Martina McIsaac - Oct 3, 2025 Form 4 Insider Report for MSC INDUSTRIAL DIRECT CO INC (MSM)

Role
President & COO
Signature
/s/ Martina McIsaac
Stock symbol
MSM
Transactions as of
Oct 3, 2025
Transactions value $
-$29,423
Form type
4
Date filed
10/7/2025, 12:15 PM
Previous filing
Nov 6, 2024
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
McIsaac Martina President & COO C/O MSC INDUSTRIAL DIRECT CO., INC., 515 BROADHOLLOW ROAD, MELVILLE /s/ Martina McIsaac 2025-10-07 0001947693

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MSM Class A Common Stock, $0.001 par value Options Exercise $0 +1.17K +26.45% $0.00 5.61K Oct 3, 2025 Direct F1
transaction MSM Class A Common Stock, $0.001 par value Options Exercise $0 +140 +2.49% $0.00 5.75K Oct 3, 2025 Direct F2
transaction MSM Class A Common Stock, $0.001 par value Tax liability -$29.4K -320 -5.57% $91.99 5.43K Oct 3, 2025 Direct F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MSM Restricted Stock Units (RSU) Options Exercise $0 -1.17K -50% $0.00 1.17K Oct 3, 2025 Class A Common Stock, $0.001 par value 1.17K Direct F1, F4
transaction MSM Dividend Equivalent Units Options Exercise $0 -140 -13.78% $0.00 875 Oct 3, 2025 Class A Common Stock, $0.001 par value 140 Direct F2, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each RSU represents a contingent right to receive one share of Common Stock.
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.
F3 Disposition of Class A Common Stock to the Issuer to cover tax withholding obligations arising from the vesting of RSUs and DEUs.
F4 4,692 RSUs were granted on October 3, 2022. 1,173 RSUs vested on each of October 3, 2023, October 3, 2024 and October 3, 2025. 1,173 RSUs vest on October 3, 2026, 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.
F5 Includes 134.917 dividend equivalent units accrued on November 27, 2024, 142.722 dividend equivalent units accrued on January 29, 2025, 153.957 dividend equivalent units accrued on April 23, 2025, and 135.450 dividend equivalent units accrued on July 23, 2025, with respect to outstanding award 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.