Thomas K. Brown - 12 May 2026 Form 4 Insider Report for 3M CO (MMM)

Reporting relationship: Director
Issuer ticker: MMM
Reported as of: 12 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 May 2026, 16:19:30 UTC
Prior SEC filing: 09 Oct 2025
Next SEC filing: 03 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Patricia L. Meagher, attorney-in-fact for Thomas K. Brown

Key filing fact

Thomas K. Brown filed Form 4 for 3M CO (MMM) on 13 May 2026.

Key facts

This page summarizes Thomas K. Brown's Form 4 filing for 3M CO (MMM).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 13 May 2026, 16:19.

Change

Previous filing in this sequence was filed on 09 Oct 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 0001190838 Primary reporting owner

BROWN THOMAS K

Relationship: Director
Address: 3M CENTER, ST. PAUL
Signature: /s/ Patricia L. Meagher, attorney-in-fact for Thomas K. Brown
Signature date: 13 May 2026

Reported non-derivative transactions

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

MMM transaction

Common Stock

Award

Transaction value
Shares: +1,360
Change %: +8.3%
Price: $143.34^*
Shares after: 17,687
Date: 12 May 2026
Ownership: By Corporation
Footnotes: F1, F2

MMM holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,294
Date: 12 May 2026
Ownership: Direct

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Includes acquisition of deferred dividend reinvestment shares pursuant to 3M's Compensation Plan for Non-Employee Directors.

Footnote F2

This non-employee director has elected to defer all or a portion of compensation otherwise payable in cash or stock to a common stock equivalents account under the terms of 3M's Compensation Plan for Non-employee Directors and has no voting or investment powers with respect to such account.