Question 1

Does Vanguard Group own MCRB stock?

Accepted Answer

As of its last 13F, for Q4 2025, Vanguard Group held 324,214 shares of MCRB (Seres Therapeutics), worth $4.8M.

Question 2

How many shares of MCRB does Vanguard Group own?

Accepted Answer

As of its last 13F, for Q4 2025, Vanguard Group held 324,214 shares of MCRB (Seres Therapeutics).

Question 3

What is Vanguard Group's MCRB position worth?

Accepted Answer

As of its last 13F, for Q4 2025, Vanguard Group's MCRB position was worth $4.8M.

Question 4

Is Vanguard Group buying or selling MCRB?

Accepted Answer

In Q4 2025, Vanguard Group increased its MCRB position by 12,325 shares (+4.0%).

Question 5

When did Vanguard Group first buy MCRB?

Accepted Answer

Vanguard Group already held MCRB in its Q2 2025 13F, the earliest on record, and listed it in 3 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2025-Q4 Latest	Increased	324,214	+4.0%	$4.8M	0.0%	$14.44	28
2025-Q3	Increased	311,889	+6.8%	$6M	0.0%	$18.69	29
2025-Q2	New	292,096	-	$3.2M	0.0%	$9.10	37

MCRB3 quarters

MCRB
3 quarters