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Ticker · held by 3 filers

RPID

RAPID MICRO BIOSYSTEMS INC

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

Total value held
$1.1M
Total shares
890,685
Filers holding
3
Caveat
long only · 13F-eligible managers only
Filers holding RPID
# Filer Class Shares Value (USD) % of port
1 BlackRock · Larry Fink CLASS A COM 648,519 $428.0K 0.00%
2 Citadel Advisors · Ken Griffin CLASS A COM 126,539 $367.0K 0.00%
3 Renaissance Technologies · Jim Simons (founder) CLASS A COM 115,627 $335.3K 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 RPID 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