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3M stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+15.1% to $185.15
3M (MMM) stock rose 15% over the last 252 sessions, to $185.15. On the way it reported 0 quarters, its insiders filed 5 open-market trades and 5 Form 144 notices of planned sales, and the company filed 5 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Nov 4, 2026 | 8-K | Material definitive agreement | −3.2% (+1.3% vs SPY) | — | — |
| Aug 19, 2026 | 8-K | Material definitive agreement | −0.2% (−0.4% vs SPY) | −0.4% (−0.2% vs SPY) | −8.9% (−8.3% vs SPY) |
| Aug 5, 2026 | Form 144 | Form 144: Rodriguez Beatriz Karina Chavez plans to sell $663K | +0.3% (+0.5% vs SPY) | +0.9% (+1.0% vs SPY) | −6.8% (−6.0% vs SPY) |
| Aug 5, 2026 | Insider sale | Chavez Rodriguez Beatriz Karina sold $663K | +0.3% (+0.5% vs SPY) | +0.9% (+1.0% vs SPY) | −6.8% (−6.0% vs SPY) |
| Jul 23, 2026 | Form 144 | Form 144: John Patrick Banovetz plans to sell $1.3M | −0.7% (+0.6% vs SPY) | +4.1% (+6.6% vs SPY) | +4.2% (+2.2% vs SPY) |
| Jul 23, 2026 | Form 144 | Form 144: Theresa E Reinseth plans to sell $157K | −0.7% (+0.6% vs SPY) | +4.1% (+6.6% vs SPY) | +4.2% (+2.2% vs SPY) |
| Jul 23, 2026 | Insider sale | Reinseth Theresa E sold $157K | −0.7% (+0.6% vs SPY) | +4.1% (+6.6% vs SPY) | +4.2% (+2.2% vs SPY) |
| Jul 23, 2026 | Insider sale | Banovetz John Patrick sold $1.3M | −0.7% (+0.6% vs SPY) | +4.1% (+6.6% vs SPY) | +4.2% (+2.2% vs SPY) |
| Jul 22, 2026 | Form 144 | Form 144: Kevin H Rhodes plans to sell $1.3M | 0.0% (+0.1% vs SPY) | +6.6% (+7.6% vs SPY) | +5.6% (+2.9% vs SPY) |
| Jul 22, 2026 | Form 144 | Form 144: Christian T JR Goralski plans to sell $836K | 0.0% (+0.1% vs SPY) | +6.6% (+7.6% vs SPY) | +5.6% (+2.9% vs SPY) |
| Jul 22, 2026 | Insider sale | Rhodes Kevin H sold $1.3M | 0.0% (+0.1% vs SPY) | +6.6% (+7.6% vs SPY) | +5.6% (+2.9% vs SPY) |
| Jul 22, 2026 | Insider sale | Goralski Christian T JR sold $836K | 0.0% (+0.1% vs SPY) | +6.6% (+7.6% vs SPY) | +5.6% (+2.9% vs SPY) |
| Jun 8, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.1% (−0.2% vs SPY) | +2.9% (+2.3% vs SPY) | +0.6% (−0.7% vs SPY) |
| May 6, 2026 | 8-K | Material definitive agreement | +2.6% (+1.2% vs SPY) | +0.3% (−1.7% vs SPY) | +7.3% (+2.7% vs SPY) |
| Feb 5, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.8% (+2.0% vs SPY) | +5.4% (+4.5% vs SPY) | −6.1% (−4.0% vs SPY) |
Insiders’ record here
In the year on the chart, 3M's insiders reported 0 open-market buys ($0) and 5 sales ($4.3M). Of the 4 old enough to score, 4 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was — and after a sale −1.7%.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
| 1.01 Material definitive agreement | 23,525 | 0.0% | 51% | +1.0% | ±1.4% |
| 2.03 New debt or off-balance-sheet obligation | 13,268 | 0.0% | 50% | +1.2% | ±1.3% |
| 1.02 Termination of a material agreement | 2,368 | 0.0% | 51% | +1.1% | ±1.5% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
3M: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.