Seres Therapeutics, Inc. - MCRB

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q4 2025 · Compare: Q3 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
Flagship Pioneering, LLC History No change 1,155,850 17,236 5.32% 7.6% 1 0 0.0% Q4 2025 Feb 17, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Reduced 332,829 4,952 0.0% 0.0% 2 -60,071 -15.29% Q4 2025 Feb 17, 2026
VANGUARD GROUP INC History Added to 324,214 4,824 0.0% 0.0% 3 +12,325 3.95% Q4 2025 Jan 29, 2026
MARSHALL WACE, LLP History Reduced 120,177 1,788 0.0% 0.0% 4 -5,423 -4.32% Q4 2025 Feb 13, 2026
BlackRock, Inc. History Added to 103,621 1,541 0.0% 0.0% 5 +1,561 1.53% Q4 2025 Feb 12, 2026
Vontobel Holding Ltd. History Added to 103,234 1,536 0.0% 0.01% 6 +4,723 4.79% Q4 2025 Feb 13, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 86,142 1,282 0.0% 0.0% 7 +1,160 1.36% Q4 2025 Feb 09, 2026
Caption Management, LLC History No change 75,000 1,116 0.01% 0.01% 8 0 0.0% Q4 2025 Feb 17, 2026
CITADEL ADVISORS LLC History Reduced 74,248 1,104 0.0% 0.0% 9 -10,977 -12.88% Q4 2025 Feb 17, 2026
683 Capital Management, LLC History New 52,314 778 0.03% 10 +52,314 New Q4 2025 Feb 17, 2026
STATE STREET CORP History Added to 33,901 504 0.0% 0.0% 11 +4,170 14.03% Q4 2025 Feb 13, 2026
Lion Point Capital, LP History Added to 31,570 469 2.43% 2.97% 12 +4,432 16.33% Q4 2025 Feb 17, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Reduced 31,369 466 0.0% 0.0% 13 -34 -0.11% Q4 2025 Feb 13, 2026
JANE STREET GROUP, LLC History Reduced 29,905 444 0.0% 0.0% 14 -38,195 -56.09% Q4 2025 Feb 12, 2026
Schonfeld Strategic Advisors LLC History Added to 29,097 432 0.0% 0.0% 15 +155 0.54% Q4 2025 Feb 17, 2026
TWO SIGMA INVESTMENTS, LP History New 25,749 383 0.0% 16 +25,749 New Q4 2025 Feb 17, 2026
MORGAN STANLEY History Added to 25,126 373 0.0% 0.0% 17 +6,792 37.05% Q4 2025 Feb 13, 2026
GROUP ONE TRADING LLC History Reduced 19,800 294 0.0% 0.0% 18 -200 -1.0% Q4 2025 Feb 12, 2026
AMERICAN CENTURY COMPANIES INC History New 16,271 242 0.0% 19 +16,271 New Q4 2025 Feb 13, 2026
NORTHERN TRUST CORP History Added to 14,765 219 0.0% 0.0% 20 +2,664 22.01% Q4 2025 Feb 17, 2026
OMERS ADMINISTRATION Corp History New 14,400 214 0.0% 21 +14,400 New Q4 2025 Feb 13, 2026
GOLDMAN SACHS GROUP INC History New 14,340 213 0.0% 22 +14,340 New Q4 2025 Mar 25, 2026
Invesco Ltd. History Added to 14,360 213 0.0% 0.0% 23 +3,918 37.52% Q4 2025 Feb 19, 2026
ExodusPoint Capital Management, LP History New 12,737 189 0.0% 24 +12,737 New Q4 2025 Feb 17, 2026
SIMPLEX TRADING, LLC History Reduced 10,932 162 0.0% 0.0% 25 -3,375 -23.59% Q4 2025 Feb 11, 2026
BARCLAYS PLC History Added to 7,432 110 0.0% 0.0% 26 +6,024 427.84% Q4 2025 Feb 13, 2026
UBS Group AG History Reduced 4,226 62 0.0% 0.0% 27 -8,456 -66.68% Q4 2025 Jan 29, 2026
SBI Securities Co., Ltd. History No change 3,482 51 0.0% 0.0% 28 0 0.0% Q4 2025 Feb 03, 2026
FMR LLC History Reduced 1,740 25 0.0% 0.0% 29 -142 -7.55% Q4 2025 Feb 17, 2026
Rachor Investment Advisory Services, LLC History New 1,477 21 0.01% 30 +1,477 New Q4 2025 Jan 30, 2026
BNP PARIBAS FINANCIAL MARKETS History Added to 773 11 0.0% 0.0% 31 +561 264.62% Q4 2025 Feb 10, 2026
WELLS FARGO & COMPANY/MN History Added to 260 3 0.0% 32 +250 2500.0% Q4 2025 Feb 13, 2026
BANK OF AMERICA CORP /DE/ History Reduced 195 2 0.0% 0.0% 33 -5,148 -96.35% Q4 2025 Feb 17, 2026
Physician Wealth Advisors, Inc. History No change 142 2 0.0% 0.0% 34 0 0.0% Q4 2025 Jan 29, 2026
Hudson Bay Capital Management LP History Closed out 0 0 0.01% -125,000 -100.0% Q3 2025 Dec 15, 2025
J. Goldman & Co LP History Closed out 0 0 0.04% -88,900 -100.0% Q3 2025 Nov 14, 2025
Centiva Capital, LP History Closed out 0 0 0.0% -25,000 -100.0% Q3 2025 Nov 14, 2025
Belvedere Trading LLC History Closed out 0 0 0.0% -12,200 -100.0% Q3 2025 Oct 27, 2025
CITIGROUP INC History Closed out 0 0 0.0% -2,621 -100.0% Q3 2025 Nov 10, 2025
JPMORGAN CHASE & CO History Closed out 0 0 0.0% -65 -100.0% Q3 2025 Nov 26, 2025
NATIONAL BANK OF CANADA /FI/ History Closed out 0 0 0.0% -26 -100.0% Q3 2025 Nov 14, 2025
US BANCORP \DE\ History Closed out 0 0 -12 -100.0% Q3 2025 Nov 12, 2025
ROYAL BANK OF CANADA History New 9 0 +9 New Q4 2025 Feb 17, 2026
Allworth Financial LP History New 4 0 +4 New Q4 2025 Feb 05, 2026
Federation des caisses Desjardins du Quebec History Closed out 0 0 -3 -100.0% Q3 2025 Nov 14, 2025
Arax Advisory Partners History No change 2 0 0 0.0% Q4 2025 Feb 13, 2026
OSAIC HOLDINGS, INC. History No change 8 0 0 0.0% Q4 2025 Feb 17, 2026
Sound Income Strategies, LLC History No change 8 0 0 0.0% Q4 2025 Jan 21, 2026