Erin E. Hagen - 10 Aug 2026 Form 4 Insider Report for ALLEGRO MICROSYSTEMS, INC. (ALGM)

Reporting relationship: SVP, CHRO
Issuer ticker: ALGM
Reported as of: 10 Aug 2026
Net transaction value: -$101,431
SEC form: 4
Accepted by SEC: 12 Aug 2026, 16:16:02 UTC
Prior SEC filing: 19 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Raymond Myer, Attorney-in-Fact for Erin E. Hagen

Key filing fact

Erin E. Hagen filed Form 4 for ALLEGRO MICROSYSTEMS, INC. (ALGM) on 12 Aug 2026.

Key facts

This page summarizes Erin E. Hagen's Form 4 filing for ALLEGRO MICROSYSTEMS, INC. (ALGM).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 12 Aug 2026, 16:16.

Change

Previous filing in this sequence was filed on 19 May 2026.
Current net transaction value: -$101,431.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002022960 Primary reporting owner

Hagen Erin

Relationship: SVP, CHRO
Address: 955 PERIMETER ROAD, MANCHESTER
Signature: /s/ Raymond Myer, Attorney-in-Fact for Erin E. Hagen
Signature date: 12 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALGM transaction

Common Stock

Sale

Transaction value: $101,431
Shares: -2,285
Change %: -6.9%
Price: $44.39
Shares after: 31,052
Date: 10 Aug 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 11, 2026. Details regarding the Reporting Person's trading plan were reported in Part II, Item 5 of the Issuer's Quarterly Report on Form 10-Q for the period ending June 26, 2026, filed with the SEC on July 31, 2026.