mid_cap_stock_fund_portfolio_holdings

Electric: Utilities 4.25%

Entergy Corp.

186,380 $ 19,696,638

FirstEnergy Corp.

443,479

17,127,159

Portland General

Electric Co.

355,383

14,926,086

Total

51,749,883

Electronic Equipment, Instruments &

Components 6.31%

Crane NXT Co.

200,810

12,430,139

Keysight Technologies,

Inc.*

113,710

17,781,970

Littelfuse, Inc.

46,683

11,313,625

TD SYNNEX Corp.

160,220

18,120,882

Teledyne Technologies,

Inc.*

40,090

17,211,439

Total

76,858,055

Energy Equipment & Services 1.00%

Liberty Energy, Inc.

587,800

12,179,216

Financial Services 1.50%

Global Payments, Inc. 136,470

18,240,580

Ground Transportation 2.65%

Landstar System, Inc.

89,230

17,199,975

Norfolk Southern Corp. 59,170

15,080,658

Total

32,280,633

Health Care Providers & Services 8.62%

Cencora, Inc.

113,230

27,513,758

Laboratory Corp. of

America Holdings

112,490

24,574,565

Molina Healthcare, Inc.* 73,370

30,142,597

Tenet Healthcare Corp.* 216,640

22,771,030

Total

105,001,950

Hotels, Restaurants & Leisure 1.17%

Caesars Entertainment, Inc.* 325,600

14,241,744

Household Durables 1.23%

Helen of Troy Ltd.*

130,315

15,017,501

LONG-TERM INVESTMENTS 99.22%

COMMON STOCKS 99.22%

Banks 1.79%

East West Bancorp, Inc. 275,990 $ 21,833,569

Beverages 1.50%

Carlsberg AS Class B

(a)

133,790

18,321,881

Building Products 5.72%

Allegion PLC (Ireland)

(b)

146,723

19,765,055

Builders FirstSource, Inc.* 104,070

21,703,799

Masco Corp.

358,060

28,243,773

Total

69,712,627

Capital Markets 5.85%

Ameriprise Financial, Inc. 49,730

21,803,621

KKR & Co., Inc.

273,310

27,489,520

Moelis & Co. Class A

386,950

21,967,151

Total

71,260,292

Chemicals 1.30%

Avient Corp.

365,360

15,856,624

Communications Equipment 1.13%

F5, Inc.*

72,390

13,724,420

Construction & Engineering 1.72%

EMCOR Group, Inc.

59,760

20,927,952

Construction Materials 3.19%

CRH PLC (Ireland)

(b)

230,710

19,901,045

Eagle Materials, Inc.

70,030

19,030,652

Total

38,931,697

Consumer Staples Distribution & Retail 3.73%

BJ's Wholesale Club

Holdings, Inc.*

251,626

19,035,507

Target Corp.

149,242

26,447,175

Total

45,482,682

Containers & Packaging 1.15%

Avery Dennison Corp.

62,940

14,051,355

Schedule of Investments (unaudited)

LORD ABBETT MID CAP STOCK FUND, INC.

Fair

Investments

Value

Fair

Investments

Value

Insurance 10.68%

Allstate Corp.

131,550 $ 22,759,466

American Financial

Group, Inc.

135,253

18,459,329

Arch Capital Group Ltd.* 204,370

18,891,963

Arthur J Gallagher & Co. 49,980

12,496,999

Kemper Corp.

367,560

22,759,315

RenaissanceRe

Holdings Ltd.

80,341

18,882,545

White Mountains Insurance

Group Ltd.

8,840

15,861,612

Total

130,111,229

Leisure Products 1.09%

Brunswick Corp.

138,230

13,341,960

Machinery 4.72%

Crane Co.

96,245

13,005,587

Cummins, Inc.

51,370

15,136,171

Parker-Hannifin Corp.

52,850

29,373,501

Total

57,515,259

Media 1.00%

Nexstar Media Group, Inc. 70,690

12,179,180

Multi-Utilities 1.41%

CMS Energy Corp.

284,250

17,151,645

Oil, Gas & Consumable Fuels 6.04%

Chesapeake Energy Corp. 266,302

23,655,607

Devon Energy Corp.

490,030

24,589,705

Permian Resources Corp.1,436,320

25,365,411

Total

73,610,723

Professional Services 4.14%

CACI International, Inc.

Class A*

39,520

14,971,362

Maximus, Inc.

215,790

18,104,781

WNS Holdings

Ltd. (India)*

(b)

344,850

17,425,270

Total

50,501,413

Real Estate Management &

Development 1.75%

CBRE Group, Inc. Class A* 218,840 $ 21,280,002

Residential REITS 1.07%

American Homes 4

Rent Class A

355,390

13,071,244

Retail REITS 1.02%

Kimco Realty Corp.

637,530

12,501,963

Semiconductors & Semiconductor

Equipment 2.50%

Silicon Motion

Technology Corp. ADR 158,200

12,171,908

Teradyne, Inc.

162,160

18,296,513

Total

30,468,421

Software 1.04%

Aspen Technology, Inc.* 59,390

12,666,699

Specialty Retail 3.90%

Academy Sports &

Outdoors, Inc.

228,930

15,461,932

Best Buy Co., Inc.

242,690

19,907,861

Valvoline, Inc.*

272,940

12,164,936

Total

47,534,729

Technology Hardware, Storage &

Peripherals 1.90%

NetApp, Inc.

220,340

23,129,090

Trading Companies & Distributors 3.15%

AerCap Holdings NV

(Ireland)*

(b)

277,080

24,081,023

Core & Main, Inc. Class A* 249,920

14,307,920

Total

38,388,943

Total Common Stocks

(cost $908,010,101)

1,209,125,161

Schedule of Investments (unaudited)(continued)

LORD ABBETT MID CAP STOCK FUND, INC.

Fair

Investments

Value

Fair

Investments

Value

SHORT-TERM INVESTMENTS 1.09%

Repurchase Agreements 1.09%

Repurchase Agreement

dated 3/28/2024, 2.800%

due 4/1/2024 with Fixed

Income Clearing Corp.

collateralized by

$13,718,100 of U.S.

Treasury Bond at 4.250%

due 2/15/2054;

value: $13,553,879;

proceeds: $13,292,202

(cost $13,288,068) $13,288,068 $ 13,288,068

Total Investments in Securities 100.31%

(cost $921,298,169)

1,222,413,229

Other Assets and

Liabilities – Net (0.31)%

(3,751,687)

Net Assets 100.00%

$1,218,661,542

ADR American Depositary Receipt.

REITS Real Estate Investment Trusts.

Non-income producing security.

(

Investment in non-U.S. dollar denominated

securities.

(b)

Foreign security traded in U.S. dollars.

Schedule of Investments (unaudited)(concluded)

LORD ABBETT MID CAP STOCK FUND, INC.

Principal

Fair

Investments

Amount

Value

The following is a summary of the inputs used as of March 31, 2024 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 $ – $

18,321,881 $ – $

18,321,881

Remaining Industries

1,190,803,280 – –

1,190,803,280

Short-Term Investments

Repurchase Agreements –

13,288,068 –

13,288,068

Total $

1,190,803,280 $

31,609,949 $ – $

1,222,413,229

(1)

Refer to Note 2(b) 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.

Notes to Schedule of Investments (unaudited)

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.

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

investment 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 the 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

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) 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 March 31, 2024 and, if

applicable, Level 3 rollforwards for the period 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.

3. FEDERAL TAX INFORMATION

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 generally three years after the filing of the tax return. The statute of limitations on

the Fund’s state and local tax returns may remain open for an additional year depending upon the

jurisdiction.

4. 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

Notes to Schedule of Investments (unaudited)(continued)

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.

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 March 31, 2024, the Fund did not have any securities on loan.

Notes to Schedule of Investments (unaudited)(concluded)