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
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 $1.9T AUM 41.92% 1-Year Est. Return
O
OrbiMed New York $5.05B AUM 125.28% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
DC
Decheng Capital Menlo Park, California $661M AUM 299.97% 1-Year Est. Return
ES
Enavate Sciences Menlo Park, California $352M AUM 220.14% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
YIH
Y-Intercept (HK) Hong Kong $5.05B AUM 17.89% 1-Year Est. Return
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $61.5B AUM 30.7% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Russell Investments Group's UPB Position: Q1 2026 in Review

Russell Investments Group increased its Upstream Bio Inc (UPB) stake by 29% in Q1 2026, buying an estimated $14.8K and bringing the position to 3,647 shares worth $32.8K. The position accounts for ﹤0.01% of the portfolio, ranked #3461.

Russell Investments Group first reported a position in UPB in Q2 2025 and has held it in 4 quarters since. The position peaked at $76.6K in Q4 2025. 140 funds tracked by Wall St. Rank hold UPB as of Q1 2026.

  • Russell Investments Group held 3,647 shares of Upstream Bio Inc worth $32.8K as of Q1 2026.
  • Russell Investments Group bought 824 Upstream Bio Inc shares in Q1 2026, an estimated $14.8K.
  • Upstream Bio Inc made up ﹤0.01% of Russell Investments Group's portfolio in Q1 2026, its #3461 holding.
  • Russell Investments Group first reported a position in Upstream Bio Inc in Q2 2025 and has held it in 4 quarters since.
  • Russell Investments Group's Upstream Bio Inc position peaked at $76.6K in Q4 2025.
  • 140 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q1 2026.

Based on Russell Investments Group's 13F filing for Q1 2026, filed 8 May 2026.