Ticker · held by 2 filers

PSIX

POWER SOLUTIONS INTL INC

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

Total value held

$13.4M

Total shares

234,031

Filers holding

2 · 4 positions

Caveat

long only · 13F-eligible managers only

Filers holding PSIX

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

# Filer Class Shares Value (USD) % of port

1 Renaissance Technologies · Jim Simons (founder) COM NEW 107,898 $6.2M 0.01%

2 Citadel Advisors · Ken Griffin PUTCOM NEW 56,000 $3.2M 0.00%

3 Citadel Advisors · Ken Griffin CALLCOM NEW 53,800 $3.1M 0.00%

4 Citadel Advisors · Ken Griffin COM NEW 16,333 $933.3K 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 PSIX 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