Companies / Seres Therapeutics, Inc.
Seres Therapeutics, Inc.
Nasdaq: MCRBCIK 1609809CAMBRIDGE, MA
Financials · FY2025
Ownership
9.9M shares outstanding · as of Aug 3, 2026
Ownership
| Insiders | 0.36% | 35,600 |
| Institutions | 24.64% | 2,449,589 |
| Public float | 75.00% | 7,456,072 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 7
View all →| Insider | % of shares | Shares |
|---|---|---|
Shaff Eric D.Director | 0.12% | 11,577 |
Young Teresa L.See Remarks | 0.09% | 8,557 |
DesRosier ThomasSee Remarks | 0.08% | 7,789 |
Henn Matthew RSee Remarks | 0.08% | 7,677 |
Brady KellyFormerSee Remarks | — | — |
Kender Richard NSee Remarks · Director | — | — |
Thorell MarellaSee Remarks | — | — |
Institutional holders 36
View all →| Holder | Value | % of shares |
|---|---|---|
| $10.25M | 11.63% | |
| $4.82M | 3.26% | |
| $2.68M | 1.81% | |
| $1.54M | 1.04% | |
| $1.24M | 1.40% | |
| $875.8K | 1.12% | |
| $778.4K | 0.53% | |
| $664.1K | 0.75% | |
| $469.8K | 0.32% | |
| $467.5K | 0.32% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | OMERS Administration Corporation 13F manager | Exit | Common Stock | $-214.3K | -14K -100.00% | 0 | low |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | Add | Common Stock | $171.7K | +19K +16.11% | 139,539 1.40% of shares | low |
| Q1 2026 as of | Geode Capital Management, LLC 13F manager | Trim | Common Stock | $-100.3K | -11K -13.13% | 74,835 0.75% of shares | low |
| Q4 2025 as of | Barclays PLC 13F manager | Add | Common Stock | $89.6K | +6K +427.84% | 7,432 0.07% of shares | low |
| Q4 2025 as of | Bank of America Corp /De 13F manager | Trim | Common Stock | $-76.6K | -5K -96.35% | 195 <0.01% of shares | low |
| Q1 2026 as of | Two Sigma Investments, LP 13F manager | Trim | Common Stock | $-61.7K | -7K -27.01% | 18,794 0.19% of shares | low |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common Stock | $58.2K | +7K +7.12% | 111,000 1.12% of shares | low |
| Q3 2025 as of | Barclays PLC 13F manager | New | Common Stock | $27.1K | +1K | 1,408 0.01% of shares | low |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| MCRB | Common Stock | 81750R201 |