Julie Valsa Rockett - 17 Dec 2025 Form 4 Insider Report for MSC INDUSTRIAL DIRECT CO INC (MSM)

Role: VP, Chief People Officer
Signature: /s/ Julie Rockett
Issuer symbol: MSM
Transactions as of: 17 Dec 2025
Net transactions value: -$589
Form type: 4
Filing time: 18 Dec 2025, 16:11:39 UTC
Previous filing: 07 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Rockett Julie Valsa	VP, Chief People Officer	C/O MSC INDUSTRIAL DIRECT CO., INC., 515 BROADHOLLOW ROAD, MELVILLE	/s/ Julie Rockett	18 Dec 2025	0002086182

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	+20	+1.4%	$0.000000	1,470	17 Dec 2025	Direct	F1
transaction	MSM	Class A Common Stock, $0.001 par value	Options Exercise	$0	+1	+0.06%	$0.000000	1,471	17 Dec 2025	Direct	F2
transaction	MSM	Class A Common Stock, $0.001 par value	Tax liability	$589	-7	-0.47%	$86.10	1,464	17 Dec 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	-20	-33%	$0.000000	41	17 Dec 2025	Class A Common Stock, $0.001 par value	20		Direct	F1, F4
transaction	MSM	Dividend Equivalent Units	Options Exercise	$0	-1	-1.5%	$0.000000	54	17 Dec 2025	Class A Common Stock, $0.001 par value	1		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	61 RSUs were granted on December 17, 2024. 20 RSUs vested on December 17, 2025. 20 RSUs vest on December 17, 2026, and 21 RSUs vest on December 17, 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	Includes 12.696 dividend equivalent units accrued on November 26, 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.