Derek D'Antilio

Derek D'Antilio: EVP, CFO & Treasurer at Allegro MicroSystems. What Derek D'Antilio holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.

Allegro MicroSystems (ALGM)

Derek D'Antilio holds 238,813 Allegro MicroSystems shares (0.13% of the company), worth about $8.2M at the last price, according to the Form 4 of May 16, 2026.

Shares held: 238,813 (0.13%), $8.2M — Held in their own name.

Declarations

Allegro MicroSystems (ALGM) — Form 4 of May 16, 2026 (EVP, CFO & Treasurer): shares withheld for tax of 37,840 at $43.10; 238,813 shares after 0001193125-26-231164
Allegro MicroSystems (ALGM) — Form 4 of May 13, 2026 (EVP, CFO & Treasurer): grant or award of 29,439; grant or award of 30,438; 276,653 shares after 0001193125-26-226843
Allegro MicroSystems (ALGM) — Form 4 of Feb 27, 2026 (EVP, CFO & Treasurer): shares withheld for tax of 9,995 at $36.47; 216,776 shares after 0001193125-26-088230
Allegro MicroSystems (ALGM) — Form 4 of Feb 13, 2026 (EVP, CFO & Treasurer): shares withheld for tax of 17,808 at $42.38; 226,771 shares after 0001193125-26-057086
Allegro MicroSystems (ALGM) — Form 4 of May 16, 2025 (EVP, CFO & Treasurer): grant or award of 65,098; shares withheld for tax of 29,911 at $27.51; 244,579 shares after 0000950170-25-074371
Allegro MicroSystems (ALGM) — Form 4 of May 13, 2025 (EVP, CFO & Treasurer): grant or award of 21,295; 209,392 shares after 0000950170-25-071492
Allegro MicroSystems (ALGM) — Form 4 of Feb 27, 2025 (EVP, CFO & Treasurer): grant or award of 20,671; 188,097 shares after 0000950170-25-030872

Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.

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