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
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 $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

Arax Advisory Partners's UPB Position: Q1 2026 in Review

Arax Advisory Partners increased its Upstream Bio Inc (UPB) stake by 3,750% in Q1 2026, buying an estimated $1.35K and bringing the position to 77 shares worth $693. The position accounts for ﹤0.01% of the portfolio, ranked #3364.

Arax Advisory Partners first reported a position in UPB in Q3 2025 and has held it in 3 quarters since. The position peaked at $2.8K in Q3 2025. 140 funds tracked by Wall St. Rank hold UPB as of Q1 2026.

  • Arax Advisory Partners held 77 shares of Upstream Bio Inc worth $693 as of Q1 2026.
  • Arax Advisory Partners bought 75 Upstream Bio Inc shares in Q1 2026, an estimated $1.35K.
  • Upstream Bio Inc made up ﹤0.01% of Arax Advisory Partners's portfolio in Q1 2026, its #3364 holding.
  • Arax Advisory Partners first reported a position in Upstream Bio Inc in Q3 2025 and has held it in 3 quarters since.
  • Arax Advisory Partners's Upstream Bio Inc position peaked at $2.8K in Q3 2025.
  • 140 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q1 2026.

Based on Arax Advisory Partners's 13F filing for Q1 2026, filed 13 May 2026.