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Allison Transmission Holdings stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+44.9% to $116.88
Allison Transmission Holdings (ALSN) stock rose 45% over the last 252 sessions, to $116.88. On the way it reported 4 quarters, its insiders filed 4 open-market trades and 3 Form 144 notices of planned sales, and the company filed 4 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 2, 2026 | Earnings | Earnings: beat the EPS estimate by 17.0% | +4.6% (+5.0% vs SPY) | +7.9% (+10.6% vs SPY) | — |
| Aug 21, 2026 | Form 144 | Form 144: David S. Graziosi plans to sell $3.6M | +3.4% (+2.9% vs SPY) | +0.2% (−0.9% vs SPY) | −8.1% (−9.7% vs SPY) |
| Aug 21, 2026 | Insider sale | Graziosi David S. sold $3.6M | +3.4% (+2.9% vs SPY) | +0.2% (−0.9% vs SPY) | −8.1% (−9.7% vs SPY) |
| Aug 11, 2026 | Form 144 | Form 144: Eric C. Scroggins plans to sell $131K | +0.4% (+0.7% vs SPY) | +2.1% (+2.1% vs SPY) | +3.1% (+4.5% vs SPY) |
| Aug 11, 2026 | Insider sale | Scroggins Eric C. sold $131K | +0.4% (+0.7% vs SPY) | +2.1% (+2.1% vs SPY) | +3.1% (+4.5% vs SPY) |
| Aug 10, 2026 | Form 144 | Form 144: G Frederick Bohley plans to sell $485K | +4.6% (+4.7% vs SPY) | +5.7% (+5.3% vs SPY) | +9.6% (+10.5% vs SPY) |
| Aug 10, 2026 | Insider sale | Bohley G Frederick sold $485K | +4.6% (+4.7% vs SPY) | +5.7% (+5.3% vs SPY) | +9.6% (+10.5% vs SPY) |
| Aug 3, 2026 | Earnings | Earnings: beat the EPS estimate by 4.5% | +1.5% (+0.1% vs SPY) | +3.7% (+0.3% vs SPY) | +9.5% (+6.9% vs SPY) |
| Jun 16, 2026 | 8-K | Material definitive agreement | −1.8% (−0.6% vs SPY) | −1.1% (+0.9% vs SPY) | −6.3% (−5.6% vs SPY) |
| May 8, 2026 | 8-K | Directors and officers: departures, appointments, pay | −0.4% (−0.6% vs SPY) | −6.0% (−6.2% vs SPY) | −4.9% (−4.9% vs SPY) |
| May 8, 2026 | Insider sale | Mell Scott A sold $284K | +0.9% (+0.1% vs SPY) | −0.5% (−2.8% vs SPY) | −6.1% (−7.1% vs SPY) |
| May 4, 2026 | Earnings | Earnings: beat the EPS estimate by 22.7% | −1.7% (−1.3% vs SPY) | −5.5% (−7.8% vs SPY) | −12.0% (−17.2% vs SPY) |
| Feb 23, 2026 | Earnings | Earnings: missed the EPS estimate by -21.1% | −1.7% (−0.7% vs SPY) | +5.3% (+5.8% vs SPY) | −3.4% (+1.5% vs SPY) |
| Jan 2, 2026 | 8-K | Material definitive agreement | +1.1% (+0.9% vs SPY) | +4.3% (+3.2% vs SPY) | +11.9% (+9.9% vs SPY) |
| Nov 24, 2025 | 8-K | Material definitive agreement | +2.9% (+1.9% vs SPY) | +4.5% (+2.6% vs SPY) | +16.6% (+13.1% vs SPY) |
Insiders’ record here
In the year on the chart, Allison Transmission Holdings' insiders reported 0 open-market buys ($0) and 4 sales ($4.5M). Of the 1 old enough to score, 1 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 −4.5%.
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 |
|---|---|---|---|---|---|
| 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% |
| 2.01 Completed acquisition or disposition | 2,671 | +0.1% | 52% | +1.2% | ±1.6% |
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → Allison Transmission Holdings: 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.