SERES THERAPEUTICS INC (MCRB)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
38
Reporting holders
$19.5M
Reported value
23.2%
Of shares outstanding
6.8%
Held as options
+4
Holder change
Institutions report 2,305,464 shares against 9,941,261 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Flagship Pioneering, LLC | $9.1M | 1,155,850 | 0.59% | 5q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $2.3M | 287,776 | 0.00% | 2q | -2.2%-$50.2K |
| MARSHALL WACE, LLP | $1.4M | 172,245 | 0.00% | 5q | +23.4%+$258.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.1M | 58,328 | 0.00% | 5q | -44.6%-$847.2K |
| Vontobel Holding Ltd. | $970.3K | 122,975 | 0.00% | 5q | -11.2%-$122.2K |
| BlackRock, Inc. | $875.8K | 111,000 | 0.00% | 5q | +8.8%+$70.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $631.3K | 79,974 | 0.00% | 5q | +6.9%+$40.6K |
| CITADEL ADVISORS LLC | $426.1K | 10,504 | 0.00% | 5q | HELD |
| VANGUARD FIDUCIARY TRUST CO | $384.1K | 48,685 | 0.00% | 2q | +22.8%+$71.3K |
| STATE STREET CORP | $267.5K | 33,901 | 0.00% | 5q | HELD |
| Lion Point Capital, LP | $249.1K | 31,570 | 1.19% | 5q | HELD |
| GROUP ONE TRADING LLC | $245.5K | 3,714 | 0.00% | 5q | +350.7%+$191.0K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $245.0K | 31,049 | 0.00% | 5q | -1.8%-$4.6K |
| Sixth Street Partners Management Company, L.P. | $245.0K | 31,049 | 0.00% | new | NEW |
| AMERICAN CENTURY COMPANIES INC | $223.4K | 28,313 | 0.00% | 3q | -54.6%-$268.3K |
| SIMPLEX TRADING, LLC | $221.7K | 4,598 | 0.00% | 5q | +49.8%+$73.7K |
| XTX Topco Ltd | $163.6K | 20,732 | 0.00% | new | NEW |
| GOLDMAN SACHS GROUP INC | $120.2K | 15,229 | 0.00% | new | NEW |
| NORTHERN TRUST CORP | $116.5K | 14,765 | 0.00% | 5q | HELD |
| Invesco Ltd. | $102.4K | 12,974 | 0.00% | 4q | -10.8%-$12.4K |
| MORGAN STANLEY | $95.8K | 12,138 | 0.00% | 5q | -44.1%-$75.4K |
| SBI Securities Co., Ltd. | $33.0K | 4,182 | 0.00% | 6q | +20.1%+$5.5K |
| Integrated Wealth Concepts LLC | $31.6K | 4,000 | 0.00% | new | NEW |
| JPMORGAN CHASE & CO | $28.3K | 3,636 | 0.00% | new | NEW |
| Vanguard Global Advisers, LLC | $15.6K | 1,975 | 0.00% | 2q | HELD |
| FMR LLC | $12.1K | 1,528 | 0.00% | 5q | -12.8%-$1.8K |
| Rachor Investment Advisory Services, LLC | $11.7K | 1,477 | 0.01% | 3q | HELD |
| UBS Group AG | $3.8K | 484 | 0.00% | 5q | -93.1%-$51.6K |
| Tower Research Capital LLC (TRC) | $2.5K | 316 | 0.00% | 2q | -60.2%-$3.8K |
| BNP PARIBAS FINANCIAL MARKETS | $1.7K | 211 | 0.00% | 5q | HELD |
| BARCLAYS PLC | $1.3K | 167 | 0.00% | 4q | -97.4%-$50.0K |
| Continuum Advisory, LLC | $371 | 47 | 0.00% | new | NEW |
| MERCER GLOBAL ADVISORS INC /ADV | $292 | 37 | 0.00% | new | NEW |
| WELLS FARGO & COMPANY/MN | $79 | 10 | 0.00% | 5q | -50.0% |
| OSAIC HOLDINGS, INC. | $63 | 8 | 0.00% | 5q | HELD |
| Larson Financial Group LLC | $39 | 5 | 0.00% | new | NEW |
| WHITTIER TRUST CO OF NEVADA INC | $8 | 1 | 0.00% | new | NEW |
| ROYAL BANK OF CANADA | $0 | 11 | 0.00% | 2q | -88.7% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 38 | $19.5M | 2,305,464 | 9 | 7 | 13 | 6.8% |
| Q1 2026 | 34 | $22.8M | 2,306,473 | 3 | 9 | 9 | 10.1% |
| Q4 2025 | 39 | $44.5M | 2,504,465 | 8 | 14 | 5 | 18.2% |
| Q3 2025 | 41 | $59.2M | 2,123,100 | 13 | 11 | 8 | 31.0% |
| Q2 2025 | 36 | $27.2M | 2,291,892 | 38 | 0 | 1 | 6.4% |
| Q1 2025 | 60 | $43.1M | 61,421,010 | 8 | 14 | 13 | 0.3% |
| Q4 2024 | 65 | $55.1M | 62,927,922 | 7 | 14 | 18 | 5.0% |
| Q3 2024 | 71 | $61.4M | 63,252,680 | 9 | 15 | 21 | 2.5% |
| Q2 2024 | 86 | $50.1M | 68,528,312 | 18 | 22 | 27 | 0.9% |
| Q1 2024 | 89 | $66.8M | 84,747,995 | 15 | 26 | 25 | 1.2% |
| Q4 2023 | 92 | $122.5M | 86,735,546 | 12 | 22 | 37 | 0.8% |
| Q3 2023 | 121 | $260.3M | 106,393,477 | 18 | 44 | 28 | 2.7% |
| Q2 2023 | 124 | $539.0M | 109,167,761 | 32 | 53 | 22 | 3.0% |
| Q1 2023 | 102 | $685.2M | 120,181,932 | 16 | 31 | 28 | 0.6% |
| Q4 2022 | 99 | $564.4M | 100,302,948 | 16 | 27 | 28 | 0.5% |
| Q3 2022 | 122 | $746.9M | 115,895,160 | 21 | 48 | 29 | 0.5% |
| Q2 2022 | 124 | $314.1M | 90,888,400 | 18 | 31 | 48 | 0.5% |
| Q1 2022 | 132 | $542.4M | 75,454,521 | 6 | 41 | 51 | 0.9% |
| Q4 2021 | 151 | $659.9M | 78,068,823 | 31 | 43 | 41 | 1.5% |
| Q3 2021 | 134 | $562.6M | 79,613,237 | 27 | 47 | 33 | 1.3% |
| Q2 2021 | 148 | $2.0B | 81,298,412 | 19 | 56 | 46 | 2.7% |
| Q1 2021 | 155 | $1.9B | 89,997,684 | 26 | 58 | 45 | 2.1% |
| Q4 2020 | 156 | $2.2B | 86,807,137 | 50 | 49 | 34 | 1.5% |
| Q3 2020 | 121 | $2.5B | 86,072,268 | 41 | 40 | 29 | 4.1% |
| Q2 2020 | 98 | $349.4M | 71,992,490 | 30 | 40 | 16 | 2.0% |
| Q1 2020 | 76 | $272.1M | 76,253,478 | 10 | 26 | 25 | 0.0% |
| Q4 2019 | 76 | $230.1M | 66,668,343 | 10 | 36 | 16 | 0.1% |
| Q3 2019 | 78 | $259.3M | 64,315,570 | 10 | 34 | 18 | 0.5% |
| Q2 2019 | 88 | $203.9M | 62,013,303 | 26 | 33 | 13 | 2.2% |
| Q1 2019 | 82 | $232.8M | 33,830,263 | 16 | 29 | 17 | 0.1% |
| Q4 2018 | 70 | $144.5M | 31,944,080 | 1 | 0 | 2 | 0.1% |