Seres Therapeutics
MCRB · NASDAQ
$2.31−$0.11 (−4.55%)TodayMarket closed ·
Prev close $2.42
Who owns MCRB
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 32.6% of MCRB’s shares.
- Flagship Ventures11.9%
- Nestle SA11.3%
- Vanguard Capital Management, LLC3.0%
- Marshall Wace LLP1.8%
- Next 6 largest institutions4.7%
- All other shareholders67.4%
| Holder | Shares | % of shares |
|---|---|---|
| Flagship Ventures | 1.16M | 11.94% |
| Nestle SA | 1.09M | 11.25% |
| Vanguard Capital Management, LLC | 287.78K | 2.97% |
| Marshall Wace LLP | 172.25K | 1.78% |
| Bank Vontobel AG | 122.97K | 1.27% |
| BlackRock Institutional Trust Company, N.A. | 109.30K | 1.13% |
| Geode Capital Management, L.L.C. | 79.97K | 0.83% |
| Susquehanna International Group, LLP | 58.33K | 0.60% |
| Vanguard Fiduciary Trust Co | 48.69K | 0.50% |
| State Street Investment Management (US) | 33.90K | 0.35% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 206.17K | 2.13% |
| Vanguard Extended Market Index Fund | 75.85K | 0.78% |
| Fidelity Extended Market Index Fund | 36.63K | 0.38% |
| Schwab U.S. Small-Cap ETF | 30.83K | 0.32% |
| iShares Micro-Cap ETF | 25.72K | 0.27% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $5.80K (8 trades) of MCRB on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Brady Kelly | Sale | 64 | $291 |
| Shaff Eric D. | Sale | 263 | $1.20K |
| Henn Matthew R | Sale | 81 | $369 |
| DesRosier Thomas | Sale | 82 | $373 |
| Brady Kelly | Option exercise | 91 | — |
| Brady Kelly | Option exercise | 90 | — |
| Brady Kelly | Option exercise | 181 | — |
| Shaff Eric D. | Option exercise | 332 | — |
| Shaff Eric D. | Option exercise | 390 | — |
| Shaff Eric D. | Option exercise | 722 | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 314.26K
- Days to cover
- 5.15
- % of shares outstanding
- 3.25%
- Average daily volume
- 61.07K
- Change since last report
- +4.3%
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