MCRB Seres Therapeutics, Inc.
Seres Therapeutics, Inc. (MCRB) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 92% planned / 8% discretionary
Largest single sale: $2.0K.
Where they traded
No open-market insider purchase on record.
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Shaff Eric D. | Director | Sell 10b5-1 | 263 | $4.55 | $1.2K | 12,499 −2.1% of holding | |
| DesRosier Thomas | See Remarks | Sell 10b5-1 | 82 | $4.55 | $373 | 8,117 −1% of holding | |
| Henn Matthew R | See Remarks | Sell 10b5-1 | 81 | $4.55 | $369 | 7,995 −1% of holding | |
| Brady Kelly | See Remarks | Sell 10b5-1 | 64 | $4.55 | $291 | 8,679 −0.7% of holding | |
| Shaff Eric D. | Director | Sell 10b5-1 | 259 | $7.53 | $2.0K | 12,040 −2.1% of holding | |
| DesRosier Thomas | See Remarks | Sell 10b5-1 | 79 | $7.53 | $595 | 7,954 −1% of holding | |
| Henn Matthew R | See Remarks | Sell 10b5-1 | 77 | $7.53 | $580 | 7,838 −1% of holding | |
| Brady Kelly | See Remarks | Sell | 59 | $7.53 | $444 | 8,562 −0.7% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.