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MSC Industrial CEO Martina McIsaac receives vested shares

A further 1,397 RSUs are scheduled to vest on November 4, 2027 and November 4, 2028, provided she remains continuously employed through each applicable vesting date.

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Form Type
4

Rhea-AI Filing Summary

MSC Industrial Direct Co. Inc. (MSM) President & CEO Martina McIsaac reported vesting-related share acquisitions on November 4, 2026: 1,136 and 1,397 RSUs, plus 181.816 and 111.649 dividend equivalent units. The transactions included acquisition of corresponding Class A common shares; 532 and 624 shares were delivered to the issuer for tax withholding at a reported $116.06 per share.

Insider McIsaac Martina
Role President & CEO
Type Security Shares Price Value
Exercise Restricted Stock Units (RSU) F1, F4 1,136 $0.00 $0.00
Exercise Dividend Equivalent Units F2 181.816 $0.00 $0.00
Exercise Restricted Stock Units (RSU) F1, F5 1,397 $0.00 $0.00
Exercise Dividend Equivalent Units F2 111.649 $0.00 $0.00
Exercise Class A Common Stock, $0.001 par value F1 1,136 $0.00 $0.00
Exercise Class A Common Stock, $0.001 par value F2 181.816 $0.00 $0.00
Tax Withholding Class A Common Stock, $0.001 par value F3 531.816 $116.06 $62K
Exercise Class A Common Stock, $0.001 par value F1 1,397 $0.00 $0.00
Exercise Class A Common Stock, $0.001 par value F2 111.649 $0.00 $0.00
Tax Withholding Class A Common Stock, $0.001 par value F3 623.649 $116.06 $72K
Holdings After Transaction: Restricted Stock Units (RSU) — 2,794 contracts (Direct); Dividend Equivalent Units — 1,884 contracts (Direct); Class A Common Stock, $0.001 par value — 14,404 shares (Direct)
Holdings Before and After: Restricted Stock Units (RSU), 5,327 to 2,794 contracts (Direct); Dividend Equivalent Units, 2,177.465 to 1,884 contracts (Direct)
Footnotes (5)
  1. F1. Each RSU represents a contingent right to receive one share of Common Stock.
  2. F2. 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. F3. Disposition of Class A Common Stock to the Issuer to cover tax withholding obligations arising from the vesting of RSUs and DEUs.
  4. F4. 4,541 RSUs were granted on November 4, 2022. 1,135 RSUs vested on each of November 4, 2023, November 4, 2024 and November 4, 2025, and 1,136 RSUs vested on November 4, 2026.
  5. F5. 5,588 RSUs were granted on November 4, 2024. 1,397 RSUs vested on each of November 4, 2025 and November 4, 2026. 1,397 RSUs vest on each of November 4, 2027 and November 4, 2028, 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.
RSUs vested 1,136 RSUs November 4, 2026
RSUs vested 1,397 RSUs November 4, 2026
Dividend equivalent units 181.816 units Vested with the underlying RSUs on November 4, 2026
Dividend equivalent units 111.649 units Vested with the underlying RSUs on November 4, 2026
Shares delivered for tax withholding 532 shares November 4, 2026; reported at $116.06 per share
Shares delivered for tax withholding 624 shares November 4, 2026; reported at $116.06 per share
Reported per-share price $116.06 per share Tax-withholding dispositions on November 4, 2026
Restricted Stock Units (RSU) financial
"Each RSU represents a contingent right to receive one share of Common Stock."
Dividend Equivalent Units financial
"Each dividend equivalent unit represents a contingent right to receive one share of Common Stock."
Dividend equivalent units are bookkeeping credits that mirror cash dividends paid on actual shares, granted to holders of stock-based awards such as restricted stock units or deferred compensation. They matter to investors because they increase a company’s reported employee compensation cost and can lead to issuance of more shares or cash payouts over time, similar to extra pay linked to ownership that affects shareholder dilution and corporate cash flow.
tax withholding obligations financial
"to cover tax withholding obligations arising from the vesting of RSUs and DEUs."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did MSM President & CEO Martina McIsaac receive from vesting?

On November 4, 2026, the reported transactions included acquisition of 1,136 and 1,397 Class A common shares upon vesting of RSUs, plus corresponding shares associated with 181.816 and 111.649 dividend equivalent units.

How many MSM shares were delivered for tax withholding, and at what price?

On November 4, 2026, Martina McIsaac delivered 532 and 624 Class A common shares to MSC Industrial Direct Co. Inc. to cover tax withholding obligations arising from vesting; each transaction was reported at $116.06 per share. The transactions were not reported under a Rule 10b5-1 plan.

When do Martina McIsaac's remaining MSM RSUs vest?

A further 1,397 RSUs are scheduled to vest on November 4, 2027 and November 4, 2028, provided Martina McIsaac remains continuously employed through each applicable vesting date. The vested shares will be delivered to her upon vesting.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4
FORM 4UNITED 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
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
McIsaac Martina

(Last)(First)(Middle)
C/O MSC INDUSTRIAL DIRECT CO., INC.
515 BROADHOLLOW ROAD

(Street)
MELVILLE NEW YORK 11747

(City)(State)(Zip)

UNITED STATES

(Country)
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)
Director10% Owner
XOfficer (give title below)Other (specify below)
President & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
11/04/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Class A Common Stock, $0.001 par value11/04/2026M1,136A$0(1)13,869D
Class A Common Stock, $0.001 par value11/04/2026M181.816A$0(2)14,051D
Class A Common Stock, $0.001 par value11/04/2026F531.816(3)D$116.0613,519D
Class A Common Stock, $0.001 par value11/04/2026M1,397A$0(1)14,916D
Class A Common Stock, $0.001 par value11/04/2026M111.649A$0(2)15,028D
Class A Common Stock, $0.001 par value11/04/2026F623.649(3)D$116.0614,404D
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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units (RSU)(1)11/04/2026M1,136 (4) (4)Class A Common Stock, $0.001 par value1,136$00D
Dividend Equivalent Units(2)11/04/2026M181.816 (2) (2)Class A Common Stock, $0.001 par value181.816$0998D
Restricted Stock Units (RSU)(1)11/04/2026M1,397 (5) (5)Class A Common Stock, $0.001 par value1,397$02,794D
Dividend Equivalent Units(2)11/04/2026M111.649 (2) (2)Class A Common Stock, $0.001 par value111.649$0886D
Explanation of Responses:
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. 4,541 RSUs were granted on November 4, 2022. 1,135 RSUs vested on each of November 4, 2023, November 4, 2024 and November 4, 2025, and 1,136 RSUs vested on November 4, 2026.
5. 5,588 RSUs were granted on November 4, 2024. 1,397 RSUs vested on each of November 4, 2025 and November 4, 2026. 1,397 RSUs vest on each of November 4, 2027 and November 4, 2028, 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.
Remarks:
/s/ Martina McIsaac11/06/2026
** Signature of Reporting PersonDate
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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

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