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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
Q2 		$60.8M Buy
4,856,949
+100,000
+2% +$1.34M 1.23% 29
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 $2.3T AUM 54.33% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $5.34B AUM 380.18% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.68B AUM 126.09% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.91B AUM 304.52% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
LGM
Logos Global Management San Francisco, California $2.32B AUM 536.01% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return

Siren LLC's OLMA Position: Q2 2026 in Review

Siren LLC increased its Olema Pharmaceuticals (OLMA) stake by 2.1% in Q2 2026, buying an estimated $1.34M and bringing the position to 4,856,949 shares worth $60.8M. The position accounts for 1.23% of the portfolio, ranked #29.

Siren LLC first reported a position in OLMA in Q4 2025 and has held it in 3 quarters since. The position peaked at $82.5M in Q4 2025. 186 funds tracked by Wall St. Rank hold OLMA as of Q2 2026.

  • Siren LLC held 4,856,949 shares of Olema Pharmaceuticals worth $60.8M as of Q2 2026.
  • Siren LLC bought 100,000 Olema Pharmaceuticals shares in Q2 2026, an estimated $1.34M.
  • Olema Pharmaceuticals made up 1.23% of Siren LLC's portfolio in Q2 2026, its #29 holding.
  • Siren LLC first reported a position in Olema Pharmaceuticals in Q4 2025 and has held it in 3 quarters since.
  • Siren LLC's Olema Pharmaceuticals position peaked at $82.5M in Q4 2025.
  • 186 funds tracked by Wall St. Rank held Olema Pharmaceuticals as of Q2 2026.

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