Shaff Eric D.
SEC CIK 1643734 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| MCRB | Seres Therapeutics, Inc. | Dir | 12.5K | — | $60.4K | 27 | 2022-07-05 | 2026-08-17 |
Most active insiders at MCRB, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Henn Matthew R | See Remarks | — | $23.4K |
| 2 | Young Teresa L. | See Remarks | — | $18.7K |
| 3 | Shaff Eric D. | Dir | — | $9,095 |
| 4 | DesRosier Thomas | See Remarks | — | $2,943 |
| 5 | Brady Kelly | See Remarks | — | $735.47 |
Transactions 27
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-08-18 17:27 | 2026-08-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | M - OptEx | — | +722 | 12.8K | +6% | — |
| DT | 2026-08-18 17:27 | 2026-08-17 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | S - Sale+OE | $4.55 | -263 | 12.5K | -2% | -$1,197 |
| DT | 2026-05-19 16:05 | 2026-05-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | M - OptEx | — | +722 | 12.3K | +6% | — |
| DT | 2026-05-19 16:05 | 2026-05-18 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | S - Sale+OE | $7.53 | -259 | 12.0K | -2% | -$1,950 |
| DT | 2026-02-18 | 2026-02-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | M - OptEx | — | +723 | 11.8K | +7% | — |
| DT | 2026-02-18 | 2026-02-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | S - Sale+OE | $8.47 | -259 | 11.6K | -2% | -$2,194 |
| DT | 2025-11-18 | 2025-11-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | S - Sale+OE | $17.30 | -217 | 11.1K | -2% | -$3,754 |
| DMT | 2025-11-18 | 2025-11-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | M - OptEx | — | +721 | 11.0K | +7% | — |
| DT | 2025-08-19 | 2025-08-18 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | S - Sale+OE | $16.65 | -217 | 10.6K | -2% | -$3,613 |
| DMT | 2025-08-19 | 2025-08-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | Dir | M - OptEx | — | +724 | 10.5K | +7% | — |
| DT | 2025-05-19 | 2025-05-16 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $7.28 | -220 | 10.1K | -2% | -$1,602 |
| DMT | 2025-05-19 | 2025-05-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | — | +721 | 10.3K | +8% | — |
| DMT | 2025-02-19 | 2025-02-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | — | +34.4K | 204.8K | +20% | — |
| DT | 2025-02-19 | 2025-02-18 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $0.81 | -12.7K | 192.0K | -6% | -$10.3K |
| DT | 2024-11-19 | 2024-11-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | — | +7,812 | 172.9K | +5% | — |
| DT | 2024-11-19 | 2024-11-18 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $0.54 | -2,505 | 170.4K | -1% | -$1,353 |
| DT | 2024-10-29 | 2024-10-28 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $0.69 | -8,748 | 165.1K | -5% | -$6,036 |
| DT | 2024-10-29 | 2024-10-27 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | $0.00 | +27.8K | 173.8K | +19% | $0 |
| DT | 2024-08-19 | 2024-08-16 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $0.84 | -2,518 | 146.0K | -2% | -$2,115 |
| DT | 2024-08-19 | 2024-08-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | — | +7,813 | 148.5K | +6% | — |
| DT | 2024-05-17 | 2024-05-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | — | +7,812 | 143.1K | +6% | — |
| DT | 2024-05-17 | 2024-05-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $0.94 | -2,435 | 140.7K | -2% | -$2,289 |
| DT | 2024-02-16 | 2024-02-16 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $1.08 | -11.5K | 135.3K | -8% | -$12.5K |
| DT | 2024-02-16 | 2024-02-15 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | — | +31.2K | 146.9K | +27% | — |
| D | 2023-10-31 | 2023-10-27 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | M - OptEx | $0.00 | +27.8K | 124.2K | +29% | $0 |
| D | 2023-10-31 | 2023-10-30 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | S - Sale+OE | $1.35 | -8,552 | 115.6K | -7% | -$11.5K |
| 2022-07-06 | 2022-07-05 | MCRB | Seres Therapeutics, Inc. | Shaff Eric D. | CEO, Pres, Dir | A - Grant | $3.15 | +63.5K | 96.3K | +193% | +$200.0K |
Purchase Sale Sale after option exercise All abbreviations