Robert B. Aarnes - 22 Jan 2026 Form 4 Insider Report for MSC INDUSTRIAL DIRECT CO INC (MSM)

Reporting relationship: Director
Issuer ticker: MSM
Reported as of: 22 Jan 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 Jan 2026, 16:17:09 UTC
Prior SEC filing: 16 Dec 2025
Next SEC filing: 26 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Robert B. Aarnes

Key filing fact

Robert B. Aarnes filed Form 4 for MSC INDUSTRIAL DIRECT CO INC (MSM) on 26 Jan 2026.

Key facts

This page summarizes Robert B. Aarnes's Form 4 filing for MSC INDUSTRIAL DIRECT CO INC (MSM).
4 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 26 Jan 2026, 16:17.

Change

Previous filing in this sequence was filed on 16 Dec 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001754267 Primary reporting owner

Aarnes Robert B

Relationship: Director
Address: C/O MSC INDUSTRIAL DIRECT CO., INC., 515 BROADHOLLOW ROAD, MELVILLE
Signature: /s/ Robert B. Aarnes
Signature date: 26 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MSM transaction

Class A Common Stock, $0.001 par value

Options Exercise

Transaction value: $0
Shares: +799
Change %
Price: $0.000000
Shares after: 799
Date: 22 Jan 2026
Ownership: Direct
Footnotes: F1

MSM transaction

Class A Common Stock, $0.001 par value

Options Exercise

Transaction value: $0
Shares: +24
Change %: +3%
Price: $0.000000
Shares after: 823
Date: 22 Jan 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MSM transaction Derivative

Restricted Stock Units (RSU)

Options Exercise

Transaction value: $0
Shares: -799
Change %: -50%
Price: $0.000000
Shares after: 799
Date: 22 Jan 2026
Ownership: Direct
Underlying class: Class A Common Stock, $0.001 par value
Underlying amount: 799
Exercise price
Footnotes: F1, F3

MSM transaction Derivative

Dividend Equivalent Units

Options Exercise

Transaction value: $0
Shares: -24
Change %: -49%
Price: $0.000000
Shares after: 25
Date: 22 Jan 2026
Ownership: Direct
Underlying class: Class A Common Stock, $0.001 par value
Underlying amount: 24
Exercise price
Footnotes: F2, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Each RSU represents a contingent right to receive one share of Common Stock.

Footnote 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.

Footnote F3

1,598 RSUs were granted on January 22, 2025. 799 RSUs vested on January 22, 2026. 799 RSUs vest on January 22, 2027, provided that the Reporting Person continues to serve as Outside Director through the applicable vesting date. The vested shares will be delivered to the Reporting Person upon vesting.

Footnote F4

Includes 17.818 dividend equivalent units accrued on April 23, 2025, 15.676 dividend equivalent units accrued on July 23, 2025, and 15.888 dividend equivalent units accrued on November 26, 2025 with respect to the 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.