Allegro Microsystems, Inc.
A maker of the tiny magnetic sensors and power chips that quietly run modern life, Allegro MicroSystems builds the components that measure wheel speed for anti-lock brakes, position for electric power steering, and current for everything from car motors to AI data centers. The company traces back to the semiconductor division of Sprague Electric, spun off in 1990 and bought by Japan's Sanken Electric. Fun fact: the "Allegro" name means "fast and lively" in music — fitting for chips that track motion, and the company still calls New Hampshire home.
Sold 38.77M
Granted 379.0K · Bought 15.0K · Sold 30.1K
Granted 116.9K · Bought 6.0K
Granted 50.9K · Sold 15.0K
Granted 214.7K · Bought 1.5K
Granted 12.8K
Granted 65.4K
Granted 112.3K · Sold 55.8K
Granted 91.6K · Sold 4.5K
Granted 57.4K · Sold 5.0K
Granted 12.8K
Granted 53.7K · Sold 7.6K
Granted 6.9K
Granted 17.7K · Sold 2.6K
Granted 12.8K · Sold 25.4K
Granted 17.5K
Granted 15.0K
Granted 27.4K · Sold 13.5K
Granted 12.8K · Bought 350 · Sold 16.7K
Granted 10.0K
Granted 10.2K
Granted 1.1K
Granted 594
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Sanken Electric Co., Ltd.10% owner · 2 transactions | -39.4% | 59.73Mas of Aug 2024 | — | — | 38.77M |
| Doogue MichaelPresident and CEO, Director · 17 transactions | +71% | 531.9K | 379.0K | 15.0K | 30.1K |
| Nargolwala Vineet APresident and CEO, Director · 8 transactions | +18.2% | 355.9Kas of Nov 2024 | 116.9K | 6.0K | — |
| Glover Max R.SVP of Worldwide Sales · 6 transactions | -21.2% | 266.3Kas of Nov 2024 | 50.9K | — | 15.0K |
| D'Antilio DerekEVP, CFO & Treasurer · 14 transactions | +68.9% | 238.8K | 214.7K | 1.5K | — |
| Suzuki YoshihiroDirector · 2 transactions | +6.4% | 213.6Kas of Aug 2025 | 12.8K | — | — |
| Valente JoanneSVP, CHRO · 1 transaction | -10.8% | 126.7Kas of Nov 2023 | — | — | — |
| Narayan SumanSVP, Products · 7 transactions | +72.2% | 123.1Kas of Aug 2024 | 65.4K | — | — |
| Briansky SharonSVP, GC and Secretary · 18 transactions | -10.6% | 79.8K | 112.3K | — | 55.8K |
| Coleman TroySVP, General Manager, Products · 4 transactions | — | 77.5K | 91.6K | — | 4.5K |
| Madormo RichardSVP, Worldwide Sales · 5 transactions | — | 69.7K | 57.4K | — | 5.0K |
| Martin Joseph RDirector · 2 transactions | +57.2% | 35.2Kas of Aug 2025 | 12.8K | — | — |
| Hagen ErinSVP, CHRO · 11 transactions | — | 33.3K | 53.7K | — | 7.6K |
| Aldrich David JDirector · 1 transaction | +34.6% | 26.7Kas of Aug 2024 | 6.9K | — | — |
| Kent IanSVP, Global Operations · 4 transactions | — | 25.4K | 17.7K | — | 2.6K |
| Lury Richard R.Director · 6 transactions | -40.1% | 18.9Kas of Aug 2025 | 12.8K | — | 25.4K |
| Puma Mary GDirector · 3 transactions | — | 17.5Kas of Aug 2025 | 17.5K | — | — |
| Raubacher JennieDirector · 3 transactions | — | 15.0Kas of Aug 2025 | 15.0K | — | — |
| Webster Roald GrahamVP, Chief Accounting Officer · 12 transactions | +261.4% | 13.1K | 27.4K | — | 13.5K |
| Lynch Susan DDirector · 4 transactions | -21.7% | 12.8K | 12.8K | 350 | 16.7K |
| Palepu Krishna G.Director · 2 transactions | — | 10.5Kas of Aug 2025 | 10.0K | — | — |
| Schorr Paul IVDirector · 2 transactions | — | 10.2Kas of Aug 2024 | 10.2K | — | — |
| Willett RobertDirector · 1 transaction | — | 1.1K | 1.1K | — | — |
| White Brian CDirector · 1 transaction | — | 594 | 594 | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 3 years: -38.92M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.