N
UPB

Natixis’s Upstream Bio Inc UPB Stock Holding History

Natixis’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 		– Sell
-120
Closed -$1.08K – 1397
2026
Q1 		$1.08K Buy
+120
New +$2.16K ﹤0.01% 1064

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

Natixis's UPB Position: Q2 2026 in Review

Natixis sold out of Upstream Bio Inc (UPB) in Q2 2026, closing a stake of 120 shares — an estimated $1.08K sold.

Natixis first reported a position in UPB in Q1 2026 and held it in 1 quarter. The position peaked at $1.08K in Q1 2026. 149 funds tracked by Wall St. Rank hold UPB as of Q2 2026.

  • Natixis reported no remaining Upstream Bio Inc position as of Q2 2026 after selling out during the quarter.
  • Natixis sold 120 Upstream Bio Inc shares in Q2 2026, an estimated $1.08K.
  • Natixis first reported a position in Upstream Bio Inc in Q1 2026 and held it in 1 quarter.
  • Natixis's Upstream Bio Inc position peaked at $1.08K in Q1 2026.
  • 149 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q2 2026.

Based on Natixis's 13F filing for Q2 2026, filed 13 Aug 2026.