Allegro MicroSystems, Inc. (ALGM) Institutional Ownership & Insider Trading

373 institutions reported holding Allegro MicroSystems, Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 13 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

ALGMAllegro MicroSystems, Inc.Follow ALGM — free

Semiconductors · Technology

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Market cap: 5.9B
P/E TTM: —
Dividend yield: —
52-week: —
Next earnings: 29 Oct, in 5 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

373 institutions held 78.9% of the shares. Across filers that reported both quarters, shares held changed +6.7%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	373	147	+6.7%	106	90	101	39
Mar 26	317	138	+2.5%	117	57	81	30
Dec 25	291	137	-7.0%	74	44	110	37
Sep 25	285	144	-1.3%	69	53	100	37
Jun 25	270	146	-6.9%	82	44	99	58
Mar 25	286	156	+10.9%	98	57	72	28
Dec 24	253	142	-10.6%	75	30	103	36
Sep 24	243	141	+26.4%	109	37	64	53

Allegro MicroSystems, Inc. — questions

Who owns Allegro MicroSystems, Inc. stock?: 373 institutions reported Allegro MicroSystems, Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: FMR LLC (13.7%), BlackRock, Inc. (7.5%), Invesco Ltd. (7.3%).
Are Allegro MicroSystems, Inc. insiders buying or selling?: 13 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Allegro MicroSystems, Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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