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ALLEGRO MICROSYSTEMS, INC.

For the period ended Jun 26, 2026. Filed Jul 31, 2026.

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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.

Jun 26, 2026 · Filed Jul 31, 2026

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

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Other Information

Item 5. Other Information

On May 11, 2026, Erin Hagen, the Company’s Senior Vice President, Chief Human Resources Officer, adopted a trading arrangement for the sale of shares of the Company’s common stock that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act (a “Rule 10b5-1 Trading Plan”). Ms. Hagen's Rule 10b5-1 Trading Plan, which terminates at the close of trading on October 25, 2027, for a total duration of 532 days, provides for the potential sale of up to 6,250 shares of the Company’s common stock pursuant to the terms of the plan. The actual number of shares sold under the Rule 10b5-1 Trading Plan will depend on the sale price of the shares and the resulting amount of gross proceeds.

On May 20, 2026, Jennie Raubacher, a member of the Company’s Board of Directors, adopted a Rule 10b5-1 Trading Plan. Ms. Raubacher’s Rule 10b5-1 Trading Plan, which terminates at the close of trading on March 31, 2027, for a total duration of 315 days, provides for the sale of up to 4,000 shares of the Company’s common stock pursuant to the terms of the plan.

On May 26, 2026, Sharon Briansky, the Company’s Senior Vice President, General Counsel and Corporate Secretary, adopted a Rule 10b5-1 Trading Plan. The Rule 10b5-1 Trading Plan, which terminates at the close of trading on May 3, 2027, for a total duration of 342 days, provides for the potential sale of up to 19,895 shares of the Company’s common stock pursuant to the terms of the plan.

On June 11, 2026, the Michael Doogue Revocable Trust of 2015, which Michael Doogue, the Company's Chief Executive Officer, serves as trustee and as the trust’s indirect beneficial owner, adopted a Rule 10b5-1 Trading Plan. The Rule 10b5-1 Trading Plan, which terminates at the close of trading on June 11, 2028, for a total duration of 731 days, provides for the sale of up to 75,000 shares of the Company’s common stock pursuant to the terms of the plan.

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