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Disclosery

MCRB SERES THERAPEUTICS INC

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CMN (common), issuer CIK 1609809

32 managers (32 13F filers) reported a position in MCRB shares at 2025-09-30, 2,125,851 shares in all. 9 filers opened a position and 10 filers sold out during the quarter.

Managers
32
13F filers
32
New
9
Added
10
Reduced
7
Sold out
10
Shares held by filers
2,125,851

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Flagship Pioneering, LLCin group Flagship Pioneering, LLC1,155,850$22.2M7.6%013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC311,889$6M<0.01%+19,79313F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP125,600$2.42M<0.01%+34,19513F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.102,060$1.96M<0.01%+70913F-HRTimelineGroup
Vontobel Holding Ltd.in group Vontobel Holding Ltd.98,511$1.9M0.01%+18,18613F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC84,982$1.64M<0.01%-6,62013F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co31,403$604K<0.01%-3,47313F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC30,885$594K<0.01%new13F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP29,731$572K<0.01%+2,90013F-HRTimelineGroup
Schonfeld Strategic Advisors LLC28,942$557K<0.01%new13F-HRTimeline
Lion Point Capital, LP27,138$522K2.97%+10,10013F-HRTimeline
J. Goldman & Co LP27,000$519K0.02%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY18,334$353K<0.01%+10,49613F-HR/ATimelineGroup
UBS Group AGin group UBS Group AG12,682$244K<0.01%+5,15013F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP12,101$233K<0.01%-2,97513F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.10,442$201K<0.01%new13F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/5,343$103K<0.01%+5,15713F-HR/ATimelineGroup
SBI Securities Co., Ltd.3,482$67K<0.01%013F-HRTimeline
SIMPLEX TRADING, LLC2,807$54K<0.01%new13F-HRTimeline
CITIGROUP INCin group CITIGROUP INC2,621$50.4K<0.01%+2,61213F-HRTimelineGroup
FMR LLCin group FMR LLC1,882$36.2K<0.01%-266,82213F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC1,408$27.1K<0.01%new13F-HR/ATimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA296$6K<0.01%-6,65813F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS212$4.08K<0.01%-9313F-HRTimelineGroup
Physician Wealth Advisors, Inc.142$2.73K<0.01%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO65$1.25K<0.01%013F-HR/ATimelineGroup
US BANCORP \DE\in group US BANCORP \DE\12$231<0.01%-1313F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN10$192<0.01%013F-HRTimelineGroup
Sound Income Strategies, LLC8$156<0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.8$151<0.01%013F-HRTimelineGroup
Federation des caisses Desjardins du Qu…3$58<0.01%new13F-HRTimeline
Arax Advisory Partners2$38<0.01%new13F-HRTimeline