🕵️ Allegro Microsystems, Inc. ($ALGM)

SEC insider & ownership activity, last 12 months · CIK 866291 · every row links its SEC filing

Over the last 12 months insiders sold $5.7M with no open-market buying against it. Briansky Sharon sold $2.0M (Dec–May). Capital Research Global Investors trimmed 8.6% → 7.1%. No red-flag 8-Ks in the window.

Aug 2025: net -$651K Sep 2025: net +$0 Oct 2025: net +$0 Nov 2025: net +$0 Dec 2025: net -$836K Jan 2026: net +$0 Mar 2026: net -$431K Mar 2026: net -$431K Apr 2026: net +$0 May 2026: net -$3.2M Jun 2026: net -$264K Jul 2026: net +$0
Monthly net open-market insider flow, last 12 months (up = net buying)

Insider flow

0 buyers, $0 (0 lots) · 9 sellers, $5.7M (14 lots)

InsiderBuysBoughtSellsSoldLast
Briansky Sharon0 4$2.0MMay 11, 2026
Doogue Michael0 1$1.4MMay 11, 2026
Susan D. Lynch0 1$760KMay 14, 2026
Webster Roald Graham0 2$505KMay 21, 2026
Madormo Richard0 1$264KJun 3, 2026
Hagen Erin0 2$248KMar 2, 2026
Richard R. Lury0 1$223KAug 12, 2025
Coleman Troy0 1$206KMay 22, 2026
Kent Ian0 1$110KMay 18, 2026

5%+ holders

HolderStakeClassScheduleEvent
FMR LLC 14.8% 13GMay 6, 2026 filing ↗
Abigail P. Johnson 14.8% 13GMay 6, 2026 filing ↗
Capital Research Global Investors 7.1% 13GFeb 12, 2026 filing ↗
Blackrock, Inc. 6.9% 13GJul 27, 2026 filing ↗
JPMorgan Chase & Co 6.8% 13GJul 16, 2026 filing ↗

Planned insider sales (Form 144)

SellerPlannedApprox. sale date
Madormo Richard$264KJun 3, 2026 filing ↗
Coleman Troy$206KMay 22, 2026 filing ↗
Kent Ian$110KMay 18, 2026 filing ↗
Susan D. Lynch$760KMay 14, 2026 filing ↗
Doogue Michael$1.4MMay 11, 2026 filing ↗
Briansky Sharon$425KMay 11, 2026 filing ↗
Briansky Sharon$340KMar 2, 2026 filing ↗
Hagen Erin$91KMar 2, 2026 filing ↗
Briansky Sharon$385KFeb 17, 2026 filing ↗
Briansky Sharon$836KDec 10, 2025 filing ↗
Richard R. Lury$223KAug 12, 2025 filing ↗
Hagen Erin$157KAug 4, 2025 filing ↗

Material events (8-K)

ItemEvent date
Officer/director changes (5.02)Jun 17, 2026 filing ↗
Reg FD disclosure (7.01)Jun 17, 2026 filing ↗
Financial Statements and Exhibits (9.01)Jun 17, 2026 filing ↗
Officer/director changes (5.02)May 11, 2026 filing ↗
Reg FD disclosure (7.01)May 11, 2026 filing ↗
Financial Statements and Exhibits (9.01)May 11, 2026 filing ↗
Earnings (2.02)May 7, 2026 filing ↗
Financial Statements and Exhibits (9.01)May 7, 2026 filing ↗
Earnings (2.02)Jan 29, 2026 filing ↗
Financial Statements and Exhibits (9.01)Jan 29, 2026 filing ↗
Material agreement (1.01)Jan 21, 2026 filing ↗
New financial obligation (2.03)Jan 21, 2026 filing ↗
Financial Statements and Exhibits (9.01)Jan 21, 2026 filing ↗
Reg FD disclosure (7.01)Jan 15, 2026 filing ↗
Financial Statements and Exhibits (9.01)Jan 15, 2026 filing ↗
Earnings (2.02)Oct 30, 2025 filing ↗
Financial Statements and Exhibits (9.01)Oct 30, 2025 filing ↗
Shareholder vote (5.07)Aug 7, 2025 filing ↗
Financial Statements and Exhibits (9.01)Aug 7, 2025 filing ↗
Earnings (2.02)Jul 31, 2025 filing ↗
Financial Statements and Exhibits (9.01)Jul 31, 2025 filing ↗