EcoR1 Capital, LLC

SEC CIK: 0001587114
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

MTSR holding history

Metsera, Inc. in every 13F filed by EcoR1 Capital, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MTSR overview All 13F holders of MTSR Full Q2 2026 holdings

Shares (Q4 2025): 0; Sold out in Q4 2025
Value: $0
% of portfolio: 0.0%
Quarters held: 3; Since Q1 2025

Holdings of MTSR by EcoR1 Capital, LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q4 2025	0	$0	0.0%	−271,529−100.0%	Sold out	Holders
Q3 2025	271,529	$14.2M	0.7%	00.0%	Unchanged	Holders
Q2 2025	271,529	$7.72M	0.5%	+221,529+443.1%	Added	Holders
Q1 2025	50,000	$1.36M	0.1%	+50,000	New	Holders