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Accelerant stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+65.0% to $19.89
Accelerant (ARX) stock rose 65% over the last 252 sessions, to $19.89. On the way it reported 4 quarters, its insiders filed 6 open-market trades and 17 Form 144 notices of planned sales, and the company filed 2 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 |
|---|---|---|---|---|---|
| Aug 21, 2026 | Insider sale | Meriwether Karen Sue sold $11K | +0.1% (−0.3% vs SPY) | +0.6% (−0.5% vs SPY) | +1.1% (−0.6% vs SPY) |
| Aug 14, 2026 | 8-K | Material definitive agreement | −0.2% (+0.3% vs SPY) | +0.1% (+1.4% vs SPY) | +1.2% (+3.6% vs SPY) |
| Aug 13, 2026 | Earnings | Earnings: beat the EPS estimate by 96.3% | +36.0% (+35.3% vs SPY) | +36.2% (+36.7% vs SPY) | +37.7% (+38.7% vs SPY) |
| Aug 13, 2026 | Form 144 | Form 144: Nancy Hasley plans to sell $279K | +36.0% (+35.3% vs SPY) | +36.2% (+36.7% vs SPY) | +37.7% (+38.7% vs SPY) |
| Aug 10, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $959K | −3.4% (−3.4% vs SPY) | +45.2% (+44.8% vs SPY) | +46.5% (+47.5% vs SPY) |
| Aug 10, 2026 | Form 144 | Form 144: Francis James O'Neill plans to sell $4.6M | −3.4% (−3.4% vs SPY) | +45.2% (+44.8% vs SPY) | +46.5% (+47.5% vs SPY) |
| Aug 3, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $956K | +1.2% (−0.2% vs SPY) | +4.8% (+1.3% vs SPY) | +50.7% (+48.1% vs SPY) |
| Jul 27, 2026 | Form 144 | Form 144: Matthew Sternberg plans to sell $250K | +2.6% (+2.6% vs SPY) | −18.1% (−19.1% vs SPY) | +32.3% (+29.0% vs SPY) |
| Jul 27, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $1.4M | +2.6% (+2.6% vs SPY) | −18.1% (−19.1% vs SPY) | +32.3% (+29.0% vs SPY) |
| Jul 24, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $425K | +3.3% (+3.2% vs SPY) | −20.7% (−21.1% vs SPY) | +35.2% (+31.6% vs SPY) |
| Jul 20, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $1.1M | +0.4% (+0.6% vs SPY) | +5.1% (+5.7% vs SPY) | +36.8% (+33.0% vs SPY) |
| Jul 17, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $209K | −3.2% (−2.2% vs SPY) | −1.4% (+0.3% vs SPY) | +33.8% (+30.5% vs SPY) |
| Jul 14, 2026 | Form 144 | Form 144: Francis James O'Neill plans to sell $4.8M | −5.1% (−5.5% vs SPY) | +1.8% (+2.7% vs SPY) | −6.3% (−9.2% vs SPY) |
| Jul 13, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $1.0M | +5.4% (+6.2% vs SPY) | +6.7% (+8.3% vs SPY) | −4.9% (−7.2% vs SPY) |
| Jul 6, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $1.1M | −3.8% (−4.7% vs SPY) | −8.6% (−9.9% vs SPY) | −13.6% (−15.3% vs SPY) |
| Jun 29, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $1.0M | −8.4% (−10.1% vs SPY) | −3.6% (−6.6% vs SPY) | +6.9% (+5.3% vs SPY) |
| Jun 23, 2026 | Form 144 | Form 144: Nancy Hasley plans to sell $451K | +1.8% (+3.3% vs SPY) | −2.0% (−1.6% vs SPY) | +4.3% (+4.0% vs SPY) |
| Jun 23, 2026 | Form 144 | Form 144: Jeffrey L Radke plans to sell $1.0M | +1.8% (+3.3% vs SPY) | −2.0% (−1.6% vs SPY) | +4.3% (+4.0% vs SPY) |
| Jun 23, 2026 | Form 144 | Form 144: Francis James O'Neill plans to sell $2.9M | +1.8% (+3.3% vs SPY) | −2.0% (−1.6% vs SPY) | +4.3% (+4.0% vs SPY) |
| Jun 22, 2026 | Form 144 | Form 144: Francis James O'Neill plans to sell $947K | −0.8% (−0.4% vs SPY) | +5.6% (+8.0% vs SPY) | +4.0% (+3.8% vs SPY) |
| May 13, 2026 | Earnings | Earnings: beat the EPS estimate by 8.3% | −7.4% (−7.9% vs SPY) | +20.4% (+21.0% vs SPY) | −2.8% (−2.7% vs SPY) |
| Mar 18, 2026 | 8-K | Directors and officers: departures, appointments, pay | +4.4% (+4.6% vs SPY) | +10.2% (+10.6% vs SPY) | +18.9% (+11.5% vs SPY) |
| Mar 18, 2026 | Earnings | Earnings: beat the EPS estimate by 5.9% | +0.3% (+1.7% vs SPY) | +12.3% (+14.7% vs SPY) | +16.4% (+11.6% vs SPY) |
| Nov 19, 2025 | Insider buy | Lee-Smith Christopher bought $197K | −2.4% (−2.7% vs SPY) | +4.8% (+2.6% vs SPY) | +14.4% (+11.9% vs SPY) |
| Nov 19, 2025 | Insider buy | Gaynor Samuel bought $101K | −2.4% (−2.7% vs SPY) | +4.8% (+2.6% vs SPY) | +14.4% (+11.9% vs SPY) |
| Nov 18, 2025 | Insider buy | ONeill Francis James bought $507K | +5.8% (+6.6% vs SPY) | +5.9% (+5.4% vs SPY) | +19.7% (+18.9% vs SPY) |
| Nov 17, 2025 | Insider buy | Sternberg Matthew David bought $75K | −4.8% (−3.8% vs SPY) | −4.5% (−2.6% vs SPY) | +12.4% (+11.4% vs SPY) |
| Nov 14, 2025 | Insider buy | Radke Jeffrey L bought $999K | −1.5% (−1.4% vs SPY) | −6.8% (−3.9% vs SPY) | +11.2% (+9.9% vs SPY) |
| Nov 12, 2025 | Earnings | Earnings: beat the EPS estimate by 80.6% | +0.5% (+0.4% vs SPY) | +8.9% (+12.3% vs SPY) | +22.7% (+21.8% vs SPY) |
Insiders’ record here
In the year on the chart, Accelerant's insiders reported 5 open-market buys ($1.9M) and 1 sale ($11K). Of the 5 old enough to score, 0 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 −29.6% and after a sale —.
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% |
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 → Accelerant: 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.