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FMR LLC

Position in UPB — Upstream Bio, Inc.

CIK 315066 BOSTON, MA

Position in UPB

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$56,487,246
-$16,426,821 QoQ
Shares Held
8,162,897
+0.8% QoQ
Ownership
14.9%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#1
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

FMR LLC holds $61,908,415,112 across 370 Biotechnology names. UPB ranks #117 (0.1% 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 $56,487,246 8,162,897
2026-03-31 $72,914,067 8,101,563
2025-12-31 $204,119,182 7,518,202
2025-09-30 $152,105,427 8,086,413
2025-06-30 $87,146,940 7,936,880
2025-03-31 $44,405,856 7,255,859
2024-12-31 $117,976,514 7,176,187