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ALLEGRO MICROSYSTEMS INC (ALGM)

Institutional ownership, SEC filings and insider activity

Sector: Technology · SEC CIK 0000866291 · EDGAR filings · Updated 2026-07-27

ALLEGRO MICROSYSTEMS INC (ALGM) has reported institutional ownership of 74.3%, with 317 institutional managers holding positions valued at $4.32B per the latest 13F reporting period. SEC filings include an active material impairment disclosure (8-K Item 2.06).

Filings this week (1)

• 2026-07-27 — SCHEDULE 13G/A filed

Every filing links to the official SEC document. Real-time filing alerts for this company are available inside the app.

Latest updates

• 2026-07-16 — SCHEDULE 13G filed
• 2026-06-24 — ARS filed
• 2026-06-24 — DEFA14A filed
• 2026-06-24 — Proxy statement (DEF 14A) filed
• 2026-06-18 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, ALLEGRO MICROSYSTEMS INC has 317 institutional holders and institutional ownership of 74.3%.

Insider activity

Insiders reported 40 transactions (0 buys, 9 sells) across 15 reporting insiders, with a net reported value of −$2.59M.

Data flags from SEC filings

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