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Siren LLC’s Olema Pharmaceuticals OLMA Stock Holding History

Siren LLC’s Portfolio OLMA Stock Details OLMA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$70.9M Buy
4,756,949
+1,456,249
+44% +$32.4M 1.97% 12
2025
Q4 		$82.5M Buy
+3,300,700
New +$58.7M 2.46% 9

Other funds holding OLMA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $4.89B AUM 251.12% 1-Year Est. Return
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.14B AUM 249.53% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
CAM
Cormorant Asset Management Boston, Massachusetts $1.99B AUM 737.95% 1-Year Est. Return
LGM
Logos Global Management San Francisco, California $2B AUM 444.09% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Siren LLC's OLMA Position: Q1 2026 in Review

Siren LLC increased its Olema Pharmaceuticals (OLMA) stake by 44% in Q1 2026, buying an estimated $32.4M and bringing the position to 4,756,949 shares worth $70.9M. The position accounts for 1.97% of the portfolio, ranked #12.

Siren LLC first reported a position in OLMA in Q4 2025 and has held it in 2 quarters since. The position peaked at $82.5M in Q4 2025. 195 funds tracked by Wall St. Rank hold OLMA as of Q1 2026.

  • Siren LLC held 4,756,949 shares of Olema Pharmaceuticals worth $70.9M as of Q1 2026.
  • Siren LLC bought 1,456,249 Olema Pharmaceuticals shares in Q1 2026, an estimated $32.4M.
  • Olema Pharmaceuticals made up 1.97% of Siren LLC's portfolio in Q1 2026, its #12 holding.
  • Siren LLC first reported a position in Olema Pharmaceuticals in Q4 2025 and has held it in 2 quarters since.
  • Siren LLC's Olema Pharmaceuticals position peaked at $82.5M in Q4 2025.
  • 195 funds tracked by Wall St. Rank held Olema Pharmaceuticals as of Q1 2026.

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