LYTIR

Company · ALGM

Allegro MicroSystems, Inc.

Name as listed on its exchange; filed with the SEC as ALLEGRO MICROSYSTEMS, INC.

Nasdaq's symbol directory lists ALGM on Nasdaq as “Allegro MicroSystems, Inc. - Common Stock”.

In the 12 months to Nov 8, 2026: insiders sold on 2 occasions ($147K); 5 filings by holders of 5% or more; 1 congressional trade disclosure; 1 company report (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Hagen Erin, SVP, CHRO sold on 1 day all under a 10b5-1 plan latest Aug 10, 2026 sold $101K
  2. Raubacher Jennie sold on 1 day all under a 10b5-1 plan latest Aug 17, 2026 sold $45K
Every trade (2)
  1. SELLRaubacher Jennie sold Aug 17, 2026 1,000 shares 10b5-1 plan (scheduled) filing $45K
  2. SELLHagen Erin, SVP, CHRO sold Aug 10, 2026 2,285 shares 10b5-1 plan (scheduled) filing $101K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. JPMORGAN CHASE & CO. filed Nov 5, 2026 Schedule 13G/A passive 8,022,860 shares filing 4.3%
  2. FMR LLC filed Oct 7, 2026 Schedule 13G/A passive 9,913,111 shares filing 5.3%
  3. Invesco Ltd. filed Aug 13, 2026 Schedule 13G passive filing 7.3%
  4. FMR LLC filed Aug 6, 2026 Schedule 13G/A passive 25,581,021 shares filing 13.7%
  5. JPMORGAN CHASE & CO filed Jul 16, 2026 Schedule 13G passive 12,729,473 shares filing 6.8%

Congress · STOCK Act

The Althing

Periodic transaction reports. Amounts are the ranges members report; the trade date is when it happened, the report can come up to 45 days later.

  1. Gilbert Cisneros (D-CA31): Purchase Sep 29, 2026 reported Oct 12, 2026 one of 57 trades the member reported that day House Stocks (including ADRs) $1,001 - $15,000

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Oct 29, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.