amkr-20230331

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

AMKOR TECHNOLOGY, INC.

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)


	For the Three Months Ended March 31,
	2023		2022
	(In thousands, except per share data)
Net sales	$	1,471,539	$	1,596,816
Cost of sales	1,277,118		1,271,486
Gross profit	194,421		325,330
Selling, general and administrative	78,671		76,959
Research and development	47,047		38,363

Total operating expenses	125,718		115,322
Operating income	68,703		210,008
Interest expense	16,167		14,148

Other (income) expense, net	(3,552)		(5,096)
Total other expense, net	12,615		9,052
Income before taxes	56,088		200,956
Income tax expense	10,864		29,728
Net income	45,224		171,228
Net loss (income) attributable to non-controlling interests	127		(565)
Net income attributable to Amkor	$	45,351	$	170,663

Net income attributable to Amkor per common share:
Basic	$	0.18	$	0.70
Diluted	$	0.18	$	0.69

Shares used in computing per common share amounts:
Basic	245,330		244,403
Diluted	247,087		246,000

The accompanying notes are an integral part of these statements.

-3-

AMKOR TECHNOLOGY, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Net income	$	45,224	$	171,228
Other comprehensive income (loss), net of tax:
Adjustments to net unrealized gains (losses) on available-for-sale debt investments	601		(1,077)
Adjustments to unrealized components of defined benefit pension plans	(97)		4
Foreign currency translation	(2,113)		(8,409)

Total other comprehensive income (loss)	(1,609)		(9,482)
Comprehensive income	43,615		161,746
Comprehensive loss (income) attributable to non-controlling interests	127		(565)
Comprehensive income attributable to Amkor	$	43,742	$	161,181

The accompanying notes are an integral part of these statements.

-4-

AMKOR TECHNOLOGY, INC.

CONSOLIDATED BALANCE SHEETS

(Unaudited)


	March 31, 2023		December 31, 2022
	(In thousands, except per share data)
ASSETS
Current assets:
Cash and cash equivalents	$	909,802	$	959,072

Short-term investments (amortized cost of $342,872 and $283,641 in 2023 and 2022, respectively)	341,822		281,964
Accounts receivable, net of allowances	1,165,240		1,365,504
Inventories	568,565		629,576
Other current assets	48,174		65,123
Total current assets	3,033,603		3,301,239
Property, plant and equipment, net	3,185,278		3,135,614
Operating lease right of use assets	152,650		171,163
Goodwill	21,235		21,517
Restricted cash	3,497		3,334
Other assets	185,528		188,890
Total assets	$	6,581,791	$	6,821,757
LIABILITIES AND EQUITY
Current liabilities:
Short-term borrowings and current portion of long-term debt	$	137,469	$	143,813
Trade accounts payable	666,615		899,164
Capital expenditures payable	228,056		146,602
Short-term operating lease liability	64,235		70,991
Accrued expenses	361,174		401,841
Total current liabilities	1,457,549		1,662,411
Long-term debt	1,059,997		1,088,521
Pension and severance obligations	91,359		93,540
Long-term operating lease liabilities	63,278		75,745
Other non-current liabilities	182,445		201,839
Total liabilities	2,854,628		3,122,056
Commitments and contingencies (Note 15)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, designated Series A, none issued	—		—
Common stock, $0.001 par value, 500,000 shares authorized; 291,814 and 291,249 shares issued; and 245,545 and 245,091 shares outstanding in 2023 and 2022, respectively	292		291
Additional paid-in capital	2,001,575		1,996,344
Retained earnings	1,901,569		1,874,644
Accumulated other comprehensive income (loss)	15,090		16,699
Treasury stock, at cost, 46,269 and 46,158 shares in 2023 and 2022, respectively	(222,049)		(219,226)
Total Amkor stockholders’ equity	3,696,477		3,668,752
Non-controlling interests in subsidiaries	30,686		30,949
Total equity	3,727,163		3,699,701
Total liabilities and equity	$	6,581,791	$	6,821,757

The accompanying notes are an integral part of these statements.

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AMKOR TECHNOLOGY, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Unaudited)


				Additional Paid- In Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)					Total Amkor Stockholders’ Equity		Noncontrolling Interest in Subsidiaries		Total Equity
	Common Stock									Treasury Stock
	Shares	Par Value								Shares	Cost
	(In thousands)












Balance at December 31, 2022	291,249	$	291	$	1,996,344	$	1,874,644	$	16,699	(46,158)	$	(219,226)	$	3,668,752	$	30,949	$	3,699,701
Net income	—	—		—		45,351		—		—	—		45,351		(127)		45,224
Other comprehensive income (loss)	—	—		—		—		(1,609)		—	—		(1,609)		—		(1,609)


Treasury stock acquired through surrender of shares for tax withholding	—	—		—		—		—		(111)	(2,823)		(2,823)		—		(2,823)
Issuance of stock through share-based compensation plans	565	1		1,523		—		—		—	—		1,524		—		1,524
Share-based compensation	—	—		3,708		—		—		—	—		3,708		—		3,708
Cash dividends declared ($0.075 per common share)	—	—		—		(18,426)		—		—	—		(18,426)		—		(18,426)
Subsidiary dividends to non-controlling interests	—	—		—		—		—		—	—		—		(136)		(136)
Balance at March 31, 2023	291,814	$	292	$	2,001,575	$	1,901,569	$	15,090	(46,269)	$	(222,049)	$	3,696,477	$	30,686	$	3,727,163


















Balance at December 31, 2021	290,466	$	290	$	1,977,134	$	1,163,939	$	19,978	(46,151)	$	(219,065)	$	2,942,276	$	30,270	$	2,972,546
Net income	—	—		—		170,663		—		—	—		170,663		565		171,228
Other comprehensive income (loss)	—	—		—		—		(9,482)		—	—		(9,482)		—		(9,482)


Treasury stock acquired through surrender of shares for tax withholding	—	—		—		—		—		(4)	(82)		(82)		—		(82)
Issuance of stock through share-based compensation plans	221	1		1,482		—		—		—	—		1,483		—		1,483
Share-based compensation	—	—		3,497		—		—		—	—		3,497		—		3,497
Cash Dividends declared ($0.05 per common share)	—	—		—		(12,232)		—		—	—		(12,232)		—		(12,232)
Subsidiary dividends to non-controlling interests	—	—		—		—		—		—	—		—		(136)		(136)
Balance at March 31, 2022	290,687	$	291	$	1,982,113	$	1,322,370	$	10,496	(46,155)	$	(219,147)	$	3,096,123	$	30,699	$	3,126,822

The accompanying notes are an integral part of these statements.

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AMKOR TECHNOLOGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Cash flows from operating activities:
Net income	$	45,224	$	171,228
Depreciation and amortization	156,762		148,192


Other operating activities and non-cash items	(2,821)		11,061
Changes in assets and liabilities	(23,419)		(164,303)
Net cash provided by operating activities	175,746		166,178
Cash flows from investing activities:
Payments for property, plant and equipment	(98,224)		(158,154)
Proceeds from sale of property, plant and equipment	652		416

Proceeds from foreign exchange forward contracts	20,267		1,828
Payments for foreign exchange forward contracts	(20,358)		(29,803)
Payments for short-term investments	(172,409)		(125,693)
Proceeds from sale of short-term investments	21,549		4,246
Proceeds from maturities of short-term investments	92,655		66,694
Other investing activities	164		457
Net cash used in investing activities	(155,704)		(240,009)
Cash flows from financing activities:
Proceeds from revolving credit facilities	370,000		—
Payments of revolving credit facilities	(370,000)		—
Proceeds from short-term debt	11,042		18,112
Payments of short-term debt	(5,840)		(3,790)
Proceeds from issuance of long-term debt	—		150,000

Payments of long-term debt	(35,980)		(35,973)




Payments of finance lease obligations	(15,148)		(7,538)



Payments of dividends	(18,430)		(12,228)
Other financing activities	(1,850)		653
Net cash (used in) provided by financing activities	(66,206)		109,236
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	(2,943)		(7,795)
Net (decrease) increase in cash, cash equivalents and restricted cash	(49,107)		27,610
Cash, cash equivalents and restricted cash, beginning of period	962,406		831,521
Cash, cash equivalents and restricted cash, end of period	$	913,299	$	859,131
Non-cash investing and financing activities:
Property, plant and equipment included in capital expenditures payable	$	177,615	$	268,146

Right of use assets acquired through finance lease liabilities	17,513		6,438
Right of use assets acquired through operating lease liabilities	3,180		27,246

The accompanying notes are an integral part of these statements.

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Interim Financial Statements

Basis of Presentation. The Consolidated Financial Statements and related disclosures as of March 31, 2023, and for the three months ended March 31, 2023 and 2022, contained in this Form 10-Q (the “Consolidated Financial Statements”) are unaudited, pursuant to the rules and regulations of the SEC. The December 31, 2022 Consolidated Balance Sheet data contained in this Form 10-Q 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 financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the Consolidated Financial Statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of the results for the interim periods and should be read in conjunction with the financial statements included in the 2022 Form 10-K. The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the results to be expected for the full year ending December 31, 2023. Unless the context otherwise requires, all references to “Amkor,” “we,” “us” or “our” are to Amkor Technology, Inc. and its wholly and majority-owned subsidiaries.

Use of Estimates. The Consolidated Financial Statements have been prepared in conformity with U.S. GAAP, using management’s best estimates and judgments where appropriate. These estimates and judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The estimates and judgments will also affect the reported amounts for certain revenues and expenses during the reporting period. Actual results could differ materially from these estimates and judgments, as a result of, for example, any worsening of the global business and economic environment.

Goodwill. The balance of goodwill in the Consolidated Balance Sheets contained in this Form 10-Q reflects adjustments for foreign currency translation.

Unbilled Receivables. Total unbilled receivables as of March 31, 2023 and December 31, 2022 were $248.9 million and $301.7 million, respectively.

Contract Liabilities. Contract liabilities were $157.1 million and $170.6 million as of March 31, 2023 and December 31, 2022, respectively. As of March 31, 2023 and December 31, 2022, the short-term portions of the liabilities were $80.6 million and $81.5 million, respectively. The remainder of the March 31, 2023 contract liability balance is expected to be recognized in revenue over the next 1-5 years. Revenue recognized during the three months ended March 31, 2023 and 2022 that was included in the contract liabilities balance at the beginning of the period was $21.5 million and $28.9 million, respectively.

2. Net Sales by Product Group and End Market

The following table presents our net sales by product group.


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Advanced products (1)	$	1,067,377	$	1,156,508
Mainstream products (2)	404,162		440,308
Total net sales	$	1,471,539	$	1,596,816

(1) Advanced products include flip chip, memory and wafer-level processing and related test services.

(2) Mainstream products include all other wirebond packaging and related test services.

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Net sales by end market consist of the following:


	For the Three Months Ended March 31,
	2023		2022
Communications (smartphones, tablets)	45	%	41	%
Automotive, industrial and other (ADAS, electrification, infotainment, safety)	26	%	21	%
Consumer (AR & gaming, connected home, home electronics, wearables)	12	%	19	%
Computing (data center, infrastructure, PC/laptop, storage)	17	%	19	%
Total net sales	100	%	100	%

3. Other Income and Expense

Other income and expense consist of the following:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Interest income	$	(10,433)	$	(603)
Foreign currency loss (gain), net	6,763		(4,301)
Loss on debt retirement	—		97


Other	118		(289)
Total other (income) expense, net	$	(3,552)	$	(5,096)

4. Income Taxes

Income tax expense of $10.9 million for the three months ended March 31, 2023 reflects income taxes, foreign withholding taxes and minimum taxes.

We maintain a valuation allowance on certain U.S. and foreign deferred tax assets. Such valuation allowances are released as the related tax benefits are realized or when sufficient evidence exists to conclude that it is more likely than not that the deferred tax assets will be realized.

Unrecognized tax benefits represent reserves for potential tax deficiencies or reductions in tax benefits that could result from federal, state or foreign tax audits. Gross unrecognized tax benefits increased from $33.3 million as of December 31, 2022 to $33.9 million as of March 31, 2023. All of our unrecognized tax benefits would reduce our effective tax rate if recognized. Our unrecognized tax benefits are subject to change for effective settlement of examinations, changes in the recognition threshold of tax positions, the expiration of statutes of limitations and other factors.

We have tax returns that are open to examination in various jurisdictions for tax years 2012-2022. The open years contain matters that could be subject to differing interpretations of applicable tax laws and regulations related to the amount and/or timing of income, deductions and tax credits. There can be no assurance that the outcome of the examinations will be favorable. In certain circumstances where we elect to appeal the results of an examination, we may be required to make tax assessment payments to proceed with the administrative appeal process.

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

5. Earnings Per Share

Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amkor common stockholders by the weighted-average number of common shares outstanding during the period. The weighted-average number of common shares outstanding is reduced for treasury stock.

Diluted EPS is computed based on the weighted-average number of common shares outstanding plus the effect of dilutive potential common shares outstanding during the period. Dilutive potential common shares include outstanding stock options, performance-vested restricted stock units, time-vested restricted stock units and unvested restricted shares.

The following table summarizes the computation of basic and diluted EPS:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands, except per share data)
Net income attributable to Amkor common stockholders	$	45,351	$	170,663




Weighted-average number of common shares outstanding - basic	245,330		244,403
Effect of dilutive securities:
Share-based awards	1,757		1,597
Weighted-average number of common shares outstanding - diluted	247,087		246,000
Net income attributable to Amkor per common share:
Basic	$	0.18	$	0.70
Diluted	0.18		0.69

There were no anti-dilutive shares for the three months ended March 31, 2023 and 2022.

6. Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss), net of tax, consist of the following:


	Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1)		Defined Benefit Pension (2)		Foreign Currency Translation		Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2022	$	(1,573)	$	14,220	$	4,052	$	16,699
Other comprehensive income (loss) before reclassifications	645		—		(2,113)		(1,468)
Amounts reclassified from accumulated other comprehensive income (loss)	(44)		(97)		—		(141)
Other comprehensive income (loss)	601		(97)		(2,113)		(1,609)
Accumulated other comprehensive income (loss) at March 31, 2023	$	(972)	$	14,123	$	1,939	$	15,090

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)


	Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1)		Defined Benefit Pension (2)		Foreign Currency Translation		Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2021	$	(348)	$	5,616	$	14,710	$	19,978
Other comprehensive income (loss) before reclassifications	(1,087)		—		(8,409)		(9,496)
Amounts reclassified from accumulated other comprehensive income (loss)	10		4		—		14
Other comprehensive income (loss)	(1,077)		4		(8,409)		(9,482)
Accumulated other comprehensive income (loss) at March 31, 2022	$	(1,425)	$	5,620	$	6,301	$	10,496

(1) Amounts reclassified out of accumulated other comprehensive income (loss) are included as other (income) expense, net (Note 3).

(2) Amounts reclassified out of accumulated other comprehensive income (loss) are included as a component of net periodic pension cost (Note 12) or other (income) expense, net (Note 3).

-11-

AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

7. Investments

All of our available-for-sale debt investments as of March 31, 2023 are available to fund current operations and are recorded at fair value (Note 14).

The following table summarizes our cash equivalents and available-for-sale debt investments:


	March 31, 2023
									Fair Value Level
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses (1)		Total Fair Value		Level 1		Level 2
	(In thousands)
Cash equivalents
Asset-backed securities	$	849	$	—	$	—	$	849	$	—	$	849

Commercial paper	26,801		—		—		26,801		—		26,801
Corporate bonds	12,519		—		(5)		12,514		—		12,514

Money market funds	64,433		—		—		64,433		64,433		—

Municipal bonds	1,010		—		—		1,010		—		1,010
U.S. government agency bonds	1,494		—		—		1,494		—		1,494
U.S. government bonds	15,917		3		—		15,920		15,920		—
Variable rate demand notes	1,004		—		—		1,004		—		1,004
Total cash equivalents (2)	124,027		3		(5)		124,025		80,353		43,672

Short-term investments
Asset-backed securities	24,201		8		(79)		24,130		—		24,130
Certificate of deposits	16,096		—		—		16,096		16,096		—
Commercial paper	37,079		—		—		37,079		—		37,079
Corporate bonds	226,134		54		(1,073)		225,115		—		225,115
Foreign government bonds	2,086		—		—		2,086		—		2,086
Mortgage-backed securities	381		—		(1)		380		—		380
Municipal bonds	363		—		(1)		362		—		362
U.S. government agency bonds	6,385		6		(7)		6,384		—		6,384
U.S. government bonds	25,646		47		(4)		25,689		25,689		—

Total short-term investments	338,371		115		(1,165)		337,321		41,785		295,536
Total	$	462,398	$	118	$	(1,170)	$	461,346	$	122,138	$	339,208

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)


	December 31, 2022
									Fair Value Level
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses (1)		Total Fair Value		Level 1		Level 2
	(In thousands)
Cash equivalents
Asset-backed securities	$	25	$	—	$	—	$	25	$	—	$	25

Commercial paper	69,101		—		—		69,101		—		69,101

Money market funds	97,650		—		—		97,650		97,650		—

Municipal bonds	1,001		—		—		1,001		—		1,001
U.S. government agency bonds	16,982		3		—		16,985		—		16,985
U.S. government bonds	10,767		1		—		10,768		10,768		—
Total cash equivalents	195,526		4		—		195,530		108,418		87,112

Short-term investments
Asset-backed securities	25,677		7		(134)		25,550		—		25,550
Certificate of deposits	17,362		—		—		17,362		17,362		—
Commercial paper	27,866		—		—		27,866		—		27,866
Corporate bonds	198,868		7		(1,529)		197,346		—		197,346
Foreign government bonds	996		—		(4)		992		—		992
Mortgage-backed securities	696		—		(2)		694		—		694
Municipal bonds	364		—		(2)		362		—		362
U.S. government agency bonds	735		—		(1)		734		—		734
U.S. government bonds	6,704		1		(20)		6,685		6,685		—

Total short-term investments	279,268		15		(1,692)		277,591		24,047		253,544
Total	$	474,794	$	19	$	(1,692)	$	473,121	$	132,465	$	340,656

(1)All unrealized losses have been in a continuous loss position for less than 12 months. We do not intend to sell the investments in an unrealized loss position, and it is not more likely than not that we will be required to sell these investments before recovery of their amortized cost bases.

(2)For three months ended March 31, 2023 and 2022, we sold cash equivalent investments for proceeds of $13.0 million and $0.9 million, respectively, and realized no gain or loss on such sales.

The following table summarizes the contractual maturities of our cash equivalents and available-for-sale debt investments as of March 31, 2023:


	Amortized Cost		Fair Value
	(In thousands)
Within 1 year	$	350,678	$	349,880
After 1 year through 5 years	109,987		109,734
After 5 years through 10 years	728		729
After 10 years	1,005		1,003
Total	$	462,398	$	461,346

Actual maturities can differ from contractual maturities due to various factors including the issuers may have the right to call or prepay obligations without call or prepayment penalties.

-13-

AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

As of March 31, 2023, the amortized cost and the fair market value of our held-to-maturity government bond (Level 1) maturing within a year was $4.5 million. As of December 31, 2022, the amortized cost and the fair market value of our held-to-maturity government bond (Level 1) maturing within a year was $4.4 million and $4.3 million, respectively.

8. Factoring of Accounts Receivable

For certain accounts receivable, we use non-recourse factoring arrangements with third-party financial institutions to manage our working capital and cash flows. Under these arrangements, we sell receivables to a financial institution for cash at a discount to the face amount. As part of the factoring arrangements, we perform certain collection and administrative functions for the receivables sold. For the three months ended March 31, 2023 and 2022, we sold receivables totaling $78.0 million and $92.2 million, respectively, net of discounts and fees of $0.2 million for each period.

9. Property, Plant and Equipment

Property, plant and equipment consist of the following:


	March 31, 2023		December 31, 2022
	(In thousands)
Land	$	214,212	$	214,763
Buildings and improvements	1,822,847		1,817,135
Machinery and equipment	6,808,824		6,757,652
Finance lease assets	182,256		165,122
Furniture, fixtures and other equipment	23,487		23,240
Software and computer equipment	244,006		240,610
Construction in progress	249,018		152,809
Total property, plant and equipment	9,544,650		9,371,331
Accumulated depreciation and amortization	(6,359,372)		(6,235,717)
Total property, plant and equipment, net	$	3,185,278	$	3,135,614

The following table summarizes our depreciation expense:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Depreciation expense	$	156,614	$	148,040

As of March 31, 2023 and December 31, 2022, we had $134.8 million and $79.6 million of costs, including capitalized interest of $1.7 million and $0.7 million, respectively, in construction in progress for the Vietnam Facility.

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

10. Accrued Expenses

Accrued expenses consist of the following:


	March 31, 2023		December 31, 2022
	(In thousands)
Payroll and benefits	$	99,037	$	137,445

Deferred revenue and customer advances	80,558		81,459
Income taxes payable	60,831		50,685
Short-term finance lease liabilities	60,813		56,570
Accrued severance plan obligations	7,107		7,422
Accrued interest	2,443		10,878
Other accrued expenses	50,385		57,382
Total accrued expenses	$	361,174	$	401,841

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

11. Debt

Following is a summary of short-term borrowings and long-term debt:


	March 31, 2023		December 31, 2022
	(In thousands)
Debt of Amkor Technology, Inc.:
Senior notes:
6.625% Senior notes, due September 2027	$	525,000	$	525,000
Debt of subsidiaries:
Amkor Technology Korea, Inc.:
Term loan, fixed rate at 1.85%, due April 2024 (1)	—		—
Term loan, fixed rate at 2.12%, due December 2028	200,000		200,000
Amkor Technology Japan, Inc.:
Short-term term loans, variable rate (2)	9,235		4,042
Term loan, fixed rate at 1.30%, due July 2023	19,569		29,744
Term loan, fixed rate at 1.35%, due December 2024	75,079		86,943
Term loan, fixed rate at 1.20%, due December 2025	45,123		49,878
Term loan, fixed rate at 1.23%, due December 2026	73,950		79,927
Term loan, fixed rate at 1.59%, due December 2027	112,261		119,738
Amkor Assembly & Test (Shanghai) Co., Ltd.:
Term loans, LIBOR plus 1.10%, weighted average of 6.25% as of March 31, 2023, due March 2024	46,000		46,000
Term loans, LIBOR plus 0.80%, weighted average of 5.74% as of March 31, 2023, due June 2025	39,000		39,000
Term loans, LIBOR plus 0.75%, weighted average of 5.81% as of March 31, 2023, due 2025	59,000		59,500
Other:
Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) (3)	—		—
$600.0 million senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) (4)	—		—
	1,204,217		1,239,772
Less: Unamortized discount and deferred debt costs, net	(6,751)		(7,438)
Less: Short-term borrowings and current portion of long-term debt	(137,469)		(143,813)
Long-term debt	$	1,059,997	$	1,088,521

(1)In April 2021, we entered into a ₩80 billion term loan agreement with the option to borrow and re-borrow the funds up to six times per year through April 2024. Principal is payable at maturity, and interest is payable monthly, at a fixed rate of 1.85%. As of March 31, 2023, ₩80.0 billion, or approximately $61 million, was available to be drawn.

(2)We entered into various short-term term loans which mature semiannually. Principal and interest are payable in monthly installments. Interest as of March 31, 2023 is at an annual base rate equal to the Tokyo Interbank Offered Rate plus 0.18% to 0.27% (weighted average of 0.26% as of March 31, 2023). As of March 31, 2023, $5.8 million was available to be drawn.

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

(4)In March 2022, Amkor Technology Singapore Holdings Pte. Ltd. (“ATSH”) entered into a $600.0 million senior revolving credit facility (the “2022 Singapore Revolver”), which is guaranteed by Amkor Technology, Inc., ATT and Amkor Advanced Technology, Inc. (“AATT”). The maximum borrowing capacity under the 2022 Singapore Revolver is limited to a base amount equal to the lesser of: (1) $600.0 million; and (2) $250.0 million plus a variable amount equal to 37.5% of our consolidated accounts receivable balance. As of March 31, 2023, $600.0 million was available for future borrowings under the 2022 Singapore Revolver.

Certain of our foreign debt is collateralized by the land, buildings, equipment and accounts receivable in the respective locations. As of March 31, 2023, the collateralized debt balance was $650.4 million, of which $365.2 million of assets were pledged as collateral.

The debt of Amkor Technology, Inc. is structurally subordinated in right of payment to all existing and future debt and other liabilities of our subsidiaries. From time to time, Amkor Technology, Inc., ATT, AATT, and ATSH guarantee certain debt of our subsidiaries. The agreements governing our indebtedness contain affirmative and negative covenants which restrict our ability to pay dividends and could restrict our operations. These restrictions are determined in part by calculations based upon cumulative net income and do not currently have a material impact on our ability to make dividend payments or stock repurchases.

We were in compliance with all debt covenants at March 31, 2023.

12. Pension Plans

Foreign Defined Benefit Pension Plans

Our subsidiaries in Japan, Korea, Malaysia, the Philippines and Taiwan sponsor defined benefit pension plans. Charges to expense are based upon actuarial analyses. The components of net periodic pension cost for these defined benefit pension plans are as follows:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Service cost	$	3,828	$	5,418
Interest cost	1,603		1,258
Expected return on plan assets	(1,311)		(1,493)

Recognized actuarial loss	(98)		13
Net periodic pension cost	$	4,022	$	5,196

The components of net periodic pension cost other than the service cost component are included in other (income) expense, net in our Consolidated Statements of Income.

Defined Contribution Pension Plans

We sponsor defined contribution pension plans in Korea, Malaysia, Taiwan and the U.S. The following table summarizes our defined contribution expense:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Defined contribution expense	$	8,796	$	7,948

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

13. Derivatives

We use foreign currency forward contracts to mitigate foreign currency risk of certain monetary assets and liabilities denominated in foreign currencies. We do not enter into such contracts for trading or speculative purposes. These derivative instruments are not designated as hedging instruments.

As of March 31, 2023 and December 31, 2022, our foreign exchange forward contracts consisted of the following:


	March 31, 2023					December 31, 2022
	Notional Value		Fair Value (Level 2)		Balance Sheet Location	Notional Value		Fair Value (Level 2)		Balance Sheet Location
	(In thousands)
Japanese yen	$	281,038	$	(2,665)	Accrued expenses	$	330,179	$	6,284	Other current assets
Korean won	75,954		(401)		Accrued expenses	65,927		333		Other current assets
Philippine peso	6,523		(21)		Accrued expenses	3,085		(6)		Accrued expenses
Singapore dollar	34,522		(46)		Accrued expenses	—		—		N/A
Taiwan dollar	25,855		(92)		Accrued expenses	28,763		(57)		Accrued expenses
Total forward contracts	$	423,892	$	(3,225)		$	427,954	$	6,554

For the three months ended March 31, 2023 and 2022, the derivatives resulted in a net loss of $12.0 million and $22.3 million, respectively, which were offset by the foreign currency gains associated with the underlying net liabilities.

14. Fair Value Measurements

The accounting framework for determining fair value includes a hierarchy for ranking the quality and reliability of the information used to measure fair value, which enables the reader of the financial statements to assess the inputs used to develop those measurements. The fair value hierarchy consists of three tiers as follows: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data. For our Level 2 short-term investments, we consider factors such as actual trade data, benchmark yields, broker/dealer quotes, and other similar data obtained from quoted market prices and independent pricing vendors to determine the fair value of these assets and liabilities.

The fair values of cash, accounts receivable, trade accounts payable, capital expenditures payable and certain other current assets and accrued expenses approximate carrying values because of their short-term nature. The carrying value of certain other non-current assets and liabilities approximates fair value. Our assets and liabilities recorded at fair value on a recurring basis include restricted cash money market funds and short-term investments, including investments classified as cash equivalents. Cash equivalent money market funds and restricted cash money market funds are invested in U.S. money market funds and various U.S. and foreign bank operating and time deposit accounts, which are due on demand or carry a maturity date of less than three months when purchased. No restrictions have been imposed on us regarding withdrawal of balances with respect to our cash equivalents as a result of liquidity or other credit market issues affecting the money market funds we invest in or the counterparty financial institutions holding our deposits.

Our derivative financial instruments are valued using quoted market prices for similar assets. Counterparties to these derivative contracts are highly rated financial institutions.

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AMKOR TECHNOLOGY, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

We also measure certain assets and liabilities, including property, plant and equipment and goodwill, at fair value on a nonrecurring basis.

We measure the fair value of our debt for disclosure purposes. The following table presents the fair value of our debt:


	March 31, 2023				December 31, 2022
	Fair Value		Carrying Value		Fair Value		Carrying Value
	(In thousands)
Senior notes (Level 1)	$	527,741	$	521,290	$	523,016	$	521,114
Revolving credit facilities and term loans (Level 2)	657,081		676,176		686,728		711,220
Total debt	$	1,184,822	$	1,197,466	$	1,209,744	$	1,232,334

The estimated fair value of our senior notes is based primarily on quoted market prices reported on or near the respective balance sheet dates. The estimated fair value of our revolving credit facilities and term loans is calculated using a discounted cash flow analysis, which utilizes market-based assumptions, including forward interest rates adjusted for credit risk.

15. Commitments and Contingencies

We generally warrant that our services will be performed in a professional and workmanlike manner and in compliance with our customers’ specifications. We accrue costs for known warranty issues. Historically, our warranty costs have been immaterial.

Legal Proceedings

We are involved in claims and legal proceedings and may become involved in other legal matters arising in the ordinary course of our business. We evaluate these claims and legal matters on a case-by-case basis to determine the impact, if any, on our business, liquidity, results of operations, financial condition or cash flows. Although the outcome of these matters is uncertain, we believe that the ultimate outcome of these claims and proceedings, individually and in the aggregate, will not have a material adverse impact to us. Our evaluation of the potential impact of these claims and legal proceedings on our business, liquidity, results of operations, financial condition or cash flows could change in the future.

In accordance with the accounting guidance for loss contingencies, including legal proceedings, lawsuits, pending claims and other legal matters, we accrue for a loss contingency when we conclude that the likelihood of a loss is probable and the amount of the loss can be reasonably estimated. We adjust our accruals from time to time as we receive additional information, but the loss we incur may be significantly greater than or less than the amount we have accrued. We disclose loss contingencies if we believe they are material and there is at least a reasonable possibility that a loss has been incurred. Attorney fees related to legal matters are expensed as incurred.

Lease Commitments

As of March 31, 2023 we have entered into additional lease agreements that have not yet commenced of approximately $10 million.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Overview

Amkor is one of the world’s leading providers of outsourced semiconductor packaging and test services. Our financial goal is profitable sales growth. To achieve this goal, we are focused on leveraging our leadership position in services for advanced technologies, providing our customers with a geographically diverse manufacturing footprint, growing within the industry secular growth markets of 5G, automotive, Internet-of-Things (“IoT”) and high-performance computing (“HPC”), optimizing utilization of existing assets, and selectively growing our scale and scope through strategic investments.

We are an industry leader in developing and commercializing advanced packaging and test technologies, which we believe provide substantial value to our customers. Advanced packages, which account for a significant portion of mobile phone semiconductor value, are the preferred choice in the high-end smartphone market. The use of advanced packages in automotive applications is also growing, largely due to new, data-intensive applications which require increased pin count and performance. In consumer devices, further miniaturization and the integration of new functionality within IoT devices also require advanced packaging. With the continuing trend towards cloud-based computing, innovative advanced packaging solutions are needed to achieve the increased speed, performance and power consumption requirements for this market. We believe that demand for advanced packaging services will continue to grow as our customers and leading electronics OEMs strive for smaller device geometries, higher levels of integration and performance and lower power consumption. We intend to continue to leverage our investments in advanced technology to meet the demand for these services in high growth markets.

Our broad geographic footprint, including our manufacturing presence in Portugal and our headquarters in the United States, are key differentiators for us and position us to continue to support global supply chains and to participate in initiatives to regionalize supply chains. We are making preparations to deliver advanced system-in-package (“SiP”) modules and other packaging solutions from the Vietnam Facility. We believe that the Vietnam Facility, which is expected to begin production in the fourth quarter of 2023, will provide customers with a cost-competitive high-volume manufacturing location that offers additional supply chain diversification.

Another key factor in our success is the optimization of asset utilization. We build and utilize manufacturing lines which support multiple customers, and we increase factory utilization through sophisticated planning processes and intensive efficiency improvement activities.

From time to time, we identify attractive opportunities to strengthen our leadership position and market share through expansion of our operations, joint ventures, acquisitions and other strategic investments. We believe that selective growth through these strategic actions can further strengthen customer relationships, help to maintain and enhance our technological leadership, diversify our revenue streams and improve our profits.

As a supplier in the semiconductor industry, our business is cyclical and impacted by broad economic factors. Historical trends indicate there has been a strong correlation between worldwide gross domestic product levels, consumer spending and semiconductor industry cycles. We believe that the general semiconductor market is currently going through a cyclical correction. The semiconductor industry has experienced significant and sometimes prolonged cyclical upturns and downturns in the past. We cannot predict the timing, strength or duration of any correction, economic slowdown, recession or subsequent economic recovery.

National, regional and local governments have implemented, and may implement in the future, restrictions to mitigate the spread of Covid-19, the emergence of new variants or the re-emergence of Covid-19 in jurisdictions in which we, our customers and our suppliers operate, and such restrictions may materially and adversely impact our operations and the operations of our customers and suppliers. We also remain subject to industry-wide supply constraints and inflationary price pressures, which have resulted in long lead times, rising prices and supply chain disruptions. For additional information regarding the potential impact of macroeconomic factors, the Covid-19 pandemic and other risks on our business, results of operations and financial condition, please refer to the “Risk Factors” section in Part II, Item 1A.

We operate in a capital-intensive industry. Servicing our current and future customers requires that we incur significant operating expenses and continue to make significant capital expenditures, which are generally made in advance of the

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related revenues and without firm customer commitments. We fund our operations, including capital expenditures and debt service requirements, with cash flows from operations, existing cash and cash equivalents, short-term investments, borrowings under available credit facilities and proceeds from any additional financing. Maintaining an appropriate level of liquidity is important to our business and depends on, among other considerations, the performance of our business, our capital expenditure levels, our ability to repay debt out of our operating cash flows or proceeds from debt or equity financings and our investment strategy. As of March 31, 2023, we had cash and cash equivalents and short-term investments of $909.8 million and $341.8 million, respectively.

Our net sales, gross profit, operating income, cash flows, liquidity and capital resources have historically fluctuated significantly from quarter to quarter due to many factors, including the seasonality of our business, the cyclical nature of the semiconductor industry and other factors discussed in the “Risk Factors” section in Part II, Item 1A of this Form 10-Q. We expect macroeconomic conditions to be challenging in 2023. To prepare for future growth, we will continue to make prudent investments, including investments in the Vietnam Facility, and we will closely manage other capacity expansion and control costs in response to changes in market conditions.

Financial Summary

Our net sales decreased $125.3 million, or 7.8%, to $1,471.5 million for the three months ended March 31, 2023, compared to $1,596.8 million for the three months ended March 31, 2022. The decrease was primarily due to lower sales in our consumer and computing end markets, partially offset by continued strength in the automotive and industrial end market.

Gross margin for the three months ended March 31, 2023 decreased to 13.2%, compared to 20.4% for the three months ended March 31, 2022. The decrease in gross margin was primarily due to an increase in the mix of products sold with higher material content, the decrease in net sales and lower factory utilization, partially offset by net favorable foreign currency exchange rate movements.

Operating income margin decreased 850 basis points to 4.7% for the three months ended March 31, 2023 from 13.2% for the three months ended March 31, 2022. The decrease in our operating income margin was primarily due to the decrease in our gross margin discussed above along with an increase in research and development expenses due to additional equipment and overhead costs to support development projects in advanced packaging technologies, partially offset by projects that moved into production.

Our capital expenditures totaled $98.2 million for the three months ended March 31, 2023, compared to $158.2 million for the three months ended March 31, 2022. Our spending was primarily focused on investments in advanced packaging and test equipment and the Vietnam Facility.

Net cash provided by operating activities was $175.7 million for the three months ended March 31, 2023, compared to $166.2 million for the three months ended March 31, 2022. This increase was primarily due to changes in working capital, deposits and advanced payments to our vendors, offset by lower net sales and operating profits.

Results of Operations

The following table sets forth certain operating data as a percentage of net sales for the periods indicated:


	For the Three Months Ended March 31,
	2023		2022
Net sales	100.0	%	100.0	%
Materials	52.9	%	46.7	%
Labor	11.3	%	11.5	%
Other manufacturing costs	22.6	%	21.4	%
Gross margin	13.2	%	20.4	%
Operating income	4.7	%	13.2	%
Net income attributable to Amkor	3.1	%	10.7	%

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Net Sales


	For the Three Months Ended March 31,
	2023		2022		Change
	(In thousands, except percentages)
Net sales	$	1,471,539	$	1,596,816	$	(125,277)	(7.8)	%

The decrease in net sales for the three months ended March 31, 2023 compared to the three months ended March 31, 2022 was primarily due to lower sales in our consumer and computing end markets, partially offset by continued strength in the automotive and industrial end market. Our consumer and computing end markets decreased 43% and 17% compared to 2022, respectively, mainly due to a cyclical correction in the semiconductor market. These decreases were partially offset by 14% growth in our automotive and industrial end market compared to 2022, driven by increases in advanced packaging and in silicon content in vehicles. In addition, communications, our largest end market, increased by 2% compared to 2022.

Gross Profit and Gross Margin


	For the Three Months Ended March 31,
	2023			2022			Change
	(In thousands, except percentages)
Gross profit	$	194,421		$	325,330		$	(130,909)
Gross margin	13.2		%	20.4		%	(7.2)		%

Our cost of sales consists principally of materials, labor, depreciation and manufacturing overhead. Since a substantial portion of the costs at our factories is fixed, there tends to be a strong relationship between our revenue levels and gross margin. Accordingly, relatively modest increases or decreases in revenue can have a significant effect on margin and on labor and other manufacturing costs as a percentage of revenue, depending on product mix, utilization, foreign currency exchange rate movements and seasonality. We have expanded our business in packages which tend to have higher material costs than our other products. As we continue to increase production of these higher material cost products, there could be an impact on our profitability, depending on overall utilization.

Gross profit and gross margin decreased for the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to an increase in the mix of products sold with higher material content, the decrease in net sales and lower factory utilization, partially offset by net favorable foreign currency exchange rate movements.

Selling, General and Administrative


	For the Three Months Ended March 31,
	2023		2022		Change
	(In thousands, except percentages)
Selling, general and administrative	$	78,671	$	76,959	$	1,712	2.2	%

Selling, general and administrative expenses increased for the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to an increase in software maintenance costs.

Research and Development


	For the Three Months Ended March 31,
	2023		2022		Change
	(In thousands, except percentages)
Research and development	$	47,047	$	38,363	$	8,684	22.6	%

Research and development activities are focused on developing new packaging and test services and improving the efficiency and capabilities of our existing production processes. The costs related to our technology and product development projects are included in research and development expense until the project moves into production. Once production begins, the costs relating to production become part of the cost of sales, including ongoing depreciation for the equipment previously held for research and development activities.

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Research and development expenses for the three months ended March 31, 2023 increased compared to the three months ended March 31, 2022 due to additional equipment and overhead costs to support development projects in advanced packaging technologies, partially offset by projects that moved into production.

Other Income and Expense


	For the Three Months Ended March 31,
	2023		2022		Change
	(In thousands, except percentages)
Interest expense	$	16,167	$	14,148	$	2,019	14.3	%
Interest income	(10,433)		(603)		(9,830)		>100%
Foreign currency loss (gain), net	6,763		(4,301)		11,064		>(100)%
Loss on debt retirement	—		97		(97)		(100.0)	%
Other	118		(289)		407		>(100)%
Total other expense, net	$	12,615	$	9,052	$	3,563	39.4	%

Interest expense increased for the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to additional borrowings in China during 2022.

Interest income increased for the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to higher interest rates on our cash and cash equivalents and available-for-sale debt investment balances.

The changes in foreign currency (gain) loss, net for the three months ended March 31, 2023 compared to the three months ended March 31, 2022 were primarily due to the strengthening of the U.S. dollar in the prior year compared to the foreign currencies of our subsidiaries, mainly the Japanese yen, and the associated impact on our net monetary exposure. In addition, the current year loss includes higher costs associated with our derivative instruments, which are used to reduce our exposure to foreign currency gains and losses.

Income Tax Expense


	For the Three Months Ended March 31,
	2023		2022		Change
	(In thousands)
Income tax expense	$	10,864	$	29,728	$	(18,864)

Income tax expense, which includes foreign withholding taxes and minimum taxes, reflects the applicable tax rates in effect in the various countries where our income is earned and is subject to volatility depending on the relative mix of earnings in each location. Income tax expense decreased for the three months ended March 31, 2023 compared to the three months ended March 31, 2022, primarily due to the decrease of income before tax.

During the three months ended March 31, 2023 and 2022, our subsidiaries in Korea and Singapore operated under various conditional reduced tax rates. As these conditional reduced tax rates expire, income earned in these jurisdictions will be subject to higher statutory income tax rates, which may cause our effective tax rate to increase.

Liquidity

We assess our liquidity based on our current expectations regarding sales and operating expenses, capital spending, dividend payments, stock and debt repurchases, debt service requirements and other funding needs. Based on this assessment, we believe that our cash flow from operating activities, together with existing cash and cash equivalents, short-term investments and availability under our credit facilities, will be sufficient to fund our working capital, capital expenditures, dividend payments, debt service, debt repurchases and other financial requirements for at least the next twelve months.

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Our liquidity is affected by, among other factors, volatility in the global economy and credit markets, the performance of our business, our capital expenditure levels, other uses of our cash including any dividends and purchases of stock or debt under any repurchase program, any acquisitions, joint ventures or other investments and our ability to either repay debt out of operating cash flow or refinance it at or prior to maturity with the proceeds from debt or equity offerings. There can be no assurance that we will generate the necessary net income or operating cash flows, or be able to borrow sufficient funds, to meet the funding needs of our business beyond the next twelve months due to a variety of factors, including the cyclical nature of the semiconductor industry and other factors discussed in Part II, Item 1A of this Form 10-Q.

Our primary source of cash and the source of funds for our operations are cash flows from operations, current cash and cash equivalents, short-term investments, borrowings under available credit facilities and proceeds from any additional debt or equity financings. Please refer to Note 7 and Note 11 to our Consolidated Financial Statements in Part 1, Item 1 of this Form 10-Q for additional information on our investments and borrowings, respectively.

As of March 31, 2023, we had cash and cash equivalents and short-term investments of $1,251.6 million. Included in our cash and short-term investments balances as of March 31, 2023 is $1,116.2 million held offshore by our foreign subsidiaries. We have the ability to access cash held offshore by our foreign subsidiaries primarily through the repayment of intercompany debt obligations. If we were to distribute this offshore cash to the U.S. as dividends from our foreign subsidiaries, the dividends generally would not be subject to U.S. federal income tax, but the distributions may be subject to foreign withholding and state income taxes.

As of March 31, 2023, our net liability associated with unrecognized tax benefits is $30.5 million. Due to the uncertainty regarding the amount and timing of any future cash outflows associated with our unrecognized tax benefits, we are unable to reasonably estimate the amount and period of ultimate settlement, if any, with the various taxing authorities.

For certain accounts receivable, we use non-recourse factoring arrangements with third party financial institutions to manage our working capital and cash flows. Under these arrangements, we sell receivables to a financial institution for cash at a discount to the face amount. Available capacity under these arrangements is dependent on the level of our trade accounts receivable eligible to be sold, the financial institutions’ willingness to purchase such receivables and the limits provided by the financial institutions. These factoring arrangements can be reduced or eliminated at any time due to market conditions and changes in the creditworthiness of customers. For the three months ended March 31, 2023 and 2022, we sold accounts receivable totaling $78.0 million and $92.2 million, net of discounts and fees of $0.2 million for each period.

We operate in a capital-intensive industry. Servicing our current and future customers may require that we incur significant operating expenses and make significant investments in equipment and facilities, which are generally made in advance of the related revenues and without firm customer commitments.

The maximum borrowing capacity under the 2022 Singapore Revolver is limited to a base amount equal to the lesser of: (1) $600.0 million; or (2) $250 million plus a variable amount equal to 37.5% of our consolidated accounts receivable balance. As of March 31, 2023, we had availability of $600.0 million. As of March 31, 2023, our foreign subsidiaries had $615.0 million available for future borrowings under revolving credit facilities, including the 2022 Singapore Revolver, and $67.3 million available to be borrowed under term loan credit facilities for working capital purposes and capital expenditures. For additional information regarding the 2022 Singapore Revolver, please refer to Note 11 to our Consolidated Financial Statements in Part 1, Item 1 of this Form 10-Q.

As of March 31, 2023, we had debt of $1,197.5 million, with $137.5 million payable within 12 months. As of March 31, 2023, the interest payment obligations, based on stated coupon rates for fixed rate debt and interest rates applicable at March 31, 2023 for variable rate debt, were $200.0 million during the remaining term of the debt. Interest payment obligations payable within 12 months is $51.4 million. We were in compliance with all debt covenants as of March 31, 2023, and we expect to remain in compliance with these covenants for at least the next twelve months. For additional information regarding our debt arrangements, please refer to Note 11 to our Consolidated Financial Statements in Part 1, Item 1 of this Form 10-Q.

Certain of our debt agreements have restrictions on dividend payments and the repurchase of stock and subordinated securities. These restrictions are determined in part by our covenant compliance and on calculations based upon

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cumulative net income and do not currently have a material impact on our ability to make dividend payments or stock repurchases.

In order to reduce our debt and future cash interest payments, we may from time to time repurchase or redeem our outstanding senior notes for cash or exchange shares of our common stock for our outstanding senior notes. Any such transaction may be made in the open market, through privately negotiated transactions or otherwise and would be subject to the terms of our indentures and other debt agreements, market conditions and other factors.

Our subsidiary in Korea maintains an unfunded severance plan that covers certain employees who were employed prior to August 1, 2015. As of March 31, 2023, the severance liability was $53.1 million, with $7.1 million payable within 12 months. Accrued severance benefits are estimated assuming all eligible employees were to terminate their employment at the balance sheet date. For service periods subsequent to August 1, 2015, employees participate in either a defined benefit pension plan or a defined contribution pension plan. From time to time, we may offer employees the option to convert from the severance plan to the defined contribution plan, which would require us to fund the converted portion of the liability. In addition, as of March 31, 2023, we had foreign pension plan obligations of $45.3 million, for which the timing and actual amount of impact on our future cash flow is uncertain. For additional information regarding our pension and severance plans, please refer to Note 12 to our Consolidated Financial Statements in Part 1, Item 1 of this Form 10-Q and in Note 12 to the 2022 Form 10-K.

We lease certain machinery and equipment, office space and manufacturing facilities. As of March 31, 2023, our total remaining operating lease obligations and finance lease obligations were $139.7 million and $122.2 million, respectively, with $68.4 million and $64.8 million payable within 12 months, respectively. The lease obligations represent our future minimum lease payments including interest payments.

We had off-balance sheet purchase obligations for capital expenditures, long-term supply contracts and other contractual commitments. As of March 31, 2023, the purchase obligations were $410.8 million, with $400.4 million payable within 12 months.

Capital Returns

During the three months ended March 31, 2023, we paid total quarterly cash dividends of $18.4 million, and we currently anticipate that we will continue to pay quarterly cash dividends in the future. However, the payment, amount and timing of future dividends remain within the discretion of our Board of Directors and will depend upon our results of operations, financial condition, cash requirements, debt restrictions and other factors.

Our Board of Directors previously adopted a stock repurchase program (the “Stock Repurchase Program”) authorizing the repurchase of up to $300.0 million of our common stock, exclusive of any fees, commissions or other expenses. Under the Stock Repurchase Program, the purchase of stock may be made in the open market or through privately negotiated transactions. The timing, manner, price and amount of any repurchases will be determined by us at our discretion and will depend upon a variety of factors including economic and market conditions, the cash needs and investment opportunities for the business, the current market price of our stock, applicable legal requirements and other factors. We have not purchased any stock under the Stock Repurchase Program since 2012. At March 31, 2023, approximately $91.6 million was available to repurchase common stock pursuant to the Stock Repurchase Program.

Capital Resources

We make significant capital expenditures in order to service the demand of our customers, which are primarily focused on investments in advanced packaging and test equipment and the Vietnam Facility. During the three months ended March 31, 2023, our capital expenditures totaled $98.2 million.

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We expect that our 2023 capital expenditures will be approximately $800 million. Ultimately, the amount of our 2023 capital expenditures will depend on several factors including, among others, the timing and implementation of any capital projects under review, the performance of our business, economic and market conditions, the cash needs and investment opportunities for the business, the need for additional capacity to service anticipated customer demand, equipment lead times and the availability of cash flows from operations or financing. The primary sources of funds for our capital expenditures are cash flows from operations, current cash and cash equivalents, short-term investments, borrowings under available credit facilities and proceeds from any additional debt or equity financings. Please refer to Note 7 and Note 11 to our Consolidated Financial Statements in Part 1, Item 1 of this Form 10-Q for additional information on our investments and borrowings, respectively.

In addition, we are subject to risks associated with our capital expenditures, including those discussed in the “Risk Factors” section in Part II, Item 1A of this Form 10-Q under the caption “We make substantial investments in equipment and facilities to support the demand of our customers, which may materially and adversely affect our business if the demand of our customers does not develop as we expect or is adversely affected.”

Cash Flows

Net cash provided by (used in) operating, investing and financing activities for the three months ended March 31, 2023 and 2022, was as follows:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Operating activities	$	175,746	$	166,178
Investing activities	(155,704)		(240,009)
Financing activities	(66,206)		109,236

Operating activities: Our cash flow provided by operating activities for the three months ended March 31, 2023 increased by $9.6 million compared to the three months ended March 31, 2022, primarily due to changes in working capital, deposits and advanced payments to our vendors, offset by lower net sales and operating profits.

Investing activities: Our cash flow used in investing activities for the three months ended March 31, 2023 decreased by $84.3 million compared to the three months ended March 31, 2022, primarily due to decreased payments related to property, plant and equipment and decreased net payments for foreign exchange forward contracts. Payments for property, plant and equipment can fluctuate based on the timing of purchase, receipt and acceptance of equipment.

Financing activities: The net cash used in financing activities for the three months ended March 31, 2023 was primarily due to net debt repayments in Japan, the payment of our quarterly dividends and finance lease obligations. The net cash provided by financing activities for the three months ended March 31, 2022 was primarily due to a borrowing in Korea, offset by net debt repayments in Japan and the payment of our quarterly dividends.

We provide the following supplemental data to assist our investors and analysts in understanding our liquidity and capital resources. We define “free cash flow” as net cash provided by operating activities less payments for property, plant and equipment, plus proceeds from the sale of and insurance recovery for property, plant and equipment, if applicable. Free cash flow is not defined by U.S. GAAP. We believe free cash flow to be relevant and useful information to our investors because it provides them with additional information in assessing our liquidity, capital resources and financial operating results. Our management uses free cash flow in evaluating our liquidity, our ability to service debt, our ability to fund capital expenditures and our ability to pay dividends and the amount of dividends to be paid. However, free cash flow has certain limitations, including that it does not represent the residual cash flow available for discretionary expenditures since other, non-discretionary expenditures, such as mandatory debt service, are not deducted from the measure. The amount of mandatory versus discretionary expenditures can vary significantly between periods. This measure should be considered in addition to, and not as a substitute for, or superior to, other measures of liquidity or financial performance prepared in accordance with U.S. GAAP, such as net cash provided by operating activities. Furthermore, our definition of free cash flow may not be comparable to similarly titled measures reported by other companies.

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	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Net cash provided by operating activities	$	175,746	$	166,178
Payments for property, plant and equipment	(98,224)		(158,154)
Proceeds from sale of property, plant and equipment	652		416
Free cash flow	$	78,174	$	8,440

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Market Risk Sensitivity

We are exposed to market risks, primarily related to foreign currency and interest rate fluctuations. In the normal course of business, we employ established policies and procedures to manage the exposure to fluctuations in foreign currency values and changes in interest rates.

Foreign Currency Risk

The U.S. dollar is our reporting and functional currency for our subsidiaries, except for our Japan operations, where the Japanese yen is the functional currency. In order to reduce our exposure to foreign currency gains and losses, we use natural hedging techniques and forward contracts to mitigate foreign currency risk.

We have foreign currency exchange rate risk associated with the remeasurement of monetary assets and liabilities on our Consolidated Balance Sheets that are denominated in currencies other than the functional currency. We performed a sensitivity analysis of our foreign currency exposure as of March 31, 2023 to assess the potential impact of fluctuations in exchange rates for all foreign denominated assets and liabilities. Assuming that all foreign currencies appreciated 10% against the U.S. dollar and taking into account our foreign currency forward contracts, our income before taxes for the three months ended March 31, 2023 would have been approximately $9 million lower, due to the remeasurement of monetary assets and liabilities.

In addition, we have foreign currency exchange rate exposure on our results of operations. For the three months ended March 31, 2023, approximately 85% of our net sales were denominated in U.S. dollars. Our remaining net sales were principally denominated in Japanese yen. For the three months ended March 31, 2023, approximately 55% of our cost of sales and operating expenses were denominated in U.S. dollars and were largely for raw materials and costs associated with property, plant and equipment. The remaining portion of our cost of sales and operating expenses was principally denominated in the Asian currencies where our production facilities are located and largely consisted of labor. To the extent that the U.S. dollar weakens against these Asian-based currencies, similar foreign currency denominated income and expenses in the future will result in higher sales, higher cost of sales and operating expenses, with cost of sales and operating expenses having the greater impact on our financial results. Similarly, our sales, cost of sales and operating expenses will decrease if the U.S. dollar strengthens against these foreign currencies. We performed a sensitivity analysis of our foreign currency exposure as of March 31, 2023 to assess the potential impact of fluctuations in exchange rates for all foreign denominated sales and operating expenses. Assuming that all foreign currencies appreciated 10% against the U.S. dollar, our operating income for the three months ended March 31, 2023 would have been approximately $35 million lower.

There are inherent limitations in the sensitivity analysis presented, primarily the assumption that foreign exchange rate movements across multiple jurisdictions would change instantaneously in an equal fashion. As a result, the analysis is unable to reflect the potential effects of more complex market or other changes that could arise which may positively or negatively affect our results of operations.

Our Consolidated Financial Statements are impacted by changes in exchange rates at the entity where the local currency is the functional currency. The effect of foreign exchange rate translation for these entities was a loss of $2.1 million and $8.4 million for the three months ended March 31, 2023 and 2022, respectively, and was recognized as an adjustment to equity through other comprehensive income (loss).

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Interest Rate Risk

We have interest rate risk with respect to our available-for-sale debt investments. Our investment portfolio consists of various security types and maturities, with our portfolio primarily having maturities of one year or less. Our primary objective with our investment portfolio is to invest available cash while preserving capital and meeting liquidity needs. These securities are subject to interest rate risk and will decrease in value if market interest rates increase. Due to the relatively short-term nature of our investment portfolio, we believe that an immediate increase in interest rates will not have a material impact on the fair value of our available-for-sale debt investments. For information regarding our available-for-sale debt investments, see Note 7 to our Consolidated Financial Statements in Part I, Item 1 of this Form 10-Q.

In addition, we have interest rate risk with respect to our debt. Our fixed and variable rate debt includes foreign borrowings, revolving credit facilities and senior notes. Changes in interest rates have different impacts on the fixed and variable rate portions of our debt portfolio. A change in interest rates on the fixed portion of the debt portfolio impacts the fair value of the debt instrument but has no impact on interest expense or cash flows. A change in interest rates on the variable portion of the debt portfolio impacts the interest incurred and cash flows but will not have a material impact on the fair value of the instrument.

The table below presents the interest rates, maturities and fair value of our fixed and variable rate debt as of March 31, 2023:


	2023 - Remaining			2024			2025			2026			2027			Thereafter			Total			Fair Value
	($ in thousands)
Fixed rate debt	$	96,568		$	102,664		$	109,762		$	93,354		$	598,634		$	50,000		$	1,050,982		$	1,032,422
Average interest rate	1.3		%	1.4		%	1.7		%	1.8		%	6.1		%	2.1		%	4.1		%
Variable rate debt	$	14,735		$	48,000		$	90,500		$	—		$	—		$	—		$	153,235		$	152,400
Average interest rate	2.4		%	6.2		%	5.8		%	—		%	—		%	—		%	5.6		%
Total debt maturities	$	111,303		$	150,664		$	200,262		$	93,354		$	598,634		$	50,000		$	1,204,217		$	1,184,822

For information regarding the fair value of our long-term debt, see Note 14 to our Consolidated Financial Statements in Part I, Item 1 of this Form 10-Q.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our periodic reports to the SEC is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure, based on the definition of “disclosure controls and procedures” in Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). In designing and evaluating the disclosure controls and procedures, management recognizes that any disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily is required to apply its judgment in evaluating the cost-benefit relationship of possible disclosure controls and procedures.

We carried out an evaluation, under the supervision and with the participation of management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2023 and concluded those disclosure controls and procedures were effective as of that date.

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Changes in Internal Control Over Financial Reporting

We carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of changes to our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that occurred during the quarter ended March 31, 2023. There have been no changes in our internal control over financial reporting that occurred during the three months ended March 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

Information about legal proceedings is set forth in Note 15 to our Consolidated Financial Statements in Part I, Item 1 of this Form 10-Q and in Note 17 to the 2022 Form 10-K.

Item 1A. Risk Factors

The factors discussed below are cautionary statements that identify important factors and risks that could cause actual results to differ materially from those anticipated by the forward-looking statements contained in this Form 10-Q. For more information, see the Forward-Looking Statements within this Form 10-Q. You should carefully consider the risks and uncertainties described below, together with all of the other information included in this Form 10-Q, in considering our business and prospects. The risks and uncertainties described below are not the only ones facing Amkor. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also adversely affect our business operations. The occurrence of any of the risks and uncertainties described below could materially and adversely affect our business, liquidity, results of operations, financial condition or cash flows.

Summary of Risk Factors

An investment in our common stock involves various risks, and you are urged to carefully consider all of the matters discussed in Part II, Item 1A of this Form 10-Q under the caption “Risk Factors” (in addition to those discussed under this “Summary of Risk Factors” section) in considering our business and prospects. The following is a list of some of these risks:

Company-Specific Risk Factors

•dependence on the cyclical and volatile semiconductor industry and vulnerability to industry downturns and declines in global economic and financial conditions;

•changes in costs, quality, availability and delivery times of raw materials, components and equipment;

•fluctuations in operating results and cash flows;

•dependence on international factories and operations, and risks relating to trade restrictions and regional conflict;

•competition with established competitors in the packaging and test business, the internal capabilities of integrated device manufacturers (“IDMs”), and new competitors, including foundries;

•our substantial investments in equipment and facilities to support the demand of our customers;

•difficulty achieving the relatively high-capacity utilization rates necessary to realize satisfactory gross margins given our high percentage of fixed costs;

•our absence of backlog and the short-term nature of our customers’ commitments;

•the historical downward pressure on the prices of our packaging and test services;

•fluctuations in our manufacturing yields;

•our ability to develop new proprietary technology, protect our proprietary technology, operate without infringing the proprietary rights of others, and implement new technologies;

•warranty claims, product return and liability risks, and the risk of negative publicity if our products fail, as well as the risk of litigation incident to our business;

•restrictive covenants in the indentures and agreements governing our current and future indebtedness;

•the possibility that we may decrease or suspend our quarterly dividend;

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•significant severance plan obligations associated with our manufacturing operations in Korea; and

•the ability of certain of our stockholders to effectively determine or substantially influence the outcome of matters requiring stockholder approval.

General Risk Factors

•dependence on key customers or concentration of customers in certain end markets, such as mobile communications and automotive;

•health conditions or pandemics, such as the Covid-19 pandemic, impacting labor availability and operating capacity, capital availability, the supply chain and consumer demand for our customers’ products and services;

•our substantial indebtedness;

•fluctuations in interest rates and changes in credit risk;

•difficulty funding our liquidity needs;

•difficulty attracting, retaining or replacing qualified personnel;

•maintaining an effective system of internal controls;

•our continuing development and implementation of changes to, and maintenance and security of, our information technology systems;

•challenges with integrating diverse operations;

•any changes in tax laws, taxing authorities not agreeing with our interpretation of applicable tax laws, including whether we continue to qualify for conditional reduced tax rates, or any requirements to establish or adjust valuation allowances on deferred tax assets;

•environmental, health and safety liabilities and expenditures; and

•natural disasters and other calamities, health conditions or pandemics, political instability, hostilities or other disruptions.

Company-Specific Risk Factors

Our packaging and test services are used in volatile industries, and industry downturns and declines in global economic and financial conditions could harm our performance.

Our business is impacted by market conditions in the semiconductor industry, which is cyclical by nature and impacted by broad economic factors, such as worldwide gross domestic product and consumer spending. We believe that the general semiconductor market is currently going through a cyclical correction. The semiconductor industry has experienced significant and sometimes sudden and prolonged downturns in the past. If the industry or markets in which we compete experience slower, or even negative growth, our business and results of operations may be materially and adversely affected.

Since our business is, and will continue to be, dependent on the requirements of semiconductor companies for outsourced packaging and test services, any downturn in the semiconductor industry or any other industry that uses a significant number of semiconductor devices, such as telecommunications, automotive, consumer electronics, or computing, could have a material adverse effect on our business and operating results. During downturns, we have experienced, among other things, reduced demand, excess capacity and reduced sales. For example, the Covid-19 pandemic disrupted demand in the automotive and industrial end market in 2020, and during 2019, there was weakness in the general market and an inventory correction in the smartphone market.

In addition, declines in global economic and financial conditions have harmed our business in the past, and future global downturns could materially and adversely affect our business. New variants or the potential re-emergence of the Covid-19 pandemic or the occurrence of other epidemics or pandemics, and the imposition of related public health

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measures and travel and business restrictions, may materially and adversely impact our business, financial condition, operating results and cash flows. For example, as part of a broad effort to mitigate a rising number of Covid-19 cases in Shanghai, the Chinese government mandated a lockdown of our Shanghai factory from March 2022 to June 2022. Other national, regional, and local governments have implemented, and may implement in the future, public health measures in jurisdictions in which we, our customers and our suppliers operate, and such restrictions may materially and adversely impact our operations and the operations of our customers and suppliers. We also remain subject to industry-wide supply constraints and inflationary price pressures, which have resulted in long lead times, rising prices and supply chain disruptions.

It is difficult to predict the timing, strength or duration of any economic disruption caused by the Covid-19 pandemic or which end markets will experience a slowdown or subsequent economic recovery which, in turn, makes it more challenging for us to forecast our operating results, make business decisions and identify risks that may materially affect our business, sources and uses of cash, financial condition and results of operations. Additionally, if industry conditions deteriorate, we could suffer significant losses, as we have in the past, that could materially and adversely impact our business, liquidity, results of operations, financial condition and cash flows.

Our business may suffer if the cost, quality or supply of materials or equipment changes adversely.

We obtain the materials and equipment required for the packaging and test services performed by our factories from various vendors. We source most of our materials, including critical materials such as leadframes, laminate substrates and gold wire, from a limited group of suppliers. A disruption to the operations of one or more of our suppliers could extend lead times for materials and equipment and have a negative impact on our business. For example, the Covid-19 pandemic and resulting supply chain disruptions and economic turbulence created extended lead times for some materials and equipment. To the extent the impact of such disruptive events continues or worsens, we anticipate having greater difficulty obtaining, or waiting longer to obtain, certain equipment, supplies and other materials necessary for performance of our services or necessary to increase the services we provide to customers. Furthermore, fire, severe weather, earthquakes, flooding and tsunamis in the past have impacted the supply of specialty chemicals, substrates, silicon wafers, equipment and other supplies to the electronics industry.

In addition, we purchase the majority of our materials on a purchase order basis. Our business may be harmed if we cannot obtain materials and other supplies from our vendors in a timely manner, in sufficient quantities, at acceptable quality or at competitive prices or are unable to increase our prices sufficiently to recover inflationary price increases in materials or supplies. Some of our customers are also dependent on a limited number of suppliers for certain materials and silicon wafers. Shortages or disruptions in our customers’ supply channels, including any disruptions arising out of the conflict in Ukraine, could have a material adverse effect on our business, financial condition, results of operations and cash flows.

SEC rules and related industry initiatives require diligence and disclosure regarding the use of certain minerals originating from the conflict zones of the Democratic Republic of Congo and adjoining countries. Many of our customers’ initiatives require us to certify that the covered materials we use in our packages do not come from the conflict areas. We incur costs associated with complying with these requirements and customer initiatives, and we may be required to increase our efforts in the future to cover additional materials and geographic areas. These requirements and customer initiatives could affect the pricing, sourcing and availability of materials used in the manufacture of semiconductor devices, and we cannot assure you that we will be able to obtain conflict-free materials or other materials covered by customer initiatives in sufficient quantities and at competitive prices or that we will be able to verify the origin of all of the materials we procure. If we are unable to meet these requirements and customer initiatives, some customers may move their business to other suppliers, and our reputation and business could be materially and adversely affected.

We purchase new packaging and test equipment to maintain and expand our operations. From time to time, increased demand for new equipment may cause lead times to extend beyond those normally required by equipment vendors, and the Covid-19 pandemic and resulting supply chain disruptions and economic turbulence created extended lead times for some equipment. In periods of increased demand and reduced availability, equipment suppliers may delay orders or only partially satisfy our equipment orders in the normal time frame. The unavailability of equipment or failures to deliver equipment on a timely basis could delay or impair our ability to meet customer orders. If we are unable to meet customer orders, we could lose potential and existing customers. Generally, we acquire our equipment on a purchase order basis and do not enter into long-term equipment agreements. As a result, we could experience adverse changes in

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pricing, currency risk and potential shortages in equipment in a strong market, any of which could have a material adverse effect on our results of operations.

We are a large buyer of gold and other commodity materials, including substrates and copper. The prices of gold and other commodities used in our business fluctuate. Historically, we have been able to partially offset the effect of commodity price increases through price adjustments to some customers and changes in our product designs that reduce the material content and cost, such as the use of shorter, thinner gold wire and migration to copper wire. However, we typically do not have long-term contracts that permit us to impose price adjustments, and market conditions may limit our ability to do so. Significant price increases may materially and adversely impact our gross margin in future periods to the extent we are unable to pass along past or future commodity price increases to our customers.

Our operating results and cash flows have varied and may vary significantly as a result of factors that we cannot control.

Many factors could have a material adverse effect on our net sales, gross profit, operating results and cash flows or lead to significant variability of quarterly or annual operating results. Our profitability and ability to generate cash from operations is principally dependent upon demand for semiconductors, the utilization of our capacity, semiconductor package mix, the average selling price of our services, our ability to manage our capital expenditures and our ability to control our costs including labor, material, overhead and financing costs.

Our net sales, gross margin, gross profit, operating income, net income and cash flows have historically fluctuated significantly from quarter to quarter as a result of many of the following factors, over which we have little or no control and which we expect to continue to impact our business:

•fluctuations in demand for semiconductors and conditions in the semiconductor industry generally, as well as by specific customers, such as inventory reductions by our customers impacting demand in key markets;

•changes in cost, quality, availability and delivery times of raw materials, components, equipment and labor;

•inflation, including wage inflation, and fluctuations in commodity prices, including gold, copper and other precious metals;

•our ability to achieve our major growth objectives, including transitioning second-wave customers to advanced packages and increasing our share of the automotive and industrial end market;

•changes in our capacity and capacity utilization rates;

•fluctuations in interest rates and currency exchange rates, including the current rising interest rate environment;

•changes in average selling prices which can occur quickly due to the absence of long-term agreements on price;

•changes in the mix of the semiconductor packaging and test services that we sell;

•fluctuations in our manufacturing yields;

•the development, transition and ramp to high volume manufacture of more advanced silicon nodes and evolving wafer, packaging and test technologies may cause production delays, lower manufacturing yields and supply constraints for new wafers and other materials;

•the absence of backlog, the short-term nature of our customers’ commitments, double bookings by customers and deterioration in customer forecasts and the impact of these factors, including the possible delay, rescheduling and cancellation of large orders, or the timing and volume of orders relative to our production capacity;

•the timing of expenditures in anticipation of future orders;

•changes in effective tax rates;

•the availability and cost of financing;

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•leverage and debt covenants;

•intellectual property transactions and disputes;

•warranty and product liability claims and the impact of quality excursions and customer disputes and returns;

•costs associated with legal claims, indemnification obligations, judgments and settlements;

•political instability, conflicts (such as the ongoing conflict in Ukraine) and government shutdowns, civil disturbances and international events;

•environmental or natural disasters such as earthquakes, typhoons and volcanic eruptions;

•pandemics or other widespread illnesses that may impact our labor force, operations, liquidity, supply chain and end-user demand for products which incorporate semiconductors, such as the Covid-19 pandemic;

•costs of acquisitions and divestitures and difficulties integrating acquisitions;

•our ability to attract and retain qualified personnel to support our global operations;

•our ability to penetrate new end markets or expand our business in existing end markets;

•dependence on key customers or concentration of customers in certain end markets, such as mobile communications and automotive; and

•restructuring charges, asset write-offs and impairments.

In addition to the above factors, restrictive trade barriers adopted by U.S. and foreign governments applicable to the semiconductor supply chain, including the export rules and regulations adopted by the U.S. government in October 2022 regarding the sale of certain semiconductor chip and chipmaking equipment products to customers in China, could impact our business and the businesses of our customers. These factors may have a material and adverse effect on our business, liquidity, results of operations, financial condition and cash flows or lead to significant volatility in our quarterly or annual operating results. In addition, these factors may materially and adversely affect our credit ratings, which could make it more difficult and expensive for us to raise capital and could materially and adversely affect the price of our securities.

Our factories and operations, and those of our customers and vendors, are located in various foreign jurisdictions, which exposes us to risks arising from international trade restrictions and regional conflict.

We provide packaging and test services through our factories and other operations located in China, Japan, Korea, Malaysia, the Philippines, Portugal, Singapore and Taiwan and are preparing to offer packaging and test services from the Vietnam Facility. Substantially all of our property, plant and equipment is located outside of the United States, and many of our customers and the vendors in our supply chain are also located outside the U.S. The following are some of the risks we face in doing business internationally:

•restrictive trade barriers considered or adopted by U.S. and foreign governments applicable to the semiconductor supply chain, including laws, rules, regulations and policies in areas such as national security, licensing requirements for exports, tariffs, customs and duties, including the export rules and regulations applicable to U.S. companies that sell certain semiconductor and chipmaking equipment products to customers in China;

•laws, rules, regulations and policies within China and other countries that may favor domestic companies over non-domestic companies, including customer- or government-supported efforts to promote the development and growth of local competitors;

•health and safety concerns, including widespread outbreak of infectious diseases, such as Covid-19, and governmental responses thereto;

•changes in consumer demand resulting from current or expected inflation or other variations in local economies;

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•laws, rules, regulations and policies imposed by U.S. or foreign governments in areas such as data privacy, cybersecurity, antitrust and competition, tax, currency and banking, labor, environmental, and health and safety;

•the payment of dividends and other payments by non-U.S. subsidiaries may be subject to prohibitions, limitations or taxes in local jurisdictions;

•fluctuations in currency exchange rates, particularly the U.S. dollar to Japanese yen exchange rate for our operations in Japan;

•political and social conditions, and the potential for civil unrest, terrorism or other hostilities (such as the ongoing conflict in Ukraine);

•disruptions or delays in shipments caused by customs brokers or government agencies;

•difficulties in attracting and retaining qualified personnel and managing foreign operations, including foreign labor disruptions;

•difficulty in enforcing contractual rights and protecting our intellectual property rights;

•potentially adverse tax consequences resulting from tax laws in the U.S. and in other jurisdictions; and

•local business and cultural factors that differ from our normal standards and practices, including business practices that we are prohibited from engaging in by the U.S. Foreign Corrupt Practices Act and other anti-corruption laws and regulations.

On October 7, 2022, the U.S. Bureau of Industry and Security announced new export control regulations applicable to U.S. semiconductor technology sold in China. The new regulations place limitations on the ability of companies to export certain advanced computing semiconductor chips, as well as chipmaking equipment, by requiring companies to obtain licenses to export such products and equipment into China. Certain of the Company’s competitors may be exempt from the new regulations by virtue of being non-U.S. manufacturers. To the extent required, Amkor would pursue export licenses and authorizations, but there can be no assurances that Amkor would obtain such licenses or authorizations on a timely or cost-effective basis or at all, or that our customers will not reroute business that would have otherwise been given to Amkor to one or more of our competitors as a result of the new restrictions, particularly if our competitors have, or are not required to have, required licenses or authorizations that we have not obtained. It is also possible that government agencies in China or in other countries may adopt retaliatory export control rules in response to the new U.S. regulations, which could further impact our business, liquidity, results of operations, financial condition and cash flows.

In addition, we have significant facilities and other investments in Korea, and there have been heightened security concerns in recent years stemming from North Korea’s nuclear weapon and long-range missile programs as well as its military actions in the region. Furthermore, there has been a history of conflict and tension within and among other countries in the region.

The Covid-19 pandemic impacted, and may impact in the future, our operations and the operations of our customers and suppliers as a result of illness, quarantines, facility closures and travel and logistics restrictions in connection with the outbreak. National, regional, and local governments have implemented, and may implement in the future, public health measures to mitigate the spread of Covid-19, the emergence of new variants or the re-emergence of Covid-19 in jurisdictions in which we, our customers and our suppliers operate, and such restrictions may materially and adversely impact our operations and the operations of our customers and suppliers. Such restrictions may also affect end-user demand in each geography where our customers sell their products and services, which may materially and adversely affect demand for our services, our operating results and financial condition. We also remain subject to industry-wide supply constraints and inflationary price pressures, which have resulted in long lead times, rising prices and supply chain disruptions.

We compete against established competitors in the packaging and test business as well as internal capabilities of IDMs and face competition from new competitors, including foundries.

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The outsourced semiconductor packaging and test services market is very competitive. We face substantial competition from established and emerging packaging and test service providers primarily located in Asia, including companies with significantly greater processing capacity, financial resources, local presence, research and development operations, marketing, technology and other capabilities. In addition, we may compete with electronics manufacturing service providers or contract electronics manufacturers that also provide advanced integrated device solutions. We also may face increased competition from domestic companies located in China, where there are government-supported efforts to promote and subsidize the development and growth of the local semiconductor industry. We may be at a disadvantage in attempting to compete with entities associated with such government-supported initiatives based on their lower cost of capital, access to government resources and incentives, preferential sourcing practices, stronger local relationships or otherwise. Our competitors may also have established relationships, or enter into new strategic relationships, with one or more of the large semiconductor companies that are our current or potential customers or key suppliers to these customers. Consolidation among our competitors could also strengthen their competitive position.

Historically, we have also been dependent on the trend in outsourcing of packaging and test services by IDM and foundry customers. Our IDM and foundry customers continually evaluate the need for outsourced services against their own in-house packaging and test services. As a result, at any time and for a variety of reasons, IDMs and foundries may decide to shift some or all of their outsourced packaging and test services to internally sourced capacity. To the extent we limit capacity commitments for certain customers, these customers may increase their level of in-house packaging and test capabilities, which could make it more difficult for us to regain their business when we have available capacity. If we experience a significant loss of IDM or foundry business, it could have a material adverse effect on our business, liquidity, results of operations, financial condition and cash flows, especially during a prolonged industry downturn.

We also face competition from contract foundries, such as Taiwan Semiconductor Manufacturing Company Limited and Samsung Electronics Co., Ltd., which offer full turnkey services from silicon wafer fabrication through packaging and final test. These foundries, which are substantially larger than us and have greater financial resources than we do, have expanded their operations to include packaging and test services and may continue to expand these capabilities in the future. If a key customer decides to purchase wafers from a semiconductor foundry that provides packaging and test services, our business could be adversely affected if the customer also engages that foundry for related packaging and test services.

We cannot assure you that we will be able to compete successfully in the future against our existing or potential competitors, that our customers will not rely on internal sources or foundries for packaging and test services or that our business, liquidity, results of operations, financial condition or cash flows will not be materially and adversely affected by such increased competition.

We make substantial investments in equipment and facilities to support the demand of our customers, which may materially and adversely affect our business if the demand of our customers does not develop as we expect or is adversely affected.

We make significant investments in equipment and facilities in order to service the demand of our customers. The amount of our capital expenditures depends on several factors, including the performance of our business, our assessment of future industry and customer demand, our capacity utilization levels and availability, advances in technology, our liquidity position and the availability of financing. Our ongoing capital expenditure requirements may strain our cash and liquidity, and, in periods when we are expanding our capital base, we expect that depreciation expense and factory operating expenses associated with capital expenditures to increase production capacity will put downward pressure on our gross profit, at least in the near term. From time to time, we also make significant capital expenditures based on specific business opportunities with one or a few key customers, and the additional equipment purchased may not be readily usable to support other customers. If demand is insufficient to fill our capacity, or we are unable to efficiently redeploy such equipment, our capacity utilization and gross profit could be negatively impacted.

Furthermore, if we cannot generate or raise additional funds to pay for capital expenditures, particularly in some of the advanced packaging and bumping areas, as well as research and development activities, our growth and future profitability may be materially and adversely affected. Our ability to obtain external financing in the future is subject to a variety of uncertainties, including: our future financial condition, results of operations and cash flows; general market conditions for financing; volatility in fixed income, credit and equity markets; and economic, political and other global conditions.

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During 2022, we began construction for the first phase of the Vietnam Facility, which will have approximately 1.9 million square feet of space. We expect to complete the first phase and begin high-volume manufacturing in the fourth quarter of 2023. There can be no assurance, however, that the construction will be completed, or that high-volume manufacturing will begin, on that schedule or that the actual scope, costs or benefits of the project will be consistent with our current expectations.

Due to our high percentage of fixed costs, we may be unable to maintain satisfactory gross margins if we are unable to achieve relatively high-capacity utilization rates.

Our operations are characterized by high fixed costs and the absence of any material backlog. Our profitability depends in part not only on pricing levels for our packaging and test services but also on the efficient utilization of our human resources and packaging and test equipment. Increases or decreases in our capacity utilization can significantly affect gross margins. Transitions between different packaging technologies can also impact our capacity utilization if we do not efficiently redeploy our equipment for other packaging and test opportunities. We cannot assure you that we will be able to achieve consistently high-capacity utilization, and if we fail to do so, our gross margins may be negatively impacted.

In addition, our fixed operating costs have increased as a result of capital expenditures for capacity expansion. The anticipated customer demand for which we have made capital investments may not materialize, and our sales may not adequately cover fixed costs, resulting in reduced profit levels or even significant losses, either of which may materially and adversely impact our business, liquidity, results of operations, financial condition and cash flows.

The lack of contractually committed customer demand may materially and adversely affect our sales.

Our packaging and test business does not typically operate with any material backlog. Our quarterly net sales from packaging and test services are substantially dependent upon our customers’ demand in that quarter. Generally, our customers do not commit to purchase any significant amount of packaging or test services or to provide us with binding forecasts of demand for packaging and test services for any future period, in any material amount. In addition, we sometimes experience double booking by customers, and our customers often reduce, cancel or delay their purchases of packaging and test services for a variety of reasons, including industry-wide, customer-specific and Amkor-specific reasons. This makes it difficult for us to forecast our capacity utilization and net sales in future periods. Since a large portion of our costs is fixed and our expense levels are based in part on our expectations of future sales, we may not be able to adjust costs in a timely manner to compensate for any sales shortfall. If we are unable to adjust costs in a timely manner, our margins, operating results, financial condition and cash flows could be materially and adversely affected.

Additionally, while we generally purchase materials based on Amkor’s commitments to customer forecasts, and our customers are generally responsible for any unused materials we purchase based on such commitments, due to the Covid-19 pandemic and the resulting supply chain constraints and extended lead times, we have been placing an increasing number of our orders for materials in advance of customer forecasts. If we are unable to timely fulfill our customers’ orders, or if we are required to bear the cost of a substantial amount of unused materials, our margins, operating results, financial condition and cash flows could be materially and adversely affected.

Historically, there has been downward pressure on the prices of our packaging and test services.

Prices for packaging and test services have generally declined over time, and sometimes prices can change significantly in relatively short periods of time. We expect downward pressure on average selling prices for our packaging and test services to continue in the future, and this pressure may intensify during downturns in business. If we experience declining average selling prices and are unable to offset such declines by developing and marketing new packages with higher prices, reducing our purchasing costs, recovering more of our material cost increases from our customers and

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reducing our manufacturing costs, our business, liquidity, results of operations, financial condition and cash flows could be materially and adversely affected.

Packaging and test processes are complex, and our production yields and customer relationships may suffer from defects in the services we provide or if we do not successfully implement new technologies.

Semiconductor packaging and test services are complex processes that require significant technological and process expertise, and in line with industry practice, customers usually require us to pass a lengthy and rigorous qualification process that may take several months. Once qualified and in production, defective packages primarily result from:

•contaminants in the manufacturing environment;

•human error;

•equipment malfunction;

•changing processes to address environmental requirements;

•defective raw materials; or

•defective plating services.

Test is also complex and involves sophisticated equipment and software. Similar to many software programs, these software programs are complex and may contain programming errors or “bugs.” The test equipment is also subject to malfunction, and the test process is subject to operator error.

These and other factors have, from time to time, contributed to lower production yields. They may also do so in the future, particularly as we adjust our capacity, change our processing steps or ramp new technologies. In addition, we must continue to develop and implement new packaging and test technologies and expand our offering of packages to be competitive. Our production yields on new packages, particularly those packages which are based on new technologies, typically are significantly lower than our production yields on our more established packages.

Our failure to qualify new processes, maintain quality standards or acceptable production yields, if significant and prolonged, could result in the loss of customers, increased costs of production, delays, substantial amounts of returned goods and claims by customers relating thereto. Any of these problems could have a material adverse effect on our business, liquidity, results of operations, financial condition and cash flows.

Our business will suffer if we are not able to develop new proprietary technology, protect our proprietary technology and operate without infringing the proprietary rights of others.

The complexity and scope of semiconductor packaging, SiP modules and test services are rapidly increasing. As a result, we expect to develop, acquire and implement new manufacturing processes and packaging technologies and tools in order to respond to competitive industry conditions and customer requirements. Technological advances may lead to rapid and significant price erosion and may make our existing packages less competitive or our existing inventories obsolete. If we cannot achieve advances in packaging design or obtain access to advanced packaging designs developed by others, our business could suffer.

The need to develop and maintain advanced packaging capabilities and equipment could require significant research and development, capital expenditures and acquisitions in future years. In addition, converting to new packaging designs or process methodologies could result in delays in producing new package types, which could impact our ability to meet customer orders and materially and adversely impact our business.

Although we seek patent protection for some of our technology under U.S. and foreign patent laws, the process of seeking patent protection takes a long time and is expensive. There can be no assurance that patents will issue from pending or future applications or that, if patents are issued, the rights granted under the patents will provide us with meaningful protection or any commercial advantage. Any patents we do obtain will eventually expire and may be challenged, invalidated or circumvented. As a result, such patents may not offer us meaningful protection or provide the commercial advantage for which they were designed.

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Some of our technologies are not covered by any patent or patent application. The confidentiality agreements on which we rely to protect these technologies may be breached or may not be adequate to protect our proprietary technologies. There can be no assurance that other countries in which we market our services will protect our intellectual property rights to the same extent as the U.S.

Our competitors may develop, patent or gain access to know-how and technology similar or superior to our own. In addition, many of our patents are subject to cross licenses, several of which are with our competitors. The semiconductor industry is characterized by frequent claims regarding the infringement of patent and other intellectual property rights. If any third party makes an enforceable infringement claim against us or our customers, we could be required to:

•discontinue the use of certain processes or cease to provide the services at issue, which could curtail our business;

•pay substantial damages;

•develop non-infringing technologies, which may not be feasible; or

•acquire licenses to such technology, which may not be available on commercially reasonable terms or at all.

We may need to enforce our patents or other intellectual property rights, including our rights under patent and intellectual property licenses with third parties, or defend ourselves against claimed infringement of the rights of others through litigation, which could result in substantial cost and diversion of our resources and may not be successful. Furthermore, if we fail to obtain necessary licenses, our business could suffer, and we could be exposed to claims for damages and injunctions from third parties, as well as claims from our customers for indemnification. Unfavorable outcomes in any legal proceedings involving intellectual property could result in significant liabilities or loss of commercial advantage and could have a material adverse effect on our business, liquidity, results of operations, financial condition and cash flows. The potential impact from the legal proceedings referred to in this Form 10-Q on our results of operations, financial condition and cash flows could change in the future.

We may face warranty claims, product return and liability risks, economic damage claims and negative publicity if our packages fail.

Our packages are incorporated into a number of end products. If our packages fail, our business may be exposed to warranty claims, product return and liability risks, economic damage claims and negative publicity.

We receive warranty claims from our customers from time to time in the ordinary course of our business. If we were to experience an unusually high incidence of warranty claims, we could incur significant costs and our business could be materially and adversely affected. In addition, we are exposed to the product and economic liability risks and the risk of negative publicity affecting our customers. Our sales may decline if any of our customers are sued on a product liability claim. We also may suffer a decline in sales from the negative publicity associated with such a lawsuit or with adverse public perceptions in general regarding our customers’ products. Further, if our packages are delivered with defects, we could incur additional development, repair or replacement costs or suffer other economic losses, and our credibility and the market’s acceptance of our packages could be harmed.

Covenants in the indentures and agreements governing our current and future indebtedness could restrict our operating flexibility.

The indentures and agreements governing our existing debt contain, and debt we incur in the future may contain, affirmative and negative covenants that materially limit our ability to take certain actions, including our ability to incur debt, pay dividends and repurchase stock, make certain investments and other payments, enter into certain mergers and consolidations, engage in sale leaseback transactions and encumber and dispose of assets. In addition, certain of our debt agreements contain, and our future debt agreements may contain, financial covenants and ratios.

The breach of any of these covenants by us, or the failure by us to meet any of the financial ratios or conditions, could result in a default under any or all of such indebtedness. If a default occurs under any such indebtedness, all of the outstanding obligations thereunder could become immediately due and payable, which could result in a default under our other outstanding debt and could lead to an acceleration of obligations related to other outstanding debt. The existence

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of such a default or event of default could also preclude us from borrowing funds under our revolving credit facilities. Our ability to comply with the provisions of the indentures, credit facilities and other agreements governing our outstanding debt and indebtedness we may incur in the future can be affected by events beyond our control, and a default under any debt instrument, if not cured or waived, could have a material adverse effect on us.

We may decrease or suspend our quarterly dividend, and any decrease in or suspension of the dividend could cause our stock price to decline.

Since October 2020, we have paid a regular quarterly cash dividend on our outstanding common stock. However, the payment, amount and timing of future cash dividends are subject to the final determination each quarter by our Board of Directors or a committee thereof that there are sufficient funds available to lawfully pay a dividend, that the dividend is compliant with the applicable restrictions in our debt agreements and that the payment of the dividend remains in our and our stockholders’ best interests. The determination will be based on our results of operations, financial condition, cash requirements, debt restrictions and other factors. Given these considerations, we may increase or decrease the amount of the dividend at any time and may also decide to vary the timing of or suspend the payment of dividends in the future. Any decrease or suspension of dividend payments could cause our stock price to decline.

We have significant severance plan obligations associated with our manufacturing operations in Korea which could reduce our cash flow and negatively impact our financial condition.

Our subsidiary in Korea maintains an unfunded severance plan, under which we have an accrued liability of $53.1 million as of March 31, 2023. The plan covers certain employees that were employed prior to August 1, 2015. In the event of a significant layoff or other reduction in our labor force in Korea, our subsidiary in Korea would be required to make lump-sum severance payments under the plan, which could have a material adverse effect on our liquidity, financial condition and cash flows. We have made, and may in the future make, offers to some or all of the covered employees the option to convert from the severance plan to a defined contribution plan. Some employees have accepted previous offers, and future offers to make similar conversions could impact the timing of future payments, reducing our cash flow and materially and adversely affecting our financial condition.

James J. Kim and members of his family can effectively determine or substantially influence the outcome of all matters requiring stockholder approval.

As of March 31, 2023, James J. Kim, the Executive Chairman of our Board of Directors, Susan Y. Kim, the Executive Vice Chairman of our Board of Directors, and members of the Kim family and affiliates owned approximately 142.0 million shares, or approximately 58%, of our outstanding common stock. The Kim family also has options to acquire approximately 0.6 million shares. If the options are exercised, the Kim family’s total ownership would be an aggregate of approximately 142.6 million shares, or approximately 58% of our outstanding common stock.

In June 2013, the Kim family exchanged convertible notes issued by Amkor in 2009 for approximately 49.6 million shares of common stock (the “Convert Shares”). The Convert Shares are subject to a voting agreement. The voting agreement requires the Kim family to vote these shares in a “neutral manner” on all matters submitted to our stockholders for a vote, so that such Convert Shares are voted in the same proportion as all of the other outstanding securities (excluding the other shares owned by the Kim family) that are actually voted on a proposal submitted to Amkor’s stockholders for approval. The Kim family is not required to vote in a “neutral manner” any Convert Shares that, when aggregated with all other voting shares held by the Kim family, represent 41.6% or less of the total then-outstanding voting shares of our common stock. The voting agreement for the Convert Shares terminates upon the earliest of (i) such time as the Kim family no longer beneficially owns any of the Convert Shares, (ii) consummation of a change of control (as defined in the voting agreement) or (iii) the mutual agreement of the Kim family and Amkor.

Mr. Kim and his family and affiliates, acting together, have the ability to effectively determine or substantially influence matters submitted for approval by our stockholders by voting their shares or otherwise acting by written consent, including the election of our Board of Directors. There is also the potential, through the election of members of our Board of Directors, that the Kim family could substantially influence matters decided upon by our Board of Directors. This concentration of ownership may also have the effect of impeding a merger, consolidation, takeover or other business consolidation involving us, or discouraging a potential acquirer from making a tender offer for our shares, and could also negatively affect our stock’s market price or decrease any premium over market price that an acquirer might otherwise pay. Concentration of ownership also reduces the public float of our common stock. There may be less

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liquidity and higher price volatility for the stock of companies with a smaller public float compared to companies with broader public ownership. Also, the sale or the prospect of the sale of a substantial portion of the Kim family shares may cause the market price of our stock to decline significantly.

General Risk Factors

The loss of certain customers or reduced orders or pricing from existing customers may have a material adverse effect on our operations and financial results.

We have derived and expect to continue to derive a large portion of our revenues from a small group of customers during any particular period due in part to the concentration of market share in the semiconductor industry. Our ten largest customers accounted for, in the aggregate, 65% of our net sales for the year ended December 31, 2022. In addition, we have significant customer concentration within our end markets. The loss of a significant customer, a business combination among our customers, a reduction in orders or decrease in price from a significant customer or disruption in any of our significant commercial arrangements may result in a decline in our sales and profitability and could have a material adverse effect on our business, liquidity, results of operations, financial condition and cash flows.

The demand for our services from each customer is directly dependent upon that customer’s financial health, level of business activity and purchasing decisions, the quality and price of our services, our cycle time and delivery performance, the customer’s qualification of additional competitors on products we package or test and a number of other factors. Each of these factors could vary significantly from time to time resulting in the loss or reduction of customer orders, and we cannot be sure that our key customers or any other customers will continue to place orders with us in the future at the same levels as in past periods.

For example, as seen in the automotive end market in 2020, the Covid-19 pandemic and restrictions imposed by governmental authorities to mitigate the spread of Covid-19 in our customers’ end markets may decrease demand for our customers’ products and services, thereby adversely impacting their demand for our services.

In addition, from time to time, we may acquire or build new facilities or migrate existing business among our facilities. In connection with these facility changes or new facility constructions, our customers require us to qualify the new facilities even though we have already qualified to perform the services at our other facilities. We cannot assure that we will successfully qualify facility changes, that we will complete construction of new facilities in a timely manner or that our customers will not qualify our competitors and move the business for such services.

The Covid-19 pandemic has impacted, and may impact in the future, the supply chain and consumer demand for our customers’ products and services, and such impact on the supply chain and consumer demand may ultimately have a material and adverse effect on our business, results of operations and financial condition.

The impacts of the Covid-19 pandemic have varied, and may continue to vary, by location, by industry and by end market. We, our suppliers and our customers have been disrupted by worker illness and absenteeism, quarantines and restrictions on employees’ ability to work, office and factory closures, disruptions to ports and other shipping infrastructure and border closures or other travel or health-related restrictions. Restrictions on our workforce or access to our manufacturing facilities, or similar limitations for our suppliers, or restrictions or disruptions of transportation could limit our capacity to meet customer demand and have a material adverse effect on our business, results of operations and financial condition. Such restrictions and efforts to contain the spread of Covid-19 have caused, and may cause in the future, disruptions to our supply chain in connection with the sourcing of equipment, supplies and other materials. The resumption of normal business operations after any such restrictions are lifted may be delayed or constrained by lingering effects of the Covid-19 pandemic on our suppliers or customers or both, and additional restrictions may be implemented in response to the emergence of new variants or re-emergence of Covid-19. Additionally, other national, regional and local governments have implemented, and may implement in the future, restrictions to mitigate the spread of Covid-19, the emergence of new variants, or the re-emergence of Covid-19 in jurisdictions in which we, our customers and our suppliers operate (such as the government-mandated lockdown of our Shanghai factory during the second quarter of 2022), and such restrictions may materially and adversely impact our operations and the operations of

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our customers and suppliers. We also remain subject to industry-wide supply constraints and inflationary price pressures, which have resulted in long lead times, rising prices and supply chain disruptions.

The spread of Covid-19 caused us to modify our business practices (including corporate hygiene protocols at factories, restricting employee travel and employee work locations and cancelling physical participation in meetings, events and conferences) and, while the long-term impact of the Covid-19 pandemic remains uncertain, we have retained many of those enhanced measures as part of our commitment to protect the health and safety of our employees. We may also take further actions in the future as may be required by government authorities or that we determine to be in the best interests of our employees, customers and suppliers. There is no certainty that such measures will be sufficient to mitigate the future impact of the Covid-19 pandemic, and our ability to perform critical functions could be harmed.

At this time, we are unable to predict the nature or duration of future actions that may be taken by governmental authorities and other businesses in response to the Covid-19 pandemic (including any emergence of new variants).

Our substantial indebtedness could have a material adverse effect on our financial condition and prevent us from fulfilling our obligations.

We have a substantial amount of debt, and the terms of the agreements governing our indebtedness allow us and our subsidiaries to incur more debt, subject to certain limitations. As of March 31, 2023, our total debt balance was $1,197.5 million, of which $137.5 million was classified as a current liability and $650.4 million was collateralized indebtedness at our subsidiaries. We may consider investments in joint ventures, increased capital expenditures, refinancings or acquisitions which may increase our indebtedness. If new debt is added to our consolidated debt level, the related risks that we face could increase.

Our substantial indebtedness could:

•make it more difficult for us to satisfy our obligations with respect to our indebtedness, including our obligations under our indentures to purchase notes tendered as a result of a change in control of Amkor;

•increase our vulnerability to general adverse economic and industry conditions;

•limit our ability to fund future working capital, capital expenditures, research and development and other business opportunities, including joint ventures and acquisitions;

•require us to dedicate a substantial portion of our cash flow from operations to service payments of interest and principal on our debt, thereby reducing the availability of our cash flow to fund future working capital, capital expenditures, research and development expenditures and other general corporate requirements;

•increase the volatility of the price of our common stock;

•limit our flexibility to react to changes in our business and the industry in which we operate;

•place us at a competitive disadvantage to any of our competitors that have less debt;

•limit, along with the financial and other covenants in our indebtedness, our ability to borrow additional funds;

•limit our ability to refinance our existing indebtedness, particularly during periods of adverse credit market conditions when refinancing indebtedness may not be available under interest rates and other terms acceptable to us or at all; and

•increase our cost of borrowing.

We are exposed to fluctuations in interest rates and changes in credit risk, which could have a material adverse impact on our earnings as it relates to the market value of our investment portfolio.

We maintain an investment portfolio of various holdings, types and maturities. Our portfolio includes available-for-sale debt investments, the values of which are subject to market price volatility resulting from interest rate movements, changes in credit risk and financial market conditions. If such investments suffer market price declines, we may

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recognize in earnings the decline in the fair value of our investments below their cost basis when the decline is judged to be an impairment, including an allowance for credit loss.

We may have difficulty funding liquidity needs.

We assess our liquidity based on our current expectations regarding sales and operating expenses, capital spending, dividend payments, stock repurchases, debt service requirements and other funding needs. We fund our operations, including capital expenditures and other investments and servicing principal and interest obligations with respect to our debt, from cash flows from our operations, existing cash and cash equivalents, borrowings under available debt facilities, or proceeds from any additional debt or equity financing. Our liquidity is affected by, among other factors, volatility in the global economy and credit markets, the performance of our business, our capital expenditures and other investment levels, other uses of our cash, including any payments of dividends and purchases of stock under any stock repurchase program, any acquisitions or investments in joint ventures and any decisions we might make to either repay debt and other long-term obligations out of our operating cash flows or refinance debt at or prior to maturity with the proceeds of debt or equity financings.

Servicing our current and future customers requires that we incur significant operating expenses and continue to make significant capital expenditures and other investments, and the amount of our capital expenditures for 2023 and thereafter may vary materially and will depend on several factors. These factors include, among others, the amount, timing and implementation of our capital projects, the performance of our business, economic and market conditions, advances in technology, the cash needs and investment opportunities for the business, the need for additional capacity and facilities and the availability of cash flows from operations or financing.

The health of the worldwide banking system and capital markets also affects our liquidity. If financial institutions that have extended credit commitments to us are adversely affected by the conditions of the U.S., foreign or international banking system and capital markets (including as a result of rising interest rates, economic downturns or other developments), they may refuse or be unable to fund borrowings under their credit commitments to us. The U.S. Federal Reserve raised interest rates several times during 2022 and has signaled further rate increases in the near term. Volatility in the banking system and capital markets, as well as any further increase in interest rates or adverse economic, political, public health or other global conditions, could also make it difficult or more expensive for us to maintain our existing credit facilities or refinance our debt.

The trading price of our common stock has been, and is likely to continue to be, highly volatile and could be subject to wide fluctuations. Such fluctuations could impact our decision or ability to utilize the equity markets as a potential source of our funding needs in the future.

In addition, there is a risk that we could fail to generate the necessary net income or operating cash flows to meet the funding needs of our business due to a variety of factors, including the other factors discussed in this “Risk Factors” section. If we fail to generate the necessary cash flows or we are unable to access the capital markets when needed, our liquidity could be materially and adversely impacted.

We face risks trying to attract, retain or replace qualified employees to support our operations.

Our success depends to a significant extent upon the continued service of our key senior management, sales and technical personnel, any of whom may be difficult to replace. Competition for qualified employees is intensifying, accelerated by increasing competition in the semiconductor industry for talent to meet strong demand, and our business could be materially and adversely affected by the loss of the services of any of our existing key personnel, including senior management and technical talent, as a result of competition or for any other reason. Labor shortages could also result in higher wages that would increase our labor costs, which could reduce our profits. Although we have entered into agreements with our Chief Executive Officer and certain other executives that would prevent them from working for, or impose financial penalties for doing business with, our competitors in the event that those executives cease working for us, we cannot assure you that we will be successful in our efforts to retain or replace key employees or in hiring and

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properly training sufficient numbers of qualified personnel and in effectively managing our growth. Our inability to attract, retain, motivate and train qualified new personnel could have a material adverse effect on our business.

If we fail to maintain an effective system of internal controls, we may not be able to accurately report financial results or prevent fraud.

Our internal controls over financial reporting may not prevent or detect misstatements because of their inherent limitations, including the possibility of human error, the circumvention or overriding of controls, fraud or corruption. Therefore, even effective internal controls can provide only reasonable assurance with respect to the preparation and fair presentation of financial statements. In addition, projections concerning the effectiveness of internal controls in future periods are subject to the risk that our internal controls may become inadequate because of changes in conditions, or that the degree of compliance with our policies or procedures may deteriorate.

We assess our internal controls and systems on an ongoing basis, and from time-to-time, we update and make modifications to our global enterprise resource planning system. We have implemented several significant enterprise resource planning and shop floor management systems and expect to implement additional similar systems in the future. There is a risk that deficiencies may occur that could constitute significant deficiencies or, in the aggregate, a material weakness.

If we fail to remedy any deficiencies or maintain the adequacy of our internal controls, we could be subject to regulatory scrutiny, civil or criminal penalties or shareholder litigation. In addition, failure to maintain adequate internal controls could result in financial statements that do not accurately reflect our operating results or financial condition.

We face risks in connection with the continuing development and implementation of changes to, and maintenance and security of, our information technology systems.

We depend on our information technology systems for many aspects of our business. Our systems may be susceptible to damage, disruptions or shutdowns due to failures during the process of upgrading, replacing or maintaining software, databases or components thereof, power outages, hardware failures, interruption or failures of third-party provider systems, computer viruses, attacks by computer hackers, ransomware attacks, telecommunication failures, user errors, malfeasance or catastrophic events. Such events have occurred in the past and may occur in the future. Cybersecurity breaches could result in unauthorized disclosure of confidential information or disruptions to our operations. While we have not experienced a material information security breach, we cannot be sure that such a breach will not occur in the future. The IT systems in our factories are at varying levels of sophistication and maturity as the factories have different sets of products, processes and customer expectations. Some of our key software has been developed by our own programmers, and this software may not be easily integrated with other software and systems. From time to time, we make additions or changes to our information technology systems. For example, we continue to further integrate our Japan operations’ information technology systems into our existing systems and processes. We face risks in connection with current and future projects to install or integrate new information technology systems or upgrade our existing systems. These risks include:

•delays in the design and implementation of the system;

•costs may exceed our plans and expectations; and

•disruptions resulting from the implementation, integration or cybersecurity breach of the systems may impact our ability to process transactions and delay shipments to customers, impact our results of operations or financial condition or harm our control environment.

Our business could be materially and adversely affected if our information technology systems are disrupted or if we are unable to successfully install new systems or improve, upgrade, integrate or expand upon our existing systems. We maintain insurance policies for various types of information security risks, including network security and privacy liability for third party claims, and business interruption and system failure reimbursement coverage, but we do not carry insurance for all the above referred risks. With regard to the insurance we do maintain, we cannot assure you that it would be sufficient to cover all of our potential losses. As a result, our business, financial condition, results of operations and cash flows could be materially and adversely affected by a disruption, failure or breach of our information technology systems.

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We face challenges as we integrate diverse operations.

We have experienced, and expect to continue to experience, change in the scope and complexity of our operations resulting primarily from existing and future facility and operational consolidations, facility and operational expansions, strategic acquisitions, joint ventures and other partnering arrangements. Some of the risks from these activities include those associated with the following:

•increasing the scope, geographic diversity and complexity of our operations;

•conforming an acquired company’s standards, practices, systems and controls with our operations;

•increasing complexity from combining recent acquisitions of an acquired business;

•unexpected losses of key employees or customers of an acquired business;

•difficulties in the assimilation of acquired operations, technologies or products; and

•diversion of management and other resources from other parts of our operations and adverse effects on existing business relationships with customers.

In connection with these activities, we may:

•incur costs associated with personnel reductions and voluntary retirement programs;

•record restructuring charges to cover costs associated with facility consolidations and related cost reduction initiatives;

•use a significant portion of our available cash;

•incur substantial debt;

•issue equity securities, which may dilute the ownership of current stockholders;

•incur or assume known or unknown contingent liabilities; and

•incur large, immediate accounting write offs and face antitrust or other regulatory inquiries or actions.

For example, the businesses we have acquired had, at the time of acquisition, multiple systems for managing their own production, sales, inventory and other operations. Migrating these businesses to our systems typically is a slow, expensive process requiring us to divert significant resources from other parts of our operations. We may continue to face these challenges in the future. As a result of the risks discussed above, the anticipated benefits of these or other future acquisitions, consolidations and partnering arrangements may not be fully realized, if at all, and these activities could have a material adverse effect on our business, financial condition and results of operations.

We could suffer adverse tax and other financial consequences if there are changes in tax laws or taxing authorities do not agree with our interpretation of applicable tax laws, including whether we continue to qualify for conditional reduced tax rates, or if we are required to establish or adjust valuation allowances on deferred tax assets.

We earn a substantial portion of our income in foreign countries, and our operations are subject to tax in multiple jurisdictions with complicated and varied tax regimes. Tax laws and income tax rates in these jurisdictions are subject to change due to economic and political conditions. Changes in the tax laws of foreign jurisdictions could arise as a result of the base erosion and profit shifting project that was undertaken by the Organization for Economic Cooperation and Development (“OECD”). The OECD, which represents a coalition of member countries, recommended changes to long-standing tax principles related to transfer pricing and has developed model rules including establishing a global minimum corporate income tax tested on a jurisdictional basis (the “Pillar Two Model Rules”). Some countries have already started to implement laws based on the Pillar Two Model Rules. Changes in U.S. or foreign tax laws, including

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new or modified guidance with respect to existing tax laws, could have a material adverse impact on our liquidity, results of operations, financial condition and cash flows.

Our tax liabilities are based, in part, on our corporate structure, interpretations of various U.S. and foreign tax laws, including withholding tax, compliance with conditional reduced tax rate requirements, application of changes in tax law to our operations and other relevant laws of applicable taxing jurisdictions. From time to time, taxing authorities may conduct examinations of our income tax returns and other regulatory filings. We cannot assure you that the taxing authorities will agree with our interpretations, including whether we continue to qualify for conditional reduced tax rates. If they do not agree, we may seek to enter into settlements with the taxing authorities. We may also appeal a taxing authority’s determination to the appropriate governmental authorities, but we cannot be sure we will prevail. If we do not prevail or if we enter into settlements with taxing authorities, we may have to make significant payments or otherwise record charges (or reduce tax assets) that materially and adversely affect our results of operations, financial condition and cash flows. Additionally, certain of our subsidiaries operate under conditional reduced tax rates, which will expire in whole or in part at various dates in the future. As those conditional reduced tax rates expire, we expect that our tax expense will increase as income from those jurisdictions becomes subject to higher statutory income tax rates, thereby reducing our liquidity and cash flow.

We monitor on an ongoing basis our ability to utilize our deferred tax assets and whether there is a need for a related valuation allowance. In evaluating our ability to recover our deferred tax assets, in the jurisdiction from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies and recent results of operations. In the event taxable income falls short of current expectations, we may need to establish a valuation allowance against such deferred tax assets that, if required, could materially and adversely affect our results of operations.

Environmental, health and safety liabilities and expenditures could have a material adverse effect on our business, results of operation and financial condition.

Environmental, health and safety laws and regulations in places we do business impose various controls on the use, storage, handling, discharge and disposal of chemicals used or generated in, or emitted by, our production processes, on the factories we occupy and on the materials contained in semiconductor products. For example, at our foreign facilities we produce liquid waste when semiconductor wafers are diced into chips with the aid of diamond saws, then cooled with running water. In addition, semiconductor packages have historically utilized metallic alloys containing lead within the interconnect terminals typically referred to as leads, pins or balls, and the European Union’s Restriction of Hazardous Substances in Electrical and Electronic Equipment directive and similar laws in other jurisdictions, including China, impose strict restrictions on the placement into the market of electrical and electronic equipment containing lead and certain other hazardous substances. We may become liable under these and other environmental, health and safety laws and regulations, including for the cost of compliance and cleanup of any disposal or release of hazardous materials arising out of our former or current operations, or otherwise as a result of the emission of greenhouse gases (“GHGs”) or other chemicals, the existence of hazardous materials on our properties or the existence of hazardous substances in the products for which we perform our services. We could also be held liable for damages, including fines, penalties and the cost of investigations and remedial actions, we could be subject to revocation of permits, which may materially and adversely affect our ability to maintain or expand our operations. Additionally, if Amkor is unable to align its environmental, health and safety practices with shifting customer preferences, we could suffer reputational harm, which could have a material and adverse effect on our business, results of operations, liquidity and cash flows.

There has also been an increase in public attention and industry and customer focus on the materials contained in semiconductor products, the environmental impact of semiconductor operations and the risk of chemical releases from such operations, climate change, sustainability and related environmental concerns. This increased focus on sustainability and the environmental impact of semiconductor operations and products has caused industry groups and customers to impose additional requirements on us and our suppliers, sometimes exceeding regulatory standards. These industry and customer requirements include increased tracking and reporting of GHG emissions, reductions in waste and wastewater from operations, additional reporting on the materials and components used in the products for which we perform our services, and the use of renewable energy sources in our factory operations. To comply with these additional requirements, we may need to procure additional equipment or make factory or process changes and our operating costs may increase.

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Our business and financial condition has been adversely affected, and could be adversely affected in the future, by natural disasters and other calamities, health conditions or pandemics, political instability, hostilities or other disruptions.

We have significant packaging and test services and other operations in China, Japan, Korea, Malaysia, the Philippines, Portugal, Singapore and Taiwan, and the Vietnam Facility is a new factory under construction in Vietnam. Such operations are or could be subject to: natural disasters, such as earthquakes, tsunamis, typhoons, floods, droughts, volcanoes and other severe weather and geological events, and other calamities, such as fire; the outbreak of infectious diseases (such as Covid-19 and other coronaviruses, Ebola or flu); industrial strikes; government-imposed travel restrictions or quarantines; breakdowns of equipment; difficulties or delays in obtaining materials, equipment, utilities and services; political events or instability; acts of war or armed conflict (such as the ongoing conflict in Ukraine); terrorist incidents and other hostilities in regions where we have facilities; and industrial accidents and other events, that could disrupt or even shutdown our operations. While our global manufacturing footprint allows us to shift production to other factories without substantial cost or production delays, certain of our services are currently performed using equipment located in one or a subset of our factories. A major disruption or shutdown of any such factory could completely impair our ability to perform those services or require us to shift them to another location. As a result, our ability to fulfill customer orders may be impaired or delayed, and we could incur significant losses.

For example, in April 2016, our Kumamoto factory was damaged by earthquakes in Japan. As a result of these earthquakes, our sales were reduced due to the temporary disruption in operations, and we incurred earthquake-related costs for damaged inventory, buildings and equipment. Our suppliers and customers also have significant operations in such locations, and this could compound the effect of any such disruption. In the event of such a disruption or shutdown, we may be unable to reallocate production to other facilities in a timely or cost-effective manner (if at all), and we may not have sufficient capacity, or customer approval, to service customer demands in our other facilities. A natural disaster or other calamity, political instability, the occurrence of hostilities or other event that results in a prolonged disruption to our operations, or the operations of our customers or suppliers, could have a material adverse effect on our business, financial condition, results of operations and cash flows.

In addition, some of the processes that we utilize in our operations place us at risk of fire and other damage. For example, highly flammable gases are used in the preparation of wafers holding semiconductor devices for flip chip packaging.

We maintain insurance policies for various types of property, casualty and other risks, but we do not carry insurance for all the above referred risks. With regard to the insurance we do maintain, we cannot assure you that it would be sufficient to cover all of our potential losses. As a result, our business, financial condition, results of operations and cash flows could be materially and adversely affected by natural disasters and other calamities.

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

Issuer Repurchase of Equity Securities

The following table provides information regarding repurchases of our common stock during the three months ended March 31, 2023.


Period	Total Number of Shares Purchased (a)	Average Price Paid Per Share ($)		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (b)	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs ($) (b)
January 1 - January 31	—	$	—	—	$	91,586,032
February 1 - February 28	110,626	25.52		—	91,586,032
March 1 - March 31	—	—		—	91,586,032
Total	110,626	$	25.52	—

(a)Represents shares of common stock surrendered to us to satisfy tax withholding obligations associated with the shares issued to employees in connection with share-based compensation.

(b)On August 30, 2011, we announced that our Board of Directors had authorized the repurchase of up to $150.0 million of our common stock, exclusive of any fees, commissions or other expenses, under the Stock Repurchase Program. On February 1, 2012, we announced that our Board of Directors had authorized an additional $150.0 million for the repurchase of our common stock under the Stock Repurchase Program, resulting in a total repurchase authorization under the Stock Repurchase Program of $300.0 million. Pursuant to the Stock Repurchase Program, we made no common stock purchases for the three months ended March 31, 2023, and at March 31, 2023, approximately $91.6 million was available for repurchase. Repurchases of our common stock under the Stock Repurchase Program are funded with available cash, and the Stock Repurchase Program may be suspended or discontinued at any time.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

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Second Amended and Restated Non-Employee Director Compensation Policy*

Item 6. Exhibits

Incorporated by Reference

Included Herewith

Exhibit Number

Exhibit Description

Form

Period Ending

Exhibit

Filing Date

10.1

10-K

12/31/22

10.25

2/22/23

10.2

Executive Severance Agreement, dated February 13, 2023, between Amkor Technology, Inc. and Kevin Engel*

10-K

12/31/22

10.34

2/22/23

10.3

Executive Employment Agreement, effective January 1, 2023, between Amkor Technology Korea, Inc. and Steve Shin*†

10-K

12/31/22

10.35

2/22/23

31.1

Certification of Guillaume Marie Jean Rutten, Chief Executive Officer of Amkor Technology, Inc., pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended

31.2

Certification of Megan Faust, Chief Financial Officer of Amkor Technology, Inc., pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended

Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002**

101.INS

Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

101.SCH

Inline XBRL Taxonomy Extension Schema Document

101.CAL

Inline XBRL Taxonomy Extension Calculation Linkbase Document

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Inline XBRL Taxonomy Extension Label Linkbase Document

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Inline XBRL Taxonomy Extension Presentation Linkbase Document

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Inline XBRL Taxonomy Extension Definition Linkbase Document

104

Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

*Indicates management compensatory plan, contract or arrangement.

**Furnished herewith.

† Exhibit includes confidential information that has been redacted.

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Revenue from Contract with Customer [Abstract]

SIGNATURES

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

AMKOR TECHNOLOGY, INC.



			By:			/s/ Megan Faust
						Megan Faust
						Executive Vice President,
						Chief Financial Officer and Treasurer
						(Principal Financial Officer and Principal Accounting Officer)

Date: May 3, 2023

-50-

EX-31.1 2 amkr3312023ex311.htm EX-31.1 Document

Exhibit 31.1

SECTION 302 CERTIFICATION

I, Guillaume Marie Jean Rutten, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Amkor Technology, 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 circumstances 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 present 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)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

d)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.


			/s/ Guillaume Marie Jean Rutten
			Guillaume Marie Jean Rutten
			President and Chief Executive Officer

May 3, 2023

EX-31.2 3 amkr3312023ex312.htm EX-31.2 Document

Exhibit 31.2

SECTION 302 CERTIFICATION

I, Megan Faust, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Amkor Technology, Inc.;

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.


			/s/ Megan Faust
			Megan Faust
			Executive Vice President,
			Chief Financial Officer and Treasurer

May 3, 2023

EX-32 4 amkr3312023ex32.htm EX-32 Document

Exhibit 32

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

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

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

For purposes of Section 1350 of Chapter 63 of Title 18 of the United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned officers of Amkor Technology, Inc., a Delaware corporation (the “Company”), does hereby certify, to such officer’s knowledge, that the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2023 (the “Form 10-Q”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)) and that the information contained in the Form 10-Q fairly presents in all material respects the financial condition and results of operations of the Company.


/s/ Guillaume Marie Jean Rutten
By:			Guillaume Marie Jean Rutten
Title:			President and Chief Executive Officer
Date:			May 3, 2023


/s/ Megan Faust
By:			Megan Faust
Title:			Executive Vice President,
			Chief Financial Officer and Treasurer
Date:			May 3, 2023

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activities Net Cash Provided by (Used in) Financing Activities TIBOR Tokyo Interbank Offered Rate (TIBOR) [Member] Tokyo Interbank Offered Rate (TIBOR) [Member] Borrowing capacity available Debt Instrument, Unused Borrowing Capacity, Amount Payroll and benefits Employee-related Liabilities, Current Line of Credit Line of Credit [Member] Asset-backed securities Asset-Backed Securities [Member] Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Earnings Per Share Earnings Per Share [Text Block] Japanese yen Japan, Yen Foreign Currency Translation Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Interest cost Defined Benefit Plan, Interest Cost After 1 year through 5 years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One 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Registrant Name China CHINA Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Entity Address, City or Town Entity Address, City or Town Pension Plans Retirement Benefits [Text Block] Total equity Balance at beginning of period Balance at end of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Minimum Minimum [Member] Non-controlling interests in subsidiaries Stockholders' Equity Attributable to Noncontrolling Interest Within 1 year, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Treasury Stock Treasury Stock, Common [Member] Fair Value Measurements Fair Value Disclosures [Text Block] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Trading Symbol Trading Symbol Entity File Number Entity File Number Treasury stock, shares (in shares) Balance at beginning of period, treasury stock (in shares) Balance at end of period, treasury stock (in shares) Treasury Stock, Common, Shares Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accrued interest Interest Payable, Current Research and development Research and Development Expense Payments for short-term investments Payments to Acquire Short-Term Investments Term loan, fixed rate at 1.20%, due December 2025 Term Loan, Fixed Rate at 1.20% Due December 2025 [Member] Term Loan, Fixed Rate at 1.20% Due December 2025 Comprehensive loss (income) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Use of Estimates Use of Estimates, Policy [Policy Text Block] LIBOR London Interbank Offered Rate (LIBOR) [Member] Concentration risk, percentage Concentration Risk, Percentage Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Income Taxes Income Tax Disclosure [Text Block] Credit Facility [Domain] Credit Facility [Domain] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Basic (in dollars per share) Earnings Per Share, Basic Factoring of Accounts Receivable [Abstract] Factoring of Accounts Receivable [Abstract] Factoring of Accounts Receivable [Abstract] Total debt Debt, Long-Term and Short-Term, Combined Amount Mainstream products Mainstream Products [Member] Mainstream Products [Member] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Total Amkor stockholders’ equity Stockholders' Equity Attributable to Parent Total, fair value Debt Securities, Available-For-Sale, And Cash Equivalents, Fair Value Disclosure Debt Securities, Available-For-Sale, And Cash Equivalents, Fair Value Disclosure Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Right of use assets acquired through finance lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability After 5 years through 10 Years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Subsidiary Term Loans Subsidiary Term Loans [Member] Subsidiary Term Loans [Member] Entity Interactive Data Current Entity Interactive Data Current Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Amount of leases not yet commenced Lessee, Lease Not Yet Commenced, Liability Lessee, Lease Not Yet Commenced, Liability Money market funds Money Market Funds [Member] Proceeds from sale of short-term investments Proceeds from Sale of Debt Securities, Available-for-Sale Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Retained Earnings Retained Earnings [Member] Common Stock Common Stock [Member] Issuance of stock through share-based compensation plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Changes in assets and liabilities Increase (Decrease) in Operating Capital Income Taxes Income Tax, Policy [Policy Text Block] Statement [Table] Statement [Table] Payments of long-term debt Repayments of Other Long-Term Debt Credit facility, base amount Line of Credit Facility, Maximum Borrowing Capacity Base Amount Line of Credit Facility, Maximum Borrowing Capacity Base Amount Document Quarterly Report Document Quarterly Report Furniture, fixtures and other equipment Furniture and Fixtures [Member] Current assets: Assets, Current [Abstract] Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Variable rate demand notes Variable Rate Demand Obligation [Member] Unbilled receivables Unbilled Receivables, Current Defined contribution expense Defined Contribution Plan, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] Retained earnings Retained Earnings (Accumulated Deficit) After 10 Years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Cash equivalents, amortized cost Cash Equivalents, at Carrying Value Accounts receivable, net of allowances Accounts Receivable, after Allowance for Credit Loss, Current Statement, Equity Components [Axis] Equity Components [Axis] Equity Components [Axis] Document Fiscal Year Focus Document Fiscal Year Focus Accrued severance plan obligations Supplemental Unemployment Benefits, Severance Benefits Factoring of Accounts Receivable Factoring Of Accounts Receivable [Text Block] Factoring Of Accounts Receivable Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Statement [Line Items] Statement [Line Items] EX-101.PRE 9 amkr-20230331_pre.xml INLINE XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT XML 10 R1.htm IDEA: XBRL DOCUMENT

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2023	Apr. 27, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	000-29472
Entity Registrant Name	AMKOR TECHNOLOGY, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-1722724
Entity Address, Address Line One	2045 East Innovation Circle
Entity Address, City or Town	Tempe
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85284
City Area Code	480
Local Phone Number	821-5000
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	AMKR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		245,640,706
Entity Central Index Key	0001047127
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML 11 R2.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 1,471,539	$ 1,596,816
Cost of sales	1,277,118	1,271,486
Gross profit	194,421	325,330
Selling, general and administrative	78,671	76,959
Research and development	47,047	38,363
Total operating expenses	125,718	115,322
Operating income	68,703	210,008
Interest expense	16,167	14,148
Other (income) expense, net	(3,552)	(5,096)
Total other expense, net	12,615	9,052
Income before taxes	56,088	200,956
Income tax expense	10,864	29,728
Net income	45,224	171,228
Net loss (income) attributable to non-controlling interests	127	(565)
Net income attributable to Amkor	$ 45,351	$ 170,663
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.18	$ 0.70
Diluted (in dollars per share)	$ 0.18	$ 0.69
Shares used in computing per common share amounts:
Basic (in shares)	245,330	244,403
Diluted (in shares)	247,087	246,000

XML 12 R3.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 45,224	$ 171,228
Other comprehensive income (loss), net of tax:
Adjustments to net unrealized gains (losses) on available-for-sale debt investments	601	(1,077)
Adjustments to unrealized components of defined benefit pension plans	(97)	4
Foreign currency translation	(2,113)	(8,409)
Total other comprehensive income (loss)	(1,609)	(9,482)
Comprehensive income	43,615	161,746
Comprehensive loss (income) attributable to non-controlling interests	127	(565)
Comprehensive income attributable to Amkor	$ 43,742	$ 161,181

XML 13 R4.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 909,802	$ 959,072
Short-term investments (amortized cost of $342,872 and $283,641 in 2023 and 2022, respectively)	341,822	281,964
Accounts receivable, net of allowances	1,165,240	1,365,504
Inventories	568,565	629,576
Other current assets	48,174	65,123
Total current assets	3,033,603	3,301,239
Property, plant and equipment, net	3,185,278	3,135,614
Operating lease right of use assets	152,650	171,163
Goodwill	21,235	21,517
Restricted cash	3,497	3,334
Other assets	185,528	188,890
Total assets	6,581,791	6,821,757
Current liabilities:
Short-term borrowings and current portion of long-term debt	137,469	143,813
Trade accounts payable	666,615	899,164
Capital expenditures payable	228,056	146,602
Short-term operating lease liability	64,235	70,991
Accrued expenses	361,174	401,841
Total current liabilities	1,457,549	1,662,411
Long-term debt	1,059,997	1,088,521
Pension and severance obligations	91,359	93,540
Long-term operating lease liabilities	63,278	75,745
Other non-current liabilities	182,445	201,839
Total liabilities	2,854,628	3,122,056
Commitments and contingencies (Note 15)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, designated Series A, none issued	0	0
Common stock, $0.001 par value, 500,000 shares authorized; 291,814 and 291,249 shares issued; and 245,545 and 245,091 shares outstanding in 2023 and 2022, respectively	292	291
Additional paid-in capital	2,001,575	1,996,344
Retained earnings	1,901,569	1,874,644
Accumulated other comprehensive income (loss)	15,090	16,699
Treasury stock, at cost, 46,269 and 46,158 shares in 2023 and 2022, respectively	(222,049)	(219,226)
Total Amkor stockholders’ equity	3,696,477	3,668,752
Non-controlling interests in subsidiaries	30,686	30,949
Total equity	3,727,163	3,699,701
Total liabilities and equity	$ 6,581,791	$ 6,821,757

XML 14 R5.htm IDEA: XBRL DOCUMENT

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Short term investments amortized cost	$ 342,872	$ 283,641
Stockholders’ equity:
Preferred stock designated Series A, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock designated Series A, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock designated Series A, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	291,814,000	291,249,000
Common stock, shares outstanding (in shares)	245,545,000	245,091,000
Treasury stock, shares (in shares)	46,269,000	46,158,000

XML 15 R6.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Total Amkor Stockholders’ Equity	Common Stock	Additional Paid- In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest in Subsidiaries
Balance at beginning of period, common stock (in shares) at Dec. 31, 2021			290,466
Balance at beginning of period at Dec. 31, 2021	$ 2,972,546	$ 2,942,276	$ 290	$ 1,977,134	$ 1,163,939	$ 19,978	$ (219,065)	$ 30,270
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2022							(46,155)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	171,228	170,663			170,663			565
Other comprehensive income (loss)	(9,482)	(9,482)				(9,482)
Treasury stock acquired through surrender of shares for tax withholding (in shares)							(4)
Treasury stock acquired through surrender of shares for tax withholding	(82)	(82)					$ (82)
Issuance of stock through share-based compensation plans (in shares)			221
Issuance of stock through share-based compensation plans	1,483	1,483	$ 1	1,482
Share-based compensation	3,497	3,497		3,497
Cash dividends declared	(12,232)	(12,232)			(12,232)
Subsidiary dividends to non-controlling interests	(136)							(136)
Balance at end of period, common stock (in shares) at Mar. 31, 2022			290,687
Balance at end of period at Mar. 31, 2022	$ 3,126,822	3,096,123	$ 291	1,982,113	1,322,370	10,496	$ (219,147)	30,699
Balance at end of period, treasury stock (in shares) at Dec. 31, 2021							(46,151)
Balance at beginning of period, common stock (in shares) at Dec. 31, 2022	245,091		291,249
Balance at beginning of period at Dec. 31, 2022	$ 3,699,701	3,668,752	$ 291	1,996,344	1,874,644	16,699	$ (219,226)	30,949
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2023	(46,269)						(46,269)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 45,224	45,351			45,351			(127)
Other comprehensive income (loss)	(1,609)	(1,609)				(1,609)
Treasury stock acquired through surrender of shares for tax withholding (in shares)							(111)
Treasury stock acquired through surrender of shares for tax withholding	(2,823)	(2,823)					$ (2,823)
Issuance of stock through share-based compensation plans (in shares)			565
Issuance of stock through share-based compensation plans	1,524	1,524	$ 1	1,523
Share-based compensation	3,708	3,708		3,708
Cash dividends declared	(18,426)	(18,426)			(18,426)
Subsidiary dividends to non-controlling interests	$ (136)							(136)
Balance at end of period, common stock (in shares) at Mar. 31, 2023	245,545		291,814
Balance at end of period at Mar. 31, 2023	$ 3,727,163	$ 3,696,477	$ 292	$ 2,001,575	$ 1,901,569	$ 15,090	$ (222,049)	$ 30,686
Balance at end of period, treasury stock (in shares) at Dec. 31, 2022	(46,158)						(46,158)

XML 16 R7.htm IDEA: XBRL DOCUMENT

Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.075	$ 0.05

XML 17 R8.htm IDEA: XBRL DOCUMENT

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 45,224	$ 171,228
Depreciation and amortization	156,762	148,192
Other operating activities and non-cash items	(2,821)	11,061
Changes in assets and liabilities	(23,419)	(164,303)
Net cash provided by operating activities	175,746	166,178
Cash flows from investing activities:
Payments for property, plant and equipment	(98,224)	(158,154)
Proceeds from sale of property, plant and equipment	652	416
Proceeds from foreign exchange forward contracts	20,267	1,828
Payments for foreign exchange forward contracts	(20,358)	(29,803)
Payments for short-term investments	(172,409)	(125,693)
Proceeds from sale of short-term investments	21,549	4,246
Proceeds from maturities of short-term investments	92,655	66,694
Other investing activities	164	457
Net cash used in investing activities	(155,704)	(240,009)
Cash flows from financing activities:
Proceeds from revolving credit facilities	370,000	0
Payments of revolving credit facilities	(370,000)	0
Proceeds from short-term debt	11,042	18,112
Payments of short-term debt	(5,840)	(3,790)
Proceeds from issuance of long-term debt	0	150,000
Payments of long-term debt	(35,980)	(35,973)
Payments of finance lease obligations	(15,148)	(7,538)
Payments of dividends	(18,430)	(12,228)
Other financing activities	(1,850)	653
Net cash (used in) provided by financing activities	(66,206)	109,236
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	(2,943)	(7,795)
Net (decrease) increase in cash, cash equivalents and restricted cash	(49,107)	27,610
Cash, cash equivalents and restricted cash, beginning of period	962,406	831,521
Cash, cash equivalents and restricted cash, end of period	913,299	859,131
Non-cash investing and financing activities:
Property, plant and equipment included in capital expenditures payable	177,615	268,146
Right of use assets acquired through finance lease liabilities	17,513	6,438
Right of use assets acquired through operating lease liabilities	$ 3,180	$ 27,246

XML 18 R9.htm IDEA: XBRL DOCUMENT

Interim Financial Statements	3 Months Ended
Interim Financial Statements	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interim Financial Statements	Interim Financial Statements Basis of Presentation. The Consolidated Financial Statements and related disclosures as of March 31, 2023, and for the three months ended March 31, 2023 and 2022, contained in this Form 10-Q (the “Consolidated Financial Statements”) are unaudited, pursuant to the rules and regulations of the SEC. The December 31, 2022 Consolidated Balance Sheet data contained in this Form 10-Q 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 financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the Consolidated Financial Statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of the results for the interim periods and should be read in conjunction with the financial statements included in the 2022 Form 10-K. The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the results to be expected for the full year ending December 31, 2023. Unless the context otherwise requires, all references to “Amkor,” “we,” “us” or “our” are to Amkor Technology, Inc. and its wholly and majority-owned subsidiaries. Use of Estimates. The Consolidated Financial Statements have been prepared in conformity with U.S. GAAP, using management’s best estimates and judgments where appropriate. These estimates and judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The estimates and judgments will also affect the reported amounts for certain revenues and expenses during the reporting period. Actual results could differ materially from these estimates and judgments, as a result of, for example, any worsening of the global business and economic environment. Goodwill. The balance of goodwill in the Consolidated Balance Sheets contained in this Form 10-Q reflects adjustments for foreign currency translation. Unbilled Receivables. Total unbilled receivables as of March 31, 2023 and December 31, 2022 were $248.9 million and $301.7 million, respectively. Contract Liabilities. Contract liabilities were $157.1 million and $170.6 million as of March 31, 2023 and December 31, 2022, respectively. As of March 31, 2023 and December 31, 2022, the short-term portions of the liabilities were $80.6 million and $81.5 million, respectively. The remainder of the March 31, 2023 contract liability balance is expected to be recognized in revenue over the next 1-5 years. Revenue recognized during the three months ended March 31, 2023 and 2022 that was included in the contract liabilities balance at the beginning of the period was $21.5 million and $28.9 million, respectively.

XML 19 R10.htm IDEA: XBRL DOCUMENT

Net Sales by Product Group and End Market

3 Months Ended

Mar. 31, 2023

Net Sales by Product Group and End Market

The following table presents our net sales by product group.


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Advanced products (1)	$	1,067,377	$	1,156,508
Mainstream products (2)	404,162		440,308
Total net sales	$	1,471,539	$	1,596,816

(1) Advanced products include flip chip, memory and wafer-level processing and related test services.

(2) Mainstream products include all other wirebond packaging and related test services.

Net sales by end market consist of the following:


	For the Three Months Ended March 31,
	2023		2022
Communications (smartphones, tablets)	45	%	41	%
Automotive, industrial and other (ADAS, electrification, infotainment, safety)	26	%	21	%
Consumer (AR & gaming, connected home, home electronics, wearables)	12	%	19	%
Computing (data center, infrastructure, PC/laptop, storage)	17	%	19	%
Total net sales	100	%	100	%

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 606
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-Paragraph 12
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045

Other Income and Expenses [Abstract]

XML 20 R11.htm IDEA: XBRL DOCUMENT

Other Income and Expense

3 Months Ended

Mar. 31, 2023

Other Income and Expense

Other income and expense consist of the following:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Interest income	$	(10,433)	$	(603)
Foreign currency loss (gain), net	6,763		(4,301)
Loss on debt retirement	—		97


Other	118		(289)
Total other (income) expense, net	$	(3,552)	$	(5,096)

XML 21 R12.htm IDEA: XBRL DOCUMENT

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense of $10.9 million for the three months ended March 31, 2023 reflects income taxes, foreign withholding taxes and minimum taxes. We monitor on an ongoing basis our ability to utilize our deferred tax assets and whether there is a need for a related valuation allowance. In evaluating our ability to recover our deferred tax assets in the jurisdictions from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies and recent results of operations. We maintain a valuation allowance on certain U.S. and foreign deferred tax assets. Such valuation allowances are released as the related tax benefits are realized or when sufficient evidence exists to conclude that it is more likely than not that the deferred tax assets will be realized. Unrecognized tax benefits represent reserves for potential tax deficiencies or reductions in tax benefits that could result from federal, state or foreign tax audits. Gross unrecognized tax benefits increased from $33.3 million as of December 31, 2022 to $33.9 million as of March 31, 2023. All of our unrecognized tax benefits would reduce our effective tax rate if recognized. Our unrecognized tax benefits are subject to change for effective settlement of examinations, changes in the recognition threshold of tax positions, the expiration of statutes of limitations and other factors. We have tax returns that are open to examination in various jurisdictions for tax years 2012-2022. The open years contain matters that could be subject to differing interpretations of applicable tax laws and regulations related to the amount and/or timing of income, deductions and tax credits. There can be no assurance that the outcome of the examinations will be favorable. In certain circumstances where we elect to appeal the results of an examination, we may be required to make tax assessment payments to proceed with the administrative appeal process.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Subparagraph (b)
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI https://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Accumulated Other Comprehensive Income (Loss)

XML 22 R13.htm IDEA: XBRL DOCUMENT

Earnings Per Share

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Earnings Per Share

The following table summarizes the computation of basic and diluted EPS:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands, except per share data)
Net income attributable to Amkor common stockholders	$	45,351	$	170,663




Weighted-average number of common shares outstanding - basic	245,330		244,403
Effect of dilutive securities:
Share-based awards	1,757		1,597
Weighted-average number of common shares outstanding - diluted	247,087		246,000
Net income attributable to Amkor per common share:
Basic	$	0.18	$	0.70
Diluted	0.18		0.69

There were no anti-dilutive shares for the three months ended March 31, 2023 and 2022.

XML 23 R14.htm IDEA: XBRL DOCUMENT

Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Changes in accumulated other comprehensive income (loss), net of tax, consist of the following:


	Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1)		Defined Benefit Pension (2)		Foreign Currency Translation		Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2022	$	(1,573)	$	14,220	$	4,052	$	16,699
Other comprehensive income (loss) before reclassifications	645		—		(2,113)		(1,468)
Amounts reclassified from accumulated other comprehensive income (loss)	(44)		(97)		—		(141)
Other comprehensive income (loss)	601		(97)		(2,113)		(1,609)
Accumulated other comprehensive income (loss) at March 31, 2023	$	(972)	$	14,123	$	1,939	$	15,090


	Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1)		Defined Benefit Pension (2)		Foreign Currency Translation		Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2021	$	(348)	$	5,616	$	14,710	$	19,978
Other comprehensive income (loss) before reclassifications	(1,087)		—		(8,409)		(9,496)
Amounts reclassified from accumulated other comprehensive income (loss)	10		4		—		14
Other comprehensive income (loss)	(1,077)		4		(8,409)		(9,482)
Accumulated other comprehensive income (loss) at March 31, 2022	$	(1,425)	$	5,620	$	6,301	$	10,496

(1) Amounts reclassified out of accumulated other comprehensive income (loss) are included as other (income) expense, net (Note 3).

(2) Amounts reclassified out of accumulated other comprehensive income (loss) are included as a component of net periodic pension cost (Note 12) or other (income) expense, net (Note 3).

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 505
-URI https://asc.fasb.org/topic&trid=2208762

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Name Accounting Standards Codification
-Topic 505
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-Subparagraph (g)
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126731327&loc=SL126733271-114008

Investments, Debt and Equity Securities [Abstract]

XML 24 R15.htm IDEA: XBRL DOCUMENT

Investments

3 Months Ended

Mar. 31, 2023

Investments

All of our available-for-sale debt investments as of March 31, 2023 are available to fund current operations and are recorded at fair value (Note 14).

The following table summarizes our cash equivalents and available-for-sale debt investments:


	March 31, 2023
									Fair Value Level
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses (1)		Total Fair Value		Level 1		Level 2
	(In thousands)
Cash equivalents
Asset-backed securities	$	849	$	—	$	—	$	849	$	—	$	849

Commercial paper	26,801		—		—		26,801		—		26,801
Corporate bonds	12,519		—		(5)		12,514		—		12,514

Money market funds	64,433		—		—		64,433		64,433		—

Municipal bonds	1,010		—		—		1,010		—		1,010
U.S. government agency bonds	1,494		—		—		1,494		—		1,494
U.S. government bonds	15,917		3		—		15,920		15,920		—
Variable rate demand notes	1,004		—		—		1,004		—		1,004
Total cash equivalents (2)	124,027		3		(5)		124,025		80,353		43,672

Short-term investments
Asset-backed securities	24,201		8		(79)		24,130		—		24,130
Certificate of deposits	16,096		—		—		16,096		16,096		—
Commercial paper	37,079		—		—		37,079		—		37,079
Corporate bonds	226,134		54		(1,073)		225,115		—		225,115
Foreign government bonds	2,086		—		—		2,086		—		2,086
Mortgage-backed securities	381		—		(1)		380		—		380
Municipal bonds	363		—		(1)		362		—		362
U.S. government agency bonds	6,385		6		(7)		6,384		—		6,384
U.S. government bonds	25,646		47		(4)		25,689		25,689		—

Total short-term investments	338,371		115		(1,165)		337,321		41,785		295,536
Total	$	462,398	$	118	$	(1,170)	$	461,346	$	122,138	$	339,208


	December 31, 2022
									Fair Value Level
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses (1)		Total Fair Value		Level 1		Level 2
	(In thousands)
Cash equivalents
Asset-backed securities	$	25	$	—	$	—	$	25	$	—	$	25

Commercial paper	69,101		—		—		69,101		—		69,101

Money market funds	97,650		—		—		97,650		97,650		—

Municipal bonds	1,001		—		—		1,001		—		1,001
U.S. government agency bonds	16,982		3		—		16,985		—		16,985
U.S. government bonds	10,767		1		—		10,768		10,768		—
Total cash equivalents	195,526		4		—		195,530		108,418		87,112

Short-term investments
Asset-backed securities	25,677		7		(134)		25,550		—		25,550
Certificate of deposits	17,362		—		—		17,362		17,362		—
Commercial paper	27,866		—		—		27,866		—		27,866
Corporate bonds	198,868		7		(1,529)		197,346		—		197,346
Foreign government bonds	996		—		(4)		992		—		992
Mortgage-backed securities	696		—		(2)		694		—		694
Municipal bonds	364		—		(2)		362		—		362
U.S. government agency bonds	735		—		(1)		734		—		734
U.S. government bonds	6,704		1		(20)		6,685		6,685		—

Total short-term investments	279,268		15		(1,692)		277,591		24,047		253,544
Total	$	474,794	$	19	$	(1,692)	$	473,121	$	132,465	$	340,656

(2)For three months ended March 31, 2023 and 2022, we sold cash equivalent investments for proceeds of $13.0 million and $0.9 million, respectively, and realized no gain or loss on such sales.

The following table summarizes the contractual maturities of our cash equivalents and available-for-sale debt investments as of March 31, 2023:


	Amortized Cost		Fair Value
	(In thousands)
Within 1 year	$	350,678	$	349,880
After 1 year through 5 years	109,987		109,734
After 5 years through 10 years	728		729
After 10 years	1,005		1,003
Total	$	462,398	$	461,346

Actual maturities can differ from contractual maturities due to various factors including the issuers may have the right to call or prepay obligations without call or prepayment penalties.

XML 25 R16.htm IDEA: XBRL DOCUMENT

Factoring of Accounts Receivable	3 Months Ended
Factoring of Accounts Receivable	Mar. 31, 2023
Factoring of Accounts Receivable [Abstract]
Factoring of Accounts Receivable	Factoring of Accounts Receivable For certain accounts receivable, we use non-recourse factoring arrangements with third-party financial institutions to manage our working capital and cash flows. Under these arrangements, we sell receivables to a financial institution for cash at a discount to the face amount. As part of the factoring arrangements, we perform certain collection and administrative functions for the receivables sold. For the three months ended March 31, 2023 and 2022, we sold receivables totaling $78.0 million and $92.2 million, respectively, net of discounts and fees of $0.2 million for each period.

XML 26 R17.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment

3 Months Ended

Mar. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Plant And Equipment

Property, Plant and Equipment

Property, plant and equipment consist of the following:


	March 31, 2023		December 31, 2022
	(In thousands)
Land	$	214,212	$	214,763
Buildings and improvements	1,822,847		1,817,135
Machinery and equipment	6,808,824		6,757,652
Finance lease assets	182,256		165,122
Furniture, fixtures and other equipment	23,487		23,240
Software and computer equipment	244,006		240,610
Construction in progress	249,018		152,809
Total property, plant and equipment	9,544,650		9,371,331
Accumulated depreciation and amortization	(6,359,372)		(6,235,717)
Total property, plant and equipment, net	$	3,185,278	$	3,135,614

The following table summarizes our depreciation expense:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Depreciation expense	$	156,614	$	148,040

XML 27 R18.htm IDEA: XBRL DOCUMENT

Accrued Expenses

3 Months Ended

Mar. 31, 2023

Payables and Accruals [Abstract]

Accrued Expenses

Accrued expenses consist of the following:


	March 31, 2023		December 31, 2022
	(In thousands)
Payroll and benefits	$	99,037	$	137,445

Deferred revenue and customer advances	80,558		81,459
Income taxes payable	60,831		50,685
Short-term finance lease liabilities	60,813		56,570
Accrued severance plan obligations	7,107		7,422
Accrued interest	2,443		10,878
Other accrued expenses	50,385		57,382
Total accrued expenses	$	361,174	$	401,841

XML 28 R19.htm IDEA: XBRL DOCUMENT

Debt

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Debt

Following is a summary of short-term borrowings and long-term debt:


	March 31, 2023		December 31, 2022
	(In thousands)
Debt of Amkor Technology, Inc.:
Senior notes:
6.625% Senior notes, due September 2027	$	525,000	$	525,000
Debt of subsidiaries:
Amkor Technology Korea, Inc.:
Term loan, fixed rate at 1.85%, due April 2024 (1)	—		—
Term loan, fixed rate at 2.12%, due December 2028	200,000		200,000
Amkor Technology Japan, Inc.:
Short-term term loans, variable rate (2)	9,235		4,042
Term loan, fixed rate at 1.30%, due July 2023	19,569		29,744
Term loan, fixed rate at 1.35%, due December 2024	75,079		86,943
Term loan, fixed rate at 1.20%, due December 2025	45,123		49,878
Term loan, fixed rate at 1.23%, due December 2026	73,950		79,927
Term loan, fixed rate at 1.59%, due December 2027	112,261		119,738
Amkor Assembly & Test (Shanghai) Co., Ltd.:
Term loans, LIBOR plus 1.10%, weighted average of 6.25% as of March 31, 2023, due March 2024	46,000		46,000
Term loans, LIBOR plus 0.80%, weighted average of 5.74% as of March 31, 2023, due June 2025	39,000		39,000
Term loans, LIBOR plus 0.75%, weighted average of 5.81% as of March 31, 2023, due 2025	59,000		59,500
Other:
Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) (3)	—		—
$600.0 million senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) (4)	—		—
	1,204,217		1,239,772
Less: Unamortized discount and deferred debt costs, net	(6,751)		(7,438)
Less: Short-term borrowings and current portion of long-term debt	(137,469)		(143,813)
Long-term debt	$	1,059,997	$	1,088,521

We were in compliance with all debt covenants at March 31, 2023.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 470
-URI https://asc.fasb.org/topic&trid=2208564

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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (SX 210.4-08(c))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1C
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1C
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1E
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1I
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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-Paragraph 1B
-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

XML 29 R20.htm IDEA: XBRL DOCUMENT

Pension Plans

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Pension Plans

Foreign Defined Benefit Pension Plans


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Service cost	$	3,828	$	5,418
Interest cost	1,603		1,258
Expected return on plan assets	(1,311)		(1,493)

Recognized actuarial loss	(98)		13
Net periodic pension cost	$	4,022	$	5,196

The components of net periodic pension cost other than the service cost component are included in other (income) expense, net in our Consolidated Statements of Income.

Defined Contribution Pension Plans

We sponsor defined contribution pension plans in Korea, Malaysia, Taiwan and the U.S. The following table summarizes our defined contribution expense:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Defined contribution expense	$	8,796	$	7,948

The entire disclosure for retirement benefits.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section S99
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (o)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (p)
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI https://asc.fasb.org/topic&trid=2235017

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 60
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(03)
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (q)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (r)(1)
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iii)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (l)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (r)(2)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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Derivatives

3 Months Ended

Mar. 31, 2023

Derivatives

As of March 31, 2023 and December 31, 2022, our foreign exchange forward contracts consisted of the following:


	March 31, 2023					December 31, 2022
	Notional Value		Fair Value (Level 2)		Balance Sheet Location	Notional Value		Fair Value (Level 2)		Balance Sheet Location
	(In thousands)
Japanese yen	$	281,038	$	(2,665)	Accrued expenses	$	330,179	$	6,284	Other current assets
Korean won	75,954		(401)		Accrued expenses	65,927		333		Other current assets
Philippine peso	6,523		(21)		Accrued expenses	3,085		(6)		Accrued expenses
Singapore dollar	34,522		(46)		Accrued expenses	—		—		N/A
Taiwan dollar	25,855		(92)		Accrued expenses	28,763		(57)		Accrued expenses
Total forward contracts	$	423,892	$	(3,225)		$	427,954	$	6,554

XML 31 R22.htm IDEA: XBRL DOCUMENT

Fair Value Measurements

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Our derivative financial instruments are valued using quoted market prices for similar assets. Counterparties to these derivative contracts are highly rated financial institutions.

We also measure certain assets and liabilities, including property, plant and equipment and goodwill, at fair value on a nonrecurring basis.

We measure the fair value of our debt for disclosure purposes. The following table presents the fair value of our debt:


	March 31, 2023				December 31, 2022
	Fair Value		Carrying Value		Fair Value		Carrying Value
	(In thousands)
Senior notes (Level 1)	$	527,741	$	521,290	$	523,016	$	521,114
Revolving credit facilities and term loans (Level 2)	657,081		676,176		686,728		711,220
Total debt	$	1,184,822	$	1,197,466	$	1,209,744	$	1,232,334

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

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Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We generally warrant that our services will be performed in a professional and workmanlike manner and in compliance with our customers’ specifications. We accrue costs for known warranty issues. Historically, our warranty costs have been immaterial. Legal Proceedings We are involved in claims and legal proceedings and may become involved in other legal matters arising in the ordinary course of our business. We evaluate these claims and legal matters on a case-by-case basis to determine the impact, if any, on our business, liquidity, results of operations, financial condition or cash flows. Although the outcome of these matters is uncertain, we believe that the ultimate outcome of these claims and proceedings, individually and in the aggregate, will not have a material adverse impact to us. Our evaluation of the potential impact of these claims and legal proceedings on our business, liquidity, results of operations, financial condition or cash flows could change in the future. In accordance with the accounting guidance for loss contingencies, including legal proceedings, lawsuits, pending claims and other legal matters, we accrue for a loss contingency when we conclude that the likelihood of a loss is probable and the amount of the loss can be reasonably estimated. We adjust our accruals from time to time as we receive additional information, but the loss we incur may be significantly greater than or less than the amount we have accrued. We disclose loss contingencies if we believe they are material and there is at least a reasonable possibility that a loss has been incurred. Attorney fees related to legal matters are expensed as incurred. Lease Commitments As of March 31, 2023 we have entered into additional lease agreements that have not yet commenced of approximately $10 million.

XML 33 R24.htm IDEA: XBRL DOCUMENT

Interim Financial Statements (Policies)	3 Months Ended
Interim Financial Statements (Policies)	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation. The Consolidated Financial Statements and related disclosures as of March 31, 2023, and for the three months ended March 31, 2023 and 2022, contained in this Form 10-Q (the “Consolidated Financial Statements”) are unaudited, pursuant to the rules and regulations of the SEC. The December 31, 2022 Consolidated Balance Sheet data contained in this Form 10-Q 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 financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the Consolidated Financial Statements include all adjustments (consisting only of normal recurring adjustments) necessary for the fair statement of the results for the interim periods and should be read in conjunction with the financial statements included in the 2022 Form 10-K. The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the results to be expected for the full year ending December 31, 2023. Unless the context otherwise requires, all references to “Amkor,” “we,” “us” or “our” are to Amkor Technology, Inc. and its wholly and majority-owned subsidiaries.
Use of Estimates	Use of Estimates. The Consolidated Financial Statements have been prepared in conformity with U.S. GAAP, using management’s best estimates and judgments where appropriate. These estimates and judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The estimates and judgments will also affect the reported amounts for certain revenues and expenses during the reporting period. Actual results could differ materially from these estimates and judgments, as a result of, for example, any worsening of the global business and economic environment.
Goodwill	Goodwill. The balance of goodwill in the Consolidated Balance Sheets contained in this Form 10-Q reflects adjustments for foreign currency translation.
Income Taxes	We monitor on an ongoing basis our ability to utilize our deferred tax assets and whether there is a need for a related valuation allowance. In evaluating our ability to recover our deferred tax assets in the jurisdictions from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies and recent results of operations. We maintain a valuation allowance on certain U.S. and foreign deferred tax assets. Such valuation allowances are released as the related tax benefits are realized or when sufficient evidence exists to conclude that it is more likely than not that the deferred tax assets will be realized.
Commitments and Contingencies	In accordance with the accounting guidance for loss contingencies, including legal proceedings, lawsuits, pending claims and other legal matters, we accrue for a loss contingency when we conclude that the likelihood of a loss is probable and the amount of the loss can be reasonably estimated. We adjust our accruals from time to time as we receive additional information, but the loss we incur may be significantly greater than or less than the amount we have accrued. We disclose loss contingencies if we believe they are material and there is at least a reasonable possibility that a loss has been incurred. Attorney fees related to legal matters are expensed as incurred.

Revenue from Contract with Customer [Abstract]

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References + Details

XML 34 R25.htm IDEA: XBRL DOCUMENT

Net Sales by Product Group and End Market (Tables)

3 Months Ended

Mar. 31, 2023

Schedule of net sales by product group and end market

The following table presents our net sales by product group.


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Advanced products (1)	$	1,067,377	$	1,156,508
Mainstream products (2)	404,162		440,308
Total net sales	$	1,471,539	$	1,596,816

(1) Advanced products include flip chip, memory and wafer-level processing and related test services.

(2) Mainstream products include all other wirebond packaging and related test services.

Net sales by end market consist of the following:


	For the Three Months Ended March 31,
	2023		2022
Communications (smartphones, tablets)	45	%	41	%
Automotive, industrial and other (ADAS, electrification, infotainment, safety)	26	%	21	%
Consumer (AR & gaming, connected home, home electronics, wearables)	12	%	19	%
Computing (data center, infrastructure, PC/laptop, storage)	17	%	19	%
Total net sales	100	%	100	%

XML 35 R26.htm IDEA: XBRL DOCUMENT

Other Income and Expense (Tables)

3 Months Ended

Mar. 31, 2023

Other Income and Expenses [Abstract]

Schedule of other (income) expense

Other income and expense consist of the following:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Interest income	$	(10,433)	$	(603)
Foreign currency loss (gain), net	6,763		(4,301)
Loss on debt retirement	—		97


Other	118		(289)
Total other (income) expense, net	$	(3,552)	$	(5,096)

XML 36 R27.htm IDEA: XBRL DOCUMENT

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted earnings per share

The following table summarizes the computation of basic and diluted EPS:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands, except per share data)
Net income attributable to Amkor common stockholders	$	45,351	$	170,663




Weighted-average number of common shares outstanding - basic	245,330		244,403
Effect of dilutive securities:
Share-based awards	1,757		1,597
Weighted-average number of common shares outstanding - diluted	247,087		246,000
Net income attributable to Amkor per common share:
Basic	$	0.18	$	0.70
Diluted	0.18		0.69

XML 37 R28.htm IDEA: XBRL DOCUMENT

Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Schedule of changes in accumulated other comprehensive income (loss), net of tax

Changes in accumulated other comprehensive income (loss), net of tax, consist of the following:


	Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1)		Defined Benefit Pension (2)		Foreign Currency Translation		Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2022	$	(1,573)	$	14,220	$	4,052	$	16,699
Other comprehensive income (loss) before reclassifications	645		—		(2,113)		(1,468)
Amounts reclassified from accumulated other comprehensive income (loss)	(44)		(97)		—		(141)
Other comprehensive income (loss)	601		(97)		(2,113)		(1,609)
Accumulated other comprehensive income (loss) at March 31, 2023	$	(972)	$	14,123	$	1,939	$	15,090


	Unrealized Gains (Losses) on Available-for-Sale Debt Investments (1)		Defined Benefit Pension (2)		Foreign Currency Translation		Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2021	$	(348)	$	5,616	$	14,710	$	19,978
Other comprehensive income (loss) before reclassifications	(1,087)		—		(8,409)		(9,496)
Amounts reclassified from accumulated other comprehensive income (loss)	10		4		—		14
Other comprehensive income (loss)	(1,077)		4		(8,409)		(9,482)
Accumulated other comprehensive income (loss) at March 31, 2022	$	(1,425)	$	5,620	$	6,301	$	10,496

(1) Amounts reclassified out of accumulated other comprehensive income (loss) are included as other (income) expense, net (Note 3).

(2) Amounts reclassified out of accumulated other comprehensive income (loss) are included as a component of net periodic pension cost (Note 12) or other (income) expense, net (Note 3).

XML 38 R29.htm IDEA: XBRL DOCUMENT

Investments (Tables)

3 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of debt securities available-for-sale

The following table summarizes our cash equivalents and available-for-sale debt investments:


	March 31, 2023
									Fair Value Level
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses (1)		Total Fair Value		Level 1		Level 2
	(In thousands)
Cash equivalents
Asset-backed securities	$	849	$	—	$	—	$	849	$	—	$	849

Commercial paper	26,801		—		—		26,801		—		26,801
Corporate bonds	12,519		—		(5)		12,514		—		12,514

Money market funds	64,433		—		—		64,433		64,433		—

Municipal bonds	1,010		—		—		1,010		—		1,010
U.S. government agency bonds	1,494		—		—		1,494		—		1,494
U.S. government bonds	15,917		3		—		15,920		15,920		—
Variable rate demand notes	1,004		—		—		1,004		—		1,004
Total cash equivalents (2)	124,027		3		(5)		124,025		80,353		43,672

Short-term investments
Asset-backed securities	24,201		8		(79)		24,130		—		24,130
Certificate of deposits	16,096		—		—		16,096		16,096		—
Commercial paper	37,079		—		—		37,079		—		37,079
Corporate bonds	226,134		54		(1,073)		225,115		—		225,115
Foreign government bonds	2,086		—		—		2,086		—		2,086
Mortgage-backed securities	381		—		(1)		380		—		380
Municipal bonds	363		—		(1)		362		—		362
U.S. government agency bonds	6,385		6		(7)		6,384		—		6,384
U.S. government bonds	25,646		47		(4)		25,689		25,689		—

Total short-term investments	338,371		115		(1,165)		337,321		41,785		295,536
Total	$	462,398	$	118	$	(1,170)	$	461,346	$	122,138	$	339,208


	December 31, 2022
									Fair Value Level
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses (1)		Total Fair Value		Level 1		Level 2
	(In thousands)
Cash equivalents
Asset-backed securities	$	25	$	—	$	—	$	25	$	—	$	25

Commercial paper	69,101		—		—		69,101		—		69,101

Money market funds	97,650		—		—		97,650		97,650		—

Municipal bonds	1,001		—		—		1,001		—		1,001
U.S. government agency bonds	16,982		3		—		16,985		—		16,985
U.S. government bonds	10,767		1		—		10,768		10,768		—
Total cash equivalents	195,526		4		—		195,530		108,418		87,112

Short-term investments
Asset-backed securities	25,677		7		(134)		25,550		—		25,550
Certificate of deposits	17,362		—		—		17,362		17,362		—
Commercial paper	27,866		—		—		27,866		—		27,866
Corporate bonds	198,868		7		(1,529)		197,346		—		197,346
Foreign government bonds	996		—		(4)		992		—		992
Mortgage-backed securities	696		—		(2)		694		—		694
Municipal bonds	364		—		(2)		362		—		362
U.S. government agency bonds	735		—		(1)		734		—		734
U.S. government bonds	6,704		1		(20)		6,685		6,685		—

Total short-term investments	279,268		15		(1,692)		277,591		24,047		253,544
Total	$	474,794	$	19	$	(1,692)	$	473,121	$	132,465	$	340,656

(2)For three months ended March 31, 2023 and 2022, we sold cash equivalent investments for proceeds of $13.0 million and $0.9 million, respectively, and realized no gain or loss on such sales.

The following table summarizes the contractual maturities of our cash equivalents and available-for-sale debt investments as of March 31, 2023:


	Amortized Cost		Fair Value
	(In thousands)
Within 1 year	$	350,678	$	349,880
After 1 year through 5 years	109,987		109,734
After 5 years through 10 years	728		729
After 10 years	1,005		1,003
Total	$	462,398	$	461,346

XML 39 R30.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment and depreciation expense

Property, plant and equipment consist of the following:


	March 31, 2023		December 31, 2022
	(In thousands)
Land	$	214,212	$	214,763
Buildings and improvements	1,822,847		1,817,135
Machinery and equipment	6,808,824		6,757,652
Finance lease assets	182,256		165,122
Furniture, fixtures and other equipment	23,487		23,240
Software and computer equipment	244,006		240,610
Construction in progress	249,018		152,809
Total property, plant and equipment	9,544,650		9,371,331
Accumulated depreciation and amortization	(6,359,372)		(6,235,717)
Total property, plant and equipment, net	$	3,185,278	$	3,135,614

The following table summarizes our depreciation expense:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Depreciation expense	$	156,614	$	148,040

XML 40 R31.htm IDEA: XBRL DOCUMENT

Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2023

Payables and Accruals [Abstract]

Schedule of accrued expenses

Accrued expenses consist of the following:


	March 31, 2023		December 31, 2022
	(In thousands)
Payroll and benefits	$	99,037	$	137,445

Deferred revenue and customer advances	80,558		81,459
Income taxes payable	60,831		50,685
Short-term finance lease liabilities	60,813		56,570
Accrued severance plan obligations	7,107		7,422
Accrued interest	2,443		10,878
Other accrued expenses	50,385		57,382
Total accrued expenses	$	361,174	$	401,841

XML 41 R32.htm IDEA: XBRL DOCUMENT

Debt (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Schedule of short-term borrowings and long-term debt

Following is a summary of short-term borrowings and long-term debt:


	March 31, 2023		December 31, 2022
	(In thousands)
Debt of Amkor Technology, Inc.:
Senior notes:
6.625% Senior notes, due September 2027	$	525,000	$	525,000
Debt of subsidiaries:
Amkor Technology Korea, Inc.:
Term loan, fixed rate at 1.85%, due April 2024 (1)	—		—
Term loan, fixed rate at 2.12%, due December 2028	200,000		200,000
Amkor Technology Japan, Inc.:
Short-term term loans, variable rate (2)	9,235		4,042
Term loan, fixed rate at 1.30%, due July 2023	19,569		29,744
Term loan, fixed rate at 1.35%, due December 2024	75,079		86,943
Term loan, fixed rate at 1.20%, due December 2025	45,123		49,878
Term loan, fixed rate at 1.23%, due December 2026	73,950		79,927
Term loan, fixed rate at 1.59%, due December 2027	112,261		119,738
Amkor Assembly & Test (Shanghai) Co., Ltd.:
Term loans, LIBOR plus 1.10%, weighted average of 6.25% as of March 31, 2023, due March 2024	46,000		46,000
Term loans, LIBOR plus 0.80%, weighted average of 5.74% as of March 31, 2023, due June 2025	39,000		39,000
Term loans, LIBOR plus 0.75%, weighted average of 5.81% as of March 31, 2023, due 2025	59,000		59,500
Other:
Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) (3)	—		—
$600.0 million senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) (4)	—		—
	1,204,217		1,239,772
Less: Unamortized discount and deferred debt costs, net	(6,751)		(7,438)
Less: Short-term borrowings and current portion of long-term debt	(137,469)		(143,813)
Long-term debt	$	1,059,997	$	1,088,521

(3)In March 2022, Amkor Technology Taiwan Ltd. (“ATT”) amended an existing revolving credit facility to reduce availability from $36.0 million to $15.0 million. As of March 31, 2023, $15.0 million was available for future borrowings under such credit facility. (4)In March 2022, Amkor Technology Singapore Holdings Pte. Ltd. (“ATSH”) entered into a $600.0 million senior revolving credit facility (the “2022 Singapore Revolver”), which is guaranteed by Amkor Technology, Inc., ATT and Amkor Advanced Technology, Inc. (“AATT”). The maximum borrowing capacity under the 2022 Singapore Revolver is limited to a base amount equal to the lesser of: (1) $600.0 million; and (2) $250.0 million plus a variable amount equal to 37.5% of our consolidated accounts receivable balance. As of March 31, 2023, $600.0 million was available for future borrowings under the 2022 Singapore Revolver.

XML 42 R33.htm IDEA: XBRL DOCUMENT

Pension Plans (Tables)

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Schedule of components of net periodic pension cost

The components of net periodic pension cost for these defined benefit pension plans are as follows:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Service cost	$	3,828	$	5,418
Interest cost	1,603		1,258
Expected return on plan assets	(1,311)		(1,493)

Recognized actuarial loss	(98)		13
Net periodic pension cost	$	4,022	$	5,196

Schedule of defined contribution expense

The following table summarizes our defined contribution expense:


	For the Three Months Ended March 31,
	2023		2022
	(In thousands)
Defined contribution expense	$	8,796	$	7,948

XML 43 R34.htm IDEA: XBRL DOCUMENT

Derivatives (Tables)

3 Months Ended

Mar. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of air value of derivative instruments in statement of financial position

As of March 31, 2023 and December 31, 2022, our foreign exchange forward contracts consisted of the following:


	March 31, 2023					December 31, 2022
	Notional Value		Fair Value (Level 2)		Balance Sheet Location	Notional Value		Fair Value (Level 2)		Balance Sheet Location
	(In thousands)
Japanese yen	$	281,038	$	(2,665)	Accrued expenses	$	330,179	$	6,284	Other current assets
Korean won	75,954		(401)		Accrued expenses	65,927		333		Other current assets
Philippine peso	6,523		(21)		Accrued expenses	3,085		(6)		Accrued expenses
Singapore dollar	34,522		(46)		Accrued expenses	—		—		N/A
Taiwan dollar	25,855		(92)		Accrued expenses	28,763		(57)		Accrued expenses
Total forward contracts	$	423,892	$	(3,225)		$	427,954	$	6,554

XML 44 R35.htm IDEA: XBRL DOCUMENT

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of fair value of financial instruments that are not recorded at fair value on recurring basis

The following table presents the fair value of our debt:


	March 31, 2023				December 31, 2022
	Fair Value		Carrying Value		Fair Value		Carrying Value
	(In thousands)
Senior notes (Level 1)	$	527,741	$	521,290	$	523,016	$	521,114
Revolving credit facilities and term loans (Level 2)	657,081		676,176		686,728		711,220
Total debt	$	1,184,822	$	1,197,466	$	1,209,744	$	1,232,334

XML 45 R36.htm IDEA: XBRL DOCUMENT

Interim Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unbilled receivables	$ 248,900		$ 301,700
Contract liabilities	157,100		170,600
Deferred revenue and customer advances	80,558		$ 81,459
Revenue recognized	$ 21,500	$ 28,900
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected timing of satisfaction, period	1 year
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected timing of satisfaction, period	5 years

XML 46 R37.htm IDEA: XBRL DOCUMENT

Net Sales by Product Group and End Market - Product Group (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Total net sales	$ 1,471,539	$ 1,596,816
Advanced products
Disaggregation of Revenue [Line Items]
Total net sales	1,067,377	1,156,508
Mainstream products
Disaggregation of Revenue [Line Items]
Total net sales	$ 404,162	$ 440,308

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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XML 47 R38.htm IDEA: XBRL DOCUMENT

Net Sales by Product Group and End Market - End Market (Details)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%
Net sales \| Distribution Channel Concentration Risk \| Communications (smartphones, tablets)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	45.00%	41.00%
Net sales \| Distribution Channel Concentration Risk \| Automotive, industrial and other (ADAS, electrification, infotainment, safety)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	26.00%	21.00%
Net sales \| Distribution Channel Concentration Risk \| Consumer (AR & gaming, connected home, home electronics, wearables)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	12.00%	19.00%
Net sales \| Distribution Channel Concentration Risk \| Computing (data center, infrastructure, PC/laptop, storage)
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	17.00%	19.00%

XML 48 R39.htm IDEA: XBRL DOCUMENT

Other Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended
Other Income and Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Other Income and Expenses [Abstract]
Interest income	$ (10,433)	$ (603)
Foreign currency loss (gain), net	6,763	(4,301)
Loss on debt retirement	0	97
Other	118	(289)
Total other (income) expense, net	$ (3,552)	$ (5,096)

XML 49 R40.htm IDEA: XBRL DOCUMENT

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income tax expense	$ 10,864	$ 29,728
Gross unrecognized tax benefits	$ 33,900		$ 33,300

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

XML 50 R41.htm IDEA: XBRL DOCUMENT

Earnings Per Share - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income attributable to Amkor common stockholders, basic	$ 45,351	$ 170,663
Net income attributable to Amkor common stockholders, diluted	$ 45,351	$ 170,663
Weighted-average number of common shares outstanding - basic (in shares)	245,330	244,403
Effect of dilutive securities:
Share-based awards (in shares)	1,757	1,597
Weighted-average number of common shares outstanding - diluted (in shares)	247,087	246,000
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.18	$ 0.70
Diluted (in dollars per share)	$ 0.18	$ 0.69

XML 51 R42.htm IDEA: XBRL DOCUMENT

Earnings Per Share - Narrative (Details) - shares	3 Months Ended
Earnings Per Share - Narrative (Details) - shares	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Anti-dilutive shares (in shares)	0	0

XML 52 R43.htm IDEA: XBRL DOCUMENT

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 3,699,701	$ 2,972,546
Other comprehensive income (loss) before reclassifications	(1,468)	(9,496)
Amounts reclassified from accumulated other comprehensive income (loss)	(141)	14
Total other comprehensive income (loss)	(1,609)	(9,482)
Balance at end of period	3,727,163	3,126,822
Unrealized Gains (Losses) on Available-for-Sale Debt Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(1,573)	(348)
Other comprehensive income (loss) before reclassifications	645	(1,087)
Amounts reclassified from accumulated other comprehensive income (loss)	(44)	10
Total other comprehensive income (loss)	601	(1,077)
Balance at end of period	(972)	(1,425)
Defined Benefit Pension
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	14,220	5,616
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(97)	4
Total other comprehensive income (loss)	(97)	4
Balance at end of period	14,123	5,620
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	4,052	14,710
Other comprehensive income (loss) before reclassifications	(2,113)	(8,409)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Total other comprehensive income (loss)	(2,113)	(8,409)
Balance at end of period	1,939	6,301
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	16,699	19,978
Total other comprehensive income (loss)	(1,609)	(9,482)
Balance at end of period	$ 15,090	$ 10,496

Amount after tax and reclassification adjustments of other comprehensive income (loss).

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