ALLEGRO MICROSYSTEMS (ALGM) stock: insider trades, news & valuation
Heavy sellingShare price and insider trades
ALLEGRO MICROSYSTEMS insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 9 sold $5.2M of ALGM stock on the open market.
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ALGM insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $147K | 2 |
| Q2 2026 | — | 0 | $3.4M | 7 |
| Q1 2026 | — | 0 | $816K | 3 |
| Q4 2025 | — | 0 | $836K | 1 |
Valuation, profit and volume
Summary
Over the past 12 months, 0 ALLEGRO MICROSYSTEMS, INC. insiders reported open-market purchases totaling $0, while 9 insiders reported sales totaling $5.2M. Among insiders with enough purchase history to measure, Susan D Lynch (Director) has the highest Insider Score at 33. 5 of 13 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
ALGM earnings: how the stock reacted
Each quarterly results release (SEC 8-K Item 2.02), the trend before it, insider trades in the 30 days before, and the 2-day market reaction. “E” marks releases on the chart above.
| Release | 15 days before | Insiders, 30 days before | Reaction (2 days) | Next 30 days |
|---|---|---|---|---|
| Jul 30, 2026 | -19.3% | None | -1.7%S&P +2.4% | -13.8% |
| May 7, 2026 | +24.4% | None | -4.7%S&P +0.5% | -5.2% |
| Jan 29, 2026 | +12.2% | None | +6.8%S&P -0.5% | -1.2% |
| Oct 30, 2025 | +11.3% | None | -2.7%S&P -0.8% | -10.8% |
| Jul 31, 2025 | -7.1% | None | -7.7%S&P -2.0% | -1.3% |
| May 8, 2025 | +11.4% | None | +19.5%S&P +0.6% | +29.0% |
| Jan 30, 2025 | -0.3% | None | +5.4%S&P +0.0% | -7.4% |
| Oct 31, 2024 | +8.6% | None | -5.0%S&P -1.5% | +3.0% |
Most companies bar insiders from trading in the weeks before results, so pre-earnings purchases are rare and often made by directors or under pre-set plans. Past reactions don't predict future ones.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 18SEC | Jennie RaubacherDirector | Sell Plan | 1,00013,976 held (−7%) | $45.32 | $45K | -21.5% | — |
| Aug 12SEC | Erin HagenSvp, Chro | Sell Plan | 2,28531,052 held (−7%) | $44.39 | $101K | -19.9% | — |
| Jun 4SEC | Richard MadormoSvp, Worldwide Sales | Sell | 5,00069,687 held (−7%) | $52.72 | $264K | -32.5% | — |
| May 26SEC | Troy ColemanSvp, General Manager, Products | Sell | 4,50077,476 held (−5%) | $45.72 | $206K | -22.2% | — |
| May 22SEC | Roald Graham WebsterVp, Chief Accounting Officer | Sell | 5,21713,106 held (−28%) | $44.89 | $234K | -20.8% | — |
| May 19SEC | Ian KentSvp, Global Operations | Sell | 2,64225,392 held (−9%) | $41.56 | $110K | -14.4% | — |
| May 15SEC | Susan D LynchDirector | Sell | 16,71112,805 held (−57%) | $45.46 | $760K | -21.8% | 33 |
| May 13SEC | Michael DoogueCEO, President | Sell | 30,089252,797 held (−11%) | $47.23 | $1.4M | -24.7% | — |
| May 13SEC | Sharon BrianskySvp, Gc And Secretary | Sell | 8,94875,232 held (−11%) | $47.54 | $425K | -25.2% | — |
| Mar 3SEC | Sharon BrianskySvp, Gc And Secretary | Sell Plan | 9,72784,180 held (−10%) | $35.00 | $340K | +1.6% | — |
| Mar 3SEC | Erin HagenSvp, Chro | Sell | 2,59830,094 held (−8%) | $35.00 | $91K | +1.6% | — |
| Feb 18SEC | Sharon BrianskySvp, Gc And Secretary | Sell Plan | 9,258103,014 held (−8%) | $41.56 | $385K | -14.4% | — |
| Dec 12SEC | Sharon BrianskySvp, Gc And Secretary | Sell Plan | 27,873121,263 held (−19%) | $30.00 | $836K | +18.6% | — |
Insiders at ALLEGRO MICROSYSTEMS, INC.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Sharon BrianskySvp, Gc And Secretary | — | $2.0M | May 13, 2026 | — |
| Michael DoogueCEO, President | — | $1.4M | May 13, 2026 | — |
| Susan D LynchDirector | — | $760K | May 15, 2026 | 33 |
| Richard MadormoSvp, Worldwide Sales | — | $264K | Jun 4, 2026 | — |
| Roald Graham WebsterVp, Chief Accounting Officer | — | $234K | May 22, 2026 | — |
| Troy ColemanSvp, General Manager, Products | — | $206K | May 26, 2026 | — |
| Erin HagenSvp, Chro | — | $192K | Aug 12, 2026 | — |
| Ian KentSvp, Global Operations | — | $110K | May 19, 2026 | — |
| Jennie RaubacherDirector | — | $45K | Aug 18, 2026 | — |
ALGM stock: common questions
Are ALLEGRO MICROSYSTEMS, INC. insiders buying ALGM stock?
In the past 12 months, 0 insiders reported open-market purchases of ALGM worth $0.
Are ALLEGRO MICROSYSTEMS, INC. insiders selling ALGM stock?
9 insiders reported sales worth $5.2M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is ALGM's 52-week range?
Over the past year ALGM has traded between $22.80 and $69.62. It last closed at $35.57 on Oct 9, 2026.