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SERES THERAPEUTI (MCRB)
NASDAQ
$7.23+$0.06 (+0.84%)
Price as of Jun 03, 2026 7:25 PM EDT- $70.9MMarket Cap
- 0.56%1-Year Change
- BiotechnologyIndustry
SERES THERAPEUTI (MCRB)
$7.23+$0.06 (+0.84%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
FLAGSHIP VENTURES FUND IV, L.P. | 145.43% | 14.1M | +14.1M (+100.00%) | Mar 31, 2016 |
FLAGSHIP VENTURES FUND IV GENERAL PARTNER LLC | 130.97% | 12.7M | +12.7M (+100.00%) | Jun 30, 2016 |
CVI HOLDINGS, LLC | 28.12% | 2.7M | +2.7M (+100.00%) | Jun 30, 2022 |
BLACKROCK INC. | 18.20% | 1.8M | -5.1M (-287.33%) | Jun 30, 2024 |
BLACKROCK FUNDING, INC. /DE | 18.20% | 1.8M | 0 (0.00%) | Dec 31, 2024 |
FLAGSHIP PIONEERING INC. | 11.94% | 1.2M | 0 (0.00%) | Mar 31, 2026 |
BLACKROCK FUND ADVISORS | 11.39% | 1.1M | +109,263 (+9.90%) | Dec 31, 2016 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
FIDELITY MT VERNON STREET TRUST | 111.63% | 10.8M | 0 (0.00%) | Feb 28, 2026 |
SPDR SERIES TRUST | 77.61% | 7.5M | 0 (0.00%) | Jan 31, 2026 |
Ark ETF Trust | 63.72% | 6.2M | 0 (0.00%) | Jan 31, 2026 |
Federated Hermes Equity Funds | 62.09% | 6.0M | 0 (0.00%) | Jan 31, 2026 |
FIDELITY CONCORD STREET TRUST | 13.87% | 1.3M | 0 (0.00%) | Feb 28, 2026 |
VANGUARD EXPLORER FUND | 12.62% | 1.2M | 0 (0.00%) | Jan 31, 2026 |
JANUS INVESTMENT FUND | 9.99% | 967,347 | 0 (0.00%) | Mar 31, 2026 |
Current Ownership Distribution
- Institutions1.3B (69.65%)
- Mutual Funds499.1M (27.46%)
- Insiders52.6M (2.89%)
- Other0 (0.00%)
Insider Transactions
- 2.89% (52.6M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 4Number of InsiderSelling (last 12 months)
- $1.3MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Thorell Marella See Remarks | Award | Mar 04, 2026 | $0.00 | 22,500 | $0.00 | 22,500 |
Henn Matthew R. See Remarks | Award | Mar 04, 2026 | $0.00 | 75,000 | $0.00 | 75,000 |
Brady Kelly See Remarks | Award | Mar 04, 2026 | $0.00 | 56,250 | $0.00 | 56,250 |
DesRosier Thomas See Remarks | Award | Mar 04, 2026 | $0.00 | 22,500 | $0.00 | 22,500 |
Kender Richard N See Remarks | Award | Mar 04, 2026 | $0.00 | 150,000 | $0.00 | 150,000 |
Shaff Eric D. | Exempt | Feb 15, 2026 | $0.00 | 391 | $0.00 | 1,564 |
Henn Matthew R. See Remarks | Exempt | Feb 15, 2026 | $0.00 | 141 | $0.00 | 563 |
Shaff Eric D. | Exempt | Feb 15, 2026 | $0.00 | 333 | $0.00 | 2,656 |
Young Teresa L. See Remarks | Exempt | Feb 15, 2026 | $0.00 | 133 | $0.00 | 531 |
Shaff Eric D. | Exempt | Feb 15, 2026 | $0.00 | 723 | $0.00 | 11,836 |
DesRosier Thomas See Remarks | Exempt | Feb 15, 2026 | $0.00 | 133 | $0.00 | 531 |
Shaff Eric D. | Sell | Feb 15, 2026 | $2,193.73 | 259 | $8.47 | 11,577 |
Young Teresa L. See Remarks | Exempt | Feb 15, 2026 | $0.00 | 98 | $0.00 | 780 |
Henn Matthew R. See Remarks | Exempt | Feb 15, 2026 | $0.00 | 98 | $0.00 | 780 |
Young Teresa L. See Remarks | Exempt | Feb 15, 2026 | $0.00 | 231 | $0.00 | 8,632 |
DesRosier Thomas See Remarks | Exempt | Feb 15, 2026 | $0.00 | 111 | $0.00 | 890 |
Young Teresa L. See Remarks | Sell | Feb 15, 2026 | $635.25 | 75 | $8.47 | 8,557 |
Henn Matthew R. See Remarks | Exempt | Feb 15, 2026 | $0.00 | 239 | $0.00 | 7,766 |
DesRosier Thomas See Remarks | Exempt | Feb 15, 2026 | $0.00 | 244 | $0.00 | 7,867 |
Henn Matthew R. See Remarks | Sell | Feb 15, 2026 | $753.83 | 89 | $8.47 | 7,677 |
DesRosier Thomas See Remarks | Sell | Feb 15, 2026 | $660.66 | 78 | $8.47 | 7,789 |
Henn Matthew R. See Remarks | Exempt | Nov 15, 2025 | $0.00 | 3,998 | $0.00 | 0 |
DesRosier Thomas See Remarks | Exempt | Nov 15, 2025 | $0.00 | 132 | $0.00 | 664 |
Young Teresa L. See Remarks | Exempt | Nov 15, 2025 | $0.00 | 3,998 | $0.00 | 0 |
DesRosier Thomas See Remarks | Exempt | Nov 15, 2025 | $0.00 | 112 | $0.00 | 1,001 |
Henn Matthew R. See Remarks | Exempt | Nov 15, 2025 | $0.00 | 140 | $0.00 | 704 |
DesRosier Thomas See Remarks | Exempt | Nov 15, 2025 | $0.00 | 132 | $0.00 | 7,587 |
Shaff Eric D. | Exempt | Nov 15, 2025 | $0.00 | 390 | $0.00 | 1,954 |
DesRosier Thomas See Remarks | Exempt | Nov 15, 2025 | $0.00 | 112 | $0.00 | 7,699 |
Henn Matthew R. See Remarks | Exempt | Nov 15, 2025 | $0.00 | 98 | $0.00 | 878 |