Allegro Microsystems, Inc. (ALGM) · Insider trading
What Allegro Microsystems's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$0
0 insiders, 0 trades
Sold, 12 months
$5.22M
9 insiders, 0% under a plan
Net, 12 months
−$5.22M
bought less sold
Latest filing
2026-08-18
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Briansky SharonSVP, GC and Secretary | – | $1.99M | 4 | 2026-05-11 | 75,232 |
| Doogue MichaelDirector, President and CEO | $285,000 | $1.42M | 2 | 2026-05-11 | – |
| Lynch Susan DDirector | – | $759,682 | 1 | 2026-05-14 | 12,805 |
| Lury Richard R.Director | – | $506,097 | 3 | 2025-08-12 | 18,857 |
| Webster Roald GrahamVP, Chief Accounting Officer | – | $505,399 | 2 | 2026-05-21 | 13,106 |
| Hagen ErinSVP, CHRO | – | $349,602 | 3 | 2026-08-10 | 31,052 |
| Madormo RichardSVP, Worldwide Sales | – | $263,600 | 1 | 2026-06-03 | 69,687 |
| Coleman TroySVP, General Manager, Products | – | $205,740 | 1 | 2026-05-22 | 77,476 |
| Kent IanSVP, Global Operations | – | $109,802 | 1 | 2026-05-18 | 25,392 |
| Nargolwala Vineet ADirector, President and CEO | $99,446 | – | 2 | 2024-11-05 | 355,913 |
| Raubacher JennieDirector | – | $45,320 | 1 | 2026-08-17 | 13,976 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-17 | Raubacher JennieDirector | Sale | 1,000 | 45.32 | $45,320 | 13,976 | Form 4 |
| 2026-08-10 | Hagen ErinSVP, CHRO | Sale | 2,285 | 44.39 | $101,431 | 31,052 | Form 4 |
| 2026-06-03 | Madormo RichardSVP, Worldwide Sales | Sale | 5,000 | 52.72 | $263,600 | 69,687 | Form 4 |
| 2026-05-22 | Coleman TroySVP, General Manager, Products | Sale | 4,500 | 45.72 | $205,740 | 77,476 | Form 4 |
| 2026-05-21 | Webster Roald GrahamVP, Chief Accounting Officer | Sale | 5,217 | 44.89 | $234,191 | 13,106 | Form 4 |
| 2026-05-18 | Kent IanSVP, Global Operations | Sale | 2,642 | 41.56 | $109,802 | 25,392 | Form 4 |
| 2026-05-14 | Lynch Susan DDirector | Sale | 16,711 | 45.46 | $759,682 | 12,805 | Form 4 |
| 2026-05-11 | Doogue MichaelDirector, President and CEO | Saleindirect | 30,089 | 47.23 | $1.42M | 252,797 | Form 4 |
| 2026-05-11 | Briansky SharonSVP, GC and Secretary | Sale | 8,948 | 47.54 | $425,388 | 75,232 | Form 4 |
| 2026-03-02 | Hagen ErinSVP, CHRO | Sale | 2,598 | 35.00 | $90,930 | 30,094 | Form 4 |
| 2026-03-02 | Briansky SharonSVP, GC and Secretary | Sale | 9,727 | 35.00 | $340,445 | 84,180 | Form 4 |
| 2026-02-17 | Briansky SharonSVP, GC and Secretary | Sale | 9,258 | 41.56 | $384,762 | 103,014 | Form 4 |
| 2025-12-10 | Briansky SharonSVP, GC and Secretary | Sale | 27,873 | 30.00 | $836,190 | 121,263 | Form 4 |
| 2025-08-22 | Webster Roald GrahamVP, Chief Accounting Officer | Sale | 8,266 | 32.81 | $271,207 | 17,300 | Form 4 |
| 2025-08-12 | Lury Richard R.Director | Sale | 7,000 | 31.81 | $222,670 | 18,857 | Form 4 |
| 2025-08-04 | Hagen ErinSVP, CHRO | Sale | 5,043 | 31.18 | $157,241 | 34,688 | Form 4 |
| 2025-06-11 | Lury Richard R.Director | Sale | 3,100 | 30.45 | $94,395 | 19,925 | Form 4 |
| 2025-06-04 | Lury Richard R.Director | Sale | 6,849 | 27.60 | $189,032 | 23,025 | Form 4 |
| 2024-11-18 | Doogue MichaelSVP, CTO | Buyindirect | 15,000 | 19.00 | $285,000 | 246,086 | Form 4 |
| 2024-11-05 | Nargolwala Vineet ADirector, President and CEO | Buy | 4,800 | 19.89 | $95,472 | 355,913 | Form 4 |
| 2024-11-05 | Nargolwala Vineet ADirector, President and CEO | Buy | 200 | 19.87 | $3,974 | 356,113 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
42 × grant or award20 × shares withheld for tax1 × returned to the company
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-08-05 | Palepu Krishna G.Director | Grant or award A | +4,251 | – | 14,212 | Form 4 |
| 2026-08-05 | Puma Mary GDirector | Grant or award A | +4,251 | – | 21,734 | Form 4 |
| 2026-08-05 | Martin Joseph RDirector | Grant or award A | +4,251 | – | 39,430 | Form 4 |
| 2026-08-05 | Suzuki YoshihiroDirector | Grant or award A | +4,251 | – | 217,811 | Form 4 |
| 2026-06-17 | White Brian CDirector | Grant or award A | +594 | – | 594 | Form 4 |
| 2026-05-16 | Coleman TroySVP, General Manager, Products | Shares withheld for tax F | −9,670 | 43.10 | 81,976 | Form 4 |
| 2026-05-16 | Briansky SharonSVP, GC and Secretary | Shares withheld for tax F | −13,942 | 43.10 | 79,753 | Form 4 |
| 2026-05-16 | Doogue MichaelDirector, President and CEO | Shares withheld for tax F | −60,508 | 43.10 | 279,076 | Form 4 |
| 2026-05-16 | Webster Roald GrahamVP, Chief Accounting Officer | Shares withheld for tax F | −4,277 | 43.10 | 18,323 | Form 4 |
| 2026-05-16 | Madormo RichardSVP, Worldwide Sales | Shares withheld for tax F | −5,439 | 43.10 | 74,687 | Form 4 |
| 2026-05-16 | D'Antilio DerekEVP, CFO & Treasurer | Shares withheld for tax F | −37,840 | 43.10 | 238,813 | Form 4 |
| 2026-05-16 | Hagen ErinSVP, CHRO | Shares withheld for tax F | −5,815 | 43.10 | 33,337 | Form 4 |
| 2026-05-16 | Kent IanSVP, Global Operations | Shares withheld for tax F | −2,345 | 43.10 | 28,034 | Form 4 |
| 2026-05-13 | Webster Roald GrahamVP, Chief Accounting Officer | Grant or award A | +4,756 | – | 22,056 | Form 4 |
| 2026-05-13 | Webster Roald GrahamVP, Chief Accounting Officer | Grant or award A | +544 | – | 22,600 | Form 4 |
| 2026-05-13 | Hagen ErinSVP, CHRO | Grant or award A | +9,058 | – | 39,152 | Form 4 |
| 2026-05-13 | Doogue MichaelDirector, President and CEO | Grant or award A | +77,135 | – | 255,884 | Form 4 |
| 2026-05-13 | Doogue MichaelDirector, President and CEO | Grant or award A | +83,700 | – | 339,584 | Form 4 |
| 2026-05-13 | Coleman TroySVP, General Manager, Products | Grant or award A | +18,116 | – | 91,646 | Form 4 |
| 2026-05-13 | Briansky SharonSVP, GC and Secretary | Grant or award A | +15,852 | – | 91,084 | Form 4 |
| 2026-05-13 | Briansky SharonSVP, GC and Secretary | Grant or award A | +2,611 | – | 93,695 | Form 4 |
| 2026-05-13 | Madormo RichardSVP, Worldwide Sales | Grant or award A | +19,815 | – | 80,126 | Form 4 |
| 2026-05-13 | D'Antilio DerekEVP, CFO & Treasurer | Grant or award A | +29,439 | – | 246,215 | Form 4 |
| 2026-05-13 | D'Antilio DerekEVP, CFO & Treasurer | Grant or award A | +30,438 | – | 276,653 | Form 4 |
| 2026-05-13 | Kent IanSVP, Global Operations | Grant or award A | +8,492 | – | 30,379 | Form 4 |
| 2026-05-13 | Willett RobertDirector | Grant or award A | +1,094 | – | 1,094 | Form 4 |
| 2026-03-24 | Madormo RichardSVP, Worldwide Sales | Returned to the company D | −6,498 | 32.58 | 60,311 | Form 4 |
| 2026-02-27 | Hagen ErinSVP, CHRO | Shares withheld for tax F | −1,996 | 36.47 | 32,692 | Form 4 |
| 2026-02-27 | D'Antilio DerekEVP, CFO & Treasurer | Shares withheld for tax F | −9,995 | 36.47 | 216,776 | Form 4 |
| 2026-02-27 | Briansky SharonSVP, GC and Secretary | Shares withheld for tax F | −9,107 | 36.47 | 93,907 | Form 4 |
| 2026-02-13 | D'Antilio DerekEVP, CFO & Treasurer | Shares withheld for tax F | −17,808 | 42.38 | 226,771 | Form 4 |
| 2026-02-13 | Briansky SharonSVP, GC and Secretary | Shares withheld for tax F | −8,991 | 42.38 | 112,272 | Form 4 |
| 2026-02-02 | Kent IanSVP, Global Operations | Grant or award A | +9,183 | – | 21,887 | Form 4 |
| 2025-11-11 | Coleman TroySVP, General Manager, Products | Grant or award A | +73,530 | – | 73,530 | Form 4 |
| 2025-08-07 | Suzuki YoshihiroDirector | Grant or award A | +5,932 | – | 213,560 | Form 4 |
| 2025-08-07 | Puma Mary GDirector | Grant or award A | +5,932 | – | 17,483 | Form 4 |
| 2025-08-07 | Martin Joseph RDirector | Grant or award A | +5,932 | – | 35,179 | Form 4 |
| 2025-08-07 | Palepu Krishna G.Director | Grant or award A | +5,932 | – | 9,961 | Form 4 |
| 2025-08-07 | Lynch Susan DDirector | Grant or award A | +5,932 | – | 29,516 | Form 4 |
| 2025-08-07 | Lury Richard R.Director | Grant or award A | +5,932 | – | 25,857 | Form 4 |
| 2025-08-07 | Raubacher JennieDirector | Grant or award A | +5,932 | – | 14,976 | Form 4 |
| 2025-05-16 | D'Antilio DerekEVP, CFO & Treasurer | Shares withheld for tax F | −29,911 | 27.51 | 244,579 | Form 4 |
| 2025-05-16 | Briansky SharonSVP, GC and Secretary | Shares withheld for tax F | −18,712 | 27.51 | 149,136 | Form 4 |
| 2025-05-16 | Hagen ErinSVP, CHRO | Shares withheld for tax F | −4,899 | 27.51 | 39,731 | Form 4 |
| 2025-05-16 | Webster Roald GrahamVP, Chief Accounting Officer | Shares withheld for tax F | −4,948 | 27.51 | 25,566 | Form 4 |
| 2025-05-16 | Doogue MichaelDirector, President and CEO | Shares withheld for tax F | −21,730 | 27.51 | 215,549 | Form 4 |
| 2025-05-15 | D'Antilio DerekEVP, CFO & Treasurer | Grant or award A | +65,098 | – | 274,490 | Form 4 |
| 2025-05-15 | Briansky SharonSVP, GC and Secretary | Grant or award A | +35,053 | – | 167,848 | Form 4 |
| 2025-05-15 | Hagen ErinSVP, CHRO | Grant or award A | +18,153 | – | 44,630 | Form 4 |
| 2025-05-15 | Madormo RichardSVP, Worldwide Sales | Grant or award A | +37,557 | – | 66,809 | Form 4 |
| 2025-05-15 | Webster Roald GrahamVP, Chief Accounting Officer | Grant or award A | +9,765 | – | 30,514 | Form 4 |
| 2025-05-15 | Doogue MichaelDirector, President and CEO | Grant or award A | +150,226 | – | 237,279 | Form 4 |
| 2025-05-13 | Briansky SharonSVP, GC and Secretary | Grant or award A | +14,656 | – | 132,795 | Form 4 |
| 2025-05-13 | Hagen ErinSVP, CHRO | Grant or award A | +1,222 | – | 26,477 | Form 4 |
| 2025-05-13 | Webster Roald GrahamVP, Chief Accounting Officer | Grant or award A | +1,002 | – | 20,749 | Form 4 |
| 2025-05-13 | D'Antilio DerekEVP, CFO & Treasurer | Grant or award A | +21,295 | – | 209,392 | Form 4 |
| 2025-05-13 | Doogue MichaelDirector, President and CEO | Grant or award A | +18,489 | – | 87,053 | Form 4 |
| 2025-02-27 | Briansky SharonSVP, GC and Secretary | Grant or award A | +18,834 | – | 118,139 | Form 4 |
| 2025-02-27 | Hagen ErinSVP, CHRO | Grant or award A | +4,594 | – | 25,255 | Form 4 |
| 2025-02-27 | D'Antilio DerekEVP, CFO & Treasurer | Grant or award A | +20,671 | – | 188,097 | Form 4 |
| 2025-01-31 | Palepu Krishna G.Director | Grant or award A | +4,029 | – | 4,029 | Form 4 |
| 2024-11-18 | Glover Max R.SVP of Worldwide Sales | Shares withheld for tax F | −2,644 | 19.24 | 266,339 | Form 4 |
| 2024-11-18 | Doogue MichaelSVP, CTO | Shares withheld for tax F | −2,319 | 19.24 | 62,404 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.