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Donaldson stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions−0.6% to $84.33
Donaldson (DCI) stock fell 1% over the last 252 sessions, to $84.33. On the way it reported 0 quarters, its insiders filed 6 open-market trades and 4 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 |
|---|---|---|---|---|---|
| Oct 29, 2026 | 8-K | Material definitive agreement | −2.8% (−1.0% vs SPY) | −2.4% (+2.4% vs SPY) | — |
| Sep 4, 2026 | Form 144 | Form 144: Tod Carpenter plans to sell $2.9M | +0.5% (+0.9% vs SPY) | −1.5% (−0.3% vs SPY) | −1.5% (−2.0% vs SPY) |
| Sep 4, 2026 | Insider sale | Carpenter Tod E. sold $2.9M | +0.5% (+0.9% vs SPY) | −1.5% (−0.3% vs SPY) | −1.5% (−2.0% vs SPY) |
| Aug 31, 2026 | Form 144 | Form 144: Tod Carpenter plans to sell $276K | −1.1% (−0.8% vs SPY) | −0.9% (−1.0% vs SPY) | −5.1% (−4.7% vs SPY) |
| Aug 31, 2026 | Insider sale | Carpenter Tod E. sold $276K | −1.1% (−0.8% vs SPY) | −0.9% (−1.0% vs SPY) | −5.1% (−4.7% vs SPY) |
| Aug 27, 2026 | Form 144 | Form 144: Douglas Allan Milroy plans to sell $1.2M | −3.0% (−3.7% vs SPY) | −5.8% (−5.6% vs SPY) | −8.6% (−9.5% vs SPY) |
| Aug 27, 2026 | Form 144 | Form 144: Bradley J Pogalz plans to sell $196K | −3.0% (−3.7% vs SPY) | −5.8% (−5.6% vs SPY) | −8.6% (−9.5% vs SPY) |
| Jul 24, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.4% (+0.4% vs SPY) | +1.5% (+0.4% vs SPY) | −0.1% (−3.3% vs SPY) |
| Apr 14, 2026 | Insider sale | Owens James sold $1.2M | +0.4% (−0.9% vs SPY) | +0.2% (−3.1% vs SPY) | −4.7% (−12.0% vs SPY) |
| Apr 13, 2026 | Insider sale | Owens James sold $527K | +0.3% (−0.7% vs SPY) | +0.6% (−3.8% vs SPY) | −3.5% (−12.0% vs SPY) |
| Apr 10, 2026 | 8-K | Material definitive agreement | +0.3% (−0.7% vs SPY) | +0.6% (−3.8% vs SPY) | −3.5% (−12.0% vs SPY) |
| Apr 10, 2026 | Insider sale | Owens James sold $11K | −0.5% (−0.4% vs SPY) | −2.0% (−5.1% vs SPY) | −3.6% (−11.7% vs SPY) |
| Mar 26, 2026 | Insider sale | Briseno Guillermo sold $1.8M | −2.8% (−1.0% vs SPY) | −1.2% (−1.0% vs SPY) | +2.1% (−6.3% vs SPY) |
| Feb 2, 2026 | 8-K | Material definitive agreement | −0.8% (−1.3% vs SPY) | +6.7% (+6.9% vs SPY) | −8.9% (−7.2% vs SPY) |
| Jan 29, 2026 | 8-K | Directors and officers: departures, appointments, pay | −1.3% (−1.0% vs SPY) | +3.5% (+6.0% vs SPY) | −7.4% (−6.3% vs SPY) |
Insiders’ record here
In the year on the chart, Donaldson's insiders reported 0 open-market buys ($0) and 6 sales ($6.7M). 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 −8.7%.
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% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Donaldson: 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.