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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
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 $1.9T AUM 41.92% 1-Year Est. Return
RG
Redmile Group San Francisco, California $1.51B AUM 164.17% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
SB
Samsara BioCapital Palo Alto, California $1.03B AUM 214.94% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $23.7B AUM 65.43% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
BG
Bellevue Group Kuesnacht, Switzerland $4.2B AUM 54.85% 1-Year Est. Return

Siren LLC's SRRK Position: Q1 2026 in Review

Siren LLC held its Scholar Rock (SRRK) position steady in Q1 2026 at 10,825,013 shares worth $532M. The position accounts for 14.75% of the portfolio, ranked #1.

Siren LLC first reported a position in SRRK in Q3 2024 and has held it in 7 quarters since. 274 funds tracked by Wall St. Rank hold SRRK as of Q1 2026.

  • Siren LLC held 10,825,013 shares of Scholar Rock worth $532M as of Q1 2026.
  • Siren LLC left its Scholar Rock share count unchanged in Q1 2026.
  • Scholar Rock made up 14.75% of Siren LLC's portfolio in Q1 2026, its #1 holding.
  • Siren LLC first reported a position in Scholar Rock in Q3 2024 and has held it in 7 quarters since.
  • 274 funds tracked by Wall St. Rank held Scholar Rock as of Q1 2026.

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