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MCRB Exercise Disclosure
Shaff Eric D. · SEC Form 4 · Filed Aug 18, 2026
Exercise
Reported value range
Not reported
Shaff Eric D. Director
MCRB
Seres Therapeutics
MCRB
Transaction date
Aug 15, 2026
Public filing date
Aug 18, 2026
Filing lag
Filed 3 days later
MCRB daily price context
Close on/before transaction
$4.54
Aug 14, 2026
First close after public filing
$4.68
Aug 19, 2026
30-day return after filing
-12.39%
Through Sep 17, 2026
Source details
- Reported owner
- Not disclosed
- Source asset code
- Security
- Security
- Common Stock
- Quantity / price
- 722 shares
- SEC ownership
- Direct
- Transaction code
- M
- Form
- 4
- Filing identifier
- 0001193125-26-355722
Filing cohort
Transactions in this filing
Showing 4 of 4
Trades
4
Issuers
1
Estimated value
$1.2K
Buys / sales
0 / 1
| Issuer | Transaction | Traded | Value |
|---|---|---|---|
| Seres Therapeutics, Inc. MCRB | Sale | Aug 17, 2026 | $1.2K |
| Seres Therapeutics, Inc. MCRB | Exercise | Aug 15, 2026 | $0 |
| Seres Therapeutics, Inc. MCRB Current | Exercise | Aug 15, 2026 | Not reported |
| Seres Therapeutics, Inc. MCRB | Exercise | Aug 15, 2026 | $0 |