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Siren LLC’s Scholar Rock SRRK Stock Holding History

Siren LLC’s Portfolio SRRK Stock Details SRRK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$527M Sell
9,575,013
-1,250,000
-12% -$60.4M 10.66% 1
2026
Q1 		$532M Hold
10,825,013
– – 14.75% 1
2025
Q4 		$477M Buy
10,825,013
+1,575,008
+17% +$59.1M 14.22% 1
2025
Q3 		$344M Hold
9,250,005
– – 13.48% 1
2025
Q2 		$328M Hold
9,250,005
– – 16.95% 1
2025
Q1 		$297M Hold
9,250,005
– – 16.78% 1
2024
Q4 		$400M Sell
9,250,005
-2,009,433
-18% -$65.4M 17.66% 1
2024
Q3 		$90.2M Buy
+11,259,438
New +$98.9M 4.51% 3

Other funds holding SRRK

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
SB
Samsara BioCapital Palo Alto, California $1.22B AUM 242.83% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $29.1B AUM 60.8% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
RG
Redmile Group San Francisco, California $1.49B AUM 208.7% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM

Siren LLC's SRRK Position: Q2 2026 in Review

Siren LLC reduced its Scholar Rock (SRRK) stake by 12% in Q2 2026, selling an estimated $60.4M and leaving 9,575,013 shares worth $527M. The position accounts for 10.66% of the portfolio, ranked #1.

Siren LLC first reported a position in SRRK in Q3 2024 and has held it in 8 quarters since. The position peaked at $532M in Q1 2026. 307 funds tracked by Wall St. Rank hold SRRK as of Q2 2026.

  • Siren LLC held 9,575,013 shares of Scholar Rock worth $527M as of Q2 2026.
  • Siren LLC sold 1,250,000 Scholar Rock shares in Q2 2026, an estimated $60.4M.
  • Scholar Rock made up 10.66% of Siren LLC's portfolio in Q2 2026, its #1 holding.
  • Siren LLC first reported a position in Scholar Rock in Q3 2024 and has held it in 8 quarters since.
  • Siren LLC's Scholar Rock position peaked at $532M in Q1 2026.
  • 307 funds tracked by Wall St. Rank held Scholar Rock as of Q2 2026.

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