AAP
UPB

Arax Advisory Partners’s Upstream Bio Inc UPB Stock Holding History

Arax Advisory Partners’s Portfolio UPB Stock Details UPB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$12.3K Buy
1,771
+1,694
+2,200% +$14.2K ﹤0.01% 4238
2026
Q1 		$693 Buy
77
+75
+3,750% +$1.35K ﹤0.01% 3364
2025
Q4 		$54 Sell
2
-147
-99% -$3.66K ﹤0.01% 3907
2025
Q3 		$2.8K Buy
+149
New +$2.31K ﹤0.01% 3027

Other funds holding UPB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
O
OrbiMed New York $5.4B AUM 163.13% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
DC
Decheng Capital Menlo Park, California $732M AUM 275.56% 1-Year Est. Return
ES
Enavate Sciences Menlo Park, California $345M AUM 134.64% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Arax Advisory Partners's UPB Position: Q2 2026 in Review

Arax Advisory Partners increased its Upstream Bio Inc (UPB) stake by 2,200% in Q2 2026, buying an estimated $14.2K and bringing the position to 1,771 shares worth $12.3K. The position accounts for ﹤0.01% of the portfolio, ranked #4238.

Arax Advisory Partners first reported a position in UPB in Q3 2025 and has held it in 4 quarters since. 148 funds tracked by Wall St. Rank hold UPB as of Q2 2026.

  • Arax Advisory Partners held 1,771 shares of Upstream Bio Inc worth $12.3K as of Q2 2026.
  • Arax Advisory Partners bought 1,694 Upstream Bio Inc shares in Q2 2026, an estimated $14.2K.
  • Upstream Bio Inc made up ﹤0.01% of Arax Advisory Partners's portfolio in Q2 2026, its #4238 holding.
  • Arax Advisory Partners first reported a position in Upstream Bio Inc in Q3 2025 and has held it in 4 quarters since.
  • 148 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q2 2026.

Based on Arax Advisory Partners's 13F filing for Q2 2026, filed 10 Aug 2026.