Question 1

How many shares of MTSR does BlackRock, Inc. own?

Accepted Answer

BlackRock, Inc. previously held 0 shares of MTSR (METSERA INC) before exiting the position in 2025-Q4.

Question 2

What is BlackRock, Inc.'s MTSR position worth?

Accepted Answer

BlackRock, Inc.'s MTSR position was last reported at $0 in 2025-Q4 before the exit.

Question 3

Is BlackRock, Inc. buying or selling MTSR?

Accepted Answer

In 2025-Q4, BlackRock, Inc. exited their MTSR position entirely (-100.0% change in shares).

Question 4

When did BlackRock, Inc. first buy MTSR?

Accepted Answer

Based on available 13F filings, BlackRock, Inc. 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	3.8M	+210.0%	$200.7M	0.0%	—	49
2025-Q2	Decreased	1.2M	-31.8%	$35.2M	0.0%	—	0
2025-Q1	New	1.8M	-	$49.4M	0.0%	—	41

MTSR4 quarters

MTSR
4 quarters