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Ticker · held by 3 filers

APT

ALPHA PRO TECH LTD

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

Total value held
$4.9M
Total shares
1,029,866
Filers holding
3 · 5 positions
Caveat
long only · 13F-eligible managers only
Filers holding APT
# Filer Class Shares Value (USD) % of port
1 Renaissance Technologies · Jim Simons (founder) COM 522,972 $2.3M 0.00%
2 BlackRock · Larry Fink COM 272,043 $1.5M 0.00%
3 Citadel Advisors · Ken Griffin CALLCOM 120,300 $534.1K 0.00%
4 Citadel Advisors · Ken Griffin PUTCOM 93,200 $413.8K 0.00%
5 Citadel Advisors · Ken Griffin COM 21,351 $94.8K 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 APT 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