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Allegro Microsystems stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+3.5% to $28.17
Allegro Microsystems (ALGM) stock rose 4% over the last 252 sessions, to $28.17. On the way it reported 4 quarters, its insiders filed 13 open-market trades and 2 Form 144 notices of planned sales, and the company filed 3 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 | Earnings | Earnings: beat the EPS estimate by 6.3% | −6.8% (−6.5% vs SPY) | −12.4% (−11.7% vs SPY) | — |
| Aug 17, 2026 | Form 144 | Form 144: Jennie Raubacher plans to sell $45K | −0.3% (+0.2% vs SPY) | −17.8% (−16.4% vs SPY) | −28.9% (−26.4% vs SPY) |
| Aug 17, 2026 | Insider sale | Raubacher Jennie sold $45K | −0.3% (+0.2% vs SPY) | −17.8% (−16.4% vs SPY) | −28.9% (−26.4% vs SPY) |
| Aug 10, 2026 | Form 144 | Form 144: Erin Hagen plans to sell $101K | −3.0% (−3.0% vs SPY) | +1.4% (+1.0% vs SPY) | −18.3% (−17.3% vs SPY) |
| Aug 10, 2026 | Insider sale | Hagen Erin sold $101K | −3.0% (−3.0% vs SPY) | +1.4% (+1.0% vs SPY) | −18.3% (−17.3% vs SPY) |
| Jul 30, 2026 | Earnings | Earnings: beat the EPS estimate by 8.8% | −1.8% (−3.5% vs SPY) | −1.0% (−6.4% vs SPY) | −11.6% (−17.2% vs SPY) |
| Jun 18, 2026 | 8-K | Directors and officers: departures, appointments, pay | +8.9% (+7.9% vs SPY) | +10.8% (+11.5% vs SPY) | −15.2% (−15.6% vs SPY) |
| Jun 3, 2026 | Insider sale | Madormo Richard sold $264K | +5.4% (+6.1% vs SPY) | −7.6% (−4.6% vs SPY) | +9.8% (+11.5% vs SPY) |
| May 22, 2026 | Insider sale | Coleman Troy sold $206K | +2.8% (+2.4% vs SPY) | +6.9% (+5.0% vs SPY) | +21.7% (+22.7% vs SPY) |
| May 21, 2026 | Insider sale | Webster Roald Graham sold $234K | +0.8% (+0.6% vs SPY) | +14.2% (+12.4% vs SPY) | +32.9% (+32.2% vs SPY) |
| May 18, 2026 | Insider sale | Kent Ian sold $110K | −4.1% (−4.1% vs SPY) | +6.4% (+5.5% vs SPY) | +21.2% (+19.7% vs SPY) |
| May 14, 2026 | Insider sale | Lynch Susan D sold $760K | −2.2% (−3.0% vs SPY) | −3.6% (−3.5% vs SPY) | +9.2% (+9.3% vs SPY) |
| May 13, 2026 | 8-K | Directors and officers: departures, appointments, pay | −2.2% (−3.0% vs SPY) | −3.6% (−3.5% vs SPY) | +9.2% (+9.3% vs SPY) |
| May 11, 2026 | Insider sale | Doogue Michael sold $1.4M | −1.2% (−1.4% vs SPY) | −12.7% (−12.9% vs SPY) | −4.8% (−4.8% vs SPY) |
| May 11, 2026 | Insider sale | Briansky Sharon sold $425K | −1.2% (−1.4% vs SPY) | −12.7% (−12.9% vs SPY) | −4.8% (−4.8% vs SPY) |
| May 7, 2026 | Earnings | Earnings: beat the EPS estimate by 3.8% | −6.9% (−6.6% vs SPY) | −11.1% (−12.2% vs SPY) | −10.2% (−10.7% vs SPY) |
| Mar 2, 2026 | Insider sale | Hagen Erin sold $91K | +0.3% (+0.3% vs SPY) | −13.3% (−11.3% vs SPY) | −26.3% (−18.4% vs SPY) |
| Mar 2, 2026 | Insider sale | Briansky Sharon sold $340K | +0.3% (+0.3% vs SPY) | −13.3% (−11.3% vs SPY) | −26.3% (−18.4% vs SPY) |
| Feb 17, 2026 | Insider sale | Briansky Sharon sold $385K | −1.6% (−1.8% vs SPY) | −9.7% (−9.7% vs SPY) | −27.9% (−26.3% vs SPY) |
| Jan 29, 2026 | Earnings | Earnings: beat the EPS estimate by 4.1% | +9.5% (+9.7% vs SPY) | +10.1% (+11.4% vs SPY) | +5.4% (+6.8% vs SPY) |
| Jan 21, 2026 | 8-K | Material definitive agreement | −0.5% (−1.0% vs SPY) | +1.6% (+0.2% vs SPY) | +13.6% (+13.0% vs SPY) |
| Dec 10, 2025 | Insider sale | Briansky Sharon sold $836K | +1.1% (+0.4% vs SPY) | −9.9% (−9.3% vs SPY) | +7.7% (+5.8% vs SPY) |
Insiders’ record here
In the year on the chart, Allegro Microsystems' insiders reported 0 open-market buys ($0) and 13 sales ($5.2M). Of the 12 old enough to score, 9 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 −9.0%.
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% |
| 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 → Allegro Microsystems: 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.