Updated Jul 16, 2026 · Last SEC filing 2026-07-02
3M CO (MMM) has filed 14 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-02. 4 Form 8-K material event filings were reported by MMM in the last 90 days. 2 Form 144 notices of proposed sale were filed for MMM stock. InsiderAlpha tracks every MMM SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Surgical & Medical Instruments & Apparatus (SIC 3841) |
|---|---|
| SEC CIK | 0000066740 |
| Form 4 filings (90d) | 14 |
|---|---|
| Form 8-K filings (90d) | 4 |
| Form 144 notices (90d) | 2 |
| Latest Form 4 filing | 2026-07-02 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Bauer Wendy A | Group President | F — Tax withholding / forfeiture | 3.6K | $159.96 | $569K | SEC | |
| Bauer Wendy A | Group President | M — Option exercise | 8.0K | $159.96 | $1.27M | SEC | |
| RUMSEY JENNIFER | Director | A — Grant or award | 1.2K | $152.77 | $183K | SEC | |
| Bozeman David P | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| Chow Anne H | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| Fitterling James R | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| Sweet Thomas W | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| Choi Audrey | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| Mitchill Neil G. JR | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| PIZARRO PEDRO | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| Kereere Suzan | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| BROWN THOMAS K | Director | A — Grant or award | 1.4K | $143.34 | $195K | SEC | |
| Reinseth Theresa E | Sr Vice President & CAO | M — Option exercise | 1.4K | $142.50 | $205K | SEC | |
| Reinseth Theresa E | Sr Vice President & CAO | F — Tax withholding / forfeiture | 517 | $142.50 | $74K | SEC | |
| Brown William M | Chairman & CEO | M — Option exercise | 8.6K | $142.50 | $1.22M | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for 3M CO (MMM). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Brown William M | 3 | $1.78M |
| Banovetz John Patrick | 3 | $2.78M |
| Reinseth Theresa E | 3 | $279K |
| Bauer Wendy A | 3 | $1.84M |
| Kereere Suzan | 1 | $195K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in MMM insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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