Sec Form 4 Filing - Bledsoe Elizabeth @ MSC INDUSTRIAL DIRECT CO INC - 2023-07-28

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Bledsoe Elizabeth 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) SVP & Chief People Officer (Last) (First) (Middle) C/O MSC INDUSTRIAL DIRECT CO., INC., 515 BROADHOLLOW ROAD 3. Date of Earliest Transaction (MM/DD/YY) 07/28/2023 (Street) MELVILLE, NY11747 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 07/28/2023 M 1,653 A $ 79.6 5,051 D Class A Common Stock, $0.001 par value 07/28/2023 M 1,441 A $ 83.21 6,492 D Class A Common Stock, $0.001 par value 07/28/2023 S 3,094 D $ 99.9 ( 1 ) 3,398 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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) ( 2 ) 07/28/2023 M 1,653 ( 3 ) 10/19/2024 Class A Common Stock, $0.001 par value 1,653 $ 79.6 0 D Options (right to buy) ( 2 ) 07/28/2023 M 1,441 ( 4 ) 10/16/2025 Class A Common Stock, $0.001 par value 1,441 $ 83.21 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Bledsoe Elizabeth C/O MSC INDUSTRIAL DIRECT CO., INC. 515 BROADHOLLOW ROAD MELVILLE, NY11747 SVP & Chief People Officer Signatures /s/ Elizabeth Bledsoe 07/31/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the sale of 3,094 shares at $99.90. ( 2 )Represents options to purchase the Issuer's Class A Common Stock, $0.001 par value ("Common Stock"). ( 3 )An option to purchase 1,653 shares of the Issuer's Common Stock was issued to the Reporting Person under the Issuer's 2015 Omnibus Incentive Plan. 413 shares of Common Stock became exercisable on each of October 20, 2018, October 20, 2019 and October 20, 2020, and 414 shares of Common Stock became exercisable on October 20, 2021. ( 4 )An option to purchase 1,441 shares of the Issuer's Common Stock was issued to the Reporting Person under the Issuer's 2015 Omnibus Incentive Plan. 360 shares of Common Stock became exercisable on each of October 17, 2019, October 17, 2020 and October 17, 2021, and 361 shares of Common Stock became exercisable on October 17, 2022.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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