Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Nadi Jahida Salim 2. Issuer Name and Ticker or Trading Symbol MSC INDUSTRIAL DIRECT CO INC [MSM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Senior Vice President, Sales (Last) (First) (Middle) C/O MSC INDUSTRIAL DIRECT CO., INC., 515 BROADHOLLOW ROAD 3. Date of Earliest Transaction (Month/Day/Year) 11/03/2026 (Street) MELVILLE, NY 11747 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock, $0.001 par value 11/03/2026 M 1,178 A $ 0 (1) 1,178 D Class A Common Stock, $0.001 par value 11/03/2026 M 42.973 A $ 0 (2) 1,221 D Class A Common Stock, $0.001 par value 11/03/2026 F 622.973(3) D $120.3 598 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Options (right to buy)(4)

$120.3

11/03/2026

A

3,138

(5)

11/02/2036

Class A Common Stock, $0.001 par value

3,138

$ 0

3,138

D

Restricted Stock Units (RSU)

(1)

11/03/2026

A

1,508

(6)

(6)

Class A Common Stock, $0.001 par value

1,508

$ 0

1,508

D

Restricted Stock Units (RSU)

(1)

11/03/2026

M

1,178

(7)

(7)

Class A Common Stock, $0.001 par value

1,178

$ 0

3,538

D

Dividend Equivalent Units

(2)

11/03/2026

M

42.973

(2)

(2)

Class A Common Stock, $0.001 par value

42.973

$ 0

129(8)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Nadi Jahida Salim C/O MSC INDUSTRIAL DIRECT CO., INC. 515 BROADHOLLOW ROAD MELVILLE, NY 11747			Senior Vice President, Sales

Signatures

/s/ Jahida Salim Nadi		11/05/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Each RSU represents a contingent right to receive one share of Common Stock.
(2)	The dividend equivalent units accrued with respect to outstanding awards of restricted stock units (RSUs) and vest at the same time(s) as the underlying RSUs. Each dividend equivalent unit represents a contingent right to receive one share of Common Stock.
(3)	Disposition of Class A Common Stock to the Issuer to cover tax withholding obligations arising from the vesting of RSUs and DEUs.
(4)	Represents options to purchase the Issuer's Class A Common Stock, $0.001 par value ("Common Stock").
(5)	An option to purchase 3,138 shares of the Issuer's Common Stock was issued to the Reporting Person under the Issuer's 2023 Omnibus Equity Plan. 784 shares of Common Stock become exercisable on each of November 3, 2027 and November 3, 2028, and 785 shares of Common Stock become exercisable on each of November 3, 2029 and November 3, 2030.
(6)	1,508 RSUs were granted on November 3, 2026. 377 RSUs vest on each of November 3, 2027, November 3, 2028, November 3, 2029, and November 3, 2030, provided that the Reporting Person remains continuously employed by the Issuer through each applicable vesting date. The vested shares will be delivered to the Reporting Person upon vesting.
(7)	4,716 RSUs were granted on November 3, 2025. 1,178 RSUs vested on November 3, 2026. 1,178 RSUs vest on November 3, 2027, and 1,180 RSUs vest on each of November 3, 2028 and November 3, 2029, provided that the Reporting Person remains continuously employed by the Issuer through each applicable vesting date. The vested shares will be delivered to the Reporting Person upon vesting.
(8)	Includes 45.928 dividend equivalent units accrued on November 26, 2025, 49.628 dividend equivalent units accrued on January 28, 2026, 43.300 dividend equivalent units accrued on April 22, 2026 and 33.188 dividend units accrued on July 22, 2026, with respect to outstanding awards of restricted stock units (RSUs). Such dividend equivalent units vest at the same time(s) as the underlying RSUs and represent a contingent right to receive one share of Common Stock.

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