← The Code Deck
/ deck / lab/portfolio / ticker / AMPG
Ticker · held by 3 filers

AMPG

AMPLITECH GROUP INC

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

Total value held
$1.4M
Total shares
483,331
Filers holding
3
Caveat
long only · 13F-eligible managers only
Filers holding AMPG
# Filer Class Shares Value (USD) % of port
1 Citadel Advisors · Ken Griffin CALLCOM NEW 318,000 $950.8K 0.00%
2 Renaissance Technologies · Jim Simons (founder) COM NEW 158,200 $473.0K 0.00%
3 BlackRock · Larry Fink COM NEW 7,131 $7.5K 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 AMPG 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