SEB Asset Management
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SEB Asset Management’s Upstream Bio Inc UPB Stock Holding History

SEB Asset Management’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
Q3 		$4.63M Hold
878,473
– – 0.02% 467
2026
Q2 		$6.08M Hold
878,473
– – 0.02% 422
2026
Q1 		$7.91M Buy
+878,473
New +$15.8M 0.03% 360

Other funds holding UPB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Decheng Capital
Decheng Capital Menlo Park, California $685M AUM 129.22% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $123B AUM 30.05% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
BNP Paribas Financial Markets
BNP Paribas Financial Markets Paris, France $294B AUM 47.59% 1-Year Est. Return

SEB Asset Management's UPB Position: Q3 2026 in Review

SEB Asset Management held its Upstream Bio Inc (UPB) position steady in Q3 2026 at 878,473 shares worth $4.63M. The position accounts for 0.02% of the portfolio, ranked #467.

SEB Asset Management first reported a position in UPB in Q1 2026 and has held it in 3 quarters since. The position peaked at $7.91M in Q1 2026. 87 funds tracked by Wall St. Rank hold UPB as of Q3 2026.

  • SEB Asset Management held 878,473 shares of Upstream Bio Inc worth $4.63M as of Q3 2026.
  • SEB Asset Management left its Upstream Bio Inc share count unchanged in Q3 2026.
  • Upstream Bio Inc made up 0.02% of SEB Asset Management's portfolio in Q3 2026, its #467 holding.
  • SEB Asset Management first reported a position in Upstream Bio Inc in Q1 2026 and has held it in 3 quarters since.
  • SEB Asset Management's Upstream Bio Inc position peaked at $7.91M in Q1 2026.
  • 87 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q3 2026.

Based on SEB Asset Management's 13F filing for Q3 2026, filed 4 Nov 2026.