SL
ONC

Siren LLC’s BeOne Medicines Ltd ONC Stock Holding History

Siren LLC’s Portfolio ONC Stock Details ONC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$138M Sell
465,000
-35,000
-7% -$11.3M 3.83% 5
2025
Q4 		$152M Buy
500,000
+7,010
+1% +$2.29M 4.53% 3
2025
Q3 		$168M Sell
492,990
-17,000
-3% -$5.16M 6.57% 3
2025
Q2 		$123M Buy
509,990
+11,301
+2% +$2.77M 6.39% 3
2025
Q1 		$136M Sell
498,689
-155,032
-24% -$36.2M 7.66% 2
2024
Q4 		$121M Buy
653,721
+90,407
+16% +$18.5M 5.33% 2
2024
Q3 		$126M Buy
+563,314
New +$101M 6.32% 2

Other funds holding ONC

BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
HA
HHLR Advisors Grand Cayman, Cayman Islands $1.67B AUM 7.53% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Temasek Holdings
Temasek Holdings Singapore $30.5B AUM 13.98% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Siren LLC's ONC Position: Q1 2026 in Review

Siren LLC reduced its BeOne Medicines Ltd (ONC) stake by 7% in Q1 2026, selling an estimated $11.3M and leaving 465,000 shares worth $138M. The position accounts for 3.83% of the portfolio, ranked #5.

Siren LLC first reported a position in ONC in Q3 2024 and has held it in 7 quarters since. The position peaked at $168M in Q3 2025. 281 funds tracked by Wall St. Rank hold ONC as of Q1 2026.

  • Siren LLC held 465,000 shares of BeOne Medicines Ltd worth $138M as of Q1 2026.
  • Siren LLC sold 35,000 BeOne Medicines Ltd shares in Q1 2026, an estimated $11.3M.
  • BeOne Medicines Ltd made up 3.83% of Siren LLC's portfolio in Q1 2026, its #5 holding.
  • Siren LLC first reported a position in BeOne Medicines Ltd in Q3 2024 and has held it in 7 quarters since.
  • Siren LLC's BeOne Medicines Ltd position peaked at $168M in Q3 2025.
  • 281 funds tracked by Wall St. Rank held BeOne Medicines Ltd as of Q1 2026.

Based on Siren LLC's 13F filing for Q1 2026, filed 14 May 2026.