Allegro Microsystems, Inc.

ALGM·NASDAQ·$50.76Share Price as of 11/2·$9BMarket Cap as of 11/2

Financials

10-QQ2 ended 09/25/2610/30/26 10-QQ1 ended 06/26/2607/31/26 10-KFY 202605/21/26 10-QQ3 ended 12/26/2501/30/26 10-QQ2 ended 09/26/2510/31/25

Disclosures

8-KCurrent report10/29/26 8-KCurrent report08/07/26 8-KCurrent report07/30/26 8-KCurrent report06/18/26 8-KCurrent report05/13/26

Prospectuses and Registrations

424B5Prospectus supplement07/25/24 424B5Prospectus supplement07/23/24 S-3ASRAutomatic shelf registration07/23/24 424B7Prospectus11/02/21 FWPFree writing prospectus11/01/21

Proxies

DEF 14ADefinitive proxy06/24/26 DEFA14AAdditional proxy materials06/24/26 DEF 14ADefinitive proxy06/25/25 DEFA14AAdditional proxy materials06/25/25 DEF 14ADefinitive proxy06/26/24

Ownership

SC 13G/ABeneficial ownership (amended)10/07/26 Form 4Insider transaction10/01/26 Form 4Insider transaction08/18/26 144Proposed sale of securities08/17/26 Form 4Insider transaction08/12/26

Other

ARSAnnual report to shareholders06/24/26 SDConflict Minerals disclosure05/29/26 ARSAnnual report to shareholders06/25/25 SDConflict Minerals disclosure05/22/25 ARSAnnual report to shareholders06/26/24