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SAMSARA BIOCAPITAL, LLC

Position in UPB — Upstream Bio, Inc.

CIK 1744967 PALO ALTO, CA

Position in UPB

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$2,447,721
-$4,176,702 QoQ
Shares Held
353,717
-51.9% QoQ
Ownership
0.646%
of shares outstanding
% of Portfolio
0.20%
of 13F equity value
Holder Rank
#30
of 148 holders
Holding Since
Dec 2024
7 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

SAMSARA BIOCAPITAL, LLC holds $1,139,869,255 across 22 Biotechnology names. UPB ranks #21 (0.2% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in UPB

Export CSV
7 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $2,447,721 353,717
2026-03-31 $6,624,423 736,047
2025-12-31 $19,983,676 736,047
2025-09-30 $18,098,116 962,154
2025-06-30 $15,846,676 1,443,231
2025-03-31 $12,650,933 2,067,146
2024-12-31 $36,449,880 2,217,146