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RENAISSANCE TECHNOLOGIES LLC

Position in UPB — Upstream Bio, Inc.

CIK 1037389 NEW YORK, NY

Position in UPB

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$908,596
+$349,696 QoQ
Shares Held
131,300
+111.4% QoQ
Ownership
0.240%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#49
of 148 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in UPB Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

RENAISSANCE TECHNOLOGIES LLC holds $3,950,489,724 across 311 Biotechnology names. UPB ranks #180 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in UPB

Export CSV
3 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $908,596 131,300
2026-03-31 $558,900 62,100
2025-12-31 $445,260 16,400