Seres Therapeutics, Inc. (MCRB) Institutional Ownership

Institutions by Trading Activity

8,771,519Shares Outstanding

2,455,772Shares held by institutions

$18,172,713Value of institutional holdings

28.00%Institutional ownership %

16.79%Shares Changed QoQ

35No. of institutional investors

Seres Therapeutics, Inc. (NASDAQ:MCRB) is held by 1 institutional investors per 13F filings through June 2025.

Their combined ownership stood at 0.0% of outstanding shares in June 2025, down from 715.5% in March 2025.
They maintained total shares held in Seres Therapeutics by 0.0% from the prior quarter, while the number of investors in MCRB decreased 98.94% year over year.
Of these 1 funds, 0 grew their exposure to Seres Therapeutics, 0 cut back, and 1 maintained positions.
In total, institutional investors held 160 shares in Seres Therapeutics as of June 2025, with no net change quarter on quarter, and down 69.71Mn shares year over year.
As of June 30, 2025, the biggest holder of Seres Therapeutics is Physician Wealth Advisors, Inc. at 142 shares, representing 0.0% of shares outstanding.
The largest buyers of Seres Therapeutics for the quarter ending June 2025 were Physician Wealth Advisors, Inc. (142).
Per Business Quant data, the top 1 holders of Seres Therapeutics for the quarter ending June 2025 are Physician Wealth Advisors, Inc. (142).

2,455,772 Total Shares Held

Rows:

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Flagship Pioneering, LLC	31 Dec, 2025	1,155,850	0	0.00%	$17,236,411.00
Flagship Pioneering, LLC	31 Dec, 2025	1,155,850	0	0.00%	$17,236,411.00
Flagship Pioneering, LLC	31 Dec, 2025	1,155,850	0	0.00%	$17,236,411.00
Flagship Pioneering, LLC	31 Dec, 2025	1,155,850	0	0.00%	$17,236,411.00
Flagship Pioneering, LLC	31 Dec, 2025	1,155,850	0	0.00%	$17,236,411.00
VANGUARD GROUP INC	31 Dec, 2025	324,214	12,325	3.95%	$4,824,304.00
VANGUARD GROUP INC	31 Dec, 2025	324,214	12,325	3.95%	$4,824,304.00
VANGUARD GROUP INC	31 Dec, 2025	324,214	12,325	3.95%	$4,824,304.00
VANGUARD GROUP INC	31 Dec, 2025	324,214	12,325	3.95%	$4,824,304.00
VANGUARD GROUP INC	31 Dec, 2025	324,214	12,325	3.95%	$4,824,304.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	179,929	179,929	0.00%	$2,677,344.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	179,929	179,929	0.00%	$2,677,344.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	179,929	179,929	0.00%	$2,677,344.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	179,929	179,929	0.00%	$2,677,344.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	179,929	179,929	0.00%	$2,677,344.00
MARSHALL WACE, LLP	31 Dec, 2025	120,177	-5,423	-4.32%	$1,788,234.00
MARSHALL WACE, LLP	31 Dec, 2025	120,177	-5,423	-4.32%	$1,788,234.00
MARSHALL WACE, LLP	31 Dec, 2025	120,177	-5,423	-4.32%	$1,788,234.00
MARSHALL WACE, LLP	31 Dec, 2025	120,177	-5,423	-4.32%	$1,788,234.00
MARSHALL WACE, LLP	31 Dec, 2025	120,177	-5,423	-4.32%	$1,788,234.00

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