Question 1

How many shares of MTSR does WELLINGTON MANAGEMENT GROUP LLP own?

Accepted Answer

WELLINGTON MANAGEMENT GROUP LLP previously held 0 shares of MTSR (METSERA INC) before exiting the position in 2025-Q4.

Question 2

What is WELLINGTON MANAGEMENT GROUP LLP's MTSR position worth?

Accepted Answer

WELLINGTON MANAGEMENT GROUP LLP's MTSR position was last reported at $0 in 2025-Q4 before the exit.

Question 3

Is WELLINGTON MANAGEMENT GROUP LLP buying or selling MTSR?

Accepted Answer

In 2025-Q4, WELLINGTON MANAGEMENT GROUP LLP exited their MTSR position entirely (-100.0% change in shares).

Question 4

When did WELLINGTON MANAGEMENT GROUP LLP first buy MTSR?

Accepted Answer

Based on available 13F filings, WELLINGTON MANAGEMENT GROUP LLP first reported a position in MTSR in 2025-Q1. They have held the position across 4 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2025-Q4 Latest	Exited	0	-100.0%	$0	0.0%	—	0
2025-Q3	Increased	3.7M	+6.8%	$191.5M	0.0%	—	33
2025-Q2	Increased	3.4M	+42.7%	$97.5M	0.0%	—	40
2025-Q1	New	2.4M	-	$65.4M	0.0%	—	41

MTSR4 quarters

MTSR
4 quarters