FMR LLC

Position in MCRB — Seres Therapeutics, Inc.

CIK 315066 BOSTON, MA

Back to MCRB Full portfolio

Position in MCRB

as of Jun 30, 2026 · filed Aug 13, 2026 Compact

Position Value

$12,055

-$3,485 QoQ

Shares Held

1,528

-12.8% QoQ

Ownership

0.015%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#25

of 36 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in MCRB Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

FMR LLC holds $61,424,667,384 across 370 Biotechnology names. MCRB ranks #304 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ARGX	Argenx SE	5,231,452	$4,853,584,218
2	ALNY	Alnylam Pharmaceuticals, Inc.	15,023,962	$4,522,663,276
3	MRNA	Moderna, Inc.	51,859,891	$3,631,748,165
4	ROIV	Roivant Sciences Ltd.	81,020,390	$2,867,311,601
5	RVMD	Revolution Medicines, Inc.	12,200,422	$2,284,895,029
6	IONS	Ionis Pharmaceuticals Inc	24,631,956	$1,953,067,789
7	INSM	INSMED Inc	16,143,583	$1,721,228,815
8	KRYS	Krystal Biotech, Inc.	4,418,197	$1,642,111,277

All Filings in MCRB

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26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$12,055	1,528	-12.8%	Shares	Defined	2026-08-13
2026-03-31	$15,540	1,752	+0.7%	Shares	Defined	2026-05-15
2025-12-31	$25,890	1,740	-7.5%	Shares	Defined	2026-02-17
2025-09-30	$36,209	1,882	-99.3%	Shares	Defined	2025-11-13
2025-06-30	$2,985,300	268,704	-98.8%	Shares	Defined	2025-08-14
2025-03-31	$15,322,601	21,889,432	+0.4%	Shares	Defined	2025-05-12
2024-12-31	$18,125,519	21,811,697	-4.6%	Shares	Defined	2025-02-13
2024-09-30	$21,622,967	22,857,260	+0.6%	Shares	Defined	2024-11-13
2024-06-30	$16,447,226	22,717,164	+0.3%	Shares	Defined	2024-08-13
2024-03-31	$17,532,198	22,651,419	+16.8%	Shares	Defined	2024-05-13
2023-12-31	$27,144,010	19,388,580	+0.8%	Shares	Defined	2024-02-13
2023-09-30	$45,769,046	19,230,692	+0.2%	Shares	Defined	2023-11-13
2023-06-30	$91,897,145	19,185,208	+1.4%	Shares	Defined	2023-08-11
2023-03-31	$107,227,966	18,911,458	+1.2%	Shares	Defined	2023-08-11
2022-12-31	$104,657,061	18,688,761	+0.4%	Shares	Defined	2023-02-13
2022-09-30	$119,480,905	18,610,733	+0.1%	Shares	Defined	2022-11-10
2022-06-30	$63,802,157	18,601,212	+34.0%	Shares	Defined	2022-08-12
2022-03-31	$98,810,397	13,877,865	+0.7%	Shares	Defined	2022-05-13
2021-12-31	$114,762,992	13,777,070	+0.1%	Shares	Defined	2022-02-14
2021-09-30	$95,754,182	13,757,785	+6.5%	Shares	Defined	2022-02-14
2021-06-30	$308,119,891	12,919,073	+5.2%	Shares	Defined	2021-08-13
2021-03-31	$252,859,057	12,280,673	+8.3%	Shares	Defined	2021-05-14
2020-12-31	$277,746,038	11,336,573	+5.8%	Shares	Defined	2021-02-08
2020-09-30	$303,409,594	10,717,400	+86.6%	Shares	Defined	2020-11-13
2020-06-30	$27,332,281	5,742,076	-6.6%	Shares	Defined	2020-08-24
2020-03-31	$21,954,593	6,149,746	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.