Kimberly Shacklett - 03 Nov 2025 Form 4 Insider Report for MSC INDUSTRIAL DIRECT CO INC (MSM)

Role: SVP, Customer Experience
Signature: /s/ Kimberly Shacklett
Issuer symbol: MSM
Transactions as of: 03 Nov 2025
Net transactions value: -$13,382
Form type: 4
Filing time: 04 Nov 2025, 18:11:51 UTC
Previous filing: 11 Jul 2025
Next filing: 06 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Shacklett Kimberly	SVP, Customer Experience	C/O MSC INDUSTRIAL DIRECT CO., INC., 515 BROADHOLLOW ROAD, MELVILLE	/s/ Kimberly Shacklett	04 Nov 2025	0001923635

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	+511	+3.5%	$0.000000	15,168	03 Nov 2025	Direct	F1
transaction	MSM	Class A Common Stock, $0.001 par value	Options Exercise	$0	+41	+0.27%	$0.000000	15,209	03 Nov 2025	Direct	F2
transaction	MSM	Class A Common Stock, $0.001 par value	Tax liability	$13,382	-158	-1%	$84.79	15,051	03 Nov 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)	Award	$0	+2,358		$0.000000	2,358	03 Nov 2025	Class A Common Stock, $0.001 par value	2,358		Direct	F1, F4
transaction	MSM	Restricted Stock Units (RSU)	Options Exercise	$0	-511	-33%	$0.000000	1,023	03 Nov 2025	Class A Common Stock, $0.001 par value	511		Direct	F1, F5
transaction	MSM	Dividend Equivalent Units	Options Exercise	$0	-41	-11%	$0.000000	317	03 Nov 2025	Class A Common Stock, $0.001 par value	41		Direct	F2, F6

* 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	2,358 RSUs were granted on November 3, 2025. 589 RSUs vest on each of November 3, 2026 and November 3, 2027, and 590 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.
F5	2,045 RSUs were granted on November 3, 2023. 511 RSUs vested on each of November 3, 2024 and November 3, 2025. 511 RSUs vest on November 3, 2026 and 512 RSUs vest on 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.
F6	Includes 51.717 dividend equivalent units accrued on November 27, 2024, 54.708 dividend equivalent units accrued on January 29, 2025, 59.017 dividend equivalent units accrued on April 23, 2025 and 51.921 dividend units accrued on July 23, 2025 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.