Robert J. Willett - 30 Sep 2026 Form 4 Insider Report for ALLEGRO MICROSYSTEMS, INC. (ALGM)

Reporting relationship: Director
Issuer ticker: ALGM
Reported as of: 30 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 01 Oct 2026, 16:16:02 UTC
Prior SEC filing: 07 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Raymond Myer, Attorney-in-Fact for Robert J. Willett

Key filing fact

Robert J. Willett filed Form 4 for ALLEGRO MICROSYSTEMS, INC. (ALGM) on 01 Oct 2026.

Key facts

This page summarizes Robert J. Willett's Form 4 filing for ALLEGRO MICROSYSTEMS, INC. (ALGM).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 01 Oct 2026, 16:16.

Change

Previous filing in this sequence was filed on 07 Aug 2026.
Current net transaction value: $0.

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 0001438093 Primary reporting owner

Willett Robert

Relationship: Director
Address: 955 PERIMETER ROAD, MANCHESTER
Signature: /s/ Raymond Myer, Attorney-in-Fact for Robert J. Willett
Signature date: 01 Oct 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ALGM transaction Derivative

Deferred Stock Units

Award

Transaction value
Shares: +619
Change %: +15%
Price: $0.000000^*
Shares after: 4,870
Date: 30 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 619
Exercise price
Footnotes: F1, F2, F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Each deferred stock unit ("DSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Footnote F2

As part of the Issuer's non-employee director compensation program, the reporting person elected to receive his quarterly cash board retainer fee in the form of DSUs pursuant to a prior election under the Issuer's Deferred Compensation Plan for Non-Employee Directors. The number of DSUs was calculated by dividing the quarterly cash retainer amount deferred by $36.35, the Fair Market Value of a share of the Issuer's Common Stock on the effective date of the deferral.

Footnote F3

The DSUs are fully vested when granted and will be settled in a lump sum in whole shares of the Issuer's Common Stock, with cash paid in lieu of any fractional DSU, following the reporting person's separation from service, disability, or death.