Ticker · held by 3 filers

ALGM

ALLEGRO MICROSYSTEMS INC

All tracked filers currently holding ALGM, ranked by position size. Each row links through to the filer's full portfolio.

Total value held

$270.5M

Total shares

9,786,478

Filers holding

3 · 5 positions

Caveat

long only · 13F-eligible managers only

Filers holding ALGM

sorted by position size · click any filer to see their full portfolio

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM 6,634,658 $187.4M 0.00%

2 Citadel Advisors · Ken Griffin COM 2,560,520 $67.5M 0.01%

3 Renaissance Technologies · Jim Simons (founder) COM 436,200 $11.5M 0.02%

4 Citadel Advisors · Ken Griffin CALLCOM 142,900 $3.8M 0.00%

5 Citadel Advisors · Ken Griffin PUTCOM 12,200 $321.8K 0.00%

What this is

This page reverses the usual 13F view: instead of "what does Buffett hold," it answers "who holds NVDA?" Across the dozen tracked filers, all current 13F-disclosed holders of ALGM are listed, with the position size and what fraction of each filer's overall portfolio it represents.

Caveats: only the filers tracked here are included (~12 names) — not the whole 13F universe (~6,000 filers). Position values are at the most recent quarter-end, not current market price. Only long positions are visible; shorts and synthetics aren't.

v0.2 · 2026 · data via SEC EDGAR · CUSIP→ticker via OpenFIGI