Ticker · held by 3 filers

AMPX

AMPRIUS TECHNOLOGIES INC

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

Total value held

$15.2M

Total shares

2,449,004

Filers holding

3 · 5 positions

Caveat

long only · 13F-eligible managers only

Filers holding AMPX

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

# Filer Class Shares Value (USD) % of port

1 Citadel Advisors · Ken Griffin CALLCOMMON STOCK 746,300 $5.9M 0.00%

2 Citadel Advisors · Ken Griffin PUTCOMMON STOCK 505,300 $4.0M 0.00%

3 Citadel Advisors · Ken Griffin COMMON STOCK 454,854 $3.6M 0.00%

4 Renaissance Technologies · Jim Simons (founder) COMMON STOCK 112,825 $890.2K 0.00%

5 BlackRock · Larry Fink COMMON STOCK 629,725 $799.8K 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 AMPX 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