Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Seres Therapeutics, Inc. (MCRB) since 2016 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Seres Therapeutics, Inc.. Table 2 shows the detailed insider transactions. This company's CIK number is 1609809.
Total stock buying since 2016: $47,525,463.
Total stock sales since 2016: $56,373,093.
Total stock option exercises since 2016: $2,066,514.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 29,597 | $33,561 | 81,782 | $0 |
| 2024 | 0 | $0 | 105,235 | $98,330 | 324,841 | $0 |
| 2023 | 0 | $0 | 41,807 | $83,463 | 113,056 | $0 |
| 2022 | 8,738,243 | $27,525,465 | 5,012 | $39,745 | 0 | $0 |
| 2020 | 0 | $0 | 91,812 | $2,523,636 | 144,812 | $441,919 |
| 2019 | 8,888,888 | $19,999,998 | 13,249 | $69,963 | 54,000 | $0 |
| 2018 | 0 | $0 | 365,318 | $3,167,431 | 204,646 | $109,440 |
| 2017 | 0 | $0 | 1,623 | $16,457 | 105,604 | $71,428 |
| 2016 | 0 | $0 | 1,776,556 | $50,340,507 | 952,556 | $1,443,727 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-08 | 0 | $0 | 425 | $7,075 | 1,436 | $0 |
| 2025-05 | 0 | $0 | 439 | $3,194 | 1,434 | $0 |
| 2025-02 | 0 | $0 | 28,733 | $23,292 | 78,912 | $0 |
| 2024-11 | 0 | $0 | 6,022 | $3,255 | 18,905 | $0 |
| 2024-10 | 0 | $0 | 24,308 | $16,770 | 79,063 | $0 |
| 2024-08 | 0 | $0 | 31,623 | $32,534 | 106,876 | $0 |
| 2024-05 | 0 | $0 | 6,901 | $6,483 | 21,872 | $0 |
| 2024-02 | 0 | $0 | 36,381 | $39,288 | 98,125 | $0 |
| 2023-10 | 0 | $0 | 34,769 | $46,936 | 113,056 | $0 |
| 2023-04 | 0 | $0 | 7,038 | $36,527 | 0 | $0 |
| 2022-10 | 0 | $0 | 5,012 | $39,745 | 0 | $0 |
| 2022-07 | 8,738,243 | $27,525,465 | 0 | $0 | 0 | $0 |
| 2020-12 | 0 | $0 | 91,812 | $2,523,636 | 79,812 | $441,919 |
| 2020-01 | 0 | $0 | 0 | $0 | 65,000 | $0 |
| 2019-11 | 0 | $0 | 3,400 | $13,297 | 12,000 | $0 |
| 2019-06 | 8,888,888 | $19,999,998 | 0 | $0 | 0 | $0 |
| 2019-01 | 0 | $0 | 9,849 | $56,666 | 42,000 | $0 |
| 2018-12 | 0 | $0 | 14,282 | $91,319 | 10,000 | $0 |
| 2018-11 | 0 | $0 | 14,279 | $117,915 | 0 | $0 |
| 2018-10 | 0 | $0 | 14,279 | $84,802 | 0 | $0 |
| 2018-09 | 0 | $0 | 28,607 | $234,118 | 0 | $0 |
| 2018-08 | 0 | $0 | 14,279 | $108,063 | 0 | $0 |
| 2018-07 | 0 | $0 | 47,625 | $419,897 | 33,346 | $23,674 |
| 2018-06 | 0 | $0 | 190,838 | $1,749,593 | 85,559 | $57,195 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-08-18 | Young Teresa L. (See Remarks) | Sale | 59 | 16.65 | 982 |
| 2025-08-18 | Henn Matthew R (See Remarks) | Sale | 73 | 16.65 | 1,215 |
| 2025-08-18 | Shaff Eric D. | Sale | 217 | 16.65 | 3,613 |
| 2025-08-18 | Desrosier Thomas (See Remarks) | Sale | 76 | 16.65 | 1,265 |
| 2025-08-15 | Young Teresa L. (See Remarks) | Option Ex | 230 | .00 | 0 |
| 2025-08-15 | Henn Matthew R (See Remarks) | Option Ex | 238 | .00 | 0 |
| 2025-08-15 | Shaff Eric D. | Option Ex | 724 | .00 | 0 |
| 2025-08-15 | Desrosier Thomas (See Remarks) | Option Ex | 244 | .00 | 0 |
| 2025-05-16 | Young Teresa L. (See Remarks) | Sale | 63 | 7.28 | 458 |
| 2025-05-16 | Henn Matthew R (See Remarks) | Sale | 77 | 7.28 | 560 |
| 2025-05-16 | Shaff Eric D. (CEO and President) | Sale | 220 | 7.28 | 1,601 |
| 2025-05-15 | Young Teresa L. (See Remarks) | Option Ex | 231 | .00 | 0 |
| 2025-05-15 | Henn Matthew R (See Remarks) | Option Ex | 238 | .00 | 0 |
| 2025-05-15 | Shaff Eric D. (CEO and President) | Option Ex | 721 | .00 | 0 |
| 2025-05-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 79 | 7.28 | 575 |
| 2025-05-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 244 | .00 | 0 |
| 2025-02-18 | Young Teresa L. (See Remarks) | Sale | 3,338 | .81 | 2,703 |
| 2025-02-18 | Von Moltke Lisa (See Remarks) | Sale | 4,416 | .81 | 3,581 |
| 2025-02-18 | Henn Matthew R. (See Remarks) | Sale | 3,953 | .81 | 3,201 |
| 2025-02-18 | Shaff Eric D. (CEO and President) | Sale | 12,726 | .81 | 10,320 |
| 2025-02-18 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 4,300 | .81 | 3,487 |
| 2025-02-15 | Young Teresa L. (See Remarks) | Option Ex | 10,470 | .00 | 0 |
| 2025-02-15 | Von Moltke Lisa (See Remarks) | Option Ex | 11,876 | .00 | 0 |
| 2025-02-15 | Henn Matthew R. (See Remarks) | Option Ex | 10,626 | .00 | 0 |
| 2025-02-15 | Shaff Eric D. (CEO and President) | Option Ex | 34,376 | .00 | 0 |
| 2025-02-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 11,564 | .00 | 0 |
| 2024-11-18 | Young Teresa L. (See Remarks) | Sale | 735 | .54 | 397 |
| 2024-11-18 | Von Moltke Lisa (See Remarks) | Sale | 977 | .54 | 528 |
| 2024-11-18 | Henn Matthew R. (See Remarks) | Sale | 927 | .54 | 501 |
| 2024-11-18 | Shaff Eric D. (CEO and President) | Sale | 2,505 | .54 | 1,355 |
| 2024-11-18 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 878 | .54 | 474 |
| 2024-11-15 | Young Teresa L. (See Remarks) | Option Ex | 2,656 | .00 | 0 |
| 2024-11-15 | Von Moltke Lisa (See Remarks) | Option Ex | 2,969 | .00 | 0 |
| 2024-11-15 | Henn Matthew R. (See Remarks) | Option Ex | 2,812 | .00 | 0 |
| 2024-11-15 | Shaff Eric D. (CEO and President) | Option Ex | 7,812 | .00 | 0 |
| 2024-11-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 2,656 | .00 | 0 |
| 2024-10-28 | Young Teresa L. (See Remarks) | Sale | 2,983 | .69 | 2,058 |
| 2024-10-28 | Von Moltke Lisa (See Remarks) | Sale | 4,334 | .69 | 2,990 |
| 2024-10-28 | Henn Matthew R. (See Remarks) | Sale | 3,984 | .69 | 2,748 |
| 2024-10-28 | Shaff Eric D. (CEO and President) | Sale | 8,748 | .69 | 6,036 |
| 2024-10-28 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 4,259 | .69 | 2,938 |
| 2024-10-27 | Young Teresa L. (See Remarks) | Option Ex | 11,360 | .00 | 0 |
| 2024-10-27 | Von Moltke Lisa (See Remarks) | Option Ex | 13,744 | .00 | 0 |
| 2024-10-27 | Henn Matthew R. (See Remarks) | Option Ex | 12,622 | .00 | 0 |
| 2024-10-27 | Shaff Eric D. (CEO and President) | Option Ex | 27,837 | .00 | 0 |
| 2024-10-27 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 13,500 | .00 | 0 |
| 2024-08-16 | Ege David S. (See Remarks) | Sale | 1,128 | .84 | 947 |
| 2024-08-16 | Young Teresa L. (See Remarks) | Sale | 728 | .84 | 611 |
| 2024-08-16 | Von Moltke Lisa (See Remarks) | Sale | 973 | .84 | 817 |
| 2024-08-16 | Henn Matthew R. (See Remarks) | Sale | 923 | .84 | 775 |
| 2024-08-16 | Shaff Eric D. (CEO and President) | Sale | 2,518 | .84 | 2,115 |
| 2024-08-16 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 873 | .84 | 733 |
| 2024-08-15 | Ege David S. (See Remarks) | Option Ex | 2,969 | .00 | 0 |
| 2024-08-15 | Young Teresa L. (See Remarks) | Option Ex | 2,656 | .00 | 0 |
| 2024-08-15 | Von Moltke Lisa (See Remarks) | Option Ex | 2,969 | .00 | 0 |
| 2024-08-15 | Henn Matthew R. (See Remarks) | Option Ex | 2,813 | .00 | 0 |
| 2024-08-15 | Shaff Eric D. (CEO and President) | Option Ex | 7,813 | .00 | 0 |
| 2024-08-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 2,656 | .00 | 0 |
| 2024-08-05 | Young Teresa L. (See Remarks) | Sale | 24,480 | 1.08 | 26,536 |
| 2024-08-03 | Young Teresa L. (See Remarks) | Option Ex | 85,000 | .00 | 0 |
| 2024-05-15 | Ege David S. (See Remarks) | Sale | 1,090 | .94 | 1,024 |
| 2024-05-15 | Ege David S. (See Remarks) | Option Ex | 2,968 | .00 | 0 |
| 2024-05-15 | Young Teresa L. (See Remarks) | Sale | 703 | .94 | 660 |
| 2024-05-15 | Young Teresa L. (See Remarks) | Option Ex | 2,656 | .00 | 0 |
| 2024-05-15 | Von Moltke Lisa (See Remarks) | Sale | 939 | .94 | 882 |
| 2024-05-15 | Von Moltke Lisa (See Remarks) | Option Ex | 2,968 | .00 | 0 |
| 2024-05-15 | Henn Matthew R. (See Remarks) | Sale | 891 | .94 | 837 |
| 2024-05-15 | Henn Matthew R. (See Remarks) | Option Ex | 2,812 | .00 | 0 |
| 2024-05-15 | Shaff Eric D. (CEO and President) | Sale | 2,435 | .94 | 2,288 |
| 2024-05-15 | Shaff Eric D. (CEO and President) | Option Ex | 7,812 | .00 | 0 |
| 2024-05-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 843 | .94 | 792 |
| 2024-05-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 2,656 | .00 | 0 |
| 2024-02-16 | Ege David S. (See Remarks) | Sale | 5,010 | 1.08 | 5,410 |
| 2024-02-16 | Young Teresa L. (See Remarks) | Sale | 3,374 | 1.08 | 3,643 |
| 2024-02-16 | Von Moltke Lisa (See Remarks) | Sale | 4,400 | 1.08 | 4,752 |
| 2024-02-16 | Henn Matthew R. (See Remarks) | Sale | 4,170 | 1.08 | 4,503 |
| 2024-02-16 | Shaff Eric D. (CEO and President) | Sale | 11,549 | 1.08 | 12,472 |
| 2024-02-16 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 3,939 | 1.08 | 4,254 |
| 2024-02-16 | Arkowitz David (Chief Financial Officer) | Sale | 3,939 | 1.08 | 4,254 |
| 2024-02-15 | Ege David S. (See Remarks) | Option Ex | 11,875 | .00 | 0 |
| 2024-02-15 | Young Teresa L. (See Remarks) | Option Ex | 10,625 | .00 | 0 |
| 2024-02-15 | Von Moltke Lisa (See Remarks) | Option Ex | 11,875 | .00 | 0 |
| 2024-02-15 | Henn Matthew R. (See Remarks) | Option Ex | 11,250 | .00 | 0 |
| 2024-02-15 | Shaff Eric D. (CEO and President) | Option Ex | 31,250 | .00 | 0 |
| 2024-02-15 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 10,625 | .00 | 0 |
| 2024-02-15 | Arkowitz David (Chief Financial Officer) | Option Ex | 10,625 | .00 | 0 |
| 2023-10-30 | Ege David S. (See Remarks) | Sale | 4,066 | 1.35 | 5,489 |
| 2023-10-30 | Young Teresa L. (See Remarks) | Sale | 2,907 | 1.35 | 3,924 |
| 2023-10-30 | Von Moltke Lisa (See Remarks) | Sale | 4,232 | 1.35 | 5,713 |
| 2023-10-30 | Henn Matthew R. (See Remarks) | Sale | 3,886 | 1.35 | 5,246 |
| 2023-10-30 | Cloghessy Paula (See Remarks) | Sale | 2,904 | 1.35 | 3,920 |
| 2023-10-30 | Shaff Eric D. (CEO and President) | Sale | 8,552 | 1.35 | 11,545 |
| 2023-10-30 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 4,156 | 1.35 | 5,610 |
| 2023-10-30 | Arkowitz David (Chief Financial Officer) | Sale | 4,066 | 1.35 | 5,489 |
| 2023-10-27 | Ege David S. (See Remarks) | Option Ex | 11,361 | .00 | 0 |
| 2023-10-27 | Young Teresa L. (See Remarks) | Option Ex | 11,361 | .00 | 0 |
| 2023-10-27 | Von Moltke Lisa (See Remarks) | Option Ex | 13,745 | .00 | 0 |
| 2023-10-27 | Henn Matthew R. (See Remarks) | Option Ex | 12,623 | .00 | 0 |
| 2023-10-27 | Cloghessy Paula (See Remarks) | Option Ex | 9,418 | .00 | 0 |
| 2023-10-27 | Shaff Eric D. (CEO and President) | Option Ex | 27,838 | .00 | 0 |
| 2023-10-27 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 13,501 | .00 | 0 |
| 2023-10-27 | Arkowitz David (Chief Financial Officer) | Option Ex | 13,209 | .00 | 0 |
| 2023-04-28 | Ege David S. (See Remarks) | Sale | 7,038 | 5.19 | 36,527 |
| 2022-10-31 | Ege David S. (See Remarks) | Sale | 5,012 | 7.93 | 39,745 |
| 2022-07-05 | Afeyan Noubar (10% Owner) | Buy | 8,738,243 | 3.15 | 27,525,465 |
| 2020-12-01 | Henn Matthew R. (See Remarks) | Sale | 91,812 | 27.49 | 2,523,636 |
| 2020-12-01 | Henn Matthew R. (See Remarks) | Option Ex | 79,812 | 5.54 | 441,919 |
| 2020-01-26 | Henn Matthew R. (See Remarks) | Option Ex | 7,500 | .00 | 0 |
| 2020-01-26 | Aunins John G. (Chief Technology Officer & EVP) | Option Ex | 12,500 | .00 | 0 |
| 2020-01-26 | Shaff Eric D. (CEO and President) | Option Ex | 20,000 | .00 | 0 |
| 2020-01-26 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 25,000 | .00 | 0 |
| 2019-11-22 | Chapman Marcus (See Remarks) | Sale | 3,400 | 3.91 | 13,297 |
| 2019-11-01 | Chapman Marcus (See Remarks) | Option Ex | 12,000 | .00 | 0 |
| 2019-06-18 | Afeyan Noubar (Director) | Buy | 8,888,888 | 2.25 | 19,999,998 |
| 2019-01-28 | Shaff Eric D. (See Remarks) | Sale | 4,378 | 5.75 | 25,186 |
| 2019-01-28 | Desrosier Thomas (Chief Legal Officer and EVP) | Sale | 5,471 | 5.75 | 31,480 |
| 2019-01-26 | Aunins John G. (Chief Technology Officer) | Option Ex | 7,500 | .00 | 0 |
| 2019-01-26 | Shaff Eric D. (See Remarks) | Option Ex | 12,000 | .00 | 0 |
| 2019-01-26 | Desrosier Thomas (Chief Legal Officer and EVP) | Option Ex | 15,000 | .00 | 0 |
| 2019-01-26 | Cook David N (See Remarks) | Option Ex | 7,500 | .00 | 0 |
| 2018-12-19 | Aunins John G. (Chief Technology Officer & EVP) | Option Ex | 10,000 | .00 | 0 |
| 2018-12-17 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 14,282 | 6.39 | 91,319 |
| 2018-11-15 | Aunins John G. (See Remarks) | Sale | 14,279 | 8.26 | 117,915 |
| 2018-10-15 | Aunins John G. (See Remarks) | Sale | 14,279 | 5.94 | 84,802 |
| 2018-09-17 | Aunins John G. (See Remarks) | Sale | 14,279 | 7.28 | 103,879 |
| 2018-09-07 | Pomerantz Roger (President and CEO) | Sale | 1,810 | 9.00 | 16,291 |
| 2018-09-06 | Pomerantz Roger (President and CEO) | Sale | 3,013 | 9.04 | 27,234 |
| 2018-09-05 | Pomerantz Roger (President and CEO) | Sale | 9,505 | 9.12 | 86,714 |
| 2018-08-15 | Aunins John G. (See Remarks) | Sale | 14,279 | 7.57 | 108,063 |
| 2018-07-15 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 14,279 | 8.11 | 115,731 |
| 2018-07-11 | Pomerantz Roger (President and CEO) | Sale | 1,010 | 9.01 | 9,099 |
| 2018-07-11 | Pomerantz Roger (President and CEO) | Option Ex | 1,010 | .71 | 717 |
| 2018-07-10 | Pomerantz Roger (President and CEO) | Sale | 5,989 | 9.05 | 54,206 |
| 2018-07-10 | Pomerantz Roger (President and CEO) | Option Ex | 5,989 | .71 | 4,252 |
| 2018-07-09 | Pomerantz Roger (President and CEO) | Sale | 10,981 | 9.14 | 100,355 |
| 2018-07-09 | Pomerantz Roger (President and CEO) | Option Ex | 10,981 | .71 | 7,796 |
| 2018-07-06 | Pomerantz Roger (President and CEO) | Sale | 15,366 | 9.14 | 140,506 |
| 2018-07-06 | Pomerantz Roger (President and CEO) | Option Ex | 15,366 | .71 | 10,909 |
| 2018-06-29 | Pomerantz Roger (President and CEO) | Sale | 4,496 | 9.10 | 40,913 |
| 2018-06-29 | Pomerantz Roger (President and CEO) | Option Ex | 4,496 | .71 | 3,192 |
| 2018-06-28 | Pomerantz Roger (President and CEO) | Sale | 21,560 | 9.15 | 197,381 |
| 2018-06-28 | Pomerantz Roger (President and CEO) | Option Ex | 21,560 | .71 | 15,307 |
| 2018-06-27 | Pomerantz Roger (President and CEO) | Sale | 16,991 | 9.03 | 153,411 |
| 2018-06-27 | Pomerantz Roger (President and CEO) | Option Ex | 16,991 | .71 | 12,063 |
| 2018-06-26 | Pomerantz Roger (President and CEO) | Sale | 21,224 | 9.19 | 195,133 |
| 2018-06-26 | Pomerantz Roger (President and CEO) | Option Ex | 21,224 | .71 | 15,069 |
| 2018-06-25 | Pomerantz Roger (President and CEO) | Sale | 26,752 | 9.21 | 246,492 |
| 2018-06-25 | Pomerantz Roger (President and CEO) | Option Ex | 16,288 | .71 | 11,564 |
| 2018-06-22 | Pomerantz Roger (President and CEO) | Sale | 40,057 | 9.36 | 374,773 |
| 2018-06-21 | Pomerantz Roger (President and CEO) | Sale | 18,987 | 9.06 | 172,098 |
| 2018-06-20 | Pomerantz Roger (President and CEO) | Sale | 26,492 | 9.33 | 247,064 |
| 2018-06-19 | Aunins John G. (Chief Technology Officer & EVP) | Option Ex | 5,000 | .00 | 0 |
| 2018-06-15 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 14,279 | 8.57 | 122,328 |
| 2018-05-15 | Aunins John G. (See Remarks) | Sale | 14,279 | 8.08 | 115,402 |
| 2018-05-09 | Pomerantz Roger (President and CEO) | Sale | 233 | 9.00 | 2,097 |
| 2018-04-25 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 14,279 | 7.58 | 108,263 |
| 2018-01-26 | Aunins John G. (See Remarks) | Sale | 1,738 | 11.02 | 19,152 |
| 2018-01-26 | Aunins John G. (See Remarks) | Option Ex | 5,000 | .00 | 0 |
| 2018-01-26 | Trucksis Michele (See Remarks) | Sale | 2,607 | 11.02 | 28,729 |
| 2018-01-26 | Trucksis Michele (See Remarks) | Option Ex | 7,500 | .00 | 0 |
| 2018-01-26 | Shaff Eric D. (See Remarks) | Sale | 2,780 | 11.02 | 30,635 |
| 2018-01-26 | Shaff Eric D. (See Remarks) | Option Ex | 8,000 | .00 | 0 |
| 2018-01-26 | Desrosier Thomas (See Remarks) | Sale | 3,475 | 11.02 | 38,294 |
| 2018-01-26 | Desrosier Thomas (See Remarks) | Option Ex | 10,000 | .00 | 0 |
| 2018-01-26 | Cook David N (See Remarks) | Sale | 1,738 | 11.02 | 19,152 |
| 2018-01-26 | Cook David N (See Remarks) | Option Ex | 5,000 | .00 | 0 |
| 2018-01-24 | Pomerantz Roger (President and CEO) | Option Ex | 40,241 | .71 | 28,571 |
| 2017-12-19 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 1,623 | 10.14 | 16,457 |
| 2017-12-19 | Aunins John G. (Chief Technology Officer & EVP) | Option Ex | 5,000 | .00 | 0 |
| 2017-07-18 | Pomerantz Roger (President and CEO) | Option Ex | 100,604 | .71 | 71,428 |
| 2016-08-29 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 9,390 | 10.87 | 102,069 |
| 2016-07-28 | Trucksis Michele (Chief Medical Officer and EVP) | Sale | 4,156 | 35.18 | 146,208 |
| 2016-07-28 | Trucksis Michele (Chief Medical Officer and EVP) | Option Ex | 4,156 | 15.77 | 65,540 |
| 2016-07-27 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 9,250 | 35.00 | 323,750 |
| 2016-07-27 | Trucksis Michele (Chief Medical Officer and EVP) | Sale | 38,064 | 35.14 | 1,337,530 |
| 2016-07-27 | Trucksis Michele (Chief Medical Officer and EVP) | Option Ex | 38,064 | 15.77 | 600,269 |
| 2016-07-27 | Pomerantz Roger (President and CEO) | Sale | 20,000 | 35.00 | 700,000 |
| 2016-07-27 | Pomerantz Roger (President and CEO) | Option Ex | 20,000 | .71 | 14,200 |
| 2016-07-25 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 9,390 | 34.18 | 320,950 |
| 2016-07-22 | Aunins John G. (Chief Technology Officer & EVP) | Option Ex | 187,500 | .48 | 90,000 |
| 2016-07-06 | Pomerantz Roger (President and CEO) | Sale | 35,435 | 29.54 | 1,046,572 |
| 2016-07-06 | Pomerantz Roger (President and CEO) | Option Ex | 35,435 | .71 | 25,158 |
| 2016-07-05 | Pomerantz Roger (President and CEO) | Sale | 52,776 | 29.61 | 1,562,961 |
| 2016-07-05 | Pomerantz Roger (President and CEO) | Option Ex | 52,776 | .71 | 37,470 |
| 2016-07-01 | Pomerantz Roger (President and CEO) | Sale | 56,789 | 29.65 | 1,683,964 |
| 2016-07-01 | Pomerantz Roger (President and CEO) | Option Ex | 56,789 | .71 | 40,320 |
| 2016-06-30 | Shaff Eric D. (CFO and EVP) | Sale | 4,533 | 29.54 | 133,904 |
| 2016-06-30 | Shaff Eric D. (CFO and EVP) | Option Ex | 4,533 | 7.79 | 35,312 |
| 2016-06-28 | Shaff Eric D. (CFO and EVP) | Sale | 1,667 | 28.85 | 48,092 |
| 2016-06-28 | Shaff Eric D. (CFO and EVP) | Option Ex | 1,667 | 7.79 | 12,985 |
| 2016-06-27 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 9,390 | 27.23 | 255,689 |
| 2016-06-27 | Shaff Eric D. (CFO and EVP) | Sale | 3,334 | 28.00 | 93,352 |
| 2016-06-27 | Shaff Eric D. (CFO and EVP) | Option Ex | 3,334 | 7.79 | 25,971 |
| 2016-06-02 | Pomerantz Roger (President and CEO) | Sale | 74,049 | 32.39 | 2,398,743 |
| 2016-06-02 | Pomerantz Roger (President and CEO) | Option Ex | 74,049 | .71 | 52,574 |
| 2016-06-02 | Cook David N (Chief Scientific Officer & EVP) | Sale | 8,000 | 31.00 | 248,000 |
| 2016-06-01 | Pomerantz Roger (President and CEO) | Sale | 70,951 | 30.39 | 2,155,846 |
| 2016-06-01 | Pomerantz Roger (President and CEO) | Option Ex | 70,951 | .71 | 50,375 |
| 2016-06-01 | Cook David N (Chief Scientific Officer & EVP) | Sale | 16,000 | 29.43 | 470,880 |
| 2016-05-31 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 14,015 | 30.30 | 424,584 |
| 2016-05-25 | Kania Edwin M Jr (10% Owner) | Sale | 1,000,000 | 27.60 | 27,600,000 |
| 2016-05-24 | Pomerantz Roger (President and CEO) | Sale | 9,801 | 30.00 | 294,030 |
| 2016-05-24 | Pomerantz Roger (President and CEO) | Option Ex | 9,801 | .71 | 6,958 |
| 2016-05-18 | Pomerantz Roger (President and CEO) | Option Ex | 160,965 | .71 | 114,285 |
| 2016-05-06 | Pomerantz Roger (President and CEO) | Sale | 8,507 | 24.69 | 210,037 |
| 2016-05-06 | Pomerantz Roger (President and CEO) | Option Ex | 8,507 | .71 | 6,039 |
| 2016-05-05 | Pomerantz Roger (President and CEO) | Sale | 30,027 | 25.91 | 777,999 |
| 2016-05-05 | Pomerantz Roger (President and CEO) | Option Ex | 30,027 | .71 | 21,319 |
| 2016-05-04 | Pomerantz Roger (President and CEO) | Sale | 29,298 | 26.91 | 788,555 |
| 2016-05-04 | Pomerantz Roger (President and CEO) | Option Ex | 29,298 | .71 | 20,801 |
| 2016-04-25 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 18,640 | 31.94 | 595,361 |
| 2016-04-07 | Pomerantz Roger (President and CEO) | Sale | 9,212 | 30.00 | 276,360 |
| 2016-04-07 | Pomerantz Roger (President and CEO) | Option Ex | 9,212 | .59 | 5,481 |
| 2016-04-07 | Cook David N (Chief Scientific Officer & EVP) | Sale | 8,000 | 31.00 | 248,000 |
| 2016-04-04 | Shaff Eric D. (CFO and EVP) | Sale | 6,568 | 28.85 | 189,486 |
| 2016-04-04 | Shaff Eric D. (CFO and EVP) | Option Ex | 6,568 | 7.79 | 51,164 |
| 2016-04-04 | Pomerantz Roger (President and CEO) | Sale | 44,825 | 29.26 | 1,311,489 |
| 2016-04-04 | Pomerantz Roger (President and CEO) | Option Ex | 44,825 | .48 | 21,516 |
| 2016-04-04 | Cook David N (Chief Scientific Officer & EVP) | Sale | 8,000 | 28.00 | 224,000 |
| 2016-04-01 | Pomerantz Roger (President and CEO) | Sale | 90,963 | 26.64 | 2,423,254 |
| 2016-04-01 | Pomerantz Roger (President and CEO) | Option Ex | 90,963 | .48 | 43,662 |
| 2016-04-01 | Cook David N (Chief Scientific Officer & EVP) | Sale | 53,000 | 26.32 | 1,394,960 |
| 2016-03-31 | Shaff Eric D. (CFO and EVP) | Sale | 7,663 | 25.82 | 197,820 |
| 2016-03-31 | Shaff Eric D. (CFO and EVP) | Option Ex | 7,663 | 7.79 | 59,694 |
| 2016-03-28 | Aunins John G. (Chief Technology Officer & EVP) | Sale | 9,390 | 23.89 | 224,327 |
| 2016-03-28 | Shaff Eric D. (CFO and EVP) | Sale | 5,473 | 24.07 | 131,735 |
| 2016-03-28 | Shaff Eric D. (CFO and EVP) | Option Ex | 5,473 | 7.79 | 42,634 |
Insider trading activities including stock purchases, stock sales, and option exercises of MCRB listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Seres Therapeutics, Inc. (symbol MCRB, CIK number 1609809) see the Securities and Exchange Commission (SEC) website.