CIAM
UPB

Caitong International Asset Management’s Upstream Bio Inc UPB Stock Holding History

Caitong International 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
Q1 		$207 Buy
+23
New +$414 ﹤0.01% 1875
2025
Q3 		– Sell
-224
Closed -$2.46K – 2621
2025
Q2 		$2.46K Buy
+224
New +$2.07K ﹤0.01% 1316
2025
Q1 		– Sell
-44
Closed -$723 – 2586
2024
Q4 		$723 Buy
+44
New +$982 ﹤0.01% 1393

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

Caitong International Asset Management's UPB Position: Q1 2026 in Review

Caitong International Asset Management opened a new position in Upstream Bio Inc (UPB) in Q1 2026: 23 shares worth $207. The stake represents ﹤0.01% of the portfolio and ranks #1875 among its holdings. This is a return to the name: Caitong International Asset Management previously reported a position in UPB as recently as Q2 2025.

Caitong International Asset Management first reported a position in UPB in Q4 2024 and has held it in 3 quarters since. The position peaked at $2.46K in Q2 2025. 140 funds tracked by Wall St. Rank hold UPB as of Q1 2026.

  • Caitong International Asset Management held 23 shares of Upstream Bio Inc worth $207 as of Q1 2026.
  • Upstream Bio Inc was a new Caitong International Asset Management position in Q1 2026.
  • Upstream Bio Inc made up ﹤0.01% of Caitong International Asset Management's portfolio in Q1 2026, its #1875 holding.
  • Caitong International Asset Management first reported a position in Upstream Bio Inc in Q4 2024 and has held it in 3 quarters since.
  • Caitong International Asset Management's Upstream Bio Inc position peaked at $2.46K in Q2 2025.
  • 140 funds tracked by Wall St. Rank held Upstream Bio Inc as of Q1 2026.

Based on Caitong International Asset Management's 13F filing for Q1 2026, filed 11 May 2026.