N-CSR 1 c107584_ncsr.htm CERTIFIED ANNUAL SHAREHOLDER REPORT

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act File Number: 811-03691

LORD ABBETT MID CAP STOCK FUND, INC.

(Exact name of Registrant as specified in charter)

90 Hudson Street, Jersey City, New Jersey 07302-3973
(Address of principal executive offices) (Zip code)

Randolph A. Stuzin, Esq.
Vice President and Assistant Secretary
Member, Chief Legal Officer of Lord, Abbett & Co. LLC
90 Hudson Street, Jersey City, New Jersey 07302-3973
(Name and address of agent for service)

Registrant’s telephone number, including area code: (888) 522-2388

Date of fiscal year end: 12/31

Date of reporting period: 12/31/2023

Item

1: Report(s) to Shareholders.

LORD ABBETT
ANNUAL REPORT

Lord Abbett
Mid Cap Stock Fund

For the fiscal year ended December 31, 2023

Table of Contents

1		A Letter to Shareholders

4		Investment Comparison

5		Information About Your Fund’s Expenses and Holdings Presented by Sector

8		Schedule of Investments

11		Statement of Assets and Liabilities

13		Statement of Operations

14		Statements of Changes in Net Assets

16		Financial Highlights

20		Notes to Financial Statements

30		Report of Independent Registered Public Accounting Firm

31		Supplemental Information to Shareholders

Lord Abbett Mid Cap Stock Fund
Annual Report

For the fiscal year ended December 31, 2023

From left to right: Evelyn E. Guernsey, Independent Chair of the Lord Abbett Funds and Douglas B. Sieg, Director, President and Chief Executive Officer of the Lord Abbett Funds.

Dear Shareholders: We are pleased to provide you with this overview of the performance of Lord Abbett Mid Cap Stock Fund for the fiscal year ended December 31, 2023. On this page and the following pages, we discuss the major factors that influenced fiscal year performance. For detailed and timely information about the Fund, please visit our website at www.lordabbett.com, where you can also access quarterly commentaries that provide updates on the Fund’s performance and other portfolio related updates.

Thank you for investing in Lord Abbett mutual funds. We value the trust that you place in us and look forward to serving your investment needs in the years to come.

Best regards,

Douglas B. Sieg
Director, President and Chief Executive Officer

For the fiscal year ended December 31, 2023, the Fund returned 15.50%, reflecting performance at the net asset value (“NAV”) of Class A shares with all distributions reinvested, compared to its benchmark, the Russell Midcap^® Value Index*, which returned 12.71% over the same period.

Markets had to endure a number of countervailing forces over the trailing 12 months, leading to periods of volatility and a wide dispersion of returns. On the positive side, market expectations of a soft landing in the U.S. economy were backed by falling inflation data, a tight labor market, a resilient consumer, and optimism regarding the potential impacts of artificial intelligence. While there were concerns

that corporate earnings could deteriorate, aggregate earnings results were better than expected as cost-cutting measures, strength in services sectors, and supply chain improvements generally benefitted companies.¹

Amid these positive trends, investors had concerns about aggressive U.S. Federal Reserve (Fed) monetary policy and fear of a potential policy mistake leading to a recession. Investor sentiment was also negatively impacted by several factors, including narrow market breadth, an underwhelming China recovery from the COVID-19 pandemic, geopolitical tensions, and rising energy prices. Markets also had to grapple with the ripple effects of the

turmoil in the banking sector, which led to regulatory shutdowns and interventions by the Fed, FDIC, and U.S. Treasury.¹

Against this backdrop, U.S. equities delivered positive returns with the S&P 500 Index up 26.3% over the period. However, performance was primarily driven by a handful of large cap names, and there was a great deal of dispersion below the surface. For example, large cap stocks²outperformed small cap stocks³(26.5% vs 16.9%, respectively), while growth stocks⁴outperformed value stocks⁵(41.2% vs 11.7%, respectively).

In terms of the Fund’s key performance drivers, over the 12-month period ending December 31, 2023, the Fund’s position in Spectrum Brands Holdings, Inc., a consumer products and home essentials company, contributed to relative performance. Shares rallied after the U.S. Department of Justice reached a settlement agreement related to Swedish conglomerate ASSA ABLOY’s acquisition of Spectrum Brands’ Hardware and Home Improvement division. The Fund’s position in KKR & Co., Inc., a leading alternatives investment firm, also contributed to relative performance. Shares rallied after KKR and Global Atlantic Financial Group LLC, a leading insurance company, announced a definitive agreement under which KKR will acquire the remaining 37%

stake of Global Atlantic, increasing KKR’s ownership to 100%. KKR also announced a series of other strategic initiatives and its expectation that such strategic initiatives, combined with the expanded ownership of Global Atlantic, will benefit all of its per share earnings metrics.

Conversely, one of the largest detractors from relative performance during the 12-month period ending December 31, 2023, was Organon & Co., a science-based global pharmaceutical company. Shares of the stock fell after the company reported fourth-quarter and full-year financial results that came in below consensus expectations, which was partially driven by a decline in sales of NuvaRing as a result of generic competition. The Fund’s position in Euronet Worldwide, Inc., a provider of electronic payment services, also detracted from relative performance. Shares of the stock fell after the company reported second quarter earnings which were below consensus expectations and lowered third quarter guidance.

The Fund’s portfolio is actively managed and, therefore, its holdings and the weightings of a particular issuer or particular sector as a percentage of portfolio assets are subject to change. Sectors may include many industries.

* The Russell Midcap^® Value Index measures the performance of those Russell Midcap companies with lower price-to-book ratios and lower forecasted growth values. The stocks are also members of the Russell 1000^® Value index.

¹ Factset.

² As represented by the Russell 1000^® Index as of 12/31/23.

³ As represented by the Russell 2000^® Index as of 12/31/23.

⁴ As represented by the Russell 3000^® Growth Index as of 12/31/23.

⁵ As represented by the Russell 3000^® Value Index as of 12/31/23.

Unless otherwise specified, indexes reflect total return, with all dividends reinvested. Indexes are unmanaged, do not reflect the deduction of fees or expenses, and are not available for direct investment.

Important Performance and Other Information Performance data quoted in the following pages reflect past performance and are no guarantee of future results. Current performance may be higher or lower than the performance quoted. The investment return and principal value of an investment in the Fund will fluctuate so that shares, on any given day or when redeemed, may be worth more or less than their original cost. You can obtain performance data current to the most recent month end by calling Lord Abbett at 888-522-2388 or referring to www.lordabbett.com.

Except where noted, comparative Fund performance does not account for the deduction of sales charges and would be different if sales charges were included. The Fund offers classes of shares with distinct pricing options. For a full description of the differences in pricing alternatives, please see the Fund’s prospectus.

During certain periods shown, expense waivers and reimbursements were in place. Without such expense waivers and reimbursements, the Fund’s returns would have been lower.

The annual commentary above discusses the views of the Fund’s management and various portfolio holdings of the Fund as of December 31, 2023. These views and portfolio holdings may have changed after this date. Information provided in the commentary is

not a recommendation to buy or sell securities. Because the Fund’s portfolio is actively managed and may change significantly, the Fund may no longer own the securities described above or may have otherwise changed its position in the securities. For more recent information about the Fund’s portfolio holdings, please visit www.lordabbett.com.

A Note about Risk: See Notes to Financial Statements for a discussion of investment risks. For a more detailed discussion of the risks associated with the Fund, please see the Fund’s prospectus.

Mutual funds are not insured by the FDIC, are not deposits or other obligations of, or guaranteed by, banks, and are subject to investment risks including possible loss of principal amount invested.

Investment Comparison

Below is a comparison of a $10,000 investment in Class A shares with the same investment in the Russell Midcap^® Value Index and the S&P MidCap 400^®Value Index, assuming reinvestment of all dividends and distributions. The performance of the other classes will be greater than or less than the performance shown in the graph below due to different sales loads and expenses applicable to such classes. The graph and performance table below do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. During certain periods, expenses of the Fund have been waived or reimbursed by Lord Abbett; without such waiver or reimbursement of expenses, the Fund’s returns would have been lower. Past performance is no guarantee of future results.

Average Annual Total Returns at Maximum Applicable Sales Charge for the Periods Ended December 31, 2023
	1 Year	5 Years	10 Years	Life of Class
Class A³	8.85%	9.52%	6.11%	–
Class C⁴	13.66%	10.00%	5.95%	–
Class F⁵	15.69%	11.00%	6.91%	–
Class F3⁶	15.94%	11.21%	–	6.52%
Class I⁵	15.80%	11.11%	7.01%	–
Class P⁵	15.27%	10.60%	6.55%	–
Class R2⁵	15.12%	10.44%	6.37%	–
Class R3⁵	15.25%	10.56%	6.50%	–
Class R4⁷	15.53%	10.83%	–	6.32%
Class R5⁷	15.81%	11.10%	–	6.58%
Class R6⁷	15.95%	11.20%	–	6.68%

¹ Reflects the deduction of the maximum initial sales charge of 5.75%.

² Performance of each unmanaged index does not reflect any fees or expenses. The performance of each index is not necessarily representative of the Fund’s performance.

³ Total return, which is the percentage change in net asset value, after deduction of the maximum initial sales charge of 5.75% applicable to Class A shares, with all dividends and distributions reinvested for the periods shown ended December 31, 2023, is calculated using the SEC-required uniform method to compute such return.

⁴ The 1% CDSC for Class C shares normally applies before the first anniversary of the purchase date. Performance for other periods is at net asset value.

⁵ Performance is at net asset value.

⁶ Commenced operations and performance for the Class began on April 4, 2017. Performance is at net asset value.

⁷ Commenced operations and performance for the Class began on June 30, 2015. Performance is at net asset value.

Expense Example

As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase payments (these charges vary among the share classes); and (2) ongoing costs, including management fees; distribution and service (12b-1) fees (these charges vary among the share classes); and other Fund expenses. This Example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (July 1, 2023 through December 31, 2023).

Actual Expenses

For each class of the Fund, the first line of the table on the following page provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading titled “Expenses Paid During Period 7/1/23 – 12/31/23” to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes

For each class of the Fund, the second line of the table on the following page provides information about hypothetical account values and hypothetical expenses based on the Fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads). Therefore, the second line of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

	Beginning Account Value		Ending Account Value		Expenses Paid During Period^†
	7/1/23		12/31/23		7/1/23 – 12/31/23
Class A
Actual	$	1,000.00	$	1,085.20	$	5.36
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,020.06	$	5.19
Class C
Actual	$	1,000.00	$	1,081.40	$	9.29
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,016.28	$	9.00
Class F
Actual	$	1,000.00	$	1,086.30	$	4.57
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,020.82	$	4.43
Class F3
Actual	$	1,000.00	$	1,087.40	$	3.58
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,021.78	$	3.47
Class I
Actual	$	1,000.00	$	1,086.60	$	4.05
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,021.32	$	3.92
Class P
Actual	$	1,000.00	$	1,084.20	$	6.41
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,019.06	$	6.21
Class R2
Actual	$	1,000.00	$	1,083.80	$	7.20
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,018.30	$	6.97
Class R3
Actual	$	1,000.00	$	1,084.30	$	6.67
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,018.80	$	6.46
Class R4
Actual	$	1,000.00	$	1,085.30	$	5.36
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,020.06	$	5.19
Class R5
Actual	$	1,000.00	$	1,087.00	$	4.05
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,021.32	$	3.92
Class R6
Actual	$	1,000.00	$	1,087.40	$	3.58
Hypothetical (5% Return Before Expenses)	$	1,000.00	$	1,021.78	$	3.47

^†

For each class of the Fund, net expenses are equal to the annualized expense ratio for such class (1.02% for Class A, 1.77% for Class C, 0.87% for Class F, 0.68% for Class F3, 0.77% for Class I, 1.22% for Class P, 1.37% for Class R2, 1.27% for Class R3, 1.02% for Class R4, 0.77% for Class R5 and 0.68% for Class R6) multiplied by the average account value over the period, multiplied by 184/365 (to reflect one-half year period).

Portfolio Holdings Presented by Sector

December 31, 2023

Sector*	%**
Communication Services	0.99	%
Consumer Discretionary	5.89	%
Consumer Staples	6.05	%
Energy	6.35	%
Financials	21.16	%
Health Care	9.11	%
Industrials	21.89	%
Information Technology	10.91	%
Materials	5.30	%
Real Estate	4.90	%
Utilities	5.97	%
Repurchase Agreements	1.48	%
Total	100.00	%

*		A sector may comprise several industries.
**		Represents percent of total investments, which excludes derivatives.

Schedule of Investments

December 31, 2023

Investments	Shares		Fair Value
LONG-TERM INVESTMENTS 98.73%

COMMON STOCKS 98.73%

Aerospace & Defense 1.53%
Curtiss-Wright Corp.		76,880	$	17,128,095

Banks 3.52%
Columbia Banking System, Inc.		753,948		20,115,333
East West Bancorp, Inc.		268,230		19,299,148
Total				39,414,481

Beverages 1.50%
Carlsberg AS Class B^(a)		133,790		16,788,515

Biotechnology 1.01%
Biogen, Inc.*		43,560		11,272,021

Building Products 5.62%
Allegion PLC (Ireland)^(b)		146,723		18,588,337
Builders FirstSource, Inc.*		111,280		18,577,083
Masco Corp.		385,370		25,812,083
Total				62,977,503

Capital Markets 6.07%
Ameriprise Financial, Inc.		51,670		19,625,816
KKR & Co., Inc.		352,750		29,225,338
Moelis & Co. Class A		341,340		19,159,414
Total				68,010,568

Chemicals 0.41%
Avient Corp.		110,321		4,586,044

Communications Equipment 1.16%
F5, Inc.*		72,390		12,956,362

Construction & Engineering 2.57%
AECOM		132,560		12,252,521
EMCOR Group, Inc.		76,680		16,519,172
Total				28,771,693

Construction Materials 2.76%
CRH PLC (Ireland)^(b)		176,310		12,193,600
Eagle Materials, Inc.		92,500		18,762,700
Total				30,956,300

Investments	Shares		Fair Value
Consumer Staples Distribution & Retail 3.48%
BJ’s Wholesale Club Holdings, Inc.*		266,516	$	17,765,956
Target Corp.		149,242		21,255,046
Total				39,021,002

Containers & Packaging 1.13%
Avery Dennison Corp.		62,940		12,723,950

Electric: Utilities 4.51%
Entergy Corp.		186,380		18,859,792
FirstEnergy Corp.		443,479		16,257,940
Portland General Electric Co.		355,383		15,402,300
Total				50,520,032

Electronic Equipment, Instruments & Components 4.17%
Crane NXT Co.		210,680		11,981,372
Keysight Technologies, Inc.*		105,700		16,815,813
Teledyne Technologies, Inc.*		40,090		17,891,766
Total				46,688,951

Energy Equipment & Services 1.40%
TechnipFMC PLC (United Kingdom)^(b)		777,840		15,665,698

Financial Services 1.71%
Global Payments, Inc.		151,380		19,225,260

Ground Transportation 2.88%
Landstar System, Inc.		89,230		17,279,390
Norfolk Southern Corp.		63,690		15,055,042
Total				32,334,432

Health Care Providers & Services 8.12%
Cencora, Inc.		113,230		23,255,177
Laboratory Corp. of America Holdings		98,560		22,401,702
Molina Healthcare, Inc.*		73,370		26,509,315
Tenet Healthcare Corp.*		249,850		18,881,165
Total				91,047,359

See Notes to Financial Statements.

Schedule of Investments (continued)

December 31, 2023

Investments	Shares		Fair Value
Hotels, Restaurants & Leisure 1.36%
Caesars Entertainment, Inc.*		325,600	$	15,264,128

Household Durables 1.40%
Helen of Troy Ltd.*		130,315		15,743,355

Household Products 1.08%
Spectrum Brands Holdings, Inc.		151,980		12,123,445

Insurance 9.91%
Allstate Corp.		174,740		24,460,105
American Financial Group, Inc.		98,433		11,702,699
Arch Capital Group Ltd.*		204,370		15,178,560
Arthur J Gallagher & Co.		57,971		13,036,518
Kemper Corp.		364,850		17,757,250
RenaissanceRe Holdings Ltd.		88,061		17,259,956
White Mountains Insurance Group Ltd.		7,770		11,693,928
Total				111,089,016

Machinery 4.01%
Crane Co.		164,700		19,457,658
Parker-Hannifin Corp.		55,320		25,485,924
Total				44,943,582

Media 0.99%
Nexstar Media Group, Inc.		70,690		11,080,658

Metals & Mining 1.00%
Reliance Steel & Aluminum Co.		40,280		11,265,510

Multi-Utilities 1.47%
CMS Energy Corp.		284,250		16,506,397

Oil, Gas & Consumable Fuels 4.97%
Chesapeake Energy Corp.		263,642		20,284,615
Devon Energy Corp.		449,730		20,372,769
Permian Resources Corp.		1,105,590		15,036,024
Total				55,693,408

Investments	Shares		Fair Value
Professional Services 3.14%
Maximus, Inc.		215,790	$	18,096,150
WNS Holdings Ltd. ADR*		271,392		17,151,974
Total				35,248,124

Real Estate Management & Development 1.75%
CBRE Group, Inc. Class A*		211,338		19,673,454

Residential REITS 1.86%
American Homes 4 Rent Class A		351,770		12,649,649
Camden Property Trust		82,110		8,152,702
Total				20,802,351

Retail REITS 1.30%
Kimco Realty Corp.		684,742		14,591,852

Semiconductors & Semiconductor Equipment 2.60%
Micron Technology, Inc.		135,390		11,554,183
Teradyne, Inc.		162,160		17,597,603
Total				29,151,786

Software 1.28%
Aspen Technology, Inc.*		65,055		14,321,858

Specialty Retail 3.14%
Best Buy Co., Inc.		219,940		17,216,903
Valvoline, Inc.*		477,798		17,955,649
Total				35,172,552

Technology Hardware, Storage & Peripherals 1.73%
NetApp, Inc.		220,340		19,425,174

Trading Companies & Distributors 2.19%
AerCap Holdings NV (Ireland)*^(b)		330,030		24,527,830
Total Common Stocks (cost $882,803,000)				1,106,712,746

See Notes to Financial Statements.

Schedule of Investments (concluded)

December 31, 2023

Investments	Principal Amount		Fair Value
SHORT-TERM INVESTMENTS 1.49%

Repurchase Agreements 1.49%
Repurchase Agreement dated 12/29/2023, 2.800% due 1/2/2024 with Fixed Income Clearing Corp. collateralized by $16,620,500 of U.S. Treasury Note at 4.625% due 3/15/2026; value: $16,994,811; proceeds: $16,666,730 (cost $16,661,547)	$	16,661,547	$	16,661,547
Total Investments in Securities 100.22% (cost $899,464,547)				1,123,374,293
Other Assets and Liabilities – Net (0.22)%				(2,427,511	)
Net Assets 100.00%			$	1,120,946,782

ADR		American Depositary Receipt.
REITS		Real Estate Investment Trusts.
*		Non-income producing security.
^(a)		Investment in non-U.S. dollar denominated securities.
^(b)		Foreign security traded in U.S. dollars.

The following is a summary of the inputs used as of December 31, 2023 in valuing the Fund’s investments carried at fair value⁽¹⁾:

Investment Type⁽²⁾	Level 1		Level 2		Level 3		Total
Long-Term Investments
Common Stocks
Beverages	$	–	$	16,788,515	$	–	$	16,788,515
Remaining Industries		1,089,924,231		–		–		1,089,924,231
Short-Term Investments
Repurchase Agreements		–		16,661,547		–		16,661,547
Total	$	1,089,924,231	$	33,450,062	$	–	$	1,123,374,293

	⁽¹⁾	Refer to Note 2(h) for a description of fair value measurements and the three-tier hierarchy of inputs.
	⁽²⁾	See Schedule of Investments for fair values in each industry and identification of foreign issuers and/or geography. The table above is presented by Investment Type. Industries are presented within an Investment Type should such Investment Type include securities classified as two or more levels within the three-tier fair value hierarchy. When applicable, each Level 3 security is identified on the Schedule of Investments along with the valuation technique utilized.

A reconciliation of Level 3 investments is presented when the Fund has a material amount of Level 3 investments at the beginning or end of the period in relation to the Fund’s net assets.

See Notes to Financial Statements.

Statement of Assets and Liabilities

December 31, 2023

ASSETS:
Investments in securities, at fair value (cost $899,464,547)	$	1,123,374,293
Cash		13
Foreign cash, at value (cost $247)		253
Receivables:
Interest and dividends		1,013,906
Capital shares sold		510,256
Prepaid expenses and other assets		26,878
Total assets		1,124,925,599
LIABILITIES:
Payables:
Investment securities purchased		1,412,423
12b-1 distribution plan		810,887
Management fee		547,158
Directors’ fees		516,231
Capital shares reacquired		352,378
Fund administration		37,318
Accrued expenses		302,422
Total liabilities		3,978,817
NET ASSETS	$	1,120,946,782
COMPOSITION OF NET ASSETS:
Paid-in capital	$	899,749,264
Total distributable earnings (loss)		221,197,518
Net Assets	$	1,120,946,782

See Notes to Financial Statements.

Statement of Assets and Liabilities (concluded)

December 31, 2023

Net assets by class:
Class A Shares	$	857,000,970
Class C Shares	$	12,577,158
Class F Shares	$	23,332,619
Class F3 Shares	$	21,250,346
Class I Shares	$	132,184,643
Class P Shares	$	25,776,521
Class R2 Shares	$	1,772,088
Class R3 Shares	$	17,682,427
Class R4 Shares	$	9,647,941
Class R5 Shares	$	3,400,046
Class R6 Shares	$	16,322,023
Outstanding shares by class:
Class A Shares (1.18 billion shares of common stock authorized, $.001 par value)		26,686,640
Class C Shares (200 million shares of common stock authorized, $.001 par value)		429,811
Class F Shares (472.5 million shares of common stock authorized, $.001 par value)		733,793
Class F3 Shares (472.5 million shares of common stock authorized, $.001 par value)		663,078
Class I Shares (472.5 million shares of common stock authorized, $.001 par value)		4,161,488
Class P Shares (200 million shares of common stock authorized, $.001 par value)		835,405
Class R2 Shares (200 million shares of common stock authorized, $.001 par value)		56,228
Class R3 Shares (381.6 million shares of common stock authorized, $.001 par value)		556,994
Class R4 Shares (381.6 million shares of common stock authorized, $.001 par value)		301,330
Class R5 Shares (381.6 million shares of common stock authorized, $.001 par value)		107,096
Class R6 Shares (381.6 million shares of common stock authorized, $.001 par value)		509,477
Net asset value, offering and redemption price per share (Net assets divided by outstanding shares):
Class A Shares-Net asset value		$32.11
Class A Shares-Maximum offering price (Net asset value plus sales charge of 5.75%)		$34.07
Class C Shares-Net asset value		$29.26
Class F Shares-Net asset value		$31.80
Class F3 Shares-Net asset value		$32.05
Class I Shares-Net asset value		$31.76
Class P Shares-Net asset value		$30.86
Class R2 Shares-Net asset value		$31.52
Class R3 Shares-Net asset value		$31.75
Class R4 Shares-Net asset value		$32.02
Class R5 Shares-Net asset value		$31.75
Class R6 Shares-Net asset value		$32.04

See Notes to Financial Statements.

Statement of Operations

For the Year Ended December 31, 2023

Investment income:
Dividends (net of foreign withholding taxes of $70,372)	$	18,728,758
Securities lending net income		23
Interest and other		445,195
Total investment income		19,173,976
Expenses:
Management fee		6,300,817
12b-1 distribution plan–Class A		2,034,887
12b-1 distribution plan–Class C		165,952
12b-1 distribution plan–Class F		33,237
12b-1 distribution plan–Class P		112,922
12b-1 distribution plan–Class R2		9,974
12b-1 distribution plan–Class R3		86,069
12b-1 distribution plan–Class R4		20,740
Shareholder servicing		1,060,325
Fund administration		428,066
Registration		168,422
Reports to shareholders		97,882
Professional		72,756
Directors’ fees		30,716
Custody		14,885
Other		119,317
Gross expenses		10,756,967
Expense reductions (See Note 8)		(9,685	)
Fees waived and expenses reimbursed (See Note 3)		(14,885	)
Net expenses		10,732,397
Net investment income		8,441,579
Net realized and unrealized gain (loss):
Net realized gain (loss) on investments		7,121,347
Net realized gain (loss) on foreign currency related transactions		1,535
Net change in unrealized appreciation/depreciation on investments		139,927,220
Net change in unrealized appreciation/depreciation on translation of assets and liabilities denominated in foreign currencies		5,466
Net realized and unrealized gain (loss)		147,055,568
Net Increase in Net Assets Resulting From Operations	$	155,497,147

See Notes to Financial Statements.

Statements of Changes in Net Assets

INCREASE (DECREASE) IN NET ASSETS	For the Year Ended December 31, 2023				For the Year Ended December 31, 2022
Operations:
Net investment income		$	8,441,579			$	13,363,641
Net realized gain (loss) on investments and foreign currency related transactions			7,122,882				75,082,945
Net change in unrealized appreciation/depreciation on investments and translation of assets and liabilities denominated in foreign currencies			139,932,686				(250,669,137	)
Net increase (decrease) in net assets resulting from operations			155,497,147				(162,222,551	)
Distributions to shareholders:
Class A			(10,607,158	)			(64,554,019	)
Class C			(108,249	)			(1,919,850	)
Class F			(345,570	)			(5,211,363	)
Class F3			(314,530	)			(1,584,133	)
Class I			(1,942,074	)			(8,094,551	)
Class P			(281,239	)			(2,128,453	)
Class R2			(16,136	)			(137,274	)
Class R3			(179,478	)			(1,300,183	)
Class R4			(117,596	)			(647,349	)
Class R5			(52,178	)			(280,345	)
Class R6			(237,616	)			(1,173,248	)
Total distributions to shareholders			(14,201,824	)			(87,030,768	)
Capital share transactions (See Note 14):
Net proceeds from sales of shares			111,423,010				162,355,263
Reinvestment of distributions			12,849,932				78,934,067
Cost of shares reacquired			(216,222,913	)			(421,444,364	)
Net decrease in net assets resulting from capital share transactions			(91,949,971	)			(180,155,034	)
Net increase (decrease) in net assets			49,345,352				(429,408,353	)
NET ASSETS:
Beginning of year		$	1,071,601,430			$	1,501,009,783
End of year		$	1,120,946,782			$	1,071,601,430

See Notes to Financial Statements.

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Financial Highlights

			Per Share Operating Performance:
			Investment Operations:								Distributions to shareholders from:
	Net asset value, beginning of period		Net invest- ment income (loss)^(a)		Net realized and unrealized gain (loss)			Total from invest- ment oper- ations			Net investment income			Net realized gain			Total distri- butions

Class A
12/31/2023	$	28.15	$	0.23	$	4.12		$	4.35		$	(0.17	)	$	(0.22	)	$	(0.39	)
12/31/2022		34.35		0.33		(4.17	)		(3.84	)		(0.30	)		(2.06	)		(2.36	)
12/31/2021		29.02		0.25		8.01			8.26			(0.27	)		(2.66	)		(2.93	)
12/31/2020		28.59		0.32		0.46	^(c)		0.78			(0.35	)		–			(0.35	)
12/31/2019		24.01		0.30		5.19			5.49			(0.25	)		(0.66	)		(0.91	)

Class C
12/31/2023		25.72		0.01		3.75			3.76			–			(0.22	)		(0.22	)
12/31/2022		31.59		0.09		(3.84	)		(3.75	)		(0.06	)		(2.06	)		(2.12	)
12/31/2021		26.88		–		7.39			7.39			(0.02	)		(2.66	)		(2.68	)
12/31/2020		26.47		0.12		0.40	^(c)		0.52			(0.11	)		–			(0.11	)
12/31/2019		22.29		0.09		4.81			4.90			(0.06	)		(0.66	)		(0.72	)

Class F
12/31/2023		27.86		0.25		4.11			4.36			(0.20	)		(0.22	)		(0.42	)
12/31/2022		34.02		0.37		(4.13	)		(3.76	)		(0.34	)		(2.06	)		(2.40	)
12/31/2021		28.76		0.30		7.94			8.24			(0.32	)		(2.66	)		(2.98	)
12/31/2020		28.34		0.35		0.46	^(c)		0.81			(0.39	)		–			(0.39	)
12/31/2019		23.80		0.34		5.16			5.50			(0.30	)		(0.66	)		(0.96	)

Class F3
12/31/2023		28.07		0.33		4.12			4.45			(0.25	)		(0.22	)		(0.47	)
12/31/2022		34.24		0.44		(4.16	)		(3.72	)		(0.39	)		(2.06	)		(2.45	)
12/31/2021		28.92		0.37		7.97			8.34			(0.36	)		(2.66	)		(3.02	)
12/31/2020		28.46		0.40		0.48	^(c)		0.88			(0.42	)		–			(0.42	)
12/31/2019		23.88		0.39		5.18			5.57			(0.33	)		(0.66	)		(0.99	)

Class I
12/31/2023		27.84		0.30		4.09			4.39			(0.25	)		(0.22	)		(0.47	)
12/31/2022		34.01		0.40		(4.13	)		(3.73	)		(0.38	)		(2.06	)		(2.44	)
12/31/2021		28.76		0.33		7.93			8.26			(0.35	)		(2.66	)		(3.01	)
12/31/2020		28.33		0.37		0.47	^(c)		0.84			(0.41	)		–			(0.41	)
12/31/2019		23.79		0.37		5.16			5.53			(0.33	)		(0.66	)		(0.99	)

Class P
12/31/2023		27.06		0.16		3.97			4.13			(0.11	)		(0.22	)		(0.33	)
12/31/2022		33.13		0.26		(4.03	)		(3.77	)		(0.24	)		(2.06	)		(2.30	)
12/31/2021		28.07		0.18		7.74			7.92			(0.20	)		(2.66	)		(2.86	)
12/31/2020		27.67		0.26		0.43	^(c)		0.69			(0.29	)		–			(0.29	)
12/31/2019		23.25		0.23		5.04			5.27			(0.19	)		(0.66	)		(0.85	)

Class R2
12/31/2023		27.64		0.12		4.05			4.17			(0.07	)		(0.22	)		(0.29	)
12/31/2022		33.79		0.22		(4.11	)		(3.89	)		(0.20	)		(2.06	)		(2.26	)
12/31/2021		28.58		0.13		7.88			8.01			(0.14	)		(2.66	)		(2.80	)
12/31/2020		28.16		0.22		0.45	^(c)		0.67			(0.25	)		–			(0.25	)
12/31/2019		23.54		0.18		5.10			5.28			–	^(d)		(0.66	)		(0.66	)


16	See Notes to Financial Statements.

					Ratios to Average Net Assets:							Supplemental Data:
Net asset value, end of period		Total return^(b) (%)			Total expenses after waivers and/or reimburse- ments (%)		Total expenses (%)		Net investment income (loss) (%)			Net assets, end of period (000)		Portfolio turnover rate (%)

$	32.11		15.50			1.03		1.03		0.77		$	857,001		41
	28.15		(11.06	)		1.01		1.01		1.08			808,839		40
	34.35		28.88			0.98		0.98		0.74			1,002,000		61
	29.02		2.73			1.02		1.02		1.26			851,886		63
	28.59		22.91			0.98		0.98		1.08			978,197		69

	29.26		14.66			1.78		1.78		0.02			12,577		41
	25.72		(11.76	)		1.76		1.76		0.33			23,867		40
	31.59		27.96			1.73		1.73		(0.01	)		35,761		61
	26.88		1.94			1.78		1.78		0.51			33,469		63
	26.47		22.04			1.73		1.73		0.36			54,897		69

	31.80		15.69			0.88		0.88		0.87			23,333		41
	27.86		(10.93	)		0.85		0.85		1.19			62,473		40
	34.02		29.09			0.83		0.83		0.89			135,505		61
	28.76		2.86			0.88		0.88		1.41			120,942		63
	28.34		23.14			0.83		0.83		1.25			146,125		69

	32.05		15.94			0.68		0.68		1.11			21,250		41
	28.07		(10.78	)		0.67		0.67		1.42			19,312		40
	34.24		29.29			0.64		0.64		1.07			24,037		61
	28.92		3.11			0.68		0.68		1.61			21,165		63
	28.46		23.36			0.66		0.66		1.42			23,828		69

	31.76		15.80			0.78		0.78		1.03			132,185		41
	27.84		(10.85	)		0.75		0.75		1.31			86,662		40
	34.01		29.19			0.73		0.73		0.99			212,934		61
	28.76		3.00			0.77		0.77		1.46			196,164		63
	28.33		23.26			0.73		0.73		1.36			407,723		69

	30.86		15.27			1.23		1.23		0.57			25,777		41
	27.06		(11.27	)		1.21		1.21		0.88			26,568		40
	33.13		28.64			1.18		1.18		0.54			34,019		61
	28.07		2.51			1.23		1.23		1.06			31,575		63
	27.67		22.69			1.19		1.19		0.88			39,511		69

	31.52		15.12			1.38		1.38		0.42			1,772		41
	27.64		(11.40	)		1.36		1.36		0.74			1,800		40
	33.79		28.46			1.33		1.33		0.39			2,054		61
	28.58		2.37			1.38		1.38		0.91			1,791		63
	28.16		22.46			1.33		1.33		0.70			2,510		69


	See Notes to Financial Statements.	17

Financial Highlights (concluded)

			Per Share Operating Performance:
			Investment Operations:								Distributions to shareholders from:
	Net asset value, beginning of period		Net invest- ment income (loss)^(a)		Net realized and unrealized gain (loss)			Total from invest- ment oper- ations			Net investment income			Net realized gain			Total distri- butions

Class R3
12/31/2023	$	27.83	$	0.15	$	4.08		$	4.23		$	(0.09	)	$	(0.22	)	$	(0.31	)
12/31/2022		33.99		0.25		(4.13	)		(3.88	)		(0.22	)		(2.06	)		(2.28	)
12/31/2021		28.74		0.17		7.92			8.09			(0.18	)		(2.66	)		(2.84	)
12/31/2020		28.32		0.25		0.44	^(c)		0.69			(0.27	)		–			(0.27	)
12/31/2019		23.78		0.23		5.15			5.38			(0.18	)		(0.66	)		(0.84	)

Class R4
12/31/2023		28.07		0.23		4.12			4.35			(0.18	)		(0.22	)		(0.40	)
12/31/2022		34.27		0.33		(4.17	)		(3.84	)		(0.30	)		(2.06	)		(2.36	)
12/31/2021		28.92		0.24		7.99			8.23			(0.22	)		(2.66	)		(2.88	)
12/31/2020		28.50		0.31		0.46	^(c)		0.77			(0.35	)		–			(0.35	)
12/31/2019		23.93		0.30		5.19			5.49			(0.26	)		(0.66	)		(0.92	)

Class R5
12/31/2023		27.83		0.30		4.09			4.39			(0.25	)		(0.22	)		(0.47	)
12/31/2022		34.00		0.40		(4.13	)		(3.73	)		(0.38	)		(2.06	)		(2.44	)
12/31/2021		28.75		0.34		7.92			8.26			(0.35	)		(2.66	)		(3.01	)
12/31/2020		28.32		0.38		0.46	^(c)		0.84			(0.41	)		–			(0.41	)
12/31/2019		23.79		0.38		5.14			5.52			(0.33	)		(0.66	)		(0.99	)

Class R6
12/31/2023		28.06		0.33		4.12			4.45			(0.25	)		(0.22	)		(0.47	)
12/31/2022		34.23		0.44		(4.16	)		(3.72	)		(0.39	)		(2.06	)		(2.45	)
12/31/2021		28.91		0.37		7.97			8.34			(0.36	)		(2.66	)		(3.02	)
12/31/2020		28.45		0.40		0.48	^(c)		0.88			(0.42	)		–			(0.42	)
12/31/2019		23.88		0.39		5.17			5.56			(0.33	)		(0.66	)		(0.99	)


(a)	Calculated using average shares outstanding during the period.
(b)	Total return for Classes A and C does not consider the effects of sales loads and assumes the reinvestment of all distributions. Total return for all other classes assumes the reinvestment of all distributions.
(c)	Realized and unrealized gain (loss) per share does not correlate to the aggregate of the net realized and unrealized gain (loss) in the Statement of Operations for the year ended December 31, 2020, primarily due to the timing of the sales and repurchases of the Fund’s shares in relation to fluctuating market values of the Fund’s portfolio.
(d)	Amount less than $0.01.


18	See Notes to Financial Statements.

					Ratios to Average Net Assets:						Supplemental Data:
Net asset value, end of period		Total return^(b) (%)			Total expenses after waivers and/or reimburse- ments (%)		Total expenses (%)		Net investment income (loss) (%)		Net assets, end of period (000)		Portfolio turnover rate (%)

$	31.75		15.25			1.28		1.28		0.52	$	17,682		41
	27.83		(11.31	)		1.26		1.26		0.83		16,486		40
	33.99		28.58			1.23		1.23		0.49		22,910		61
	28.74		2.46			1.28		1.28		1.01		20,618		63
	28.32		22.65			1.23		1.23		0.84		26,024		69

	32.02		15.53			1.03		1.03		0.77		9,648		41
	28.07		(11.09	)		1.01		1.01		1.09		8,032		40
	34.27		28.90			0.98		0.98		0.73		8,477		61
	28.92		2.71			1.03		1.03		1.26		17,417		63
	28.50		22.96			0.98		0.98		1.09		18,203		69

	31.75		15.81			0.78		0.78		1.02		3,400		41
	27.83		(10.85	)		0.76		0.76		1.33		3,358		40
	34.00		29.20			0.73		0.73		1.00		4,211		61
	28.75		3.00			0.78		0.78		1.52		3,654		63
	28.32		23.22			0.73		0.73		1.38		3,951		69

	32.04		15.95			0.68		0.68		1.11		16,322		41
	28.06		(10.79	)		0.67		0.67		1.42		14,204		40
	34.23		29.30			0.64		0.64		1.07		19,102		61
	28.91		3.11			0.68		0.68		1.62		16,603		63
	28.45		23.32			0.66		0.66		1.42		23,949		69


	See Notes to Financial Statements.	19

Notes to Financial Statements

1.	ORGANIZATION

Lord Abbett Mid Cap Stock Fund, Inc. (the “Fund”) is registered under the Investment Company Act of 1940, as amended (the “Act”), as a diversified, open-end management investment company and was incorporated under Maryland law on March 14, 1983.

The Fund’s investment objective is to seek capital appreciation through investments, primarily in equity securities, which are believed to be undervalued in the marketplace. The Fund has eleven active classes of shares: Class A, C, F, F3, I, P, R2, R3, R4, R5 and R6, each with different expenses and dividends. A front-end sales charge is normally added to the net asset value (“NAV”) for Class A shares. There is no front-end sales charge in the case of Class C, F, F3, I, P, R2, R3, R4, R5 and R6 shares, although there may be a contingent deferred sales charge (“CDSC”) in certain cases as follows: Class A shares purchased without a sales charge and redeemed before the first day of the month in which the one-year anniversary of the purchase falls (subject to certain exceptions as set forth in the Fund’s prospectus); and Class C shares redeemed before the first anniversary of purchase. Class C shares automatically convert to Class A shares on the 25th day of the month (or, if the 25th day is not a business day, the next business day thereafter) following the eighth anniversary of the month on which the purchase order was accepted, provided that the Fund or financial intermediary through which a shareholder purchased Class C shares has records verifying that the C shares have been held at least eight years. The Fund’s Class P shares are closed to substantially all new investors, with certain exceptions as set forth in the Fund’s prospectus.

The preparation of the financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. The Fund is considered an investment company under U.S. GAAP and follows the accounting and reporting guidance applicable to investment companies.

2.	SIGNIFICANT ACCOUNTING POLICIES

(a)	Investment Valuation–Under procedures approved by the Fund’s Board of Directors (the “Board”), the Board has designated the determination of fair value of the Fund’s portfolio investments to Lord, Abbett & Co. LLC (“Lord Abbett”) as its valuation designee. Accordingly, Lord Abbett is responsible for, among other things, assessing and managing valuation risks, establishing, applying and testing fair value methodologies, and evaluating pricing services. Lord Abbett has formed a Pricing Committee that performs these responsibilities on behalf of Lord Abbett, administers the pricing and valuation of portfolio investments and ensures that prices utilized reasonably reflect fair value. Among other things, these procedures allow Lord Abbett, subject to Board oversight, to utilize independent pricing services, quotations from securities and financial instrument dealers and other market sources to determine fair value.

	Securities actively traded on any recognized U.S. or non-U.S. exchange or on The NASDAQ Stock Market LLC are valued at the last sale price or official closing price on the exchange or system on which they are principally traded. Events occurring after the close of trading on non-U.S. exchanges may result in adjustments to the valuation of foreign securities to reflect their fair value as of the close of regular trading on the New York Stock Exchange. When valuing foreign equity securities that meet certain criteria, the Pricing Committee uses a third-party fair valuation service that values such securities to reflect market trading that occurs after the close of the applicable foreign markets of comparable securities or other

Notes to Financial Statements (continued)

	instruments that correlate to the fair-valued securities. Unlisted equity securities are valued at the last quoted sale price or, if no sale price is available, at the mean between the most recently quoted bid and ask prices.

	Securities for which prices are not readily available are valued at fair value as determined by the Pricing Committee. The Pricing Committee considers a number of factors, including observable and unobservable inputs, when arriving at fair value. The Pricing Committee may use related or comparable assets or liabilities, recent transactions, market multiples, book values, and other relevant information to determine the fair value of portfolio investments. The Board or a designated committee thereof periodically reviews reports that may include fair value determinations made by the Pricing Committee, related market activity, inputs and assumptions, and retrospective comparison of prices of subsequent purchases and sales transactions to fair value determinations made by the Pricing Committee.

	Short-term securities with 60 days or less remaining to maturity are valued using the amortized cost method, which approximates fair value.

(b)	Security Transactions–Security transactions are recorded as of the date that the securities are purchased or sold (trade date). Realized gains and losses on sales of portfolio securities are calculated using the identified-cost method. Realized and unrealized gains (losses) are allocated to each class of shares based upon the relative proportion of net assets at the beginning of the day.

(c)	Investment Income–Dividend income is recorded on the ex-dividend date. Interest income is recorded on the accrual basis as earned. Discounts are accreted and premiums are amortized using the effective interest method and are included in Interest and other, if applicable, in the Statement of Operations. Withholding taxes on foreign dividends have been provided for in accordance with the applicable country’s tax rules and rates. Investment income is allocated to each class of shares based upon the relative proportion of net assets at the beginning of the day.

(d)	Income Taxes–It is the policy of the Fund to meet the requirements of Subchapter M of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all taxable income and capital gains to its shareholders. Therefore, no income tax provision is required.

	The Fund files U.S. federal and various state and local tax returns. No income tax returns are currently under examination. The statute of limitations on the Fund’s filed U.S. federal tax returns remains open for the fiscal years ended December 31, 2020 through December 31, 2023. The statutes of limitations on the Fund’s state and local tax returns may remain open for an additional year depending upon the Fund’s jurisdiction.

(e)	Expenses–Expenses, excluding class-specific expenses, are allocated to each class of shares based upon the relative proportion of net assets at the beginning of the day. In addition, Class F3 and R6 bear only their class-specific shareholder servicing expenses. Class A, C, F, P, R2, R3, and R4 shares bear their class-specific share of all expenses and fees relating to the Fund’s 12b-1 Distribution Plan.

(f)	Foreign Transactions–The books and records of the Fund are maintained in U.S. dollars and transactions denominated in foreign currencies are recorded in the Fund’s records at the rate prevailing when earned or recorded. Asset and liability accounts that are denominated in foreign currencies are adjusted daily to reflect current exchange rates and any unrealized gain (loss), if applicable, is included in Net change in unrealized appreciation/depreciation on translation of assets and liabilities denominated in foreign currencies in the Fund’s Statement of Operations.

Notes to Financial Statements (continued)

	The resultant exchange gains and losses upon settlement of such transactions, if applicable, are included in Net realized gain (loss) on foreign currency related transactions in the Fund’s Statement of Operations. The Fund does not isolate that portion of the results of operations arising as a result of changes in the foreign exchange rates from the changes in market prices of the securities.

	The Fund uses foreign currency exchange contracts to facilitate transactions in foreign-denominated securities. Losses from these transactions may arise from changes in the value of the foreign currency or if the counterparties do not perform under the contracts’ terms.

(g)	Repurchase Agreements–The Fund may enter into repurchase agreements with respect to securities. A repurchase agreement is a transaction in which a fund acquires a security and simultaneously commits to resell that security to the seller (a bank or securities dealer) at an agreed-upon price on an agreed-upon date. The Fund requires at all times that the repurchase agreement be collateralized by cash, or by securities of the U.S. Government, its agencies, its instrumentalities, or U.S. Government sponsored enterprises having a value equal to, or in excess of, the value of the repurchase agreement (including accrued interest). If the seller of the agreement defaults on its obligation to repurchase the underlying securities at a time when the fair value of these securities has declined, the Fund may incur a loss upon disposition of the securities.

(h)	Fair Value Measurements–Fair value is defined as the price that the Fund would receive upon selling an investment or transferring a liability in an orderly transaction to an independent buyer in the principal or most advantageous market of the investment. A three-tier hierarchy is used to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Inputs refer broadly to the assumptions that market participants would use in pricing the asset or liability, including assumptions about risk - for example, the risk inherent in a particular valuation technique used to measure fair value (such as a pricing model) and/or the risk inherent in the inputs to the valuation technique. Inputs may be observable or unobservable. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability. Observable inputs are based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Unobservable inputs are based on the best information available in the circumstances. The three-tier hierarchy classification is determined based on the lowest level of inputs that is significant to the fair value measurement, and is summarized in the three broad Levels listed below:

•	Level 1 –	unadjusted quoted prices in active markets for identical investments;

•	Level 2 –	other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.); and

•	Level 3 –	significant unobservable inputs (including the Fund’s own assumptions in determining the fair value of investments).

	A summary of inputs used in valuing the Fund’s investments as of December 31, 2023 and, if applicable, Level 3 rollforwards for the fiscal year then ended is included in the Fund’s Schedule of Investments.

	Changes in valuation techniques may result in transfers into or out of an assigned level within the three-tier hierarchy. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

Notes to Financial Statements (continued)

3.	MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES

Management Fee

The Fund has a management agreement with Lord Abbett, pursuant to which Lord Abbett provides the Fund with investment management services and executive and other personnel, provides office space and pays for ordinary and necessary office and clerical expenses relating to research and statistical work and supervision of the Fund’s investment portfolio. The management fee is accrued daily and payable monthly.

The management fee is based on the Fund’s average daily net assets at the following annual rates:

First $200 million	.75	%
Next $300 million	.65	%
Over $500 million	.50	%

For the fiscal year ended December 31, 2023, the effective management fee, net of any applicable waiver, was at an annualized rate of .59% of the Fund’s average daily net assets.

In addition, Lord Abbett provides certain administrative services to the Fund pursuant to an Administrative Services Agreement in return for a fee at an annual rate of .04% of the Fund’s average daily net assets. The fund administration fee is accrued daily and payable monthly. Lord Abbett voluntarily waived $14,885 of fund administration fees during the fiscal year ended December 31, 2023.

12b–1 Distribution Plan

The Fund has adopted a distribution plan with respect to Class A, C, F, P, R2, R3 and R4 shares pursuant to Rule 12b-1 under the Act, which provides for the payment of ongoing distribution and service fees to Lord Abbett Distributor LLC (the “Distributor”), an affiliate of Lord Abbett. The distribution and service fees are accrued daily and payable monthly. The following annual rates have been authorized by the Board pursuant to the plan:

Fees*	Class A			Class C		Class F⁽¹⁾		Class P		Class R2		Class R3		Class R4
Service		.25%	⁽²⁾		.25%		–		.25%		.25%		.25%		.25%
Distribution		–			.75%		.10%		.20%		.35%		.25%		–


*	The Fund may designate a portion of the aggregate fees attributable to service activities for purposes of calculating Financial Industry Regulatory Authority, Inc. sales charge limitations.
⁽¹⁾	The Class F shares Rule 12b-1 fee may be designated as a service fee in limited circumstances as described in the Fund’s prospectus.
⁽²⁾	Annual service fee on shares sold prior to June 1, 1990 was .15% of the average daily net assets attributable to Class A shares.

Class F3, Class I, Class R5 and Class R6 shares do not have a distribution plan.

Commissions

The Distributor received the following commissions on sales of shares of the Fund, after concessions were paid to authorized dealers, during the fiscal year ended December 31, 2023:

Distributor Commissions				Dealers’ Concessions
	$19,966				$112,038

Distributor received CDSCs of $293 and $248 for Class A and Class C shares, respectively, for the fiscal year ended December 31, 2023.

One Director and certain of the Fund’s officers have an interest in Lord Abbett.

Notes to Financial Statements (continued)

4.	DISTRIBUTIONS AND TAX INFORMATION

Dividends are paid from net investment income, if any. Capital gain distributions are paid from taxable net realized gains from investments transactions, reduced by allowable capital loss carryforwards, if any. The capital loss carryforward amount, if any, is available to offset future net capital gains. Dividends and distributions to shareholders are recorded on the ex-dividend date. The amounts of dividends and distributions from net investment income and net realized capital gains are determined in accordance with federal income tax regulations, which may differ from U.S. GAAP. These book/tax differences are either considered temporary or permanent in nature. To the extent these differences are permanent in nature, such amounts are reclassified within the components of net assets based on their federal tax basis treatment; temporary differences do not require reclassification. Dividends and distributions, which exceed earnings and profits for tax purposes, are reported as a tax return of capital.

The tax character of distributions paid during the fiscal year ended December 31, 2023 was as follows:

Fund

Tax-Exempt
Income

Ordinary
Income

Net
Long-Term
Capital Gains

Return of
Capital

Total
Distributions
Paid

Mid Cap Stock Fund

–

$6,243,794

$7,958,030

–

$14,201,824

The tax character of distributions paid during the fiscal year ended December 31, 2022 was as follows:

Fund

Tax-Exempt
Income

Ordinary
Income

Net
Long-Term
Capital Gains

Return of
Capital

Total
Distributions
Paid

Mid Cap Stock Fund

–

$12,413,229

$74,617,539

–

$87,030,768

As of December 31, 2023, the components of distributable earnings (loss) on a tax basis were as follows:

Fund		Undistributed Tax-Exempt Income				Undistributed Ordinary Income				Undistributed Net Long-Term Capital Gains				Accumulated Capital and Other Losses				Unrealized Appreciation/ (Depreciation)				Temporary Differences				Total Distributable Earnings (Loss)
Mid Cap Stock Fund		$	–				$183,518			$	–				$(1,566,551	)			$223,096,782				$(516,231	)			$221,197,518

At the Fund’s election, certain losses incurred within the taxable year are deemed to arise on the first business day of the Fund’s next taxable year. The Fund incurred and will elect to defer qualified late-year ordinary losses and/or post-October capital losses as follows:

Fund		Late-Year Ordinary Losses				Short-Term Losses				Long-Term Losses
Mid Cap Stock Fund		$	–			$	1,585,361			$	(3,151,913)

As of December 31, 2023, the tax cost of investments and the breakdown of unrealized appreciation/(depreciation) for the Fund are shown below. The difference between book-basis and tax basis unrealized appreciation/(depreciation) is attributable to the tax treatment of certain securities, certain distributions, and wash sales.

Fund		Tax Cost of Investments				Gross Unrealized Appreciation				Gross Unrealized Depreciation				Net Unrealized Appreciation/ (Depreciation)
Mid Cap Stock Fund			$900,276,454				$239,958,115				$(16,860,276	)			$223,097,839

Permanent items identified, as shown below, have been reclassified among the components of net assets based on their tax treatment. The permanent differences are primarily attributable to the tax treatment of certain distributions.

Fund		Total Distributable Earnings (Loss)			Paid-in Capital
Mid Cap Stock Fund		$(832,413	)		$832,413

Notes to Financial Statements (continued)

5.	PORTFOLIO SECURITIES TRANSACTIONS

Purchases and sales of investment securities (excluding short-term investments) during the fiscal year ended December 31, 2023 were as follows:

Purchases				Sales
	$430,568,473				$522,208,364

There were no purchases or sales of U.S. Government securities during the fiscal year ended December 31, 2023.

The Fund is permitted to purchase and sell securities (“cross-trade”) from and to other Lord Abbett funds or client accounts pursuant to procedures approved by the Board in compliance with Rule 17a-7 under the Act (the “Rule”). Each cross-trade is executed at a fair market price in compliance with provisions of the Rule. For the fiscal year ended December 31, 2023, the Fund did not engage in cross-trade purchases or sales.

6.	DISCLOSURES ABOUT OFFSETTING ASSETS AND LIABILITIES

The Financial Accounting Standards Board requires disclosures intended to help better assess the effect or potential effect of offsetting arrangements on a fund’s financial position. The following tables illustrate gross and net information about recognized assets and liabilities eligible for offset in the Statement of Assets and Liabilities; and disclose such amounts subject to an enforceable master netting agreement or similar agreement, by the counterparty. A master netting agreement is an agreement between a fund and a counterparty which provides for the net settlement of amounts owed under all contracts traded under that agreement, as well as cash collateral, through a single payment by one party to the other in the event of default on or termination of any one contract. The Fund’s accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the master netting agreement does not result in an offset of reported amounts of financial assets and liabilities in the Statement of Assets and Liabilities across transactions between the Fund and the applicable counterparty:

Description	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Assets and Liabilities		Net Amounts of Assets Presented in the Statement of Assets and Liabilities
Repurchase Agreements		$16,661,547	$	–		$16,661,547
Total		$16,661,547	$	–		$16,661,547

	Net Amounts of Assets Presented in the Statement of Assets and Liabilities		Amounts Not Offset in the Statement of Assets and Liabilities
Counterparty			Financial Instruments		Cash Collateral Received^(a)		Securities Collateral Received^(a)			Net Amount^(b)
Fixed Income Clearing Corp.		$16,661,547	$	–	$	–	$	(16,661,547	)	$	–
Total		$16,661,547	$	–	$	–	$	(16,661,547	)	$	–


^(a)	Collateral disclosed is limited to an amount not to exceed 100% of the net amount of assets (liabilities) presented in the Statement of Assets and Liabilities, for each respective counterparty.
^(b)	Net amount represents the amount owed to the Fund by the counterparty as of December 31, 2023.

Notes to Financial Statements (continued)

7.	DIRECTORS’ REMUNERATION

The Fund’s officers and one Director, who are associated with Lord Abbett do not receive any compensation from the Fund for serving in such capacities. Independent Directors’ fees are allocated among all Lord Abbett-sponsored funds based on the net assets of each fund. There is an equity-based plan available to all Independent Directors under which Independent Directors may elect to defer receipt of a portion of Directors’ fees. The deferred amounts are treated as though equivalent dollar amounts had been invested in the Fund. Such amounts and earnings accrued thereon are included in Directors’ fees in the Statement of Operations and in Directors’ fees payable in the Statement of Assets and Liabilities and are not deductible for U.S. federal income tax purposes until such amounts are paid.

8.	EXPENSE REDUCTIONS

The Fund had entered into an arrangement with its prior transfer agent and its custodian, whereby credits realized as a result of uninvested cash balances are used to reduce a portion of the Fund’s expenses. The arrangement with the Fund’s prior transfer agent was discontinued effective March 6, 2023.

9.	LINE OF CREDIT

For the period ended August 2, 2023, the Fund and certain other funds managed by Lord Abbett (collectively, the “Participating Funds”) were party to a syndicated line of credit facility with various lenders for $1.625 billion (the “Syndicated Facility”) under which State Street Bank and Trust Company (“SSB”) participated as a lender and as agent for the lenders. The Participating Funds were subject to graduated borrowing limits of one-third of fund net assets (if fund net assets are less than $750 million), $250 million, $300 million, $700 million, or $1 billion, based on past borrowings and likelihood of future borrowings, among other factors.

Effective August 3, 2023, the Participating Funds renewed the Syndicated Facility for $1.6 billion. The Participating Funds remain subject to the same borrowing limits as were in place prior to the renewal.

For the period ended August 2, 2023, the Participating Funds were also party to an additional uncommitted line of credit facility with SSB for $330 million (the “Bilateral Facility”). Under the Bilateral Facility, the Participating Funds were subject to graduated borrowing limits of one-third of fund net assets (if fund net assets are less than $750 million), or $250 million based on past borrowings and likelihood of future borrowings, among other factors.

Effective August 3, 2023, the Participating Funds renewed the Bilateral Facility in the same amount. The Participating Funds remain subject to the same borrowing limits as were in place prior to the renewal.

These credit facilities are to be used for temporary or emergency purposes as additional sources of liquidity to satisfy redemptions.

For the fiscal year ended December 31, 2023, the Fund did not utilize the Syndicated Facility or Bilateral Facility.

10.

INTERFUND LENDING PROGRAM

Pursuant to an exemptive order issued by the U.S. Securities and Exchange Commission (“SEC exemptive order”) certain registered open-end management investment companies managed by Lord Abbett, including the Fund, participate in a joint lending and borrowing program (the “Interfund Lending Program”). The SEC exemptive order allows the funds that participate in the Interfund Lending Program to borrow money from and lend money to each other for temporary or emergency purposes subject to the limitations and conditions.

Notes to Financial Statements (continued)

For the fiscal year ended December 31, 2023, the Fund did not participate as a borrower or lender in the Interfund Lending Program.

11.

CUSTODIAN AND ACCOUNTING AGENT

SSB is the Fund’s custodian and accounting agent. SSB performs custodial, accounting and recordkeeping functions relating to portfolio transactions and calculating the Fund’s NAV.

12.

SECURITIES LENDING AGREEMENT

The Fund has established a securities lending agreement with Citibank, N.A. for the lending of securities to qualified brokers in exchange for securities or cash collateral equal to at least the market value of securities loaned, plus interest, if applicable. Cash collateral is invested in an approved money market fund. In accordance with the Fund’s securities lending agreement, the market value of securities on loan is determined each day at the close of business and any additional collateral required to cover the value of securities on loan is delivered to the Fund on the next business day. As with other extensions of credit, the Fund may experience a delay in the recovery of its securities or incur a loss should the borrower of the securities breach its agreement with the Fund or the borrower becomes insolvent at a time when the collateral is insufficient to cover the cost of repurchasing securities on loan. Any income earned from securities lending is included in Securities lending net income on the Fund’s Statement of Operations.

The initial collateral received by the Fund is required to have a value equal to at least 100% of the market value of the securities loaned. The collateral must be marked-to-market daily to cover increases in the market value of the securities loaned (or potentially a decline in the value of the collateral). In general, the risk of borrower default will be borne by Citibank, N.A.; the Fund will bear the risk of loss with respect to the investment of the cash collateral. The advantage of such loans is that the Fund continues to receive income on loaned securities while receiving a portion of any securities lending fees and earning returns on the cash amounts which may be reinvested for the purchase of investments in securities.

As of December 31, 2023, the Fund did not have any securities on loan.

13.

INVESTMENT RISKS

The Fund is subject to the general risks and considerations associated with equity investing, as well as the particular risks associated with value and mid-sized company stocks. The value of an investment will fluctuate in response to movements in the equity securities market in general, and to the changing prospects of individual companies in which the Fund invests. The market may fail to recognize for a long time the intrinsic value of particular value stocks the Fund may hold. Value investing is also subject to the risk that a company judged to be undervalued may actually be appropriately priced or even overpriced. The mid-sized company stocks in which the Fund invests may be less able to weather economic shifts or other adverse developments than those of larger, more established companies. Accordingly, mid-sized company securities tend to be more sensitive to changing economic, market, and industry conditions and tend to be more volatile and less liquid than equity securities of larger companies, especially over the short term. In addition, if the Fund’s assessment of a company’s value or prospects for exceeding earnings expectations or market conditions is wrong, the Fund could suffer losses or produce poor performance relative to other funds, even in a favorable market.

Because the Fund invests in real estate investment trusts (“REITS”), it may be subject to the risks that impact the value of the underlying properties or mortgages of the REITs in which it invests. These risks include loss to casualty or condemnation, and changes in supply and demand, interest rates,

Notes to Financial Statements (continued)

zoning laws, regulatory limitations on rents, property taxes, and operating expenses. Other factors that may adversely affect REITs include poor performance by management of the REIT, changes to the tax laws, or failure by the REIT to qualify for tax-free distribution of income, and changes in local, regional, or general economic conditions.

Due to the Fund’s investment exposure to foreign companies and American Depositary Receipts, the Fund may experience increased market, liquidity, currency, political, information, and other risks. As compared with companies organized and operated in the U.S., these companies may be more vulnerable to economic, political and social instability and subject to less government supervision, lack of transparency, inadequate regulatory and accounting standards, and foreign taxes. The securities of foreign companies also may be subject to inadequate exchange control regulations, the imposition of economic sanctions or other government restrictions, higher transaction and other costs, and delays in settlement to the extent they are traded on non-U.S. exchanges or markets.

Geopolitical and other events (e.g., wars, terrorism, natural disasters, epidemics or pandemics) may disrupt securities markets and adversely affect global economies and markets, thereby decreasing the value of the Fund’s investments. Market disruptions can also prevent the Fund from implementing its investment strategies and achieving its investment objective.

In March 2023, the shut-down of certain financial institutions raised economic concerns over disruption in the U.S. banking system. There can be no certainty that the actions taken by the U.S. government to strengthen public confidence in the U.S. banking system will be effective in mitigating the effects of financial institution failures on the economy and restoring public confidence in the U.S. banking system.

The impact of the COVID-19 outbreak, and the effects of other infectious illness outbreaks, epidemics, or pandemics, may be short term or may continue for an extended period of time. For example, a global pandemic or other widespread health crises could negatively affect the global economy, the economies of individual countries, and the financial performance of individual issuers, sectors, industries, asset classes, and markets in significant and unforeseen ways. Health crises caused by outbreaks of disease may also exacerbate other pre-existing political, social, and economic risks in certain countries or globally. The foregoing could disrupt the operations of the Fund and its service providers, adversely affect the value and liquidity of the Fund’s investments, and negatively impact the Fund’s performance and your investment in the Fund.

14.

SUMMARY OF CAPITAL TRANSACTIONS

Transactions in shares of capital stock were as follows:

	Year Ended December 31, 2023						Year Ended December 31, 2022
Class A Shares	Shares			Amount			Shares			Amount
Shares sold*		1,420,507		$	42,407,437			990,245		$	29,996,790
Reinvestment of distributions		305,309			9,668,053			2,090,222			58,644,437
Shares reacquired		(3,773,336	)		(111,816,038	)		(3,513,198	)		(106,520,406	)
Decrease		(2,047,520	)	$	(59,740,548	)		(432,731	)	$	(17,879,179	)
Class C Shares
Shares sold		63,851		$	1,768,650			60,392		$	1,690,673
Reinvestment of distributions		3,720			106,076			73,445			1,887,663
Shares reacquired*		(565,567	)		(15,006,887	)		(338,094	)		(9,471,160	)
Decrease		(497,996	)	$	(13,132,161	)		(204,257	)	$	(5,892,824	)

Notes to Financial Statements (concluded)

	Year Ended December 31, 2023						Year Ended December 31, 2022
Class F Shares	Shares			Amount			Shares			Amount
Shares sold		34,761		$	1,005,266			419,045		$	12,346,588
Reinvestment of distributions		9,801			306,414			178,167			4,950,141
Shares reacquired		(1,553,308	)		(46,011,934	)		(2,337,500	)		(72,282,678	)
Decrease		(1,508,746	)	$	(44,700,254	)		(1,740,288	)	$	(54,985,949	)
Class F3 Shares
Shares sold		70,691		$	2,059,054			70,024		$	2,133,156
Reinvestment of distributions		9,930			314,530			56,664			1,584,133
Shares reacquired		(105,654	)		(3,104,402	)		(140,508	)		(4,301,378	)
Decrease		(25,033	)	$	(730,818	)		(13,820	)	$	(584,089	)
Class I Shares
Shares sold		1,730,846		$	51,211,498			3,536,462		$	106,477,743
Reinvestment of distributions		55,045			1,729,276			251,676			7,035,404
Shares reacquired		(736,788	)		(21,488,444	)		(6,935,803	)		(209,642,843	)
Increase (decrease)		1,049,103		$	31,452,330			(3,147,665	)	$	(96,129,696	)
Class P Shares
Shares sold		175,307		$	4,960,104			183,525		$	5,475,473
Reinvestment of distributions		9,225			280,074			78,728			2,124,628
Shares reacquired		(330,856	)		(9,366,932	)		(307,409	)		(9,205,691	)
Decrease		(146,324	)	$	(4,126,754	)		(45,156	)	$	(1,605,590	)
Class R2 Shares
Shares sold		9,931		$	285,577			9,807		$	293,473
Reinvestment of distributions		514			15,927			3,978			109,594
Shares reacquired		(19,349	)		(551,679	)		(9,444	)		(288,096	)
Increase (decrease)		(8,904	)	$	(250,175	)		4,341		$	114,971
Class R3 Shares
Shares sold		106,458		$	3,136,113			54,160		$	1,654,475
Reinvestment of distributions		5,754			179,477			46,841			1,300,156
Shares reacquired		(147,555	)		(4,278,606	)		(182,679	)		(5,742,513	)
Decrease		(35,343	)	$	(963,016	)		(81,678	)	$	(2,787,882	)
Class R4 Shares
Shares sold		65,383		$	1,925,708			94,776		$	3,067,790
Reinvestment of distributions		2,748			86,837			18,558			518,845
Shares reacquired		(52,927	)		(1,536,527	)		(74,583	)		(2,210,730	)
Increase		15,204		$	476,018			38,751		$	1,375,905
Class R5 Shares
Shares sold		15,927		$	467,573			20,401		$	600,903
Reinvestment of distributions		370			11,541			2,973			82,404
Shares reacquired		(29,859	)		(887,424	)		(26,563	)		(814,895	)
Decrease		(13,562	)	$	(408,310	)		(3,189	)	$	(131,588	)
Class R6 Shares
Shares sold		73,029		$	2,196,030			68,998		$	2,142,706
Reinvestment of distributions		4,788			151,727			24,935			696,662
Shares reacquired		(74,606	)		(2,174,040	)		(145,643	)		(4,488,481	)
Increase (decrease)		3,211		$	173,717			(51,710	)	$	(1,649,113	)

*	Includes automated conversion of Class C shares to Class A shares.

Report of Independent Registered Public Accounting Firm

To the shareholders and the Board of Directors of Lord Abbett Mid Cap Stock Fund, Inc.

Opinion on the Financial Statements and Financial Highlights

We have audited the accompanying statement of assets and liabilities of Lord Abbett Mid Cap Stock Fund, Inc. (the “Fund”), including the schedule of investments, as of December 31, 2023, the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended, and the related notes. In our opinion, the financial statements and financial highlights present fairly, in all material respects, the financial position of the Fund as of December 31, 2023, and the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements and financial highlights are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements and financial highlights based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement, whether due to error or fraud. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Fund’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements and financial highlights, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements and financial highlights. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements and financial highlights. Our procedures included confirmation of securities owned as of December 31, 2023, by correspondence with the custodian or counterparties; when replies were not received, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
New York, New York
February 26, 2024

We have served as the auditor of one or more Lord Abbett Family of Funds’ investment companies since 1932.

Basic Information About Management

The Board is responsible for the management of the business and affairs of the Fund in accordance with the laws of the state of organization. The Board elects officers who are responsible for the day-to-day operations of the Fund and who execute policies authorized by the Board. The Board also approves an investment adviser to the Fund and continues to monitor the cost and quality of the services the investment adviser provides, and annually considers whether to renew the contract with the investment adviser. Generally, each Board member holds office until his/her successor is elected and qualified or until his/her earlier resignation or removal, as provided in the Fund’s organizational documents.

Lord, Abbett & Co. LLC (“Lord Abbett”), a Delaware limited liability company, is the Fund’s investment adviser. Designated Lord Abbett personnel are responsible for the day-to-day management of the Fund.

Independent Board Members

The following Independent Board Members also are board members of each of the 15 investment companies in the Lord Abbett Family of Funds, which consist of 64 investment portfolios.

Name, Address and Year of Birth	Current Position and Length of Service with the Fund	Principal Occupation and Other Directorships During the Past Five Years
Evelyn E. Guernsey Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1955)	Board member since 2011; Board Member Chair (since 2024) Vice Chair (2023)	Principal Occupation: None. Other Directorships: None.
Kathleen M. Lutito Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1963)	Board member since 2017	Principal Occupation: President and Chief Investment Officer of CenturyLink Investment Management Company (since 2006). Other Directorships: None.
James M. McTaggart Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1947)	Board member since 2012	Principal Occupation: Owner of McTaggart LLC (since 2011). Other Directorships: None.
Charles O. Prince Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1950)	Board member since 2019	Principal Occupation: None. Formerly Chair and Chief Executive Officer, Citigroup, Inc. (Retired 2007). Other Directorships: Previously served as Director of Johnson & Johnson (2005–2022); Director of Xerox Corporation (2007–2018).
Karla M. Rabusch Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1959)	Board member since 2017	Principal Occupation: President and Director of Wells Fargo Funds Management, LLC (2003–2017); President of Wells Fargo Funds (2003–2016). Other Directorships: None.

Basic Information About Management (continued)

Name, Address and Year of Birth	Current Position and Length of Service with the Fund	Principal Occupation and Other Directorships During the Past Five Years
Lorin Patrick Taylor Radtke Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1968)	Board member since 2021	Principal Occupation: Partner and Co-Founder of M Seven 8 Partners LLC, a venture capital firm (since 2016). Formerly Partner, Goldman Sachs (1992–2016). Other Directorships: Currently serves as Director of Assured Guaranty (since 2021); Virtual Combine (since 2018). Previously served as Director of SummerMoon Coffee (2022); Mariposa Family Learning (2021–2022).
Leah Song Richardson Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1966)	Board member since 2021	Principal Occupation: President of Colorado College (since 2021). Formerly Dean at University of California, Irvine–School of Law (2017–2021); Professor of Law at University of California, Irvine (2014–2017). Other Directorships: None.
Mark A. Schmid Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1959)	Board member since 2016	Principal Occupation: Vice President and Chief Investment Officer of the University of Chicago (2009–2021). Other Directorships: Currently serves as Director of Underwriters Laboratories Research Institute (since 2022).
James L.L. Tullis Lord, Abbett & Co. LLC c/o Legal Dept. 90 Hudson Street Jersey City, NJ 07302 (1947)	Board member since 2006;	Principal Occupation: Chair of Tullis Health Investors - FL LLC (since 2019, CEO from 2012–2018); Formerly CEO of Tullis-Dickerson and Co. Inc., a venture capital management firm (1990–2016). Other Directorships: Currently serves as Chair of Crane Co. (since 2020, Director since 1998), Director of Crane NXT, Co. (since 2023), Director of Alphatec Spine (since 2018). Previously served as Director of Exagen Inc. (2019–2023); Director of electroCore, Inc. (2018–2020).

Interested Board Members

Mr. Sieg is affiliated with Lord Abbett and is an “interested person” of the Fund as defined in the Act. Mr. Sieg is a board member of each of the 15 investment companies in the Lord Abbett Family of Funds, which consist of 64 investment portfolios. Mr. Sieg is an officer of the Lord Abbett Family of Funds.

Basic Information About Management (continued)

Name, Address and
Year of Birth

Current Position and
Length of Service
with the Fund

Principal Occupation and Other Directorships
During the Past Five Years

Douglas B. Sieg
Lord, Abbett & Co. LLC
90 Hudson Street
Jersey City, NJ 07302
(1969)

Board member since 2016

Principal Occupation: Managing Partner of Lord Abbett (since 2018). Formerly Head of Client Services, joined Lord Abbett in 1994.

Other Directorships: None.

Officers

None of the officers listed below have received compensation from the Fund. All of the officers of the Fund also may be officers of the other Lord Abbett Funds and maintain offices at 90 Hudson Street, Jersey City, NJ 07302. Unless otherwise indicated, the position(s) and title(s) listed under the “Principal Occupation During the Past Five Years” column indicate each officer’s position(s) and title(s) with Lord Abbett. Each officer serves for an indefinite term (i.e., until his or her death, resignation, retirement, or removal).

Name and Year of Birth	Current Position with the Fund	Length of Service of Current Position	Principal Occupation During the Past Five Years
Douglas B. Sieg (1969)	President and Chief Executive Officer	Elected as President and Chief Executive Officer in 2018	Managing Partner of Lord Abbett (since 2018) and was formerly Head of Client Services, joined Lord Abbett in 1994.
Jackson C. Chan (1964)	AML Compliance Officer	Elected in 2018	Deputy Chief Compliance Officer and Director of Regulatory Affairs, joined Lord Abbett in 2014.
Nicholas D. Emguschowa (1986)	Data Protection Officer	Elected in 2022	Assistant General Counsel, joined Lord Abbett in 2018 and was formerly Associate at Shearman & Sterling (2014–2018).
Brooke A. Fapohunda (1975)	Vice President, Secretary, Chief Legal Officer	Elected in 2023	Partner and Senior Counsel, joined Lord Abbett in 2006.
Michael J. Hebert (1976)	Chief Financial Officer and Treasurer	Elected as Chief Financial Officer and Treasurer in 2021	Head of Global Fund Finance, joined Lord Abbett in 2021 and was formerly Vice President at Eaton Vance Management (EVM) (2014–2021) and Calvert Research & Management (CRM) (2016–2021), and Assistant Treasurer of registered investment companies managed, advised or administered by EVM and CRM during such years.
Parker J. Milender (1989)	Vice President and Assistant Secretary	Elected in 2023	Counsel, joined Lord Abbett in 2021 and was formerly an Associate at Milbank LLP (2017–2021).

Basic Information About Management (concluded)

Name and Year of Birth	Current Position with the Fund	Length of Service of Current Position	Principal Occupation During the Past Five Years
Mary Ann Picciotto (1973)	Chief Compliance Officer	Elected in 2023	Managing Director and Global Chief Compliance Officer, joined Lord Abbett in 2023 and was formerly Vice President and Head of Global Compliance at T. Rowe Price (2019–2023) and Senior Vice President, Head of Compliance at OppenheimerFunds, Inc. (2014–2019).
Matthew A. Press (1987)	Vice President and Assistant Secretary	Elected in 2023	Counsel, joined Lord Abbett in 2022 and was formerly an Associate at Clifford Chance US LLP (2014–2022).
Randolph A. Stuzin (1963)	Vice President and Assistant Secretary	Elected in 2023	Partner and Chief Legal Officer, joined Lord Abbett in 2023 and was formerly Partner and General Counsel at King Street Capital Management (2014–2023).
Victoria Zozulya (1983)	Vice President and Assistant Secretary	Elected in 2022	Counsel, joined Lord Abbett in 2022 and was formerly Senior Director and Counsel at Equitable (2018–2022) and Assistant General Counsel at Neuberger Berman (2014–2018).

Please call 888-522-2388 for a copy of the statement of additional information, which contains further information about the Fund’s Board members. It is available free upon request.

Householding

The Fund has adopted a policy that allows it to send only one copy of the Fund’s prospectus, proxy material, annual report and semiannual report (or related notice of internet availability of annual report and semiannual report) to certain shareholders residing at the same “household.” This reduces Fund expenses, which benefits you and other shareholders. If you need additional copies or do not want your mailings to be “householded,” please call Lord Abbett at 888-522-2388 or send a written request with your name, the name of your fund or funds and your account number or numbers to Lord Abbett Funds Service Center, P.O. Box 534489, Pittsburgh, PA 15253-4489 (regular mail) or 500 Ross Street 154-0520, Attention: 534489, Pittsburgh, PA 15262 (overnight mail).

Proxy Voting Policies, Procedures and Records

A description of the policies and procedures that Lord Abbett uses to vote proxies related to the Fund’s portfolio securities, and information on how Lord Abbett voted the Fund’s proxies during the 12-month period ended June 30 are available without charge, upon request, (i) by calling 888-522-2388; (ii) on Lord Abbett’s website at www.lordabbett.com; and (iii) on the Securities and Exchange Commission’s (“SEC”) website at www.sec.gov.

Shareholder Reports and Quarterly Portfolio Disclosure

The Fund is required to file its complete schedule of portfolio holdings with the SEC for its first and third fiscal quarters as an attachment to Form N-PORT. Copies of the filings are available without charge, upon request on the SEC’s website at www.sec.gov and may be available by calling Lord Abbett at 888-522-2388.


Tax Information (unaudited)

The percentages below reflect the portion of ordinary income distributions that are eligible for the corporate dividend received deduction (DRD) and qualified dividend income (QDI) for individual shareholders:

Fund Name	DRD	QDI
Mid Cap Stock Fund	100%	100%

Of the distributions paid to the shareholders during the most recently ended fiscal year, the following amounts represents long-term capital gains:

Fund Name	Long-Term Capital Gains
Mid Cap Stock Fund		$7,958,030

This report, when not used for the general information of shareholders of the Fund, is to be distributed only if preceded or accompanied by a current fund prospectus.

Lord Abbett mutual fund shares are distributed by LORD ABBETT DISTRIBUTOR LLC.	Lord Abbett Mid Cap Stock Fund, Inc.	LAMCVF-2 (2/24)

Item 2:

Code of Ethics.

(a)

In accordance with applicable requirements, the Registrant adopted a Sarbanes-Oxley Code of Ethics on June 19, 2003 that applies to the principal executive officer and senior financial officers of the Registrant (“Code of Ethics”). The Code of Ethics was in effect during the fiscal year ended December 31, 2023 (the “Period”).

(b)

Not applicable.

(c)

The Registrant has not amended the Code of Ethics as described in Form N-CSR during the Period.

(d)

The Registrant has not granted any waiver, including an implicit waiver, from a provision of the Code of Ethics as described in Form N-CSR during the Period.

(e)

Not applicable.

(f)

See Item 13(a)(1) concerning the filing of the Code of Ethics.

Item 3:

Audit Committee Financial Expert.

The Registrant’s board of directors has determined that each of the following independent directors who are members of the audit committee is an audit committee financial expert: Evelyn E. Guernsey and Karla M. Rabusch. Each of these persons is independent within the meaning of the Form N-CSR.

Item 4:

Principal Accountant Fees and Services.

In response to sections (a), (b), (c) and (d) of Item 4, the aggregate fees billed to the Registrant for the fiscal years ended December 31, 2023 and 2022 by the Registrant’s principal accounting firm, Deloitte & Touche LLP, the member firms of Deloitte Touche Tohmatsu and their respective affiliates (collectively, “Deloitte”) were as follows:

	Fiscal year ended:
	2023	2022
Audit Fees {a}	$41,000	$43,000
Audit-Related Fees	- 0 -	- 0 -
Total audit and audit-related fees	41,000	43,000

Tax Fees {b}	- 0 -	- 0 -
All Other Fees	- 0 -	- 0 -

Total Fees	$41,000	$43,000

{a} Consists of fees for audits of the Registrant’s annual financial statements.

{b} Fees for the fiscal year ended December 31, 2023 and 2022 consist of fees for services related to the recovery of excess dividend withholding taxes in certain jurisdictions.

(e) (1) Pursuant to Rule 2-01(c) (7) of Regulation S-X, the Registrant’s Audit Committee has adopted pre-approval policies and procedures. Such policies and procedures generally provide that the Audit Committee must pre-approve:

any audit, audit-related, tax, and other services to be provided to the Lord Abbett Funds, including the Registrant, and

any audit-related, tax, and other services to be provided to the Registrant’s investment adviser and any entity controlling, controlled by or under common control with the investment adviser that provides ongoing services to one or more Funds comprising the Registrant if the engagement relates directly to operations and financial reporting of a Fund, by the independent auditor to assure that the provision of such services does not impair the auditor’s independence.

The Audit Committee has delegated pre-approval authority to its Chair, subject to a fee limit of $10,000 per event, and not to exceed $25,000 annually. The Chair will report any pre-approval decisions to the Audit Committee at its next scheduled meeting. Unless a type of service to be provided by the independent auditor has received general pre-approval, it must be pre-approved by the Audit Committee. Any proposed services exceeding pre-approved cost levels will require specific pre-approval by the Audit Committee.

(e) (2) The Registrant’s Audit Committee has approved 100% of the services described in paragraphs (b) through (d) of this Item 4, no amount was approved by the Audit Committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

(f) Not applicable.

(g) The aggregate non-audit fees billed by Deloitte for services rendered to the Registrant are shown above in the response to Item 4 (a), (b), (c) and (d) as “All Other Fees”.

The aggregate non-audit fees billed by Deloitte for services rendered to the Registrant’s investment adviser, Lord, Abbett & Co. LLC (“Lord Abbett”), for the fiscal years ended December 31, 2023 and 2022 were:

	Fiscal year ended:
	2023	2022
All Other Fees {a}	$230,000	$270,000

{a} Consist of fees for Independent Services Auditors’ Report on Controls Placed in Operation and Tests of Operating Effectiveness related to Lord Abbett’s Asset Management Services (“SOC-1 Report”).

The aggregate non-audit fees billed by Deloitte for services rendered to entities under the common control of Lord Abbett for the fiscal years ended December 31, 2023 and 2022 were:

	Fiscal year ended:
	2023	2022
All Other Fees	$ - 0 -	$ - 0 -

(h) The Registrant’s Audit Committee has considered the provision of non-audit services that were rendered to the Registrant’s investment adviser, and any entity controlling, controlled by or under common control with the investment adviser that provides ongoing services to the Registrant, that were not pre-approved pursuant to Rule 2-01 (c)(7)(ii) of Regulation S-X and has determined that the provision of such services is compatible with maintaining Deloitte’s independence.

(i) Not Applicable.

(j) Not Applicable.

Item 5:

Audit Committee of Listed Registrants.

Not applicable.

Item 6:

Investments.

The Schedule of Investments is included as part of the Reports to Shareholders under Item 1.

Item 7:

Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Not applicable.

Item 8:

Portfolio Managers of Closed-End Management Investment Companies.

Not applicable.

Item 9:

Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

Item 10:

Submission of Matters to a Vote of Security Holders.

Not applicable.

Item 11:

Controls and Procedures.

(a)

The principal executive officer and principal financial & accounting officer have concluded as of a date within 90 days of the filing date of this report, based on their evaluation of the Registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940), that the design of such procedures is effective to provide reasonable assurance that material information required to be disclosed by the Registrant

on Form N-CSR is recorded, processed, summarized and reported within the time periods specified in the Commission’s rules and forms.

(b)

There were no changes in the Registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the Registrant’s internal control over financial reporting.

Item 12:

Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.

Not applicable.

Item 13:

Exhibits.

(a)(1)

The Lord Abbett Family of Funds Sarbanes-Oxley Code of Ethics for the Principal Executive Officer and Senior Financial Officers is attached hereto as part of EX-99.CODEETH.

(a)(2)

Certification of each Principal Executive Officer and Principal Financial Officer of the Registrant as required by Rule 30a-2 under the Investment Company Act of 1940 is attached hereto as a part of EX-99.CERT.

(b)

Certification of each Principal Executive Officer and Principal Financial Officer of the Registrant as required by Section 906 of the Sarbanes-Oxley Act of 2002 is provided as a part of EX-99.906CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

LORD ABBETT MID CAP STOCK FUND, INC.

	By:	/s/ Douglas B. Sieg
		Douglas B. Sieg
		President and Chief Executive Officer

Date: February 27, 2024

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

	By:	/s/ Douglas B. Sieg
		Douglas B. Sieg
		President and Chief Executive Officer

Date: February 27, 2024

	By:	/s/ Michael J. Hebert
		Michael J. Hebert
		Chief Financial Officer and Treasurer

Date: February 27, 2024