SL
MTSR

Siren LLC’s Metsera Inc MTSR Stock Holding History

Siren LLC’s Portfolio MTSR Stock Details MTSR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-150,000
Closed -$4.08M – 131
2025
Q1 		$4.08M Buy
+150,000
New +$4.25M 0.23% 62

Other funds holding MTSR

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
AI
Alphabet Inc Mountain View, California $99.1B AUM 124.46% 1-Year Est. Return
SoftBank Group
SoftBank Group Tokyo, Japan $11.4B AUM 27.91% 1-Year Est. Return
MCMU
MIC Capital Management (UK) London, United Kingdom $352M AUM 0.23% 1-Year Est. Return
VA
VR Adviser New York $2.68B AUM 422.73% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
AWG
Alpha Wave Global New York $791M AUM 113.77% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

Siren LLC's MTSR Position: Q2 2025 in Review

Siren LLC sold out of Metsera Inc (MTSR) in Q2 2025, closing a stake of 150,000 shares — an estimated $4.08M sold.

Siren LLC first reported a position in MTSR in Q1 2025 and held it in 1 quarter. The position peaked at $4.08M in Q1 2025. 109 funds tracked by Wall St. Rank hold MTSR as of Q2 2025.

  • Siren LLC reported no remaining Metsera Inc position as of Q2 2025 after selling out during the quarter.
  • Siren LLC sold 150,000 Metsera Inc shares in Q2 2025, an estimated $4.08M.
  • Siren LLC first reported a position in Metsera Inc in Q1 2025 and held it in 1 quarter.
  • Siren LLC's Metsera Inc position peaked at $4.08M in Q1 2025.
  • 109 funds tracked by Wall St. Rank held Metsera Inc as of Q2 2025.

Based on Siren LLC's 13F filing for Q2 2025, filed 13 Aug 2025.