SL
CGEM icon

Siren LLC’s Cullinan Oncology CGEM Stock Holding History

Siren LLC’s Portfolio CGEM Stock Details CGEM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$34.5M Buy
1,893,410
+700,000
+59% +$10.4M 0.7% 39
2026
Q1 		$17M Hold
1,193,410
– – 0.47% 46
2025
Q4 		$12.4M Hold
1,193,410
– – 0.37% 46
2025
Q3 		$7.08M Hold
1,193,410
– – 0.28% 56
2025
Q2 		$8.99M Hold
1,193,410
– – 0.47% 44
2025
Q1 		$9.03M Sell
1,193,410
-17,947
-1% -$172K 0.51% 42
2024
Q4 		$14.8M Hold
1,211,357
– – 0.65% 40
2024
Q3 		$20.3M Buy
+1,211,357
New +$21.5M 1.01% 31

Other funds holding CGEM

MB
MPM BioImpact Boston, Massachusetts $1.64B AUM 245.64% 1-Year Est. Return
LCM
Lynx1 Capital Management San Juan, Puerto Rico $866M AUM 231.68% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.91B AUM 304.52% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
KCM
Kynam Capital Management Princeton, New Jersey $1.81B AUM 192.15% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
RI
RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Siren LLC's CGEM Position: Q2 2026 in Review

Siren LLC increased its Cullinan Oncology (CGEM) stake by 59% in Q2 2026, buying an estimated $10.4M and bringing the position to 1,893,410 shares worth $34.5M. The position accounts for 0.7% of the portfolio, ranked #39.

Siren LLC first reported a position in CGEM in Q3 2024 and has held it in 8 quarters since. 184 funds tracked by Wall St. Rank hold CGEM as of Q2 2026.

  • Siren LLC held 1,893,410 shares of Cullinan Oncology worth $34.5M as of Q2 2026.
  • Siren LLC bought 700,000 Cullinan Oncology shares in Q2 2026, an estimated $10.4M.
  • Cullinan Oncology made up 0.7% of Siren LLC's portfolio in Q2 2026, its #39 holding.
  • Siren LLC first reported a position in Cullinan Oncology in Q3 2024 and has held it in 8 quarters since.
  • 184 funds tracked by Wall St. Rank held Cullinan Oncology as of Q2 2026.

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