Updated Jul 16, 2026 · Last SEC filing 2026-06-18
ALLEGRO MICROSYSTEMS, INC. (ALGM) has filed 24 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-18. 3 Form 8-K material event filings were reported by ALGM in the last 90 days. 6 Form 144 notices of proposed sale were filed for ALGM stock. InsiderAlpha tracks every ALGM SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0000866291 |
|---|
| Form 4 filings (90d) | 24 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 6 |
| Latest Form 4 filing | 2026-06-18 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| WHITE BRIAN C | Insider | A — Grant or award | 594 | $0.00 | — | SEC | |
| Madormo Richard | SVP, Worldwide Sales | S — Open-market sale | 5.0K | $52.72 | $264K | SEC | |
| Coleman Troy | SVP, General Manager, Products | S — Open-market sale | 4.5K | $45.72 | $206K | SEC | |
| Webster Roald Graham | VP, Chief Accounting Officer | S — Open-market sale | 5.2K | $44.88 | $234K | SEC | |
| Kent Ian | SVP, Global Operations | S — Open-market sale | 2.6K | $41.56 | $110K | SEC | |
| Coleman Troy | SVP, General Manager, Products | F — Tax withholding / forfeiture | 9.7K | $43.10 | $417K | SEC | |
| Briansky Sharon | SVP, GC and Secretary | F — Tax withholding / forfeiture | 13.9K | $43.10 | $601K | SEC | |
| D'Antilio Derek | EVP, CFO & Treasurer | F — Tax withholding / forfeiture | 37.8K | $43.10 | $1.63M | SEC | |
| Webster Roald Graham | VP, Chief Accounting Officer | F — Tax withholding / forfeiture | 4.3K | $43.10 | $184K | SEC | |
| Madormo Richard | SVP, Worldwide Sales | F — Tax withholding / forfeiture | 5.4K | $43.10 | $234K | SEC | |
| Kent Ian | SVP, Global Operations | F — Tax withholding / forfeiture | 2.3K | $43.10 | $101K | SEC | |
| Hagen Erin | SVP, CHRO | F — Tax withholding / forfeiture | 5.8K | $43.10 | $251K | SEC | |
| Doogue Michael | President and CEO | F — Tax withholding / forfeiture | 60.5K | $43.10 | $2.61M | SEC | |
| Lynch Susan D | Insider | S — Open-market sale | 16.7K | $45.46 | $760K | SEC | |
| Kent Ian | SVP, Global Operations | A — Grant or award | 8.5K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for ALLEGRO MICROSYSTEMS, INC. (ALGM). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Doogue Michael | 4 | $4.03M |
| Briansky Sharon | 4 | $1.03M |
| Webster Roald Graham | 4 | $419K |
| Coleman Troy | 3 | $623K |
| D'Antilio Derek | 3 | $1.63M |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ALGM insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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