Gregory Haefele Clark - 08 Aug 2025 Form 3 Insider Report for MSC INDUSTRIAL DIRECT CO INC (MSM)

Role: VP & Interim CFO
Signature: /s/ Gregory Haefele Clark
Issuer symbol: MSM
Transactions as of: 08 Aug 2025
Net transactions value: $0
Form type: 3
Filing time: 18 Aug 2025, 10:57:57 UTC
Next filing: 05 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Clark Gregory Haefele	VP & Interim CFO	C/O MSC INDUSTRIAL DIRECT CO., INC., 515 BROADHOLLOW ROAD, MELVILLE	/s/ Gregory Haefele Clark	15 Aug 2025	0001800680

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	MSM	Class A Common Stock, $0.001 par value						0	08 Aug 2025	Direct

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
holding	MSM	Restricted Stock Units (RSU)							08 Aug 2025	Class A Common Stock, $0.001 par value	221		Direct	F1, F2
holding	MSM	Restricted Stock Units (RSU)							08 Aug 2025	Class A Common Stock, $0.001 par value	454		Direct	F2, F3
holding	MSM	Restricted Stock Units (RSU)							08 Aug 2025	Class A Common Stock, $0.001 par value	576		Direct	F2, F4
holding	MSM	Restricted Stock Units (RSU)							08 Aug 2025	Class A Common Stock, $0.001 par value	931		Direct	F2, F5
holding	MSM	Dividend Equivalent Units							08 Aug 2025	Class A Common Stock, $0.001 par value	175		Direct	F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	882 RSUs were granted on November 5, 2021. 220 RSUs vested on each of November 5, 2022 and November 5, 2023 and 221 RSUs vested on November 5, 2024. 221 RSUs vest on November 5, 2025, 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.
F2	Each RSU represents a contingent right to receive one share of Common Stock.
F3	908 RSUs were granted on November 4, 2022. 227 RSUs vested on each of November 4, 2023 and November 4, 2024. 227 RSUs vest on each of November 4, 2025 and November 4, 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.
F4	767 RSUs were granted on November 3, 2023. 191 RSUs vested on November 3, 2024. 192 RSUs vest on each of November 3, 2025, November 3, 2026, and November 3, 2027, 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	931 RSUs were granted on November 4, 2024. 232 RSUs vest on November 4, 2025, and 233 RSUs vest on each of November 4, 2026, 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.
F6	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.