Ticker · held by 3 filers

MRCY

MERCURY SYS INC

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

Total value held

$251.6M

Total shares

8,998,374

Filers holding

3 · 5 positions

Caveat

long only · 13F-eligible managers only

Filers holding MRCY

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

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM 8,808,929 $237.8M 0.01%

2 Citadel Advisors · Ken Griffin COM 104,376 $7.6M 0.00%

3 Citadel Advisors · Ken Griffin CALLCOM 45,000 $3.3M 0.00%

4 Citadel Advisors · Ken Griffin PUTCOM 24,600 $1.8M 0.00%

5 Bridgewater Associates · Ray Dalio (founder) COM 15,469 $1.1M 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 MRCY 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