There have been 50 recent insider transactions recorded for Seres Therapeutics, Inc. (MCRB), including 17 buys and 31 sells. Total insider buying was valued at $3.73M and total insider selling at $32.98K.
Notable insiders with recent activity include Kender Richard N, Desrosier Thomas, Henn Matthew R. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — MCRB
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-04 |
Kender Richard N |
See Remarks |
RSU Award |
150,000 |
$9.13 |
$1.37M |
150,000 |
| 2026-03-04 |
Desrosier Thomas |
See Remarks |
RSU Award |
22,500 |
$9.13 |
$205.43K |
22,500 |
| 2026-03-04 |
Henn Matthew R |
See Remarks |
RSU Award |
75,000 |
$9.13 |
$684.75K |
75,000 |
| 2026-03-04 |
Thorell Marella |
See Remarks |
RSU Award |
22,500 |
$9.13 |
$205.43K |
22,500 |
| 2026-03-04 |
Brady Kelly |
See Remarks |
RSU Award |
56,250 |
$9.13 |
$513.56K |
56,250 |
| 2026-03-02 |
Brady Kelly |
See Remarks |
Unknown |
730 |
- |
- |
- |
| 2026-02-15 |
Desrosier Thomas |
See Remarks |
Option Exercise (Sell) |
133 |
- |
- |
531 |
| 2026-02-15 |
Shaff Eric D. |
Director |
Option Exercise (Sell) |
391 |
- |
- |
1,564 |
| 2026-02-15 |
Henn Matthew R |
See Remarks |
Option Exercise (Sell) |
141 |
- |
- |
563 |
| 2026-02-15 |
Young Teresa L. |
See Remarks |
Option Exercise (Sell) |
133 |
- |
- |
531 |
| 2025-11-15 |
Desrosier Thomas |
See Remarks |
Option Exercise (Sell) |
132 |
- |
- |
664 |
| 2025-11-15 |
Shaff Eric D. |
Director |
Option Exercise (Sell) |
390 |
- |
- |
1,954 |
| 2025-11-15 |
Henn Matthew R |
See Remarks |
Option Exercise (Sell) |
3,998 |
- |
- |
- |
| 2025-11-15 |
Young Teresa L. |
See Remarks |
Option Exercise (Sell) |
3,998 |
- |
- |
- |
| 2025-09-26 |
Henn Matthew R |
See Remarks |
RSU Award |
3,998 |
- |
- |
3,998 |
| 2025-09-26 |
Young Teresa L. |
See Remarks |
RSU Award |
3,998 |
- |
- |
3,998 |
| 2025-08-18 |
Desrosier Thomas |
See Remarks |
Informative Sell |
76 |
$16.65 |
$1.27K |
7,455 |
| 2025-08-18 |
Shaff Eric D. |
Director |
Informative Sell |
217 |
$16.65 |
$3.61K |
10,609 |
| 2025-08-18 |
Henn Matthew R |
See Remarks |
Informative Sell |
73 |
$16.65 |
$1.22K |
4,548 |
| 2025-08-18 |
Young Teresa L. |
See Remarks |
Informative Sell |
59 |
$16.65 |
$982.35 |
5,215 |
| 2025-08-15 |
Desrosier Thomas |
See Remarks |
Option Exercise (Sell) |
133 |
- |
- |
796 |
| 2025-08-15 |
Shaff Eric D. |
Director |
Option Exercise (Sell) |
391 |
- |
- |
2,344 |
| 2025-08-15 |
Henn Matthew R |
See Remarks |
Option Exercise (Sell) |
141 |
- |
- |
844 |
| 2025-08-15 |
Young Teresa L. |
See Remarks |
Option Exercise (Sell) |
133 |
- |
- |
796 |
| 2025-08-05 |
Rosiello Robert L. |
Officer |
Unknown |
- |
- |
- |
- |
| 2025-08-05 |
Rosiello Robert L. |
Director |
RSU Award |
10,000 |
$14.28 |
$142.8K |
10,000 |
| 2025-07-01 |
Ausiello Dennis A |
Director |
RSU Award |
6,452 |
$10.71 |
$69.1K |
6,452 |
| 2025-07-01 |
Fraser Claire |
Director |
RSU Award |
6,452 |
$10.71 |
$69.1K |
6,452 |
| 2025-07-01 |
Berenson Stephen |
Director |
RSU Award |
11,470 |
$10.71 |
$122.84K |
11,470 |
| 2025-05-16 |
Shaff Eric D. |
CEO and President |
Informative Sell |
220 |
$7.28 |
$1.6K |
10,102 |
| 2025-05-16 |
Henn Matthew R |
See Remarks |
Informative Sell |
77 |
$7.28 |
$560.56 |
4,383 |
| 2025-05-16 |
Young Teresa L. |
See Remarks |
Informative Sell |
63 |
$7.28 |
$458.64 |
5,044 |
| 2025-05-15 |
Desrosier Thomas |
Chief Legal Officer and EVP |
Option Exercise (Sell) |
133 |
- |
- |
929 |
| 2025-05-15 |
Shaff Eric D. |
CEO and President |
Option Exercise (Sell) |
390 |
- |
- |
2,735 |
| 2025-05-15 |
Henn Matthew R |
See Remarks |
Option Exercise (Sell) |
140 |
- |
- |
985 |
| 2025-05-15 |
Young Teresa L. |
See Remarks |
Option Exercise (Sell) |
133 |
- |
- |
929 |
| 2025-04-10 |
Kender Richard N |
Director |
RSU Award |
100,000 |
$0.58 |
$58K |
100,000 |
| 2025-04-10 |
Ausiello Dennis A |
Director |
RSU Award |
100,000 |
$0.58 |
$58K |
100,000 |
| 2025-04-10 |
Fraser Claire |
Director |
RSU Award |
100,000 |
$0.58 |
$58K |
100,000 |
| 2025-04-10 |
Graves Kurt |
Director |
RSU Award |
100,000 |
$0.58 |
$58K |
100,000 |
| 2025-04-10 |
Biondi Paul |
Director |
RSU Award |
100,000 |
$0.58 |
$58K |
100,000 |
| 2025-04-10 |
Berenson Stephen |
Director |
RSU Award |
100,000 |
$0.58 |
$58K |
100,000 |
| 2025-02-18 |
Desrosier Thomas |
Chief Legal Officer and EVP |
Informative Sell |
4,300 |
$0.81 |
$3.49K |
142,456 |
| 2025-02-18 |
Shaff Eric D. |
CEO and President |
Informative Sell |
12,726 |
$0.81 |
$10.31K |
192,039 |
| 2025-02-18 |
Henn Matthew R. |
See Remarks |
Informative Sell |
3,953 |
$0.81 |
$3.2K |
84,443 |
| 2025-02-18 |
Von Moltke Lisa |
See Remarks |
Informative Sell |
4,416 |
$0.81 |
$3.58K |
39,875 |
| 2025-02-18 |
Young Teresa L. |
See Remarks |
Informative Sell |
3,338 |
$0.81 |
$2.7K |
97,536 |
| 2025-02-15 |
Desrosier Thomas |
Chief Legal Officer and EVP |
Option Exercise (Sell) |
2,657 |
- |
- |
21,250 |
| 2025-02-15 |
Shaff Eric D. |
CEO and President |
Option Exercise (Sell) |
7,813 |
- |
- |
62,500 |
| 2025-02-15 |
Henn Matthew R. |
See Remarks |
Option Exercise (Sell) |
2,813 |
- |
- |
22,500 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
