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ALLEGRO MICROSYSTEMS, INC.

For the period ended Sep 26, 2025. Filed Oct 31, 2025.

View on SEC.gov

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 26, 2025 · Filed Oct 31, 2025

ALGM$28.17+5.1%Stored close · as of Nov 6, 2026

What changed in Risk Factors?

Read the current filing

Previous report: 10-Q

Period ended 2025-06-27; filed 2025-08-01.

0000950170-25-101117

Item 1A. Risk FactorsUnregistered Sales of Equity Securities and Use of ProceedsOther Information

Current report: 10-Q

Period ended 2025-09-26; filed 2025-10-31.

0001193125-25-259807

Item 1A. Risk FactorsUnregistered Sales of Equity Securities and Use of ProceedsOther Information

The baseline is this issuer’s latest earlier reporting period of the same form that was filed before the current report. A previous 10-Q is a different quarter, not a year-over-year comparison. Amendments are excluded.

Compared 6 previous paragraphs and 8 current paragraphs.

5 unchanged; 0 reworded; 3 added; 1 removed; 0 previous and 0 current paragraphs rearranged.

Tables are not compared: 0 previous and 0 current tables excluded. Dates, whitespace, punctuation and numbering changes are ignored; changes to financial figures remain significant.

A changed paragraph is not evidence that risk increased or decreased. An unchanged paragraph does not establish that risk stayed the same.

Added paragraphs (3)

Current report

On August 4, 2025, Sharon Briansky, the Company’s Senior Vice President, General Counsel and Corporate Secretary, adopted a trading arrangement intended to satisfy the affirmative defense of Rule 10b5-1(c) (a “Rule 10b5-1 Trading Plan”). The Rule 10b5-1 Trading Plan provides for the potential sale of up to 64,956 shares of the Company’s common stock over a maximum duration of 364 days and is scheduled toterminate on August 3, 2026, or upon the earlier completion of all authorized transactions under the

Current report

Rule 10b5-1 Trading Plan.

Current report

The actual number of shares sold under the Rule 10b5-1 Trading Plan will depend on the number of shares delivered at the time that certain of Ms. Briansky’s restricted stock units vest during the term of the plan and the number of shares withheld by the Company to satisfy its income tax withholding obligation.
Removed paragraphs (1)

Previous report

During the three-month period ended June 27, 2025, no director or officer of the Company adopted orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” as each term is defined in Item 408 of Regulations S-K.