SERES THERAPEUTICS INC

Historical 13F Holders

Symbol: MCRB
CUSIP: 81750R201
All holders as of: Q2 2026
Type: Equity
Class: COM NEW

Reported Value, Excluding Options

Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 81750R201 since 12/18/2024, newest first.

Filer	% of Class	Shares	Form	Filed
FMR LLC 13G/A Amendment 14	3.1%	268,704	13G/A Amendment 14	8/6/2025 Event 6/30/2025
FMR LLC	3.1%	268,704
Abigail P. Johnson	3.1%	268,704
FMR LLC 13G/A Amendment 13	5.7%	493,608	13G/A Amendment 13	6/6/2025 Event 5/30/2025
FMR LLC	5.7%	493,608
Abigail P. Johnson	5.7%	493,608

13F Holders by Quarter

Period	Filings	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q3	2	118 k	$396 k	$0
2026 Q2	38	2.27 M	$17.9 M	$934 k
2026 Q1	36	2.31 M	$20.5 M	$1.61 M
2025 Q4	41	2.44 M	$36.4 M	$4.47 M
2025 Q3	45	2.13 M	$40.9 M	$16.0 M
2025 Q2	38	2.29 M	$25.5 M	$1.38 M
2025 Q1	4	145 k	$102 k	$0
2020 Q4	1	2.00	$49.00	$0