Russell Investments Group
UPB

Russell Investments Group’s Upstream Bio Inc UPB Stock Holding History

Russell Investments Group’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 		$329K Buy
47,543
+43,896
+1,204% +$368K ﹤0.01% 2978
2026
Q1 		$32.8K Buy
3,647
+824
+29% +$14.8K ﹤0.01% 3461
2025
Q4 		$76.6K Sell
2,823
-211
-7% -$5.25K ﹤0.01% 3151
2025
Q3 		$57.1K Buy
3,034
+2,887
+1,964% +$44.9K ﹤0.01% 3232
2025
Q2 		$1.61K Buy
+147
New +$1.36K ﹤0.01% 3615

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

Russell Investments Group's UPB Position: Q2 2026 in Review

Russell Investments Group increased its Upstream Bio Inc (UPB) stake by 1,204% in Q2 2026, buying an estimated $368K and bringing the position to 47,543 shares worth $329K. The position accounts for ﹤0.01% of the portfolio, ranked #2978.

Russell Investments Group first reported a position in UPB in Q2 2025 and has held it in 5 quarters since. 148 funds tracked by Wall St. Rank hold UPB as of Q2 2026.

  • Russell Investments Group held 47,543 shares of Upstream Bio Inc worth $329K as of Q2 2026.
  • Russell Investments Group bought 43,896 Upstream Bio Inc shares in Q2 2026, an estimated $368K.
  • Upstream Bio Inc made up ﹤0.01% of Russell Investments Group's portfolio in Q2 2026, its #2978 holding.
  • Russell Investments Group first reported a position in Upstream Bio Inc in Q2 2025 and has held it in 5 quarters since.
  • 148 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q2 2026.

Based on Russell Investments Group's 13F filing for Q2 2026, filed 6 Aug 2026.