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AQR CAPITAL MANAGEMENT LLC

Position in UPB — Upstream Bio, Inc.

CIK 1167557 Greenwich, CT

Position in UPB

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$649,539
-$178,614 QoQ
Shares Held
72,171
+136.6% QoQ
Ownership
0.133%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2025
5 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 Mar 31, 2026

AQR CAPITAL MANAGEMENT LLC holds $4,607,351,941 across 214 Biotechnology names. UPB ranks #149 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in UPB

Export CSV
5 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $649,539 72,171
2025-12-31 $828,153 30,503
2025-09-30 $563,433 29,954
2025-06-30 $326,674 29,752
2025-03-31 $115,188 18,822