Reinseth Theresa E 4

What Happened
Theresa E. Reinseth, Senior Vice President & Chief Accounting Officer of 3M Co. (MMM), sold 924 shares in an open-market transaction on July 23, 2026 at $169.42 per share, generating proceeds of approximately $156,544. This filing reports a sale (code S), which is a disposition of existing shares rather than a purchase or option exercise.

Key Details

• Transaction date and price: 2026-07-23, 924 shares at $169.42 each.
• Proceeds: ~ $156,544.
• Shares owned after transaction: not specified in the provided filing.
• Filing date / timeliness: Reported on 2026-07-24 (filed promptly the day after the transaction).
• Footnote: F1 — includes shares acquired pursuant to 3M's Dividend Reinvestment Plan.
• Transaction type: Open-market sale (not an option exercise, gift, or award).

Context
Insider sales are common for routine reasons (e.g., diversification, personal liquidity, tax planning) and do not by themselves indicate management’s view of the company. This disclosure is a straightforward sale of previously held shares; no derivative activity or 10b5-1 plan was disclosed in the filing.