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ALLIANCEBERNSTEIN L.P.

Position in UPB — Upstream Bio, Inc.

CIK 1109448 NASHVILLE, TN

Position in UPB

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$357,625
+$78,535 QoQ
Shares Held
51,680
+66.7% QoQ
Ownership
0.094%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#62
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

ALLIANCEBERNSTEIN L.P. holds $5,185,395,108 across 257 Biotechnology names. UPB ranks #186 (0.0% 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 $357,625 51,680
2026-03-31 $279,090 31,010
2025-12-31 $841,921 31,010
2025-09-30 $373,378 19,850
2025-06-30 $269,668 24,560
2025-03-31 $6,678,058 1,091,186
2024-12-31 $18,270,380 1,111,337