bargaining agreement covering union-represented employees of A.J. Oster Foils expires in January 2014. The collective bargaining agreement covering union-represented employees of A.J.O. Global Services Mexico S.A. de C.V. has an indeterminate term, with a review of wages every year and a review of benefits every other year. The collective bargaining agreement with the union-represented employees of Bryan Metals, LLC is effective through September 30, 2014. The current collective bargaining agreements that are in place are a meaningful determinant of our labor costs and are very important to our ability to maintain flexibility to fulfill our customers’ needs. As we attempt to renew our collective bargaining agreements, labor negotiations may not conclude successfully and, in that case, may result in a significant increase in the cost of labor or may result in work stoppages or labor disturbances, disrupting our operations. Any such cost increases, stoppages or disturbances could have a material adverse effect on our business, financial condition, results of operations and cash flows by limiting plant production, sales volumes and profitability.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Sales of Unregistered Securities

None.

Purchases of Equity Securities

None.

Limitations Upon the Payment of Dividends

Both the ABL Facility and the 9.50% Senior Secured Notes due 2019 contain restrictions as to the payment of dividends. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources” for further discussion of these restrictive covenants.

Use of Proceeds

On May 29, 2013, we closed our initial public offering of 8,050,000 shares of our common stock, including 1,050,000 shares of our common stock sold in connection with the full exercise of the option to purchase additional shares granted to the underwriters, at a price to the public of $11.00 per share. The offering was made pursuant to a Registration Statement on Form S-1 (Registration No. 333-177594), which was declared effective by the Securities and Exchange Commission on May 22, 2013. The shares began trading on the New York Stock Exchange on May 23, 2013 and trade under the ticker symbol “BRSS.” Goldman, Sachs & Co., Morgan Stanley, William Blair and KeyBanc Capital Markets acted as underwriters for the offering, with Goldman, Sachs & Co. and Morgan Stanley acting as representatives for the underwriters.

Approximately $77.7 million was raised in the initial public offering after deducting $10.8 million in underwriting discounts, expenses and transaction costs. All of the shares of common stock sold in the offering, including those subject to the underwriters’ option to purchase additional shares, were sold by the selling stockholder, Halkos Holdings LLC. We did not receive any proceeds from the offering and we were reimbursed by Halkos for expenses incurred in connection with the initial public offering. Of the proceeds from the offering, $8.9 million was paid to members of our management.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

None.

Item 5. Other Information

None.

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Item 6. Exhibits

Exhibit Number	Description
3.1†	Amended and Restated Certificate of Incorporation of Global Brass and Copper Holdings, Inc. (incorporated by reference to Exhibit 3.1 of the Company’s Registration Statement on Form S-1 Amendment No. 6, filed May 8, 2013).
3.2†	Amended and Restated Bylaws of Global Brass and Copper Holdings, Inc. (incorporated by reference to Exhibit 3.2 of the Company’s Registration Statement on Form S-1 Amendment No. 6, filed May 8, 2013).
4.1†	Form of Certificate of Common Stock of Global Brass and Copper Holdings, Inc. (incorporated by reference to Exhibit 4.1 of the Company’s Registration Statement on Form S-1 Amendment No. 6, filed May 8, 2013).
10.1†	Global Brass and Copper Holdings, Inc. 2013 Omnibus Equity Incentive Plan (incorporated by reference to Exhibit 10.1 of the Company’s Registration Statement on Form S-1 Amendment No. 6, filed May 8, 2013).
10.18†	Form of Indemnity Agreement (incorporated by reference to Exhibit 10.18 of the Company’s Registration Statement on Form S-1 Amendment No. 6, filed May 8, 2013).
10.19†	Form of Investor Rights Agreement (incorporated by reference to Exhibit 10.19 of the Company’s Registration Statement on Form S-1 Amendment No. 6, filed May 8, 2013).
31.1	Certification of Chief Executive Officer under Section 302 of the Sarbanes-Oxley Act of 2002*
31.2	Certification of Chief Financial Officer under Section 302 of the Sarbanes-Oxley Act of 2002*
32.1	Certification of Chief Executive Officer and Chief Financial Officer under Section 906 of the Sarbanes-Oxley Act of 2002**
101	The following materials from Global Brass and Copper Holdings, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2013 formatted in XBRL (eXtensible Business Reporting Language): (i) the Condensed Consolidated Statement of Income, (ii) the Condensed Consolidated Statement of Comprehensive Income, (iii) the Condensed Consolidated Statement of Cash Flows, (iv) the Condensed Consolidated Balance Sheet, (v) the Condensed Consolidated Statement of Equity, and (vi) Notes to the Condensed Consolidated Financial Statements.*

* Filed herewith

** Furnished herewith

† Previously filed

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

GLOBAL BRASS AND COPPER HOLDINGS, INC
By:	/s/ Robert T. Micchelli
	Robert T. Micchelli
	Chief Financial Officer

Date: August 12, 2013

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EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, John H. Walker, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Global Brass and Copper Holdings, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstance under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly represent in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(c) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 12, 2013

/s/ John H. Walker

John H. Walker

Chief Executive Officer and Director

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Robert T. Micchelli, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Global Brass and Copper Holdings, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstance under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly represent in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(c) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 12, 2013

/s/ Robert T. Micchelli

Robert T. Micchelli

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Global Brass and Copper Holdings, Inc. (the “Company”) on Form 10-Q for the period ending June 30, 2013, as filed with the Securities and Exchange Commission (the “Report”), and pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, each of the undersigned hereby certifies that to the best of their knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 12, 2013

/s/ John H. Walker

John H. Walker

Chief Executive Officer and Director

/s/ Robert T. Micchelli

Robert T. Micchelli

Chief Financial Officer

This written statement accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Income Taxes

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Income Taxes

9. Income Taxes

The effective income tax rate, which is provision for (benefit from) income taxes as a percentage of income (loss) before provision for (benefit from) income taxes and equity income, differs from the amount determined by applying the applicable U.S. statutory federal income tax rate to pretax results primarily as a result of the following:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Statutory provision rate		35.0	%		35.0	%		35.0	%		35.0	%
Permanent differences and other items
State tax provision		(5.4	%)		4.0	%		19.2	%		1.2	%
Section 199 manufacturing credit		5.0	%		(1.7	%)		(16.4	%)		(0.5	%)
Return to provision adjustments / Uncertain tax positions		0.6	%		3.1	%		(2.5	%)		(69.0	%)
Non-deductible non-cash compensation		(92.0	%)		(36.2	%)		169.1	%		838.2	%
Other		(1.3	%)		0.4	%		2.0	%		(9.0	%)
Effective income tax rate		(58.1	%)		4.6	%		206.4	%		795.9	%

The “Non-deductible non-cash compensation” expense as described further in note 14, “Profits Interest Awards,” is not deductible in the Company’s tax returns and has been reflected as a permanent difference in the effective tax rate reconciliations above.

As of June 30, 2013 and December 31, 2012, the Company had $27,314 and $27,401 respectively, of unrecognized tax benefits, none of which would impact the effective tax rate, if recognized. Estimated interest and penalties related to the underpayment of income taxes were $16 and $15 for the three and six months ended June 30, 2013, respectively, and were reduced by $179 and $160 for the three and six months ended June 30, 2012, respectively, and are classified as a component of income tax expense in the accompanying consolidated statements of operations. Accrued interest and penalties as of June 30, 2013 and December 31, 2012 were $51 and $35, respectively, inclusive of the estimated interest and penalties mentioned above. The Company’s liability for uncertain tax positions of $27,365 and $27,436 at June 30, 2013 and December 31, 2012, respectively, are presented in other noncurrent liabilities.

The Company is subject to income taxation in several jurisdictions around the world. Management believes that an adequate provision has been made for any adjustments that may result from tax examinations. However, the outcome of tax audits cannot be predicted with certainty. If any issues addressed in the Company’s tax audits are resolved in a manner not consistent with management’s expectations, the Company could be required to adjust its provision for income tax in the period such resolution occurs. Although timing of the resolution and/or closure of audits is not certain, the Company believes it has adequately reserved for any potential tax exposures at June 30, 2013. The Internal Revenue Service completed its examination of the Corporation’s income tax returns through the period ended December 31, 2010. The Company’s U.S. federal returns for the period ended December 31, 2011 and all subsequent periods remain open for audit. The majority of state returns for the period ended September 30, 2010 and all subsequent periods remain open for audit.

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Income Taxes - Summary of Effective Income Tax Rate (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Statutory provision rate	35.00%	35.00%	35.00%	35.00%
Permanent differences and other items
State tax provision	(5.40%)	4.00%	19.20%	1.20%
Section 199 manufacturing credit	5.00%	(1.70%)	(16.40%)	(0.50%)
Return to provision adjustments / Uncertain tax positions	0.60%	3.10%	(2.50%)	(69.00%)
Non-deductible non-cash compensation	(92.00%)	(36.20%)	169.10%	838.20%
Other	(1.30%)	0.40%	(2.00%)	(9.00%)
Effective income tax rate	(58.10%)	4.60%	206.40%	795.90%

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Condensed Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Net sales	$ 461,478	$ 416,979	$ 906,440	$ 860,370
Cost of sales	409,778	369,858	807,824	763,295
Gross profit	51,700	47,121	98,616	97,075
Selling, general and administrative expenses (including non-cash profits interest expense of $29,271, $19,517, $29,271 and $19,517, respectively)	52,855	37,965	72,533	55,888
Operating (loss) income	(1,155)	9,156	26,083	41,187
Interest expense	9,959	10,209	19,834	19,958
Loss on extinguishment of debt		19,612		19,612
Other expense, net	4	398	191	709
(Loss) income before provision for (benefit from) income taxes and equity income	(11,118)	(21,063)	6,058	908
Provision for (benefit from) income taxes	6,461	(971)	12,503	7,227
Loss before equity income	(17,579)	(20,092)	(6,445)	(6,319)
Equity income, net of tax	508	201	860	475
Net loss	(17,071)	(19,891)	(5,585)	(5,844)
Less: Net income attributable to noncontrolling interest	61	114	159	168
Net loss attributable to Global Brass and Copper Holdings, Inc.	$ (17,132)	$ (20,005)	$ (5,744)	$ (6,012)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$ (0.81)	$ (0.95)	$ (0.27)	$ (0.28)
Diluted	$ (0.81)	$ (0.95)	$ (0.27)	$ (0.28)
Weighted average common shares outstanding:
Basic	21,110,000	21,110,000	21,110,000	21,110,000
Diluted	21,110,000	21,110,000	21,110,000	21,110,000

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Inventories

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Inventories

2. Inventories

The Company’s inventories are as follows:

	As of
	June 30, 2013		December 31, 2012
Raw materials and supplies	$	37,111	$	37,766
Work-in-process		83,811		69,286
Finished goods		78,627		67,326
Total inventories	$	199,549	$	174,378

Inventories include costs attributable to direct labor and manufacturing overhead but are primarily comprised of raw material costs. The material component of inventories that is valued on a last-in, first-out (“LIFO”) basis comprises approximately 72% and 70% of total inventory at June 30, 2013 and December 31, 2012, respectively. Other manufactured inventories, including the non-material components and certain non-U.S. inventories, are valued on a first-in, first-out (“FIFO”) basis. During the second quarter of 2013, the Company reduced the recorded value of inventory by $318. This non-cash, lower of cost or market adjustment was recorded in cost of sales in the accompanying consolidated statement of operations.

If all inventories had been valued at period-end market values, inventories would have been approximately $303,937 and $319,282 at June 30, 2013 and December 31, 2012, respectively.

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Earnings Per Share

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

16. Earnings Per Share

Basic earnings per share is computed based on the weighted-average number of common shares outstanding and diluted earnings per share is computed based on the weighted-average number of common shares outstanding adjusted by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued. Potentially dilutive securities include stock options and nonvested share awards. Nonvested performance-based share awards are included in the average diluted shares outstanding for each period if established performance criteria have been met at the end of the respective periods.

The following table sets forth the computation of basic and diluted earnings per share attributable to the Company:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Numerator
Net loss attributable to Global Brass and Copper Holdings, Inc.	$	(17,132	)	$	(20,005	)	$	(5,744	)	$	(6,012	)
Denominator
Weighted-average common shares outstanding		21,110,000			21,110,000			21,110,000			21,110,000
Effect of potentially dilutive securities: Stock options and nonvested share awards		—			—			—			—
Weighted-average common shares outstanding, assuming dilution		21,110,000			21,110,000			21,110,000			21,110,000
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)
Diluted	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)

In the second quarter of 2013, the Company granted 104,444 options to purchase shares of common stock, 136,080 nonvested shares of restricted stock, and 98,441 nonvested performance-based shares to certain members of the Company’s management and its Board of Directors. For the three months and six months ended June 30, 2013, the dilutive effect of 8,555 shares and 4,278 shares, respectively, of nonvested restricted stock was excluded from the earnings per share calculation as they would be anti-dilutive given the loss in the periods.

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Earnings Per Share - Additional Information (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Earnings Per Share [Line Items]
Options granted to purchase of common stock	104,444
Diluted effect	8,555	4,278
Restricted Stock [Member]
Earnings Per Share [Line Items]
Nonvested shares issued to members and directors	136,080	136,080
Performance Shares [Member]
Earnings Per Share [Line Items]
Nonvested shares issued to members and directors	98,441	98,441

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Derivative Contracts - Effects of Derivative Contracts in Condensed Consolidated Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended		6 Months Ended							3 Months Ended		6 Months Ended						3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 cost of sales, overstated/understated amount [Member]	Jun. 30, 2013 cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 cost of sales, overstated/understated amount [Member]	Jun. 30, 2013 Prepaid Expenses and Other Current Assets [Member]	Dec. 31, 2012 Prepaid Expenses and Other Current Assets [Member]	Dec. 31, 2012 Other Noncurrent Assets [Member]	Jun. 30, 2013 Open metal contracts [Member]	Dec. 31, 2012 Open metal contracts [Member]	Jun. 30, 2013 Open metal contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Open metal contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2013 Open metal contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Open metal contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2013 Open electricity contracts [Member]	Dec. 31, 2012 Open electricity contracts [Member]	Jun. 30, 2013 Interest rate cap agreements [Member]	Dec. 31, 2012 Interest rate cap agreements [Member]	Jun. 30, 2012 Interest rate cap agreements [Member] Interest Expense [Member]	Jun. 30, 2013 Interest rate cap agreements [Member] Interest Expense [Member]	Jun. 30, 2012 Interest rate cap agreements [Member] Interest Expense [Member]	Dec. 31, 2012 Open natural gas contracts [Member]	Jun. 30, 2012 Natural gas contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2013 Natural gas contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Natural gas contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2013 Electricity contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Electricity contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2013 Electricity contracts [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Electricity contracts [Member] cost of sales, overstated/understated amount [Member]
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	$ 2,032	$ 775								$ 1,953	$ 603					$ 79	$ 169		$ 1				$ 2
Gross Amounts Offset in Consolidated Balance Sheet	(1,574)	(226)								(1,574)	(224)						(2)
Net Amounts of Assets Presented in Consolidated Balance Sheet	458	549								379	379					79	167		1				2
Amount Not Offset in the Consolidated Balance Sheet, Financial Instruments
Amount Not Offset in the Consolidated Balance Sheet, Cash Collateral Received
Net Amount	458	549								379	379					79	167		1				2
Derivative Asset	458	549					458	548	1
Gross Amounts of Recognized Liabilities	1,574	226								1,574	224						2
Gross Amounts Offset in Consolidated Balance Sheet	(1,574)	(226)								(1,574)	(224)						(2)
Net Amounts of Liabilities Presented in Consolidated Balance Sheet
Amount Not Offset in the Consolidated Balance Sheet, Financial Instruments
Amount Not Offset in the Consolidated Balance Sheet, Cash Collateral Deposited	267	767
Net Amount
Realized and unrealized gain (loss)			469	(425)	564	538						634	(606)	651	504									34	(2)	69	(165)	147	(85)	(35)
Unrealized loss																				$ (12)	$ (1)	$ (146)

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Derivative Contracts

6 Months Ended

Jun. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Contracts

10. Derivative Contracts

The Company maintains a metal, natural gas and electricity pricing risk-management strategy that uses commodity derivative contracts to minimize significant, unanticipated gains or losses and cash fluctuations that may arise from volatility of the commodity indices.

The Company’s commodity derivative contracts consist of delivery contracts matched in quantity, price and maturity to firm price sales orders, in circumstances where physical firm price metal is unavailable, in order to protect sales margins from metal price fluctuations between the firm price sale order date and shipment date.

The prices of natural gas and electricity can be particularly volatile. As a result, our natural gas and electricity costs may fluctuate dramatically. The Company attempts to mitigate short-term volatility in natural gas and electricity costs through the use of derivatives contracts in an effort to offset the effect of increasing costs.

The Company also utilized interest rate cap agreements in compliance with the requirement under its prior senior secured term loan credit facility (the “Term Loan Facility”) to provide that at least 50% of the term loan be subject to a fixed rate or interest rate protection for a period of not less than three years. In June 2012, the Term Loan Facility was repaid and retired. During 2010, the Company entered into three-year interest rate cap agreements that capped the interest rate on $300,000 of the aggregate principal outstanding. The interest rate cap agreements are not designated as an accounting hedge and changes in the fair value of the interest rate cap agreements are recorded as non-cash interest expense.

By using derivative contracts to limit exposures to fluctuations in metal, natural gas and electricity prices and interest rate movements, the Company exposes itself to credit risk and market risk. Credit risk is the risk that the counterparty might fail to fulfill its performance obligations under the terms of the derivative contract. Market risk is the risk that the value of a derivative instrument might be adversely affected by a change in commodity price or interest rates. The Company manages the market risk associated with derivative contracts by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken.

The Company only executes derivative instruments with counterparties with investment-grade credit ratings. These counterparties expose the Company to credit risk in the event of non-performance. The amount of such exposure is limited to the fair value of the derivative contract plus the unpaid portion of amounts due to the Company pursuant to terms of the derivative contracts, if any. If a downgrade in the credit rating of these counterparties occurs, management believes that this exposure is mitigated by provisions in the derivative arrangements which allow for the legal right of offset of any amounts due to the Company from the counterparties with any amounts payable to the counterparties by the Company.

The fair values of derivative contracts in the consolidated balance sheet include the impact of netting derivative assets and liabilities when a legally enforceable master netting arrangement exists. The following tables summarize the gross amounts of recognized derivative assets and liabilities, the net amounts presented in the consolidated balance sheet, and the net amounts after deducting collateral that has been deposited with counterparties:

	As of June 30, 2013
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Assets		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Assets Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amount
Open metal contracts	$	1,953	$	(1,574	)	$	379	$	—	$	—	$	379
(334 contracts)
Open electricity contracts		79		—			79		—		—		79
(6 contracts)
Interest rate cap agreements		—		—			—		—		—		—
(2 contracts)
Total	$	2,032	$	(1,574	)	$	458	$	—	$	—	$	458
Consolidated balance sheet location:
Prepaid expenses and other current assets			$	458
Total			$	458
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Liabilities Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Deposited		Net Amount
Open metal contracts	$	1,574	$	(1,574	)	$	—	$	—	$	—	$	—
(218 contracts)
Total	$	1,574	$	(1,574	)	$	—	$	—	$	—	$	—

Not included in the above table is $267 of collateral included in prepaid expenses and other current assets, which is because collateral is limited to the net amounts of assets or liabilities presented in the consolidated balance sheet.

	As of December 31, 2012
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Assets		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Assets Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amount
Open metals contracts	$	603	$	(224	)	$	379	$	—	$	—	$	379
(208 contracts)
Open natural gas contracts		2		—			2		—		—		2
(6 contracts)
Open electricity contracts		169		(2	)		167		—		—		167
(17 contracts)
Interest rate cap agreements		1		—			1		—		—		1
(2 contracts)
Total	$	775	$	(226	)	$	549	$	—	$	—	$	549
Consolidated balance sheet location:
Prepaid expenses and other current assets			$	548
Other noncurrent assets				1
Total			$	549
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Liabilities Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Deposited		Net Amount
Open metals contracts	$	224	$	(224	)	$	—	$	—	$	—	$	—
(85 contracts)
Open electricity contracts		2		(2	)		—		—		—		—
(1 contract)
Total	$	226	$	(226	)	$	—	$	—	$	—	$	—

Not included in the above table is $767 of collateral included in prepaid expenses and other current assets, which is because collateral is limited to the net amounts of assets or liabilities presented in the consolidated balance sheet.

The following table summarizes the effects of derivative contracts in the consolidated statements of operations:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Cost of sales
Realized and unrealized gain (loss)—metal contracts	$	634		$	(606	)	$	651		$	504
Realized and unrealized gain (loss)—natural gas contracts		—			34			(2	)		69
Realized and unrealized (loss) gain—electricity contracts		(165	)		147			(85	)		(35	)
Total	$	469		$	(425	)	$	564		$	538
Interest expense
Unrealized loss—interest rate cap agreements	$	—		$	(12	)	$	(1	)	$	(146	)

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Investment in Joint Venture - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Nov. 30, 2007
Schedule of Equity Method Investments [Line Items]
Cash dividends received, recorded as reduction in Company's investment in joint venture				$ 500
Equity income, net of tax	508	201	860	475
Dowa - Olin Metal Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Interest in joint venture	50.00%		50.00%
Carrying value as a result of bargain purchase event						0
Negative basis difference	5,373		5,373		5,735	9,416
Negative basis difference accreted on a straight-line basis Period			13 years
Accretion of negative basis difference	181	181	362	362
Cash dividends received, recorded as reduction in Company's investment in joint venture			0	500
Equity income, net of tax	508	201	860	475
Undistributed earnings of joint venture in retained earnings	$ 922		$ 922		$ 62

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Derivative Contracts - Effects of Derivative Contracts in Condensed Consolidated Financial Statements (Parenthetical) (Detail)	Jun. 30, 2013 Contract	Dec. 31, 2012 Contract
Open metal contracts [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	334	208
Number of contracts	218	85
Open electricity contracts [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	6	17
Number of contracts		1
Interest rate cap agreements [Member]
Derivatives, Fair Value [Line Items]
Number of contracts	2	2
Open natural gas contracts [Member]
Derivatives, Fair Value [Line Items]
Number of contracts		6

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Condensed Consolidating Financial Information (Tables)

6 Months Ended

Jun. 30, 2013

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Consolidating Balance Sheet

	Condensed Consolidating Balance Sheet
	As of June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current assets:
Cash	$	—		$	34,457		$	—	$	4,207	$	(4,654	)	$	34,010
Accounts receivable, net of allowance		—			4,815			182,082		16,443		—			203,340
Inventories		—			—			181,937		17,902		(290	)		199,549
Prepaid expenses and other current assets		—			10,030			14,925		195		(58	)		25,092
Deferred income taxes		—			31,760			—		—		—			31,760
Income tax receivable		—			2,147			—		—		—			2,147
Total current assets		—			83,209			378,944		38,747		(5,002	)		495,898
Property, plant and equipment, net		—			985			73,999		346		—			75,330
Investment in joint venture		—			—			2,168		—		—			2,168
Investment in subsidiaries		—			591,583			19,336		—		(610,919	)		—
Intercompany accounts		—			—			253,943		—		(253,943	)		—
Goodwill		—			—			4,399		—		—			4,399
Intangible assets, net		—			—			787		—		—			787
Deferred income taxes		—			6,826			—		—		—			6,826
Other noncurrent assets		—			15,878			916		—		—			16,794
Total assets	$	—		$	698,481		$	734,492	$	39,093	$	(869,864	)	$	602,202
Liabilities and (deficit) / equity
Current liabilities:
Accounts payable	$	—		$	290		$	108,410	$	3,283	$	(5,002	)	$	106,981
Accrued liabilities		—			17,494			34,455		736		—			52,685
Accrued interest		—			3,395			—		—		—			3,395
Income taxes payable		—			39			44		251		—			334
Total current liabilities		—			21,218			142,909		4,270		(5,002	)		163,395
Long-term debt		—			431,000			—		—		—			431,000
Other noncurrent liabilities		—			27,678			—		—		—			27,678
Obligations and advances in excess of investment in subsidiary		16,502			—			—		—		(16,502	)		—
Intercompany accounts		7,145			235,087			—		11,711		(253,943	)		—
Total liabilities		23,647			714,983			142,909		15,981		(275,447	)		622,073
Commitments and contingencies		—			—			—		—		—			—
Global Brass and Copper Holdings, Inc. stockholder’s (deficit) / equity		(23,647	)		(16,502	)		591,583		19,336		(594,417	)		(23,647	)
Noncontrolling interest		—			—			—		3,776		—			3,776
Total (deficit) / equity		(23,647	)		(16,502	)		591,583		23,112		(594,417	)		(19,871	)
Total liabilities and (deficit) / equity	$	—		$	698,481		$	734,492	$	39,093	$	(869,864	)	$	602,202

	Condensed Consolidating Balance Sheet
	As of December 31, 2012
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current assets:
Cash	$	—		$	8,537		$	—	$	5,446	$	(121	)	$	13,862
Accounts receivable, net of allowance		—			4,630			144,533		15,154		—			164,317
Inventories		—			343			158,713		15,885		(563	)		174,378
Prepaid expenses and other current assets		—			9,229			2,600		312		—			12,141
Deferred income taxes		—			33,465			—		—		—			33,465
Income tax receivable, net		—			1,656			—		—		(356	)		1,300
Total current assets		—			57,860			305,846		36,797		(1,040	)		399,463
Property, plant and equipment, net		—			1,154			69,646		327		—			71,127
Investment in joint venture		—			—			2,972		—		—			2,972
Investment in subsidiaries		—			522,912			19,850		—		(542,762	)		—
Intercompany accounts		—			—			223,081		—		(223,081	)		—
Goodwill		—			—			4,399		—		—			4,399
Intangible assets, net		—			—			839		—		—			839
Deferred income taxes		—			6,138			—		—		—			6,138
Other noncurrent assets		—			17,115			640		—		—			17,755
Total assets	$	—		$	605,179		$	627,273	$	37,124	$	(766,883	)	$	502,693
Liabilities and (deficit) / equity
Current liabilities:
Accounts payable	$	—		$	1,398		$	77,390	$	2,910	$	(121	)	$	81,577
Accrued liabilities		—			20,592			26,971		861		—			48,424
Accrued interest		—			3,287			—		—		—			3,287
Income taxes payable		—			248			—		356		(356	)		248
Total current liabilities		—			25,525			104,361		4,127		(477	)		133,536
Long-term debt		—			389,522			—		—		—			389,522
Other noncurrent liabilities		—			27,436			—		—		—			27,436
Obligations and advances in excess of investment in subsidiary		42,522			—			—		—		(42,522	)		—
Intercompany accounts		8,829			205,218			—		9,597		(223,644	)		—
Total liabilities		51,351			647,701			104,361		13,724		(266,643	)		550,494
Commitments and contingencies		—			—			—		—		—			—
Global Brass and Copper Holdings, Inc. stockholder’s (deficit) / equity		(51,351	)		(42,522	)		522,912		19,850		(500,240	)		(51,351	)
Noncontrolling interest		—			—			—		3,550		—			3,550
Total (deficit) / equity		(51,351	)		(42,522	)		522,912		23,400		(500,240	)		(47,801	)
Total liabilities and (deficit) / equity	$	—		$	605,179		$	627,273	$	37,124	$	(766,883	)	$	502,693

Consolidating Statement of Operations

	Condensed Consolidating Statement of Operations
	Three Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net sales	$	—		$	—		$	444,057		$	25,522	$	(8,101	)	$	461,478
Cost of sales		—			(415	)		394,201			24,093		(8,101	)		409,778
Gross profit		—			415			49,856			1,429		—			51,700
Selling, general and administrative expenses		4,802			24,512			22,840			701		—			52,855
Operating income (loss)		(4,802	)		(24,097	)		27,016			728		—			(1,155	)
Interest expense		—			9,959			—			—		—			9,959
Other (income) expense, net		—			97			(213	)		120		—			4
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(4,802	)		(34,153	)		27,229			608		—			(11,118	)
Provision for (benefit from) income taxes		(1,848	)		(4,553	)		12,446			416		—			6,461
Income (loss) before equity income (loss)		(2,954	)		(29,600	)		14,783			192		—			(17,579	)
Equity income (loss), net of tax		(14,178	)		15,422			639			—		(1,375	)		508
Net income (loss)		(17,132	)		(14,178	)		15,422			192		(1,375	)		(17,071	)
Less: Net income attributable to noncontrolling interest		—			—			—			61		—			61
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(17,132	)	$	(14,178	)	$	15,422		$	131	$	(1,375	)	$	(17,132	)

	Condensed Consolidating Statement of Operations
	Three Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net sales	$	—		$	—		$	397,588	$	24,807		$	(5,416	)	$	416,979
Cost of sales		—			654			352,200		22,420			(5,416	)		369,858
Gross profit (loss)		—			(654	)		45,388		2,387			—			47,121
Selling, general and administrative expenses		440			17,459			19,389		677			—			37,965
Operating income (loss)		(440	)		(18,113	)		25,999		1,710			—			9,156
Interest expense		—			10,209			—		—			—			10,209
Loss on extinguishment of debt		—			19,612			—		—			—			19,612
Other (income) expense, net		—			530			67		(199	)		—			398
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(440	)		(48,464	)		25,932		1,909			—			(21,063	)
Provision for (benefit from) income taxes		(169	)		(14,784	)		14,300		(318	)		—			(971	)
Income (loss) before equity income (loss)		(271	)		(33,680	)		11,632		2,227			—			(20,092	)
Equity income (loss), net of tax		(19,734	)		13,946			2,314		—			3,675			201
Net income (loss)		(20,005	)		(19,734	)		13,946		2,227			3,675			(19,891	)
Less: Net income attributable to noncontrolling interest		—			—			—		114			—			114
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(20,005	)	$	(19,734	)	$	13,946	$	2,113		$	3,675		$	(20,005	)

	Condensed Consolidating Statement of Operations
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net sales	$	—		$	—		$	872,130		$	48,498	$	(14,188	)	$	906,440
Cost of sales		—			116			777,054			44,842		(14,188	)		807,824
Gross profit		—			(116	)		95,076			3,656		—			98,616
Selling, general and administrative expenses		5,188			28,856			37,056			1,433		—			72,533
Operating income (loss)		(5,188	)		(28,972	)		58,020			2,223		—			26,083
Interest expense		—			19,834			—			—		—			19,834
Other (income) expense, net		—			187			(83	)		87		—			191
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(5,188	)		(48,993	)		58,103			2,136		—			6,058
Provision for (benefit from) income taxes		(1,997	)		(9,953	)		23,690			763		—			12,503
Income (loss) before equity income (loss)		(3,191	)		(39,040	)		34,413			1,373		—			(6,445	)
Equity income (loss), net of tax		(2,553	)		36,487			2,074			—		(35,148	)		860
Net income (loss)		(5,744	)		(2,553	)		36,487			1,373		(35,148	)		(5,585	)
Less: Net income attributable to noncontrolling interest		—			—			—			159		—			159
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(5,744	)	$	(2,553	)	$	36,487		$	1,214	$	(35,148	)	$	(5,744	)

	Condensed Consolidating Statement of Operations
	Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net sales	$	—		$	—		$	829,135		$	44,619		$	(13,384	)	$	860,370
Cost of sales		—			(1,905	)		738,120			40,464			(13,384	)		763,295
Gross profit		—			1,905			91,015			4,155			—			97,075
Selling, general and administrative expenses		735			21,812			32,044			1,297			—			55,888
Operating income (loss)		(735	)		(19,907	)		58,971			2,858			—			41,187
Interest expense (income)		—			19,961			(3	)		—			—			19,958
Loss on extinguishment of debt		—			19,612			—			—			—			19,612
Other (income) expense, net		—			597			251			(139	)		—			709
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(735	)		(60,077	)		58,723			2,997			—			908
Provision for (benefit from) income taxes		(283	)		(19,161	)		26,662			9			—			7,227
Income (loss) before equity income (loss)		(452	)		(40,916	)		32,061			2,988			—			(6,319	)
Equity income (loss), net of tax		(5,560	)		35,356			3,295			—			(32,616	)		475
Net income (loss)		(6,012	)		(5,560	)		35,356			2,988			(32,616	)		(5,844	)
Less: Net income attributable to noncontrolling interest		—			—			—			168			—			168
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,012	)	$	(5,560	)	$	35,356		$	2,820		$	(32,616	)	$	(6,012	)

Consolidating Statement of Comprehensive Income

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Three Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net income (loss)	$	(17,132	)	$	(14,178	)	$	15,422		$	192		$	(1,375	)	$	(17,071	)
Foreign currency translation adjustment, net of tax		(489	)		(489	)		(803	)		(177	)		1,518			(440	)
Comprehensive income (loss)		(17,621	)		(14,667	)		14,619			15			143			(17,511	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			110			—			110
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(17,621	)	$	(14,667	)	$	14,619		$	(95	)	$	143		$	(17,621	)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Three Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated
Net income (loss)	$	(20,005	)	$	(19,734	)	$	13,946		$	2,227		$	3,675	$	(19,891	)
Foreign currency translation adjustment, net of tax		(148	)		(148	)		(227	)		(520	)		900		(143	)
Comprehensive income (loss)		(20,153	)		(19,882	)		13,719			1,707			4,575		(20,034	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			119			—		119
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(20,153	)	$	(19,882	)	$	13,719		$	1,588		$	4,575	$	(20,153	)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	(5,744	)	$	(2,553	)	$	36,487		$	1,373	$	(35,148	)	$	(5,585	)
Foreign currency translation adjustment, net of tax		(879	)		(879	)		(1,462	)		209		2,199			(812	)
Comprehensive income (loss)		(6,623	)		(3,432	)		35,025			1,582		(32,949	)		(6,397	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			226		—			226
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,623	)	$	(3,432	)	$	35,025		$	1,356	$	(32,949	)	$	(6,623	)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	(6,012	)	$	(5,560	)	$	35,356		$	2,988	$	(32,616	)	$	(5,844	)
Foreign currency translation adjustment, net of tax		(145	)		(145	)		(222	)		799		(410	)		(123	)
Comprehensive income (loss)		(6,157	)		(5,705	)		35,134			3,787		(33,026	)		(5,967	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			190		—			190
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,157	)	$	(5,705	)	$	35,134		$	3,597	$	(33,026	)	$	(6,157	)

Consolidating Statement of Cash Flows

	Condensed Consolidating Statement of Cash Flows
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities
Net cash provided by (used in) operating activities	$	—		$	(15,558	)	$	8,103		$	935		$	(11,408	)	$	(17,928	)
Cash flows from investing activities
Capital expenditures		—			—			(8,268	)		(37	)		—			(8,305	)
Payable to subsidiaries		(4,875	)		—			—			—			4,875			—
Proceeds from sale of property, plant and equipment		—			—			165			4			—			169
Net cash provided by (used in) investing activities		(4,875	)		—			(8,103	)		(33	)		4,875			(8,136	)
Cash flows from financing activities
Borrowings on ABL Facility		—			229,787			—			—			—			229,787
Payments on ABL Facility		—			(188,309	)		—			—			—			(188,309	)
Distribution to stockholder		—			—			—			(2,000	)		2,000			—
Net payments (amounts due) from stockholder		4,875			—			—			—			—			4,875
Net cash provided by (used in) financing activities		4,875			41,478			—			(2,000	)		2,000			46,353
Effect of foreign currency exchange rate changes		—			—			—			(141	)		—			(141	)
Net increase (decrease) in cash		—			25,920			—			(1,239	)		(4,533	)		20,148
Cash at beginning of period		—			8,537			—			5,446			(121	)		13,862
Cash at end of period	$	—		$	34,457		$	—		$	4,207		$	(4,654	)	$	34,010

	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities
Net cash provided by (used for) operating activities	$	73,624		$	25,672		$	6,649		$	(999	)	$	(74,609	)	$	30,337
Cash flows from investing activities
Capital expenditures		—			(549	)		(6,655	)		(18	)		—			(7,222	)
Capital distributions from subsidiary		86,376			—			—						(86,376	)		—
Payable to subsidiaries		2,161			—			—			—			(2,161	)		—
Proceeds from sale of property, plant and equipment		—			—			6			—			—			6
Net cash provided by (used in) investing activities		88,537			(549	)		(6,649	)		(18	)		(88,537	)		(7,216	)
Cash flows from financing activities
Deferred financing fees		—			(12,926	)		—			—			—			(12,926	)
Proceeds from senior secured notes		—			375,000			—			—			—			375,000
Payments on term loan		—			(310,875	)		—			—			—			(310,875	)
Borrowings on ABL Facility		—			81,586			—			—			—			81,586
Payments on ABL Facility		—			(30,913	)		—			—			—			(30,913	)
Distribution to stockholder		(160,000	)		(160,000	)		—			—			160,000			(160,000	)
Amounts due from stockholder		(2,161	)		—			—			—			—			(2,161	)
Net cash used in financing activities		(162,161	)		(58,128	)		—			—			160,000			(60,289	)
Effect of foreign currency exchange rate changes		—			—			—			(207	)		—			(207	)
Net decrease in cash		—			(33,005	)		—			(1,224	)		(3,146	)		(37,375	)
Cash at beginning of period		—			45,302			—			4,648			(413	)		49,537
Cash at end of period	$	—		$	12,297		$	—		$	3,424		$	(3,559	)	$	12,162

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Basis of Presentation and Principles of Consolidation (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Summary of Revisions to Consolidated Financial Statements

A summary of the revisions to the consolidated financial statements as of June 30, 2012 and for the three and six months ended June 30, 2012 is as follows:

	As Previously Reported			Adjustment			As Revised
	June 30, 2012
Consolidated Balance Sheet
Accounts receivable, net of allowance	$	192,326		$	984		$	193,310
Inventories		180,815			(811	)		180,004
Deferred income tax assets—current		28,079			1,264			29,343
Income tax receivable		4,996			(476	)		4,520
Total current assets		429,443			961			430,404
Deferred income tax assets—noncurrent		19,917			(260	)		19,657
Total assets		538,522			701			539,223
Accounts payable		105,981			(1,396	)		104,585
Accrued liabilities		39,590			984			40,574
Total current liabilities		148,919			(412	)		148,507
Total liabilities		605,586			(412	)		605,174
Accumulated deficit		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit		(70,422	)		1,113			(69,309	)
Total deficit		(67,064	)		1,113			(65,951	)
Total liabilities and deficit		538,522			701			539,223
	Three Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	371,213		$	(1,355	)	$	369,858
Gross profit		45,766			1,355			47,121
Operating income		7,801			1,355			9,156
Loss before benefit from income taxes and equity income		(22,418	)		1,355			(21,063	)
Benefit from income taxes		(1,247	)		276			(971	)
Loss before equity income		(21,171	)		1,079			(20,092	)
Net loss		(20,970	)		1,079			(19,891	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(21,084	)		1,079			(20,005	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(1.00	)	$	0.05		$	(0.95	)

	As Previously Reported			Adjustment			As Revised
	Six Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	763,914		$	(619	)	$	763,295
Gross profit		96,456			619			97,075
Operating income		40,568			619			41,187
Income before provision for income taxes and equity income		289			619			908
Provision for income taxes		7,221			6			7,227
Loss before equity income		(6,932	)		613			(6,319	)
Net loss		(6,457	)		613			(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.31	)	$	0.03		$	(0.28	)
	Three Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(20,970	)	$	1,079		$	(19,891	)
Comprehensive loss		(21,113	)		1,079			(20,034	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(21,232	)		1,079			(20,153	)
	Six Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(6,457	)	$	613		$	(5,844	)
Comprehensive loss		(6,580	)		613			(5,967	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(6,770	)		613			(6,157	)
	Six Months Ended June 30, 2012
Consolidated Statement of Changes in Deficit
Net loss	$	(6,457	)	$	613		$	(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Accumulated deficit—Balance, June 30, 2012		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit—Balance, June 30, 2012		(70,422	)		1,113			(69,309	)
Total deficit—Balance, June 30, 2012		(67,064	)		1,113			(65,951	)

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Condensed Consolidating Financial Information

6 Months Ended

Jun. 30, 2013

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Condensed Consolidating Financial Information

18. Condensed Consolidating Financial Information

In June 2012, Holdings (presented as “Parent” in the following tables), through its wholly-owned principal operating subsidiary, GBC (presented as “Issuer” in the following tables), issued Senior Secured Notes as further described in note 8, “Financing”. The Senior Secured Notes are jointly and severally guaranteed on a senior secured basis by Holdings and substantially all existing 100%-owned U.S. subsidiaries of GBC and any future restricted subsidiaries (which are set forth in

more detail in the Indenture) who guarantee or incur certain types of Permitted Debt under the Indenture (collectively, the “Guarantors”). The guarantees are full and unconditional, except that a Guarantor can be automatically released and relieved of its obligations under certain customary provisions contained in the Indenture. Under these customary provisions, a Guarantor is automatically released from its obligations as a guarantor upon the sale of the Guarantor or substantially all of its assets to a third party, the designation of the Guarantor as an unrestricted subsidiary in accordance with the terms of the Indenture, the release or discharge of all guarantees by such Guarantor and the repayment of all indebtedness, or upon the Issuer’s exercise of its legal defeasance option or covenant defeasance option or if the obligations under the Indenture are discharged in accordance with the terms of the Indenture. All other subsidiaries of GBC, whether direct or indirect, do not guarantee the Senior Secured Notes (collectively, the “Non-Guarantors”).

Holdings is also a guarantor of the ABL Facility and substantially all of its 100%-owned U.S. subsidiaries are borrowers under, or guarantors of, the ABL Facility on a senior secured basis.

The following condensed consolidating financial information presents the financial position, results of operations, comprehensive income and cash flows of (1) the Parent, (2) the Issuer, (3) the Guarantors, (4) the Non-Guarantors and (5) eliminations to arrive at the information for the Company on a consolidated basis. The condensed consolidating financial information presented below is not necessarily indicative of the financial position, results of operations, comprehensive income or cash flows of the Parent, the Issuer, the Guarantors or the Non-Guarantors on a stand-alone basis.

	Condensed Consolidating Balance Sheet
	As of June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current assets:
Cash	$	—		$	34,457		$	—	$	4,207	$	(4,654	)	$	34,010
Accounts receivable, net of allowance		—			4,815			182,082		16,443		—			203,340
Inventories		—			—			181,937		17,902		(290	)		199,549
Prepaid expenses and other current assets		—			10,030			14,925		195		(58	)		25,092
Deferred income taxes		—			31,760			—		—		—			31,760
Income tax receivable		—			2,147			—		—		—			2,147
Total current assets		—			83,209			378,944		38,747		(5,002	)		495,898
Property, plant and equipment, net		—			985			73,999		346		—			75,330
Investment in joint venture		—			—			2,168		—		—			2,168
Investment in subsidiaries		—			591,583			19,336		—		(610,919	)		—
Intercompany accounts		—			—			253,943		—		(253,943	)		—
Goodwill		—			—			4,399		—		—			4,399
Intangible assets, net		—			—			787		—		—			787
Deferred income taxes		—			6,826			—		—		—			6,826
Other noncurrent assets		—			15,878			916		—		—			16,794
Total assets	$	—		$	698,481		$	734,492	$	39,093	$	(869,864	)	$	602,202
Liabilities and (deficit) / equity
Current liabilities:
Accounts payable	$	—		$	290		$	108,410	$	3,283	$	(5,002	)	$	106,981
Accrued liabilities		—			17,494			34,455		736		—			52,685
Accrued interest		—			3,395			—		—		—			3,395
Income taxes payable		—			39			44		251		—			334
Total current liabilities		—			21,218			142,909		4,270		(5,002	)		163,395
Long-term debt		—			431,000			—		—		—			431,000
Other noncurrent liabilities		—			27,678			—		—		—			27,678
Obligations and advances in excess of investment in subsidiary		16,502			—			—		—		(16,502	)		—
Intercompany accounts		7,145			235,087			—		11,711		(253,943	)		—
Total liabilities		23,647			714,983			142,909		15,981		(275,447	)		622,073
Commitments and contingencies		—			—			—		—		—			—
Global Brass and Copper Holdings, Inc. stockholder’s (deficit) / equity		(23,647	)		(16,502	)		591,583		19,336		(594,417	)		(23,647	)
Noncontrolling interest		—			—			—		3,776		—			3,776
Total (deficit) / equity		(23,647	)		(16,502	)		591,583		23,112		(594,417	)		(19,871	)
Total liabilities and (deficit) / equity	$	—		$	698,481		$	734,492	$	39,093	$	(869,864	)	$	602,202

	Condensed Consolidating Balance Sheet
	As of December 31, 2012
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets
Current assets:
Cash	$	—		$	8,537		$	—	$	5,446	$	(121	)	$	13,862
Accounts receivable, net of allowance		—			4,630			144,533		15,154		—			164,317
Inventories		—			343			158,713		15,885		(563	)		174,378
Prepaid expenses and other current assets		—			9,229			2,600		312		—			12,141
Deferred income taxes		—			33,465			—		—		—			33,465
Income tax receivable, net		—			1,656			—		—		(356	)		1,300
Total current assets		—			57,860			305,846		36,797		(1,040	)		399,463
Property, plant and equipment, net		—			1,154			69,646		327		—			71,127
Investment in joint venture		—			—			2,972		—		—			2,972
Investment in subsidiaries		—			522,912			19,850		—		(542,762	)		—
Intercompany accounts		—			—			223,081		—		(223,081	)		—
Goodwill		—			—			4,399		—		—			4,399
Intangible assets, net		—			—			839		—		—			839
Deferred income taxes		—			6,138			—		—		—			6,138
Other noncurrent assets		—			17,115			640		—		—			17,755
Total assets	$	—		$	605,179		$	627,273	$	37,124	$	(766,883	)	$	502,693
Liabilities and (deficit) / equity
Current liabilities:
Accounts payable	$	—		$	1,398		$	77,390	$	2,910	$	(121	)	$	81,577
Accrued liabilities		—			20,592			26,971		861		—			48,424
Accrued interest		—			3,287			—		—		—			3,287
Income taxes payable		—			248			—		356		(356	)		248
Total current liabilities		—			25,525			104,361		4,127		(477	)		133,536
Long-term debt		—			389,522			—		—		—			389,522
Other noncurrent liabilities		—			27,436			—		—		—			27,436
Obligations and advances in excess of investment in subsidiary		42,522			—			—		—		(42,522	)		—
Intercompany accounts		8,829			205,218			—		9,597		(223,644	)		—
Total liabilities		51,351			647,701			104,361		13,724		(266,643	)		550,494
Commitments and contingencies		—			—			—		—		—			—
Global Brass and Copper Holdings, Inc. stockholder’s (deficit) / equity		(51,351	)		(42,522	)		522,912		19,850		(500,240	)		(51,351	)
Noncontrolling interest		—			—			—		3,550		—			3,550
Total (deficit) / equity		(51,351	)		(42,522	)		522,912		23,400		(500,240	)		(47,801	)
Total liabilities and (deficit) / equity	$	—		$	605,179		$	627,273	$	37,124	$	(766,883	)	$	502,693

	Condensed Consolidating Statement of Operations
	Three Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net sales	$	—		$	—		$	444,057		$	25,522	$	(8,101	)	$	461,478
Cost of sales		—			(415	)		394,201			24,093		(8,101	)		409,778
Gross profit		—			415			49,856			1,429		—			51,700
Selling, general and administrative expenses		4,802			24,512			22,840			701		—			52,855
Operating income (loss)		(4,802	)		(24,097	)		27,016			728		—			(1,155	)
Interest expense		—			9,959			—			—		—			9,959
Other (income) expense, net		—			97			(213	)		120		—			4
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(4,802	)		(34,153	)		27,229			608		—			(11,118	)
Provision for (benefit from) income taxes		(1,848	)		(4,553	)		12,446			416		—			6,461
Income (loss) before equity income (loss)		(2,954	)		(29,600	)		14,783			192		—			(17,579	)
Equity income (loss), net of tax		(14,178	)		15,422			639			—		(1,375	)		508
Net income (loss)		(17,132	)		(14,178	)		15,422			192		(1,375	)		(17,071	)
Less: Net income attributable to noncontrolling interest		—			—			—			61		—			61
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(17,132	)	$	(14,178	)	$	15,422		$	131	$	(1,375	)	$	(17,132	)

	Condensed Consolidating Statement of Operations
	Three Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net sales	$	—		$	—		$	397,588	$	24,807		$	(5,416	)	$	416,979
Cost of sales		—			654			352,200		22,420			(5,416	)		369,858
Gross profit (loss)		—			(654	)		45,388		2,387			—			47,121
Selling, general and administrative expenses		440			17,459			19,389		677			—			37,965
Operating income (loss)		(440	)		(18,113	)		25,999		1,710			—			9,156
Interest expense		—			10,209			—		—			—			10,209
Loss on extinguishment of debt		—			19,612			—		—			—			19,612
Other (income) expense, net		—			530			67		(199	)		—			398
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(440	)		(48,464	)		25,932		1,909			—			(21,063	)
Provision for (benefit from) income taxes		(169	)		(14,784	)		14,300		(318	)		—			(971	)
Income (loss) before equity income (loss)		(271	)		(33,680	)		11,632		2,227			—			(20,092	)
Equity income (loss), net of tax		(19,734	)		13,946			2,314		—			3,675			201
Net income (loss)		(20,005	)		(19,734	)		13,946		2,227			3,675			(19,891	)
Less: Net income attributable to noncontrolling interest		—			—			—		114			—			114
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(20,005	)	$	(19,734	)	$	13,946	$	2,113		$	3,675		$	(20,005	)

	Condensed Consolidating Statement of Operations
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net sales	$	—		$	—		$	872,130		$	48,498	$	(14,188	)	$	906,440
Cost of sales		—			116			777,054			44,842		(14,188	)		807,824
Gross profit		—			(116	)		95,076			3,656		—			98,616
Selling, general and administrative expenses		5,188			28,856			37,056			1,433		—			72,533
Operating income (loss)		(5,188	)		(28,972	)		58,020			2,223		—			26,083
Interest expense		—			19,834			—			—		—			19,834
Other (income) expense, net		—			187			(83	)		87		—			191
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(5,188	)		(48,993	)		58,103			2,136		—			6,058
Provision for (benefit from) income taxes		(1,997	)		(9,953	)		23,690			763		—			12,503
Income (loss) before equity income (loss)		(3,191	)		(39,040	)		34,413			1,373		—			(6,445	)
Equity income (loss), net of tax		(2,553	)		36,487			2,074			—		(35,148	)		860
Net income (loss)		(5,744	)		(2,553	)		36,487			1,373		(35,148	)		(5,585	)
Less: Net income attributable to noncontrolling interest		—			—			—			159		—			159
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(5,744	)	$	(2,553	)	$	36,487		$	1,214	$	(35,148	)	$	(5,744	)

	Condensed Consolidating Statement of Operations
	Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net sales	$	—		$	—		$	829,135		$	44,619		$	(13,384	)	$	860,370
Cost of sales		—			(1,905	)		738,120			40,464			(13,384	)		763,295
Gross profit		—			1,905			91,015			4,155			—			97,075
Selling, general and administrative expenses		735			21,812			32,044			1,297			—			55,888
Operating income (loss)		(735	)		(19,907	)		58,971			2,858			—			41,187
Interest expense (income)		—			19,961			(3	)		—			—			19,958
Loss on extinguishment of debt		—			19,612			—			—			—			19,612
Other (income) expense, net		—			597			251			(139	)		—			709
Income (loss) before provision for (benefit from) income taxes and equity income (loss)		(735	)		(60,077	)		58,723			2,997			—			908
Provision for (benefit from) income taxes		(283	)		(19,161	)		26,662			9			—			7,227
Income (loss) before equity income (loss)		(452	)		(40,916	)		32,061			2,988			—			(6,319	)
Equity income (loss), net of tax		(5,560	)		35,356			3,295			—			(32,616	)		475
Net income (loss)		(6,012	)		(5,560	)		35,356			2,988			(32,616	)		(5,844	)
Less: Net income attributable to noncontrolling interest		—			—			—			168			—			168
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,012	)	$	(5,560	)	$	35,356		$	2,820		$	(32,616	)	$	(6,012	)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Three Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net income (loss)	$	(17,132	)	$	(14,178	)	$	15,422		$	192		$	(1,375	)	$	(17,071	)
Foreign currency translation adjustment, net of tax		(489	)		(489	)		(803	)		(177	)		1,518			(440	)
Comprehensive income (loss)		(17,621	)		(14,667	)		14,619			15			143			(17,511	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			110			—			110
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(17,621	)	$	(14,667	)	$	14,619		$	(95	)	$	143		$	(17,621	)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Three Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations		Consolidated
Net income (loss)	$	(20,005	)	$	(19,734	)	$	13,946		$	2,227		$	3,675	$	(19,891	)
Foreign currency translation adjustment, net of tax		(148	)		(148	)		(227	)		(520	)		900		(143	)
Comprehensive income (loss)		(20,153	)		(19,882	)		13,719			1,707			4,575		(20,034	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			119			—		119
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(20,153	)	$	(19,882	)	$	13,719		$	1,588		$	4,575	$	(20,153	)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	(5,744	)	$	(2,553	)	$	36,487		$	1,373	$	(35,148	)	$	(5,585	)
Foreign currency translation adjustment, net of tax		(879	)		(879	)		(1,462	)		209		2,199			(812	)
Comprehensive income (loss)		(6,623	)		(3,432	)		35,025			1,582		(32,949	)		(6,397	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			226		—			226
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,623	)	$	(3,432	)	$	35,025		$	1,356	$	(32,949	)	$	(6,623	)

	Condensed Consolidating Statement of Comprehensive Income (Loss)
	Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Net income (loss)	$	(6,012	)	$	(5,560	)	$	35,356		$	2,988	$	(32,616	)	$	(5,844	)
Foreign currency translation adjustment, net of tax		(145	)		(145	)		(222	)		799		(410	)		(123	)
Comprehensive income (loss)		(6,157	)		(5,705	)		35,134			3,787		(33,026	)		(5,967	)
Less: Comprehensive income attributable to noncontrolling interest		—			—			—			190		—			190
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$	(6,157	)	$	(5,705	)	$	35,134		$	3,597	$	(33,026	)	$	(6,157	)

	Condensed Consolidating Statement of Cash Flows
	Six Months Ended June 30, 2013
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities
Net cash provided by (used in) operating activities	$	—		$	(15,558	)	$	8,103		$	935		$	(11,408	)	$	(17,928	)
Cash flows from investing activities
Capital expenditures		—			—			(8,268	)		(37	)		—			(8,305	)
Payable to subsidiaries		(4,875	)		—			—			—			4,875			—
Proceeds from sale of property, plant and equipment		—			—			165			4			—			169
Net cash provided by (used in) investing activities		(4,875	)		—			(8,103	)		(33	)		4,875			(8,136	)
Cash flows from financing activities
Borrowings on ABL Facility		—			229,787			—			—			—			229,787
Payments on ABL Facility		—			(188,309	)		—			—			—			(188,309	)
Distribution to stockholder		—			—			—			(2,000	)		2,000			—
Net payments (amounts due) from stockholder		4,875			—			—			—			—			4,875
Net cash provided by (used in) financing activities		4,875			41,478			—			(2,000	)		2,000			46,353
Effect of foreign currency exchange rate changes		—			—			—			(141	)		—			(141	)
Net increase (decrease) in cash		—			25,920			—			(1,239	)		(4,533	)		20,148
Cash at beginning of period		—			8,537			—			5,446			(121	)		13,862
Cash at end of period	$	—		$	34,457		$	—		$	4,207		$	(4,654	)	$	34,010

	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2012
	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Cash flows from operating activities
Net cash provided by (used for) operating activities	$	73,624		$	25,672		$	6,649		$	(999	)	$	(74,609	)	$	30,337
Cash flows from investing activities
Capital expenditures		—			(549	)		(6,655	)		(18	)		—			(7,222	)
Capital distributions from subsidiary		86,376			—			—						(86,376	)		—
Payable to subsidiaries		2,161			—			—			—			(2,161	)		—
Proceeds from sale of property, plant and equipment		—			—			6			—			—			6
Net cash provided by (used in) investing activities		88,537			(549	)		(6,649	)		(18	)		(88,537	)		(7,216	)
Cash flows from financing activities
Deferred financing fees		—			(12,926	)		—			—			—			(12,926	)
Proceeds from senior secured notes		—			375,000			—			—			—			375,000
Payments on term loan		—			(310,875	)		—			—			—			(310,875	)
Borrowings on ABL Facility		—			81,586			—			—			—			81,586
Payments on ABL Facility		—			(30,913	)		—			—			—			(30,913	)
Distribution to stockholder		(160,000	)		(160,000	)		—			—			160,000			(160,000	)
Amounts due from stockholder		(2,161	)		—			—			—			—			(2,161	)
Net cash used in financing activities		(162,161	)		(58,128	)		—			—			160,000			(60,289	)
Effect of foreign currency exchange rate changes		—			—			—			(207	)		—			(207	)
Net decrease in cash		—			(33,005	)		—			(1,224	)		(3,146	)		(37,375	)
Cash at beginning of period		—			45,302			—			4,648			(413	)		49,537
Cash at end of period	$	—		$	12,297		$	—		$	3,424		$	(3,559	)	$	12,162

XML

Prepaid Expenses and Other Current Assets - Components of Prepaid Expenses and Other Current Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Collateral on deposit-commodity derivative contracts	$ 267	$ 767
Commodity derivative contracts	458	548
Deferred expense	12,003
Loss fund payments-workers' compensation	6,883	6,968
Prepaid insurance	2,131	1,261
Prepaid tooling	1,604	764
Other	1,746	1,833
Total prepaid expenses and other current assets	$ 25,092	$ 12,141

XML

Derivative Contracts (Tables)

6 Months Ended

Jun. 30, 2013

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Effects of Derivative Contracts in Condensed Consolidated Financial Statements

The following tables summarize the gross amounts of recognized derivative assets and liabilities, the net amounts presented in the consolidated balance sheet, and the net amounts after deducting collateral that has been deposited with counterparties:

	As of June 30, 2013
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Assets		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Assets Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amount
Open metal contracts	$	1,953	$	(1,574	)	$	379	$	—	$	—	$	379
(334 contracts)
Open electricity contracts		79		—			79		—		—		79
(6 contracts)
Interest rate cap agreements		—		—			—		—		—		—
(2 contracts)
Total	$	2,032	$	(1,574	)	$	458	$	—	$	—	$	458
Consolidated balance sheet location:
Prepaid expenses and other current assets			$	458
Total			$	458
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Liabilities Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Deposited		Net Amount
Open metal contracts	$	1,574	$	(1,574	)	$	—	$	—	$	—	$	—
(218 contracts)
Total	$	1,574	$	(1,574	)	$	—	$	—	$	—	$	—

	As of December 31, 2012
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Assets		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Assets Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Received		Net Amount
Open metals contracts	$	603	$	(224	)	$	379	$	—	$	—	$	379
(208 contracts)
Open natural gas contracts		2		—			2		—		—		2
(6 contracts)
Open electricity contracts		169		(2	)		167		—		—		167
(17 contracts)
Interest rate cap agreements		1		—			1		—		—		1
(2 contracts)
Total	$	775	$	(226	)	$	549	$	—	$	—	$	549
Consolidated balance sheet location:
Prepaid expenses and other current assets			$	548
Other noncurrent assets				1
Total			$	549
								Amounts Not Offset in the Consolidated Balance Sheet
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in Consolidated Balance Sheet			Net Amounts of Liabilities Presented in Consolidated Balance Sheet		Financial Instruments		Cash Collateral Deposited		Net Amount
Open metals contracts	$	224	$	(224	)	$	—	$	—	$	—	$	—
(85 contracts)
Open electricity contracts		2		(2	)		—		—		—		—
(1 contract)
Total	$	226	$	(226	)	$	—	$	—	$	—	$	—

The following table summarizes the effects of derivative contracts in the consolidated statements of operations:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Cost of sales
Realized and unrealized gain (loss)—metal contracts	$	634		$	(606	)	$	651		$	504
Realized and unrealized gain (loss)—natural gas contracts		—			34			(2	)		69
Realized and unrealized (loss) gain—electricity contracts		(165	)		147			(85	)		(35	)
Total	$	469		$	(425	)	$	564		$	538
Interest expense
Unrealized loss—interest rate cap agreements	$	—		$	(12	)	$	(1	)	$	(146	)

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Basis of Presentation and Principles of Consolidation - Summary of Revisions to Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Accounts receivable, net of allowance	$ 203,340	$ 164,317
Inventories	199,549	174,378
Deferred income tax assets-current	31,760	33,465
Income tax receivable	2,147	1,300
Total current assets	495,898	399,463
Deferred income tax assets-noncurrent	6,826	6,138
Total assets	602,202	502,693
Accounts payable	106,981	81,577
Accrued liabilities	52,685	48,424
Total current liabilities	163,395	133,536
Total liabilities	622,073	550,494
Accumulated deficit	(53,897)	(48,153)
Total Global Brass and Copper Holdings, Inc. stockholders' deficit	(23,647)	(51,351)
Total deficit	(19,871)	(47,801)	(65,951)	82,660
Total liabilities and deficit	602,202	502,693
Scenario, Previously Reported [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Accounts receivable, net of allowance			192,326
Inventories			180,815
Deferred income tax assets-current			28,079
Income tax receivable			4,996
Total current assets			429,443
Deferred income tax assets-noncurrent			19,917
Total assets			538,522
Accounts payable			105,981
Accrued liabilities			39,590
Total current liabilities			148,919
Total liabilities			605,586
Accumulated deficit			(67,799)
Total Global Brass and Copper Holdings, Inc. stockholders' deficit			(70,422)
Total deficit			(67,064)
Total liabilities and deficit			538,522
Scenario, Adjustment [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Accounts receivable, net of allowance			984
Inventories			(811)
Deferred income tax assets-current			1,264
Income tax receivable			(476)
Total current assets			961
Deferred income tax assets-noncurrent			(260)
Total assets			701
Accounts payable			(1,396)
Accrued liabilities			984
Total current liabilities			(412)
Total liabilities			(412)
Accumulated deficit			1,113
Total Global Brass and Copper Holdings, Inc. stockholders' deficit			1,113
Total deficit			1,113
Total liabilities and deficit			701
Scenario Revised [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Accounts receivable, net of allowance			193,310
Inventories			180,004
Deferred income tax assets-current			29,343
Income tax receivable			4,520
Total current assets			430,404
Deferred income tax assets-noncurrent			19,657
Total assets			539,223
Accounts payable			104,585
Accrued liabilities			40,574
Total current liabilities			148,507
Total liabilities			605,174
Accumulated deficit			(66,686)
Total Global Brass and Copper Holdings, Inc. stockholders' deficit			(69,309)
Total deficit			(65,951)
Total liabilities and deficit			$ 539,223

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Other Noncurrent Assets - Schedule of Other Noncurrent Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Deferred financing fees, net	$ 15,852	$ 17,082
Utility and other deposits	942	668
Interest rate cap agreements		1
Other		4
Total other noncurrent assets	$ 16,794	$ 17,755

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Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2013

Payables And Accruals [Abstract]

Components of Accrued Liabilities

Accrued liabilities consisted of the following:

	As of
	June 30,		December 31,
	2013		2012
Personnel expense	$	15,727	$	20,872
Workers’ compensation		15,281		15,754
Deferred revenue		11,952		—
Professional fees		870		2,145
Insurance		2,150		2,253
Utilities		1,607		1,844
Taxes		1,097		1,745
Tooling		712		686
Other		3,289		3,125
Total accrued liabilities	$	52,685	$	48,424

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Segment Information - Reconciliation of Segment Adjusted EBITDA to Income Before Provision for Income Taxes and Equity Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Information [Line Items]
Net sales	$ 461,478	$ 416,979	$ 906,440	$ 860,370
Total segment adjusted EBITDA	39,490	35,521	74,371	71,370
Corporate and Other	(8,500)	(5,550)	(14,327)	(9,429)
Loss on extinguishment of debt		(19,612)		(19,612)
Depreciation and amortization	(2,072)	(1,681)	(3,981)	(3,205)
Interest expense	(9,959)	(10,209)	(19,834)	(19,958)
Equity method investment income	(327)	(20)	(498)	(113)
Net income attributable to noncontrolling interest	61	114	159	168
Lower of cost or market adjustment to inventory	(318)		(318)
(Loss) gain on derivative contracts	(41)	(109)	(62)	1,204
Share-based compensation expense	(181)		(181)
Compensation expense-profits interest awards	(29,271)	(19,517)	(29,271)	(19,517)
(Loss) income before provision for (benefit from) income taxes and equity income	(11,118)	(21,063)	6,058	908
Olin Brass [Member]
Segment Information [Line Items]
Net sales	216,500	165,803	403,065	332,090
Total segment adjusted EBITDA	16,233	13,062	27,683	23,751
Chase [Member]
Segment Information [Line Items]
Net sales	164,697	165,922	339,179	354,609
Total segment adjusted EBITDA	18,954	17,251	37,835	37,191
Oster [Member]
Segment Information [Line Items]
Net sales	80,281	85,254	164,196	173,671
Total segment adjusted EBITDA	4,303	5,208	8,853	10,428
Intersegment Eliminations [Member]
Segment Information [Line Items]
Net sales	14,259	12,929	28,663	25,431
Intersegment Eliminations [Member] | Olin Brass [Member]
Segment Information [Line Items]
Net sales	14,210	12,754	28,548	25,107
Intersegment Eliminations [Member] | Chase [Member]
Segment Information [Line Items]
Net sales	7	156	7	302
Intersegment Eliminations [Member] | Oster [Member]
Segment Information [Line Items]
Net sales	$ 42	$ 19	$ 108	$ 22

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Condensed Consolidating Financial Information - Consolidating Statement of Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ (17,071)	$ (19,891)	$ (5,585)	$ (5,844)
Foreign currency translation adjustment, net of tax	(440)	(143)	(812)	(123)
Comprehensive income (loss)	(17,511)	(20,034)	(6,397)	(5,967)
Less: Comprehensive income attributable to noncontrolling interest	110	119	226	190
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	(17,621)	(20,153)	(6,623)	(6,157)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(17,132)	(20,005)	(5,744)	(6,012)
Foreign currency translation adjustment, net of tax	(489)	(148)	(879)	(145)
Comprehensive income (loss)	(17,621)	(20,153)	(6,623)	(6,157)
Less: Comprehensive income attributable to noncontrolling interest
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	(17,621)	(20,153)	(6,623)	(6,157)
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(14,178)	(19,734)	(2,553)	(5,560)
Foreign currency translation adjustment, net of tax	(489)	(148)	(879)	(145)
Comprehensive income (loss)	(14,667)	(19,882)	(3,432)	(5,705)
Less: Comprehensive income attributable to noncontrolling interest
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	(14,667)	(19,882)	(3,432)	(5,705)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	15,422	13,946	36,487	35,356
Foreign currency translation adjustment, net of tax	(803)	(227)	(1,462)	(222)
Comprehensive income (loss)	14,619	13,719	35,025	35,134
Less: Comprehensive income attributable to noncontrolling interest
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	14,619	13,719	35,025	35,134
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	192	2,227	1,373	2,988
Foreign currency translation adjustment, net of tax	(177)	(520)	209	799
Comprehensive income (loss)	15	1,707	1,582	3,787
Less: Comprehensive income attributable to noncontrolling interest	110	119	226	190
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	(95)	1,588	1,356	3,597
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	(1,375)	3,675	(35,148)	(32,616)
Foreign currency translation adjustment, net of tax	1,518	900	2,199	(410)
Comprehensive income (loss)	143	4,575	(32,949)	(33,026)
Less: Comprehensive income attributable to noncontrolling interest
Comprehensive income (loss) attributable to Global Brass and Copper Holdings, Inc.	$ 143	$ 4,575	$ (32,949)	$ (33,026)

XML

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013 Segment
Segment Reporting [Abstract]
Number of reportable segments	3

XML

Basis of Presentation and Principles of Consolidation - Summary of Revisions to Consolidated Statement of Changes in Equity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss	$ (17,071)	$ (19,891)	$ (5,585)	$ (5,844)
Net loss attributable to Global Brass and Copper Holdings, Inc.	(17,132)	(20,005)	(5,744)	(6,012)
Accumulated deficit-Balance, June 30, 2012	(53,897)		(53,897)		(48,153)
Total Global Brass and Copper Holdings, Inc. stockholders' deficit-Balance, June 30, 2012	(23,647)		(23,647)		(51,351)
Total deficit-Balance, June 30, 2012	(19,871)	(65,951)	(19,871)	(65,951)	(47,801)	82,660
Scenario, Previously Reported [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss		(20,970)		(6,457)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(21,084)		(6,625)
Accumulated deficit-Balance, June 30, 2012		(67,799)		(67,799)
Total Global Brass and Copper Holdings, Inc. stockholders' deficit-Balance, June 30, 2012		(70,422)		(70,422)
Total deficit-Balance, June 30, 2012		(67,064)		(67,064)
Scenario, Adjustment [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss		1,079		613
Net loss attributable to Global Brass and Copper Holdings, Inc.		1,079		613
Accumulated deficit-Balance, June 30, 2012		1,113		1,113
Total Global Brass and Copper Holdings, Inc. stockholders' deficit-Balance, June 30, 2012		1,113		1,113
Total deficit-Balance, June 30, 2012		1,113		1,113
Scenario Revised [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss		(19,891)		(5,844)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(20,005)		(6,012)
Accumulated deficit-Balance, June 30, 2012		(66,686)		(66,686)
Total Global Brass and Copper Holdings, Inc. stockholders' deficit-Balance, June 30, 2012		(69,309)		(69,309)
Total deficit-Balance, June 30, 2012		$ (65,951)		$ (65,951)

XML

Condensed Consolidating Financial Information - Additional Information (Detail)	Jun. 30, 2013 ABL Facility [Member]	Jun. 30, 2012 Senior Secured Notes [Member]
Condensed Consolidating Financial Information [Line Items]
Ownership percentage of equity holdings	100.00%	100.00%

XML

Stock Split

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Stock Split

17. Stock Split

On April 10, 2013 the Company’s Board of Directors authorized a 211,100-to-1 stock split to be effected after the effective date of the Company’s Form S-1 Registration Statement and prior to the completion of the Company’s initial public offering. On May 29, 2013 the Company completed its initial public offering of 8,050,000 shares of its common stock at a price of $11.00 per share. The share numbers and per share amounts disclosed in the consolidated financial statements and notes to consolidated financial statements have been retroactively adjusted to give effect to the stock split.

The balance sheets have been retroactively adjusted for the impact of the stock split by an increase to common stock of $211 with an offsetting charge to accumulated deficit.

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Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (17,071)	$ (19,891)	$ (5,585)	$ (5,844)
Other comprehensive loss :
Foreign currency translation adjustment	(753)	(221)	(1,395)	(198)
Less: Income tax benefit on other comprehensive loss	(313)	(78)	(583)	(75)
Comprehensive income (loss)	(17,511)	(20,034)	(6,397)	(5,967)
Less: Comprehensive income attributable to noncontrolling interest	110	119	226	190
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.	$ (17,621)	$ (20,153)	$ (6,623)	$ (6,157)

XML

Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities
Net loss	$ (5,585)	$ (5,844)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Lower of cost or market adjustment to inventory	318
Mark to market on commodity contracts	62	(1,204)
Mark to market on interest rate cap agreements	1	146
Depreciation	3,929	3,145
Amortization of intangible assets	52	60
Amortization of debt discount and issuance costs	1,230	3,368
Loss on extinguishment of debt		19,612
Profits interest compensation expense	29,271	19,517
Share-based compensation expense	181
Provision for bad debts, net of reductions	(104)	172
Deferred income taxes	1,528	(575)
Loss on sale of property, plant and equipment	9	3
Equity income, net of tax	(860)	(475)
Distributions from equity method investment		500
Change in assets and liabilities:
Accounts receivable	(38,726)	(31,680)
Inventories	(25,421)	6,065
Prepaid expenses and other current assets	(13,038)	5,395
Accounts payable	25,569	26,688
Accrued liabilities	4,274	(7,016)
Accrued interest	108	(721)
Income taxes, net	(768)	225
Other, net	42	(7,044)
Net cash (used in) provided by operating activities	(17,928)	30,337
Cash flows from investing activities
Capital expenditures	(8,305)	(7,222)
Proceeds from sale of property, plant and equipment	169	6
Net cash used in investing activities	(8,136)	(7,216)
Cash flows from financing activities
Deferred financing fees		(12,926)
Proceeds from senior secured notes		375,000
Payments on term loan		(310,875)
Borrowings on ABL Facility	229,787	81,586
Payments on ABL Facility	(188,309)	(30,913)
Distribution to stockholder		(160,000)
Net payment (amounts due) from stockholder	4,875	(2,161)
Net cash provided by (used in) financing activities	46,353	(60,289)
Effect of foreign currency exchange rates	(141)	(207)
Net increase (decrease) in cash	20,148	(37,375)
Cash at beginning of period	13,862	49,537
Cash at end of period	$ 34,010	$ 12,162

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Prepaid Expenses and Other Current Assets

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Prepaid Expenses and Other Current Assets

3. Prepaid Expenses and Other Current Assets

The Company’s prepaid expenses and other current assets are as follows:

	As of
	June 30, 2013		December 31, 2012
Collateral on deposit—commodity derivative contracts	$	267	$	767
Commodity derivative contracts		458		548
Deferred expense		12,003		—
Loss fund payments—workers’ compensation		6,883		6,968
Prepaid insurance		2,131		1,261
Prepaid tooling		1,604		764
Other		1,746		1,833
Total prepaid expenses and other current assets	$	25,092	$	12,141

XML

Condensed Consolidating Financial Information - Consolidating Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities
Net cash provided by (used for) operating activities	$ (17,928)	$ 30,337
Cash flows from investing activities
Capital expenditures	(8,305)	(7,222)
Capital distributions from subsidiary
Payable to subsidiaries
Proceeds from sale of property, plant and equipment	169	6
Net cash provided by (used in) investing activities	(8,136)	(7,216)
Cash flows from financing activities
Deferred financing fees		(12,926)
Proceeds from senior secured notes		375,000
Payments on term loan		(310,875)
Borrowings on ABL Facility	229,787	81,586
Payments on ABL Facility	(188,309)	(30,913)
Distribution to stockholder		(160,000)
Amounts due from stockholder	4,875	(2,161)
Net cash provided by (used in) financing activities	46,353	(60,289)
Effect of foreign currency exchange rate changes	(141)	(207)
Net increase (decrease) in cash	20,148	(37,375)
Cash at beginning of period	13,862	49,537
Cash at end of period	34,010	12,162
Parent [Member]
Cash flows from operating activities
Net cash provided by (used for) operating activities		73,624
Cash flows from investing activities
Capital expenditures
Capital distributions from subsidiary		86,376
Payable to subsidiaries	(4,875)	2,161
Proceeds from sale of property, plant and equipment
Net cash provided by (used in) investing activities	(4,875)	88,537
Cash flows from financing activities
Borrowings on ABL Facility
Payments on ABL Facility
Distribution to stockholder		(160,000)
Amounts due from stockholder	4,875	(2,161)
Net cash provided by (used in) financing activities	4,875	(162,161)
Effect of foreign currency exchange rate changes
Net increase (decrease) in cash
Cash at beginning of period
Cash at end of period
Issuer [Member]
Cash flows from operating activities
Net cash provided by (used for) operating activities	(15,558)	25,672
Cash flows from investing activities
Capital expenditures		(549)
Capital distributions from subsidiary
Payable to subsidiaries
Proceeds from sale of property, plant and equipment
Net cash provided by (used in) investing activities		(549)
Cash flows from financing activities
Deferred financing fees		(12,926)
Proceeds from senior secured notes		375,000
Payments on term loan		(310,875)
Borrowings on ABL Facility	229,787	81,586
Payments on ABL Facility	(188,309)	(30,913)
Distribution to stockholder		(160,000)
Amounts due from stockholder
Net cash provided by (used in) financing activities	41,478	(58,128)
Effect of foreign currency exchange rate changes
Net increase (decrease) in cash	25,920	(33,005)
Cash at beginning of period	8,537	45,302
Cash at end of period	34,457	12,297
Guarantor Subsidiaries [Member]
Cash flows from operating activities
Net cash provided by (used for) operating activities	8,103	6,649
Cash flows from investing activities
Capital expenditures	(8,268)	(6,655)
Capital distributions from subsidiary
Payable to subsidiaries
Proceeds from sale of property, plant and equipment	165	6
Net cash provided by (used in) investing activities	(8,103)	(6,649)
Cash flows from financing activities
Borrowings on ABL Facility
Payments on ABL Facility
Distribution to stockholder
Amounts due from stockholder
Net cash provided by (used in) financing activities
Effect of foreign currency exchange rate changes
Net increase (decrease) in cash
Cash at beginning of period
Cash at end of period
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities
Net cash provided by (used for) operating activities	935	(999)
Cash flows from investing activities
Capital expenditures	(37)	(18)
Capital distributions from subsidiary
Payable to subsidiaries
Proceeds from sale of property, plant and equipment	4
Net cash provided by (used in) investing activities	(33)	(18)
Cash flows from financing activities
Borrowings on ABL Facility
Payments on ABL Facility
Distribution to stockholder	(2,000)
Amounts due from stockholder
Net cash provided by (used in) financing activities	(2,000)
Effect of foreign currency exchange rate changes	(141)	(207)
Net increase (decrease) in cash	(1,239)	(1,224)
Cash at beginning of period	5,446	4,648
Cash at end of period	4,207	3,424
Eliminations [Member]
Cash flows from operating activities
Net cash provided by (used for) operating activities	(11,408)	(74,609)
Cash flows from investing activities
Capital expenditures
Capital distributions from subsidiary		(86,376)
Payable to subsidiaries	4,875	(2,161)
Net cash provided by (used in) investing activities	4,875	(88,537)
Cash flows from financing activities
Borrowings on ABL Facility
Payments on ABL Facility
Distribution to stockholder	2,000	160,000
Amounts due from stockholder
Net cash provided by (used in) financing activities	2,000	160,000
Effect of foreign currency exchange rate changes
Net increase (decrease) in cash	(4,533)	(3,146)
Cash at beginning of period	(121)	(413)
Cash at end of period	$ (4,654)	$ (3,559)

XML

Basis of Presentation and Principles of Consolidation

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Basis of Presentation and Principles of Consolidation

1. Basis of Presentation and Principles of Consolidation

Global Brass and Copper Holdings, Inc. (“Holdings” or the “Company”) was incorporated in Delaware, on October 10, 2007. Holdings, through its wholly-owned principal operating subsidiary, Global Brass and Copper, Inc. (“GBC”), commenced commercial operations on November 19, 2007 through the acquisition of the metals business from Olin Corporation. GBC is a leading, value-added converter, fabricator, distributor and processor of specialized copper and brass products in North America. On May 29, 2013, the Company completed its initial public offering of 8,050,000 shares of its common stock (the “initial public offering” or “IPO”). The shares began trading on the New York Stock Exchange on May 23, 2013 under the ticker symbol “BRSS”. Halkos Holdings, LLC (“Halkos”), the sole stockholder of the Company prior to the IPO, sold all of the shares in the initial public offering and received all of the net proceeds from the offering. After giving effect to the IPO, Halkos beneficially owns approximately 61.5% of the outstanding common stock of the Company. KPS Capital Partners, L.P. and its affiliates (“KPS”) are the majority shareholders of Halkos.

The Company is operated and managed through three distinct divisions which are also the Company’s reportable segments: Olin Brass, Chase Brass (“Chase”) and A.J. Oster (“Oster”).

These consolidated financial statements include the accounts of the Company, its wholly-owned subsidiaries and its majority-owned subsidiaries in which the Company has a controlling interest. All significant intercompany accounts and transactions relative to wholly- and majority-owned subsidiaries have been eliminated. The equity method is used to account for investments in affiliated companies, 20% to 50% owned where the Company does not hold a controlling voting interest and does not direct the matters that most significantly impact the investee’s operations.

The accompanying unaudited interim financial statements include all normal recurring adjustments which are, in the opinion of management, necessary to a fair statement of the results for the interim periods presented. The December 31, 2012 consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. In addition, it requires management to make estimates and assumptions that affect the reported amount of net sales and expenses during the reporting period. Actual amounts could differ from those estimates.

Results of operations for the interim periods presented are not necessarily indicative of results which may be expected for any other interim period or for the year as a whole. There have been no significant changes to the Company’s significant accounting policies during the six months ended June 30, 2013. These interim financial statements should be read in conjunction with the December 31, 2012 consolidated financial statements of the Company, which were included in our Amendment No. 9 to Form S-1 Registration Statement filed with the Securities and Exchange Commission on May 22, 2013.

Revision of Prior Period Financial Statements

During 2012, the Company identified immaterial errors in previously issued consolidated financial statements related to the three and six months ended June 30, 2012, which were corrected in the period identified, including:

1. An error in the accounting for raw material in-transit was identified in the third quarter of 2012. Inventory was overstated by $811 as of June 30, 2012. Cost of sales was overstated by $50 and understated by $388 for the three and six months ended June 30, 2012, respectively.

2. Duplicate accruals for the receipt of raw material were identified in the third quarter of 2012. Accounts payable was overstated by $1,396 as of June 30, 2012. Cost of sales was overstated by $1,007 for the three and six months ended June 30, 2012.

3. An error in the accounting for workers’ compensation insurance related to the first quarter of 2012 was identified and originally corrected in the second quarter of fiscal 2012. Cost of sales was overstated by $298 for the three months ended June 30, 2012.

4. An error in the accounting for insurance receivables for workers’ compensation was identified and originally corrected in the fourth quarter of 2012. Accounts receivable and accrued liabilities were understated by $984.

The Company assessed the materiality of all errors, individually and in the aggregate, on previously issued consolidated financial statements and concluded that the errors were not material to any of the Company’s previously issued financial statements.

A summary of the revisions to the consolidated financial statements as of June 30, 2012 and for the three and six months ended June 30, 2012 is as follows:

	As Previously Reported			Adjustment			As Revised
	June 30, 2012
Consolidated Balance Sheet
Accounts receivable, net of allowance	$	192,326		$	984		$	193,310
Inventories		180,815			(811	)		180,004
Deferred income tax assets—current		28,079			1,264			29,343
Income tax receivable		4,996			(476	)		4,520
Total current assets		429,443			961			430,404
Deferred income tax assets—noncurrent		19,917			(260	)		19,657
Total assets		538,522			701			539,223
Accounts payable		105,981			(1,396	)		104,585
Accrued liabilities		39,590			984			40,574
Total current liabilities		148,919			(412	)		148,507
Total liabilities		605,586			(412	)		605,174
Accumulated deficit		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit		(70,422	)		1,113			(69,309	)
Total deficit		(67,064	)		1,113			(65,951	)
Total liabilities and deficit		538,522			701			539,223
	Three Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	371,213		$	(1,355	)	$	369,858
Gross profit		45,766			1,355			47,121
Operating income		7,801			1,355			9,156
Loss before benefit from income taxes and equity income		(22,418	)		1,355			(21,063	)
Benefit from income taxes		(1,247	)		276			(971	)
Loss before equity income		(21,171	)		1,079			(20,092	)
Net loss		(20,970	)		1,079			(19,891	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(21,084	)		1,079			(20,005	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(1.00	)	$	0.05		$	(0.95	)

	As Previously Reported			Adjustment			As Revised
	Six Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	763,914		$	(619	)	$	763,295
Gross profit		96,456			619			97,075
Operating income		40,568			619			41,187
Income before provision for income taxes and equity income		289			619			908
Provision for income taxes		7,221			6			7,227
Loss before equity income		(6,932	)		613			(6,319	)
Net loss		(6,457	)		613			(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.31	)	$	0.03		$	(0.28	)
	Three Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(20,970	)	$	1,079		$	(19,891	)
Comprehensive loss		(21,113	)		1,079			(20,034	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(21,232	)		1,079			(20,153	)
	Six Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(6,457	)	$	613		$	(5,844	)
Comprehensive loss		(6,580	)		613			(5,967	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(6,770	)		613			(6,157	)
	Six Months Ended June 30, 2012
Consolidated Statement of Changes in Deficit
Net loss	$	(6,457	)	$	613		$	(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Accumulated deficit—Balance, June 30, 2012		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit—Balance, June 30, 2012		(70,422	)		1,113			(69,309	)
Total deficit—Balance, June 30, 2012		(67,064	)		1,113			(65,951	)

Recently Issued and Recently Adopted Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This guidance requires entities to provide disclosures about items that are required by U.S. GAAP to be reclassified from accumulated other comprehensive income (“AOCI”) to net income in their entirety in the same reporting period. The disclosure includes the amount of the reclassification and identifies the line item on the statement where net income is presented that is affected by the reclassification. For other items reclassified from AOCI, the disclosure cross-references to other disclosures where additional details about their effects are disclosed. This guidance is effective for reporting periods beginning after December 15, 2012. The adoption of this guidance in the first quarter of 2013 did not have a material effect on the Company’s consolidated financial statements and disclosures.

In December 2011, the FASB issued ASU 2011-11, Disclosures about Offsetting Assets and Liabilities. This guidance requires entities to disclose both gross and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. This guidance does not amend existing guidance on when it is appropriate to offset. In January 2013, the FASB issued ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which limits the scope of ASU 2011-11 to derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and lending arrangements. The guidance is effective for annual periods beginning January 1, 2013 and interim periods within those annual periods. The Company adopted this guidance in the first quarter of 2013 and has included the required disclosures in note 10, “Derivative Contracts”.

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Basis of Presentation and Principles of Consolidation - Summary of Revisions to Consolidated Statement of Operation (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cost of sales	$ 409,778	$ 369,858	$ 807,824	$ 763,295
Gross profit	51,700	47,121	98,616	97,075
Operating income	(1,155)	9,156	26,083	41,187
Income before provision for income taxes and equity income	(11,118)	(21,063)	6,058	908
Benefit from income taxes	6,461	(971)	12,503	7,227
Loss before equity income	(17,579)	(20,092)	(6,445)	(6,319)
Net loss	(17,071)	(19,891)	(5,585)	(5,844)
Net loss attributable to Global Brass and Copper Holdings, Inc.	(17,132)	(20,005)	(5,744)	(6,012)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$ (0.81)	$ (0.95)	$ (0.27)	$ (0.28)
Scenario, Previously Reported [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cost of sales		371,213		763,914
Gross profit		45,766		96,456
Operating income		7,801		40,568
Income before provision for income taxes and equity income		(22,418)		289
Benefit from income taxes		(1,247)		7,221
Loss before equity income		(21,171)		(6,932)
Net loss		(20,970)		(6,457)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(21,084)		(6,625)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic		$ (1.00)		$ (0.31)
Scenario, Adjustment [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cost of sales		(1,355)		(619)
Gross profit		1,355		619
Operating income		1,355		619
Income before provision for income taxes and equity income		1,355		619
Benefit from income taxes		276		6
Loss before equity income		1,079		613
Net loss		1,079		613
Net loss attributable to Global Brass and Copper Holdings, Inc.		1,079		613
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic		$ 0.05		$ 0.03
Scenario Revised [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cost of sales		369,858		763,295
Gross profit		47,121		97,075
Operating income		9,156		41,187
Income before provision for income taxes and equity income		(21,063)		908
Benefit from income taxes		(971)		7,227
Loss before equity income		(20,092)		(6,319)
Net loss		(19,891)		(5,844)
Net loss attributable to Global Brass and Copper Holdings, Inc.		$ (20,005)		$ (6,012)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic		$ (0.95)		$ (0.28)

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Inventories (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Summary of Inventories

The Company’s inventories are as follows:

	As of
	June 30, 2013		December 31, 2012
Raw materials and supplies	$	37,111	$	37,766
Work-in-process		83,811		69,286
Finished goods		78,627		67,326
Total inventories	$	199,549	$	174,378

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Financing (Tables)

6 Months Ended

Jun. 30, 2013

Debt Disclosure [Abstract]

Components of Long-Term Debt

Long-term debt consisted of the following:

	As of
	June 30,		December 31,
	2013		2012
ABL Facility	$	56,000	$	14,522
Senior Secured Notes		375,000		375,000
Total long-term debt	$	431,000	$	389,522

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Condensed Consolidating Financial Information - Consolidating Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 461,478	$ 416,979	$ 906,440	$ 860,370
Cost of sales	409,778	369,858	807,824	763,295
Gross profit	51,700	47,121	98,616	97,075
Selling, general and administrative expenses	52,855	37,965	72,533	55,888
Operating income (loss)	(1,155)	9,156	26,083	41,187
Interest expense	9,959	10,209	19,834	19,958
Loss on extinguishment of debt		19,612		19,612
Other (income) expense, net	4	398	191	709
Income (loss) before provision for (benefit from) income taxes and equity income (loss)	(11,118)	(21,063)	6,058	908
Provision for (benefit from) income taxes	6,461	(971)	12,503	7,227
Income (loss) before equity income (loss)	(17,579)	(20,092)	(6,445)	(6,319)
Equity income (loss), net of tax	508	201	860	475
Net income (loss)	(17,071)	(19,891)	(5,585)	(5,844)
Less: Net income attributable to noncontrolling interest	61	114	159	168
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	(17,132)	(20,005)	(5,744)	(6,012)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales
Cost of sales
Gross profit
Selling, general and administrative expenses	4,802	440	5,188	735
Operating income (loss)	(4,802)	(440)	(5,188)	(735)
Interest expense
Loss on extinguishment of debt
Other (income) expense, net
Income (loss) before provision for (benefit from) income taxes and equity income (loss)	(4,802)	(440)	(5,188)	(735)
Provision for (benefit from) income taxes	(1,848)	(169)	(1,997)	(283)
Income (loss) before equity income (loss)	(2,954)	(271)	(3,191)	(452)
Equity income (loss), net of tax	(14,178)	(19,734)	(2,553)	(5,560)
Net income (loss)	(17,132)	(20,005)	(5,744)	(6,012)
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	(17,132)	(20,005)	(5,744)	(6,012)
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales
Cost of sales	(415)	654	116	(1,905)
Gross profit	415	(654)	(116)	1,905
Selling, general and administrative expenses	24,512	17,459	28,856	21,812
Operating income (loss)	(24,097)	(18,113)	(28,972)	(19,907)
Interest expense	9,959	10,209	19,834	19,961
Loss on extinguishment of debt		19,612		19,612
Other (income) expense, net	97	530	187	597
Income (loss) before provision for (benefit from) income taxes and equity income (loss)	(34,153)	(48,464)	(48,993)	(60,077)
Provision for (benefit from) income taxes	(4,553)	(14,784)	(9,953)	(19,161)
Income (loss) before equity income (loss)	(29,600)	(33,680)	(39,040)	(40,916)
Equity income (loss), net of tax	15,422	13,946	36,487	35,356
Net income (loss)	(14,178)	(19,734)	(2,553)	(5,560)
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	(14,178)	(19,734)	(2,553)	(5,560)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	444,057	397,588	872,130	829,135
Cost of sales	394,201	352,200	777,054	738,120
Gross profit	49,856	45,388	95,076	91,015
Selling, general and administrative expenses	22,840	19,389	37,056	32,044
Operating income (loss)	27,016	25,999	58,020	58,971
Interest expense				(3)
Loss on extinguishment of debt
Other (income) expense, net	(213)	67	(83)	251
Income (loss) before provision for (benefit from) income taxes and equity income (loss)	27,229	25,932	58,103	58,723
Provision for (benefit from) income taxes	12,446	14,300	23,690	26,662
Income (loss) before equity income (loss)	14,783	11,632	34,413	32,061
Equity income (loss), net of tax	639	2,314	2,074	3,295
Net income (loss)	15,422	13,946	36,487	35,356
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	15,422	13,946	36,487	35,356
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	25,522	24,807	48,498	44,619
Cost of sales	24,093	22,420	44,842	40,464
Gross profit	1,429	2,387	3,656	4,155
Selling, general and administrative expenses	701	677	1,433	1,297
Operating income (loss)	728	1,710	2,223	2,858
Interest expense
Loss on extinguishment of debt
Other (income) expense, net	120	(199)	87	(139)
Income (loss) before provision for (benefit from) income taxes and equity income (loss)	608	1,909	2,136	2,997
Provision for (benefit from) income taxes	416	(318)	763	9
Income (loss) before equity income (loss)	192	2,227	1,373	2,988
Equity income (loss), net of tax
Net income (loss)	192	2,227	1,373	2,988
Less: Net income attributable to noncontrolling interest	61	114	159	168
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	131	2,113	1,214	2,820
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	(8,101)	(5,416)	(14,188)	(13,384)
Cost of sales	(8,101)	(5,416)	(14,188)	(13,384)
Gross profit
Selling, general and administrative expenses
Operating income (loss)
Interest expense
Loss on extinguishment of debt
Other (income) expense, net
Income (loss) before provision for (benefit from) income taxes and equity income (loss)
Provision for (benefit from) income taxes
Income (loss) before equity income (loss)
Equity income (loss), net of tax	(1,375)	3,675	(35,148)	(32,616)
Net income (loss)	(1,375)	3,675	(35,148)	(32,616)
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Global Brass and Copper Holdings, Inc.	$ (1,375)	$ 3,675	$ (35,148)	$ (32,616)

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earning Per Shares Attributable to Company

The following table sets forth the computation of basic and diluted earnings per share attributable to the Company:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Numerator
Net loss attributable to Global Brass and Copper Holdings, Inc.	$	(17,132	)	$	(20,005	)	$	(5,744	)	$	(6,012	)
Denominator
Weighted-average common shares outstanding		21,110,000			21,110,000			21,110,000			21,110,000
Effect of potentially dilutive securities: Stock options and nonvested share awards		—			—			—			—
Weighted-average common shares outstanding, assuming dilution		21,110,000			21,110,000			21,110,000			21,110,000
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)
Diluted	$	(0.81	)	$	(0.95	)	$	(0.27	)	$	(0.28	)

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Condensed Consolidating Financial Information - Consolidating Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash	$ 34,010	$ 13,862	$ 12,162	$ 49,537
Accounts receivable, net of allowance	203,340	164,317
Inventories	199,549	174,378
Prepaid expenses and other current assets	25,092	12,141
Deferred income taxes	31,760	33,465
Income tax receivable, net	2,147	1,300
Total current assets	495,898	399,463
Property, plant and equipment, net	75,330	71,127
Investment in joint venture	2,168	2,972
Investment in subsidiaries
Intercompany accounts
Goodwill	4,399	4,399
Intangible assets, net	787	839
Deferred income taxes	6,826	6,138
Other noncurrent assets	16,794	17,755
Total assets	602,202	502,693
Current liabilities:
Accounts payable	106,981	81,577
Accrued liabilities	52,685	48,424
Accrued interest	3,395	3,287
Income taxes payable	334	248
Total current liabilities	163,395	133,536
Long-term debt	431,000	389,522
Other noncurrent liabilities	27,678	27,436
Obligations and advances in excess of investment in subsidiary
Intercompany accounts
Total liabilities	622,073	550,494
Commitments and contingencies
Global Brass and Copper Holdings, Inc. stockholder's (deficit) / equity	(23,647)	(51,351)
Noncontrolling interest	3,776	3,550
Total (deficit) / equity	(19,871)	(47,801)	(65,951)	82,660
Total liabilities and (deficit) / equity	602,202	502,693
Parent [Member]
Current assets:
Cash
Accounts receivable, net of allowance
Inventories
Prepaid expenses and other current assets
Deferred income taxes
Income tax receivable, net
Total current assets
Property, plant and equipment, net
Investment in joint venture
Investment in subsidiaries
Intercompany accounts
Goodwill
Intangible assets, net
Deferred income taxes
Other noncurrent assets
Total assets
Current liabilities:
Accounts payable
Accrued liabilities
Accrued interest
Income taxes payable
Total current liabilities
Long-term debt
Other noncurrent liabilities
Obligations and advances in excess of investment in subsidiary	16,502	42,522
Intercompany accounts	7,145	8,829
Total liabilities	23,647	51,351
Commitments and contingencies
Global Brass and Copper Holdings, Inc. stockholder's (deficit) / equity	(23,647)	(51,351)
Noncontrolling interest
Total (deficit) / equity	(23,647)	(51,351)
Total liabilities and (deficit) / equity
Issuer [Member]
Current assets:
Cash	34,457	8,537	12,297	45,302
Accounts receivable, net of allowance	4,815	4,630
Inventories		343
Prepaid expenses and other current assets	10,030	9,229
Deferred income taxes	31,760	33,465
Income tax receivable, net	2,147	1,656
Total current assets	83,209	57,860
Property, plant and equipment, net	985	1,154
Investment in joint venture
Investment in subsidiaries	591,583	522,912
Intercompany accounts
Goodwill
Intangible assets, net
Deferred income taxes	6,826	6,138
Other noncurrent assets	15,878	17,115
Total assets	698,481	605,179
Current liabilities:
Accounts payable	290	1,398
Accrued liabilities	17,494	20,592
Accrued interest	3,395	3,287
Income taxes payable	39	248
Total current liabilities	21,218	25,525
Long-term debt	431,000	389,522
Other noncurrent liabilities	27,678	27,436
Obligations and advances in excess of investment in subsidiary
Intercompany accounts	235,087	205,218
Total liabilities	714,983	647,701
Commitments and contingencies
Global Brass and Copper Holdings, Inc. stockholder's (deficit) / equity	(16,502)	(42,522)
Noncontrolling interest
Total (deficit) / equity	(16,502)	(42,522)
Total liabilities and (deficit) / equity	698,481	605,179
Guarantor Subsidiaries [Member]
Current assets:
Cash
Accounts receivable, net of allowance	182,082	144,533
Inventories	181,937	158,713
Prepaid expenses and other current assets	14,925	2,600
Deferred income taxes
Income tax receivable, net
Total current assets	378,944	305,846
Property, plant and equipment, net	73,999	69,646
Investment in joint venture	2,168	2,972
Investment in subsidiaries	19,336	19,850
Intercompany accounts	253,943	223,081
Goodwill	4,399	4,399
Intangible assets, net	787	839
Deferred income taxes
Other noncurrent assets	916	640
Total assets	734,492	627,273
Current liabilities:
Accounts payable	108,410	77,390
Accrued liabilities	34,455	26,971
Accrued interest
Income taxes payable	44
Total current liabilities	142,909	104,361
Long-term debt
Other noncurrent liabilities
Obligations and advances in excess of investment in subsidiary
Intercompany accounts
Total liabilities	142,909	104,361
Commitments and contingencies
Global Brass and Copper Holdings, Inc. stockholder's (deficit) / equity	591,583	522,912
Noncontrolling interest
Total (deficit) / equity	591,583	522,912
Total liabilities and (deficit) / equity	734,492	627,273
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash	4,207	5,446	3,424	4,648
Accounts receivable, net of allowance	16,443	15,154
Inventories	17,902	15,885
Prepaid expenses and other current assets	195	312
Deferred income taxes
Income tax receivable, net
Total current assets	38,747	36,797
Property, plant and equipment, net	346	327
Investment in joint venture
Investment in subsidiaries
Intercompany accounts
Goodwill
Intangible assets, net
Deferred income taxes
Other noncurrent assets
Total assets	39,093	37,124
Current liabilities:
Accounts payable	3,283	2,910
Accrued liabilities	736	861
Accrued interest
Income taxes payable	251	356
Total current liabilities	4,270	4,127
Long-term debt
Other noncurrent liabilities
Obligations and advances in excess of investment in subsidiary
Intercompany accounts	11,711	9,597
Total liabilities	15,981	13,724
Commitments and contingencies
Global Brass and Copper Holdings, Inc. stockholder's (deficit) / equity	19,336	19,850
Noncontrolling interest	3,776	3,550
Total (deficit) / equity	23,112	23,400
Total liabilities and (deficit) / equity	39,093	37,124
Eliminations [Member]
Current assets:
Cash	(4,654)	(121)	(3,559)	(413)
Accounts receivable, net of allowance
Inventories	(290)	(563)
Prepaid expenses and other current assets	(58)
Deferred income taxes
Income tax receivable, net		(356)
Total current assets	(5,002)	(1,040)
Property, plant and equipment, net
Investment in joint venture
Investment in subsidiaries	(610,919)	(542,762)
Intercompany accounts	(253,943)	(223,081)
Goodwill
Intangible assets, net
Deferred income taxes
Other noncurrent assets
Total assets	(869,864)	(766,883)
Current liabilities:
Accounts payable	(5,002)	(121)
Accrued liabilities
Accrued interest
Income taxes payable		(356)
Total current liabilities	(5,002)	(477)
Long-term debt
Other noncurrent liabilities
Obligations and advances in excess of investment in subsidiary	(16,502)	(42,522)
Intercompany accounts	(253,943)	(223,644)
Total liabilities	(275,447)	(266,643)
Commitments and contingencies
Global Brass and Copper Holdings, Inc. stockholder's (deficit) / equity	(594,417)	(500,240)
Noncontrolling interest
Total (deficit) / equity	(594,417)	(500,240)
Total liabilities and (deficit) / equity	$ (869,864)	$ (766,883)

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Derivative Contracts - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2010	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Senior secured term loan	50.00%
Interest rate cap agreement term		3 years
Derivative collateral included in prepaid expenses and other current assets	$ 267		$ 767
Interest rate cap agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount of Interest Rate Cap Agreements		$ 300,000

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Accrued Liabilities - Components of Accrued liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Other Liabilities Disclosure [Abstract]
Personnel expense	$ 15,727	$ 20,872
Workers' compensation	15,281	15,754
Deferred revenue	11,952
Professional fees	870	2,145
Insurance	2,150	2,253
Utilities	1,607	1,844
Taxes	1,097	1,745
Tooling	712	686
Other	3,289	3,125
Total accrued liabilities	$ 52,685	$ 48,424

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Inventories - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Percentage of material component in inventory	72.00%	72.00%	70.00%
Value of inventory	$ 318	$ 318
Inventories valued at period-end market values	$ 303,937	$ 303,937	$ 319,282

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,328	$ 1,408
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	21,110,000	21,110,000
Common stock, shares outstanding	21,110,000	21,110,000

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Other Noncurrent Assets

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Other Noncurrent Assets

6. Other Noncurrent Assets

Other noncurrent assets consisted of the following:

	As of
	June 30, 2013		December 31, 2012
Deferred financing fees, net	$	15,852	$	17,082
Utility and other deposits		942		668
Interest rate cap agreements		—		1
Other		—		4
Total other noncurrent assets	$	16,794	$	17,755

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Condensed Consolidated Statements of Operations (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Non-cash profits interest expense	$ 29,271	$ 19,517	$ 29,271	$ 19,517

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Fair Value Measurements - Schedule of Inputs Used to Derive Fair Value of Company's Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value	$ 458	$ 549
Open metal contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value	379	379
Open electricity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value	79	167
Open natural gas contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value		2
Interest rate cap agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value		1
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 1 [Member] | Open metal contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 1 [Member] | Open electricity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 1 [Member] | Open natural gas contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 1 [Member] | Interest rate cap agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value	458	549
Level 2 [Member] | Open metal contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value	379	379
Level 2 [Member] | Open electricity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value	79	167
Level 2 [Member] | Open natural gas contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value		2
Level 2 [Member] | Interest rate cap agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value		1
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 3 [Member] | Open metal contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 3 [Member] | Open electricity contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 3 [Member] | Open natural gas contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value
Level 3 [Member] | Interest rate cap agreements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets, fair value

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash	$ 34,010	$ 13,862
Accounts receivable (net of allowance of $1,328 and $1,408 as of June 30, 2013 and December 31, 2012, respectively)	203,340	164,317
Inventories	199,549	174,378
Prepaid expenses and other current assets	25,092	12,141
Deferred income taxes	31,760	33,465
Income tax receivable, net	2,147	1,300
Total current assets	495,898	399,463
Property, plant and equipment, net	75,330	71,127
Investment in joint venture	2,168	2,972
Goodwill	4,399	4,399
Intangible assets, net	787	839
Deferred income taxes	6,826	6,138
Other noncurrent assets	16,794	17,755
Total assets	602,202	502,693
Current liabilities:
Accounts payable	106,981	81,577
Accrued liabilities	52,685	48,424
Accrued interest	3,395	3,287
Income tax payable	334	248
Total current liabilities	163,395	133,536
Long-term debt	431,000	389,522
Other noncurrent liabilities	27,678	27,436
Total liabilities	622,073	550,494
Commitments and contingencies (Note 13)
Global Brass and Copper Holdings, Inc. stockholders' deficit:
Common stock-$.01 par value; 80,000,000 shares authorized; 21,110,000 shares issued and outstanding as of June 30, 2013 and December 31, 2012	211	211
Additional paid-in capital	29,452
Accumulated deficit	(53,897)	(48,153)
Accumulated other comprehensive income	587	1,466
Receivable from stockholder		(4,875)
Total Global Brass and Copper Holdings, Inc. stockholders' deficit	(23,647)	(51,351)
Noncontrolling interest	3,776	3,550
Total (deficit) / equity	(19,871)	(47,801)
Total liabilities and (deficit) / equity	$ 602,202	$ 502,693

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Financing - Components of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Total long-term debt	$ 431,000	$ 389,522
ABL Facility [Member]
Debt Instrument [Line Items]
Long-term debt	56,000	14,522
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Long-term debt	$ 375,000	$ 375,000

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Prepaid Expenses and Other Current Assets (Tables)

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Components of Prepaid Expenses and Other Current Assets

The Company’s prepaid expenses and other current assets are as follows:

	As of
	June 30, 2013		December 31, 2012
Collateral on deposit—commodity derivative contracts	$	267	$	767
Commodity derivative contracts		458		548
Deferred expense		12,003		—
Loss fund payments—workers’ compensation		6,883		6,968
Prepaid insurance		2,131		1,261
Prepaid tooling		1,604		764
Other		1,746		1,833
Total prepaid expenses and other current assets	$	25,092	$	12,141

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Segment Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Information

15. Segment Information

The Company’s Chief Operating Decision Maker allocates resources and evaluates performance at the divisional level. As such, the Company has determined that it has three reportable segments: Olin Brass, Chase and Oster.

Olin Brass is a leading manufacturer and converter of copper and brass sheet, strip and fabricated products. Olin Brass also rerolls and forms other alloys such as stainless, carbon steel and aluminum. Olin Brass’s products are used in five primary end markets: building and housing, munitions, automotive, coinage, and electronics/electrical components.

Chase is a leading manufacturer of brass rod in North America. Chase primarily manufactures brass rod, including round and other shapes, ranging from 1/4 inch to 4.5 inches in diameter. The key attributes of brass rod include its machinability, corrosion resistance and moderate strength, such as valves and fittings. Brass rod is generally manufactured from copper or copper-alloy scrap. Chase produces brass rod used in production applications which can be grouped into four primary end markets: building and housing, transportation, electronics/electrical components and industrial machinery and equipment.

Oster is a processing distributor of copper and copper-alloy sheet, strip and foil. Oster operates six strategically-located service centers in the United States, Puerto Rico and Mexico. Each Oster service center reliably provides a broad range of high quality products at quick lead-times in small quantities. These capabilities, combined with Oster’s operations of precision slitting, hot tinning, traverse winding, cutting, edging and special packaging, provide value to a broad customer base. Oster’s products are used in three primary end markets: building and housing, automotive and electronics/electrical components.

The Chief Operating Decision Maker evaluates performance and determines resource allocations based on a number of factors, the primary performance measure being Segment Adjusted EBITDA.

Segment Adjusted EBITDA is an EBITDA based measure of operating performance, with EBITDA being defined by the Company as net income before depreciation and amortization, interest expense, and income taxes. The Company defines Segment Adjusted EBITDA as EBITDA further adjusted to remove the impacts of inventory values for LIFO and lower of cost or market charges, the cost of terminating certain collateral hedges, unrealized mark to market gains and losses on derivative instruments, non-cash compensation expense, share-based compensation expense, loss on extinguishment of debt and non-cash income accretion related to the Company’s joint venture investment, each of which are excluded because management believes they are not indicative of the ongoing performance of the Company’s core operations. Corporate and Other includes compensation for corporate executives and officers, corporate office and administrative salaries, and professional fees for accounting, tax and legal services. Corporate and Other also includes interest expense, state and Federal income taxes, overhead costs that management has not allocated to our operating segments and the elimination of intercompany balances.

Below is a reconciliation of the Company’s Segment Adjusted EBITDA to income before provision for income taxes and equity income:

			Three Months Ended June 30,						Six Months Ended June 30,
			2013			2012			2013			2012
Net Sales, External Customers
Olin Brass			$	216,500		$	165,803		$	403,065		$	332,090
Chase				164,697			165,922			339,179			354,609
Oster				80,281			85,254			164,196			173,671
Total net sales, external customers			$	461,478		$	416,979		$	906,440		$	860,370
Intersegment Net Sales
Olin Brass			$	14,210		$	12,754		$	28,548		$	25,107
Chase				7			156			7			302
Oster				42			19			108			22
Total intersegment net sales			$	14,259		$	12,929		$	28,663		$	25,431
Segment Adjusted EBITDA
Olin Brass			$	16,233		$	13,062		$	27,683		$	23,751
Chase				18,954			17,251			37,835			37,191
Oster				4,303			5,208			8,853			10,428
Total segment adjusted EBITDA				39,490			35,521			74,371			71,370
Corporate and Other				(8,500	)		(5,550	)		(14,327	)		(9,429	)
Loss on extinguishment of debt				—			(19,612	)		—			(19,612	)
Depreciation and amortization				(2,072	)		(1,681	)		(3,981	)		(3,205	)
Interest expense				(9,959	)		(10,209	)		(19,834	)		(19,958	)
Equity method investment income	(A	)		(327	)		(20	)		(498	)		(113	)
Net income attributable to noncontrolling interest				61			114			159			168
Lower of cost or market adjustment to inventory				(318	)		—			(318	)		—
(Loss) gain on derivative contracts				(41	)		(109	)		(62	)		1,204
Share-based compensation expense				(181	)		—			(181	)		—
Compensation expense—profits interest awards				(29,271	)		(19,517	)		(29,271	)		(19,517	)
(Loss) income before provision for (benefit from) income taxes and equity income			$	(11,118	)	$	(21,063	)	$	6,058		$	908

(A) Excludes accretion income of $181 and $362 in each of the three and six months ended June 30, 2013 and 2012. Equity method investment income is exclusive to Olin Brass.

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Inventories - Summary of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 37,111	$ 37,766
Work-in-process	83,811	69,286
Finished goods	78,627	67,326
Total inventories	$ 199,549	$ 174,378

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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized tax benefits			$ 27,314		$ 27,401
Unrecognized tax benefits that would impact effective tax rate	0		0		0
Estimated interest and penalties related to the underpayment of income taxes	16	179		160
Accrued interest and penalties related to the underpayment of income taxes	51		51		35
Liability for uncertain tax positions	$ 27,365		$ 27,365		$ 27,436

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Segment Information - Reconciliation of Segment Adjusted EBITDA to Income Before Provision for Income Taxes and Equity Income (Parenthetical) (Detail) (Olin Brass [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Olin Brass [Member]
Segment Information [Line Items]
Accretion income	$ 181	$ 181	$ 362	$ 362

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Basis of Presentation and Principles of Consolidation - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended			6 Months Ended
	Jun. 30, 2013 Segment	Jun. 30, 2013 Halkos [Member]	Jun. 30, 2012 Raw material in-transit [Member] Restatement Adjustment [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Raw material in-transit [Member] Restatement Adjustment [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Raw material in-transit [Member] Restatement Adjustment [Member] Inventory, overstated amount [Member]	Jun. 30, 2012 Duplicate Accruals for receipt of raw material [Member] Restatement Adjustment [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Duplicate Accruals for receipt of raw material [Member] Restatement Adjustment [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Duplicate Accruals for receipt of raw material [Member] Restatement Adjustment [Member] Accounts Payable [Member] cost of sales, overstated/understated amount [Member]	Jun. 30, 2012 Workers Compensation Insurance [Member] Restatement Adjustment [Member]	Dec. 31, 2012 Insurance Receivables [Member] Restatement Adjustment [Member] Insurance Receivable [Member]	Dec. 31, 2012 Insurance Receivables [Member] Restatement Adjustment [Member] Accrued Liabilities [Member]	Jun. 30, 2013 IPO [Member]	Jun. 30, 2013 Minimum [Member]	Jun. 30, 2013 Maximum [Member]
Consolidation And Basis Of Presentation [Line Items]
Common stock, shares issued												8,050,000
Percentage of common stock share outstanding		61.50%
Number of reportable segments	3
Percentage of ownership, equity method investment													20.00%	50.00%
Overstated/ understated amount			$ 50	$ 388	$ 811	$ 1,007	$ 1,007	$ 1,396	$ 298	$ 984	$ 984

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of Inputs Used to Derive Fair Value of Company's Assets and Liabilities

The following tables provide the hierarchy of inputs used to derive the fair value of the Company’s assets at fair value on a recurring basis as of June 30, 2013 and December 31, 2012:

	As of June 30, 2013
	Level 1		Level 2		Level 3		Total
Open metal contracts	$	—	$	379	$	—	$	379
Open electricity contracts		—		79		—		79
Total assets	$	—	$	458	$	—	$	458

	As of December 31, 2012
	Level 1		Level 2		Level 3		Total
Open metal contracts	$	—	$	379	$	—	$	379
Open natural gas contracts		—		2		—		2
Open electricity contracts		—		167		—		167
Interest rate cap agreements		—		1		—		1
Total assets	$	—	$	549	$	—	$	549

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Reconciliation of Segment Adjusted EBITDA to Income Before Provision for Income Taxes and Equity Income

Below is a reconciliation of the Company’s Segment Adjusted EBITDA to income before provision for income taxes and equity income:

			Three Months Ended June 30,						Six Months Ended June 30,
			2013			2012			2013			2012
Net Sales, External Customers
Olin Brass			$	216,500		$	165,803		$	403,065		$	332,090
Chase				164,697			165,922			339,179			354,609
Oster				80,281			85,254			164,196			173,671
Total net sales, external customers			$	461,478		$	416,979		$	906,440		$	860,370
Intersegment Net Sales
Olin Brass			$	14,210		$	12,754		$	28,548		$	25,107
Chase				7			156			7			302
Oster				42			19			108			22
Total intersegment net sales			$	14,259		$	12,929		$	28,663		$	25,431
Segment Adjusted EBITDA
Olin Brass			$	16,233		$	13,062		$	27,683		$	23,751
Chase				18,954			17,251			37,835			37,191
Oster				4,303			5,208			8,853			10,428
Total segment adjusted EBITDA				39,490			35,521			74,371			71,370
Corporate and Other				(8,500	)		(5,550	)		(14,327	)		(9,429	)
Loss on extinguishment of debt				—			(19,612	)		—			(19,612	)
Depreciation and amortization				(2,072	)		(1,681	)		(3,981	)		(3,205	)
Interest expense				(9,959	)		(10,209	)		(19,834	)		(19,958	)
Equity method investment income	(A	)		(327	)		(20	)		(498	)		(113	)
Net income attributable to noncontrolling interest				61			114			159			168
Lower of cost or market adjustment to inventory				(318	)		—			(318	)		—
(Loss) gain on derivative contracts				(41	)		(109	)		(62	)		1,204
Share-based compensation expense				(181	)		—			(181	)		—
Compensation expense—profits interest awards				(29,271	)		(19,517	)		(29,271	)		(19,517	)
(Loss) income before provision for (benefit from) income taxes and equity income			$	(11,118	)	$	(21,063	)	$	6,058		$	908

(A) Excludes accretion income of $181 and $362 in each of the three and six months ended June 30, 2013 and 2012. Equity method investment income is exclusive to Olin Brass.

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Investment in Joint Venture

6 Months Ended

Jun. 30, 2013

Equity Method Investments And Joint Ventures [Abstract]

Investment in Joint Venture

5. Investment in Joint Venture

The Company owns a 50% interest in Dowa – Olin Metal Corporation (“Dowa”), a joint venture based in Japan. The Company accounts for Dowa under the equity method of accounting. Due to the timing of the receipt of available financial information, the results of Dowa are recorded on a one-month lag basis.

In November 2007, the equity investment in Dowa, which was purchased as part of the metals business acquired from Olin Corporation, was recorded at a carrying value of zero as a result of the bargain purchase event recognized under the purchase method of accounting for the acquisition, creating a negative basis difference of $9,416. Based on management’s estimate as to the underlying commercial utility of the alloys that Dowa manufactured and sold at the date of acquisition, the negative basis difference is being accreted on a straight-line basis over a 13-year period as an increase to equity earnings. Accretion of the negative basis difference of $181 was reflected in equity income, net of tax in the accompanying consolidated statements of operations for each of the three months ended June 30, 2013 and 2012 and $362 for each of the six months ended June 30, 2013 and 2012. At June 30, 2013 and December 31, 2012, the remaining negative basis difference was $5,373 and $5,735, respectively.

No cash dividends were received from Dowa during the six months ended June 30, 2013. During the six months ended June 30, 2012, the Company received cash dividends from Dowa of $500, which were recorded as a reduction in the Company’s investment in Dowa. During the three months ended June 30, 2013 and 2012, the Company recorded $508 and $201, respectively, of equity income, net of tax, including $181 of accretion of the negative basis difference in each period. During the six months ended June 30, 2013 and 2012, the Company recorded equity income, net of tax of $860 and $475, respectively, including $362 of accretion of the negative basis difference in each period. The undistributed earnings of Dowa in GBC’s retained earnings as of June 30, 2013 and December 31, 2012 totaled $922 and $62, respectively.

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Profits Interest Awards - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Profit Interest Units [Line Items]
Profits interest compensation expense	$ 29,271	$ 19,517	$ 29,271	$ 19,517
Class B Shares [Member]
Profit Interest Units [Line Items]
Profits interest compensation expense			8,902	19,517
Incremental non cash compensation			$ 20,369

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Other Noncurrent Assets (Tables)

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Schedule of Other Noncurrent Assets

Other noncurrent assets consisted of the following:

	As of
	June 30,		December 31,
	2013		2012
Deferred financing fees, net	$	15,852	$	17,082
Utility and other deposits		942		668
Interest rate cap agreements		—		1
Other		—		4
Total other noncurrent assets	$	16,794	$	17,755

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Basis of Presentation and Principles of Consolidation - Summary of Revisions to Consolidated Statement of Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss	$ (17,071)	$ (19,891)	$ (5,585)	$ (5,844)
Comprehensive loss	(17,511)	(20,034)	(6,397)	(5,967)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.	(17,621)	(20,153)	(6,623)	(6,157)
Scenario, Previously Reported [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss		(20,970)		(6,457)
Comprehensive loss		(21,113)		(6,580)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(21,232)		(6,770)
Scenario, Adjustment [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss		1,079		613
Comprehensive loss		1,079		613
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		1,079		613
Scenario Revised [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net loss		(19,891)		(5,844)
Comprehensive loss		(20,034)		(5,967)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		$ (20,153)		$ (6,157)

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Financing

6 Months Ended

Jun. 30, 2013

Debt Disclosure [Abstract]

Financing

8. Financing

Long-term debt consisted of the following:

	As of
	June 30,		December 31,
	2013		2012
ABL Facility	$	56,000	$	14,522
Senior Secured Notes		375,000		375,000
Total long-term debt	$	431,000	$	389,522

Senior Secured Notes

On June 1, 2012, GBC issued $375,000 in aggregate principal amount of 9.50% Senior Secured Notes due 2019 (the “Senior Secured Notes”). The Senior Secured Notes mature on June 1, 2019. Interest on the Senior Secured Notes accrues at the rate of 9.50% per annum and is payable semiannually in arrears on June 1 and December 1, commencing on December 1, 2012.

The credit agreement governing the ABL Facility (hereinafter defined) and the indenture governing the Senior Secured Notes (the “Indenture”) limit the ability of GBC and its subsidiaries to dividend or distribute cash to Holdings and to its equityholders, although ordinary course dividends and distributions to meet the limited holding company expenses and related obligations at Holdings of up to $5 million per year are permitted under those agreements. Under the terms of the Indenture, GBC is also permitted to dividend or distribute to Holdings and its equityholders up to 50% of its “Consolidated Net Income” (as such term is used in the Indenture) from April 1, 2012 to the end of GBC’s most recently ended fiscal quarter. All of the net assets of the subsidiaries are restricted except for $28,629, which are permitted dividend distributions under the Indenture.

Pursuant to a registration rights agreement, dated as of June 1, 2012, the Company is required to effect a registered offer to issue registered new notes (with substantially the same terms as the Senior Secured Notes) in exchange for the Senior Secured Notes that the Company issued in a private offering on June 1, 2012. Pursuant to the terms of the registration rights agreement, if the Company had not caused the registration statement for the exchange offer to become effective within 365 days after June 1, 2012, or otherwise failed to comply with the other deadlines in the registration rights agreement, the Company is required to pay additional interest on the Senior Secured Notes equal to 0.25% per annum for each 90 days it is in default, up to a maximum of 0.50% per annum (the “Additional Interest”).

As of June 1, 2013, the registration statement for the exchange offer had not yet become effective, and accordingly, the Company is now required to pay a default rate of 0.25% per annum in addition to the stated rate of 9.50%. The Company filed a Form S-4 Registration Statement under the Securities Act of 1933 on June 10, 2013 and a subsequent amended Form S-4 Registration Statement on July 24, 2013 with respect to the proposed exchange of the Senior Secured Notes. Upon completion of the exchange offer, the Company’s obligation to pay any future Additional Interest will terminate.

ABL Facility

Concurrent with the issuance of the Senior Secured Notes, the Company amended the agreement governing its asset-based revolving loan facility (the “ABL Facility”).

The unused portion of the ABL Facility was $143,500 and $184,978 as of June 30, 2013 and December 31, 2012, respectively. As of June 30, 2013 and December 31, 2012, amounts outstanding under the ABL Facility accrued interest at a rate of 4.25% and 4.50%, respectively.

The ABL Facility has an expiration date of June 1, 2017 and contains various debt covenants to which the Company is subject on an ongoing basis. As of June 30, 2013, the Company was in compliance with all of its covenants under the ABL Facility.

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Goodwill

6 Months Ended

Jun. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

4. Goodwill

On January 31, 2008, the Company, through its Chase reportable segment, acquired certain assets of the brass business of Bolton Metals Product Company (“Bolton”). As of June 30, 2013 and December 31, 2012, the carrying value of goodwill was $4,399. All goodwill is assigned to Chase, which is the Company’s applicable reporting unit for purposes of testing goodwill impairment. The Bolton acquisition is treated as an asset acquisition for tax purposes. As of June 30, 2013, $2,025 of goodwill is expected to be deductible for tax purposes.

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Condensed Consolidated Statements of Changes in (Deficit)/Equity (USD $) In Thousands	Total	Common stock [Member]	Additional paid-in capital [Member]	(Accumulated deficit)/ Retained Earnings [Member]	Accumulated other comprehensive income [Member]	Receivables from stockholder [Member]	Total Global Brass and Copper Holdings, Inc. stockholder's equity [Member]	Noncontrolling interest [Member]
Stockholder's Equity, Beginning Balance at Dec. 31, 2011	$ 82,660	$ 211	$ 11,091	$ 68,718	$ 1,923	$ (2,451)	$ 79,492	$ 3,168
Profits interest compensation	19,517		19,517				19,517
Distribution to stockholder	(160,000)		(30,608)	(129,392)			(160,000)
Distribution to \ Payments from stockholder	(2,161)					(2,161)	(2,161)
Net (loss) income	(5,844)			(6,012)			(6,012)	168
Other comprehensive (loss) income, net of	(123)				(145)		(145)	22
Stockholder's Equity, Ending Balance at Jun. 30, 2012	(65,951)	211		(66,686)	1,778	(4,612)	(69,309)	3,358
Stockholder's Equity, Beginning Balance at Dec. 31, 2012	(47,801)	211		(48,153)	1,466	(4,875)	(51,351)	3,550
Profits interest compensation	29,271		29,271				29,271
Share-based compensation	181		181				181
Distribution to \ Payments from stockholder	4,875					4,875	4,875
Net (loss) income	(5,585)			(5,744)			(5,744)	159
Other comprehensive (loss) income, net of	(812)				(879)		(879)	67
Stockholder's Equity, Ending Balance at Jun. 30, 2013	$ (19,871)	$ 211	$ 29,452	$ (53,897)	$ 587		$ (23,647)	$ 3,776

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Financing - Additional Information (Detail) (USD $)				1 Months Ended	6 Months Ended
	Jun. 01, 2013	Jun. 30, 2013 ABL Facility [Member]	Dec. 31, 2012 ABL Facility [Member]	Jun. 01, 2012 Senior secured notes [Member]	Jun. 30, 2013 Senior secured notes [Member]	Jun. 30, 2013 Senior secured notes [Member] Minimum [Member]	Jun. 30, 2013 Senior secured notes [Member] Maximum [Member]
Debt Instrument [Line Items]
Aggregate principal amount				$ 375,000
Debt instrument stated interest rate	9.50%			9.50%
Senior Secured Notes maturity period				Jun. 01, 2019
Dividend and cash distributed to meet expenses					5,000,000
Percentage of dividend to net income					50.00%
Restricted net assets of subsidiaries					28,629
Additional interest on the Notes in default						0.25%	0.50%
Debt instrument default interest rate	0.25%
Unused portion of ABL credit facility		$ 143,500	$ 184,978
Interest rate at end of period		4.25%	4.50%

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Goodwill - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Goodwill [Line Items]
Carrying value of goodwill	$ 4,399	$ 4,399
Goodwill deductible for tax purpose	2,025
Chase [Member]
Goodwill [Line Items]
Carrying value of goodwill	$ 4,399	$ 4,399

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Income Taxes (Tables)

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Summary of Effective Income Tax Rate

The effective income tax rate, which is provision for (benefit from) income taxes as a percentage of income (loss) before provision for (benefit from) income taxes and equity income, differs from the amount determined by applying the applicable U.S. statutory federal income tax rate to pretax results primarily as a result of the following:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Statutory provision rate		35.0	%		35.0	%		35.0	%		35.0	%
Permanent differences and other items
State tax provision		(5.4	%)		4.0	%		19.2	%		1.2	%
Section 199 manufacturing credit		5.0	%		(1.7	%)		(16.4	%)		(0.5	%)
Return to provision adjustments / Uncertain tax positions		0.6	%		3.1	%		(2.5	%)		(69.0	%)
Non-deductible non-cash compensation		(92.0	%)		(36.2	%)		169.1	%		838.2	%
Other		(1.3	%)		0.4	%		2.0	%		(9.0	%)
Effective income tax rate		(58.1	%)		4.6	%		206.4	%		795.9	%

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Earnings Per Share - Schedule of Basic and Diluted Earning Per Shares Attributable to Company (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator
Net loss attributable to Global Brass and Copper Holdings, Inc.	$ (17,132)	$ (20,005)	$ (5,744)	$ (6,012)
Denominator
Weighted-average common shares outstanding	21,110,000	21,110,000	21,110,000	21,110,000
Effect of potentially dilutive securities:
Stock options and nonvested share awards
Weighted-average common shares outstanding, assuming dilution	21,110,000	21,110,000	21,110,000	21,110,000
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$ (0.81)	$ (0.95)	$ (0.27)	$ (0.28)
Diluted	$ (0.81)	$ (0.95)	$ (0.27)	$ (0.28)

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Fair Value Measurements - Additional Information (Detail) (Level 2 [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of the Company's Senior Secured Notes	$ 401,250

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Fair Value Measurements

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

11. Fair Value Measurements

ASC 820 defines fair value, establishes a framework for measuring fair value and enhances disclosures about fair value measures required under other accounting pronouncements but does not change existing guidance as to whether or not an instrument is carried at fair value. This guidance also specifies a fair value hierarchy based upon the observability of inputs used in valuation techniques. In accordance with this guidance, fair value measurements are classified under the following hierarchy:

• Level 1—Quoted prices for identical instruments in active markets.

• Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs or significant value-drivers are observable in active markets.

• Level 3—Model-derived valuations in which one or more significant inputs or significant value-drivers are unobservable.

The following tables provide the hierarchy of inputs used to derive the fair value of the Company’s assets at fair value on a recurring basis as of June 30, 2013 and December 31, 2012:

	As of June 30, 2013
	Level 1		Level 2		Level 3		Total
Open metal contracts	$	—	$	379	$	—	$	379
Open electricity contracts		—		79		—		79
Total assets	$	—	$	458	$	—	$	458

	As of December 31, 2012
	Level 1		Level 2		Level 3		Total
Open metal contracts	$	—	$	379	$	—	$	379
Open natural gas contracts		—		2		—		2
Open electricity contracts		—		167		—		167
Interest rate cap agreements		—		1		—		1
Total assets	$	—	$	549	$	—	$	549

In accordance with ASC 820, the Company determines the fair value of its interest rate agreement and commodity derivative contracts using Level 2 inputs.

The Company’s metal, natural gas and electricity commodity derivative contracts are considered Level 2 as fair value measurements consist of both quoted price inputs and inputs provided by a third party that are derived principally from or corroborated by observable market data by correlation. These assumptions include, but are not limited to, those concerning interest rates, credit rates, discount rates, default rates and other factors. All derivative commodity contracts have a set term of 24 months or less.

The Company’s interest rate cap agreements are considered Level 2 fair value measurements as the pricing is derived from discounting the future expected cash flows that would occur if variable interest rates rise above the strike rates of the caps. The variable interest rates used in the calculation of projected cash flows on the caps are based on an expectation of future interest rates derived from observable market interest rate curves (LIBOR forward curves) and volatilities that are observable at commonly quoted intervals.

The Company does not hold assets or liabilities requiring a Level 3 measurement and there have not been any transfers between the hierarchy levels during 2013 or 2012.

For purposes of financial reporting, the Company has determined that the carrying value of cash, accounts receivable, accounts payable, and accrued expenses approximates fair value due to the short maturities of these instruments. Additionally, given the revolving nature and the variable interest rates, the Company has determined that the carrying value of the ABL Facility also approximates fair value. As of June 30, 2013, the fair value of the Company’s Senior Secured Notes approximated $401,250. The fair value of the Senior Secured Notes was based upon quotes from financial institutions (Level 2 in the fair value hierarchy as defined by ASC 820).

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Accrued Liabilities

6 Months Ended

Jun. 30, 2013

Payables And Accruals [Abstract]

Accrued Liabilities

7. Accrued Liabilities

Accrued liabilities consisted of the following:

	As of
	June 30, 2013		December 31, 2012
Personnel expense	$	15,727	$	20,872
Workers’ compensation		15,281		15,754
Deferred revenue		11,952		—
Professional fees		870		2,145
Insurance		2,150		2,253
Utilities		1,607		1,844
Taxes		1,097		1,745
Tooling		712		686
Other		3,289		3,125
Total accrued liabilities	$	52,685	$	48,424

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Stock Split - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013
Equity [Line Items]
Stock split Ratio	211,100
IPO [Member]
Equity [Line Items]
Common stock, Shares issued under initial public offering	8,050,000
Common stock per share value issued to underwriters	$ 11
Scenario, Adjustment [Member]
Equity [Line Items]
Adjustment to accumulated deficit	$ 211

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Profits Interest Awards

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Profits Interest Awards

14. Profits Interest Awards

Halkos has granted, pursuant to the Halkos Equity Plan, non-voting membership interests to select members of the Company’s management titled “Class B Shares.” The Class B Shares are profits interests in Halkos.

Certain members of the Company’s management may receive distributions from Halkos to the extent their Class B Shares were vested. During the six months ended June 30, 2013 and 2012, GBC executives received $8,902 and $19,517, respectively. These distributions were accounted for by GBC as non-cash compensation expense with a corresponding increase in additional paid-in capital in the period in which the distributions were determined to be probable.

In June 2013, Halkos modified the Halkos Equity Plan to (i) eliminate its right to acquire all or a portion of the Class B Shares for less than fair market value for certain specifically identified employees and (ii) eliminate its right to acquire all or a portion of the Class B Shares for less than fair market value upon either (a) voluntary termination of employment without good reason or (b) breach of confidentiality or non-compete provisions subsequent to terminating employment for all other Class B Share award recipients. This modification to the Halkos Equity Plan triggered the recognition of additional non-cash compensation expense reflecting the fair value of vested Class B Shares as of the date of modification of the Halkos Equity Plan. The observable market price of the Company’s publicly traded shares was used to determine the fair value of the Class B Shares. In June 2013, the Company recognized $20,369 of incremental non-cash compensation as a result of the modification.

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Related Parties

6 Months Ended

Jun. 30, 2013

Related Party Transactions [Abstract]

Related Parties

12. Related Parties

KPS Special Situations Fund II, L.P., KPS Special Situations Fund II (A), L.P., KPS Special Situations Fund III, L.P. and KPS Special Situations Fund III (A), L.P. (together, “KPS Funds”) are majority shareholders of Halkos. As of June 30, 2013, Halkos owned 61.5% of the outstanding shares of Holdings.

The Company and affiliates of KPS Funds entered into an agreement whereby affiliates of KPS Funds charge the Company for services of their personnel engaged in line or staff functions relating specifically to the operations of the Company (the “Management Services Agreement”). In May 2013, in connection with the IPO, the Company terminated the Management Services Agreement prior to the expiration of the initial term and was required to pay the affiliates of KPS Funds an early termination fee equal to the value of the advisory fee that would have otherwise been payable to the affiliates of KPS Funds through the end of the Management Services Agreement. The Company paid $4,500 to the affiliates of KPS Funds related to the Company’s early termination and all unpaid management advisory fees. The total charges, which are included in selling, general and administrative expenses, were $4,500 and $4,750 for the three and six months ended June 30, 2013, respectively, and $250 and $500 for the three and six months ended June 30, 2012, respectively. As of December 31, 2012, $250 of these charges were accrued for in accrued liabilities. Additionally, pursuant to the Management Services Agreement, the Company is required to reimburse the affiliates of KPS Funds for all reasonable costs and expenses incurred in connection with the services provided. These costs were $7 and $18 for the three and six months ended June 30, 2013, respectively, and $21 and $62 for the three and six months ended June 30, 2012, respectively.

The Company and KPS Funds entered into an agreement dated October 18, 2011 whereby the KPS Funds agreed to reimburse the Company for specific incremental costs directly attributable to an offering of equity securities (the “KPS Reimbursement Obligation”). As of December 31, 2012, the Company had recorded $4,875 as a receivable from stockholder pertaining to the KPS Reimbursement Obligation. Pursuant to the completion of the Company’s initial public offering, KPS Funds reimbursed the Company all amounts owed in connection with the KPS Reimbursement Obligation.

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Document and Entity Information	6 Months Ended
	Jun. 30, 2013	Aug. 09, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	BRSS
Entity Registrant Name	GLOBAL BRASS & COPPER HOLDINGS, INC.
Entity Central Index Key	0001533526
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		21,110,000

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

13. Commitments and Contingencies

Environmental Considerations

The Company is subject to a variety of environmental laws and regulations governing discharges to air and water, the handling, storage and disposal of hazardous or solid waste materials and the remediation of contamination associated with releases of hazardous substances. Although the Company believes it is in material compliance with all of the various regulations applicable to its business, there can be no assurance that requirements will not change in the future or that the Company will not incur significant cost to comply with such requirements. The Company employs responsible personnel at each facility, along with various environmental engineering consultants from time to time to assist with ongoing management of environmental, health and safety requirements. Management expenses environmental costs related to existing conditions resulting from past or current operations and from which no current or future benefit is discernible. Expenditures that extend the life of the related property are capitalized. The Company determines its liability on a location by location basis and records a liability at the time it is deemed probable and can be reasonably estimated. The Company is currently not aware of any environmental matters which may have a material impact on the Company’s financial position, results of operations, or liquidity.

On November 19, 2007 (the date of inception of GBC), the Company acquired the assets and operations relating to the worldwide metals business of Olin Corporation. Olin Corporation agreed to retain liability arising out of the existing conditions on certain of our properties for any remedial actions required by environmental laws, and agreed to indemnify the Company for all or part of a number of other environmental liabilities. Since 2007, Olin Corporation has been performing remedial actions at the facilities in East Alton, Illinois and Waterbury, Connecticut, and has been participating in remedial actions at certain other properties as well. If Olin Corporation were to stop its environmental remedial activities at the Company’s properties, the Company could be required to assume responsibility for these activities, the cost of which could be material.

Insurance Coverage

The Company maintains Comprehensive Medical Plans for employees of GBC and its subsidiaries (the “Plans”) to provide health insurance for eligible employees on a self-insured basis. The Plans are covered by a stop loss policy for those benefits provided on a self-insured basis with a deductible of $275 per occurrence for all GBC employees, except for employees of our Chase Brass division, which has a deductible of $100 per occurrence. The policy for our Chase Brass division also has a specific stop loss maximum resulting in the Company being responsible for paying the amount in excess of $2,000 per occurrence.

The Company is self-insured for workers’ compensation claims assumed from its predecessor company for activity prior to November 19, 2007. Workers’ compensation claims relating to activity after November 19, 2007 are covered by a loss funding insurance arrangement whereby the Company makes a fixed payment to the insurer which is used to pay submitted claims. The Company is self-insured for annual workers’ compensation costs relating to activity after November 19, 2007 of up to $500 per occurrence.

Legal Considerations

The Company is party to various legal proceedings arising in the ordinary course of business. The Company believes that none of its lawsuits are individually material or that the aggregate exposure of all of its lawsuits, including those that are probable and those that are only reasonably possible, is material to its financial condition, results of operations or cash flows.

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Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Nov. 19, 2007
Chase [Member]
Commitments And Contingencies [Line Items]
Comprehensive Medical Plans, Stop loss policy deductible	$ 100
Maximum comprehensive Medical Plans, Stop loss policy deductible	2,000
Annual workers' compensation costs		500
Global Brass and Copper Employees Excluding Chase [Member]
Commitments And Contingencies [Line Items]
Comprehensive Medical Plans, Stop loss policy deductible	$ 275

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Related Parties - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Related Party Transaction [Line Items]
Accrued liabilities under Management Services Agreement						$ 250
Termination fee and management advisory fees	4,500
Reimbursement cost under Management Services Agreement		7	21	18	62
Receivable from stockholder under KPS Reimbursement Obligation						4,875
Selling, General and Administrative Expenses [Member]
Related Party Transaction [Line Items]
Selling, general and administrative expenses under Management Services Agreement		$ 4,500	$ 250	$ 4,750	$ 500
Halkos [Member]
Related Party Transaction [Line Items]
Outstanding shares of holdings		61.50%		61.50%