InsiderTrades

Shaff Eric D.

SEC CIK 1643734 · EDGAR

Buying vs selling by month open-market trades, last 36 months, MCRB
BoughtSold

Companies

TickerCompanyTitleHoldingBoughtSoldTradesFirstLast
MCRBSeres Therapeutics, Inc.Dir 12.5K — $60.4K 272022-07-052026-08-17

Most active insiders at MCRB, 12 months

#InsiderTitleBoughtSold
1 Henn Matthew RSee Remarks —$23.4K
2 Young Teresa L.See Remarks —$18.7K
3 Shaff Eric D.Dir —$9,095
4 DesRosier ThomasSee Remarks —$2,943
5 Brady KellySee Remarks —$735.47

Transactions 27

Type
Reset
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