UPSTREAM BIO INC

Ticker: UPB CUSIP: 91678A107 Class: Common Stock

Alyeska Investment Group, L.P.'s Holding History (CIK: 0001453072)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025
Shares 298,329 Value ($000) $8,100 Avg Close $24.89 Range $18.05 - $33.00
Q2 2025
Shares 85,000 Value ($000) $933 Avg Close $9.24 Range $5.14 - $12.10
Q1 2025
Shares 85,000 Value ($000) $520 Avg Close $9.55 Range $6.12 - $18.95
Q4 2024
Shares 85,000 Value ($000) $1,397 Avg Close $22.33 Range $14.97 - $29.46