3M CO (MMM) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-05 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: 3M CO (MMM) CIK: 0000066740 --- Reporting Owner --- Name: RUMSEY JENNIFER CIK: 0001651631 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-06-05 | Code: A (Grant or award) Shares: +1,195.997 | Price: $152.77 Total Value: $182,712.46 Shares Owned After: 1,195.997 | Ownership: I (Indirect) | Nature: By Corporation Footnotes: [F1] 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. --- Footnotes (Complete Index) --- F1: 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. --- Signature --- /s/ /s/ Patricia L. Meagher, attorney-in-fact for Jennifer W. Rumsey (2026-06-09)