Allegro MicroSystems (ALGM)Segall Bryant & Hamill, LLC reduced its stake -713K shares

332K

Shares reported · -713K vs prior quarter

0.27%

Disclosed portfolio weight

$23.1M

Reported value

Holdings as of

Jun 30, 2026

Filed

Aug 12, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Jun 17, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On June 17, 2026, at the recommendation of the Nominating and Governance Committee (“NGC”) of the Board of Directors (the “Board”) of Allegro MicroSystems, Inc. (the “Company”) and in accordance with the Second Amended and Restated Stockholders Agreement, dated as of July 23, 2024, by and among the Company and Sanken Electric Co., Ltd. (the “Stockholders Agreement”), the Board took the following actions, each of…”
2. Jul 30, 2026Company filing · Form 8-K · ResultsReported its results
3. Aug 10, 2026InsiderOfficer sold ~$101K of ALGM shares in the open market

What came next

1. Aug 17, 2026InsiderDirector sold ~$45K of ALGM shares in the open market
2. Oct 7, 20265% stakeFMR LLC reported a passive stake (13G) of 5.3%

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Allegro MicroSystems

For Allegro MicroSystems, OQRO holds 2 insider filings (SEC Form 4 or Form 144) and 4 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its ALGM page.

How this filing works

• SEC Form 13F

Other disclosures at Allegro MicroSystems

• SEC Form 4Aug 18, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 4Aug 12, 2026
• SEC Form 4Jun 4, 2026

Everything OQRO holds on this company is on its ALGM page.