Seres Therapeutics Inc (MCRB)

Seres Therapeutics Inc. insiders executed four transactions totaling $2,229.50 over the past ninety days, all involving planned sales. These divestments occurred following the company's recent results financiers, amidst a significant 40.9% decline in stock value. No purchase activity was recorded during this period.
Ticker: MCRB Exchange: NSM


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Purchase Sale Planned purchase Planned sale Net purchase Net sale Buy signal Sell signal Earnings
No insider activity signals detected

Insider trades have not triggered unusual activity signals for this company.

Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Brady Kelly See Remarks Officer
Transaction date
Planned sale
Price
283.97
Quantity 67,548 +7.0%
Value US$3,969,324
1.6
Shaff Eric D. Non-Executive Director
Transaction date
Planned sale
Price
131.36
Quantity 27,688 -1.9%
Value US$467,233
Henn Matthew R See Remarks Officer
Transaction date
Planned sale
Price
147.46
Quantity 93,505 -4.9%
Value US$22,688
1.6
DesRosier Thomas See Remarks Officer
Transaction date
Planned sale
Price
4.55
Quantity 1,000 -1.0%
Value US$100,000
TERESA L YOUNG Officer Officer
Transaction date
Proposed sale
Price
7.69
Quantity 167
Value US$1,284
Brady Kelly See Remarks Officer
Transaction date
Sale
Price
7.53
Quantity 59 -0.7%
Value US$444
1.6
DesRosier Thomas See Remarks Officer
Transaction date
Planned sale
Price
7.53
Quantity 79 -1.0%
Value US$595
1.6
Shaff Eric D. Non-Executive Director
Transaction date
Planned sale
Price
7.53
Quantity 259 -2.1%
Value US$1,950
Henn Matthew R See Remarks Officer
Transaction date
Planned sale
Price
7.53
Quantity 77 -1.0%
Value US$580
TERESA L YOUNG Officer Officer
Transaction date
Proposed sale
Price
9.12
Quantity 8,553
Value US$77,967
1.6
DesRosier Thomas See Remarks Officer
Transaction date
Planned sale
Price
8.47
Quantity 78 -1.0%
Value US$661
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
8.47
Quantity 75 -0.9%
Value US$635
Henn Matthew R See Remarks Officer
Transaction date
Planned sale
Price
8.47
Quantity 89 -1.1%
Value US$754
1.6
Shaff Eric D. Non-Executive Director
Transaction date
Planned sale
Price
8.47
Quantity 259 -2.2%
Value US$2,194
1.6
DesRosier Thomas See Remarks Officer
Transaction date
Planned sale
Price
17.30
Quantity 76 -1.0%
Value US$1,315
Henn Matthew R See Remarks Officer
Transaction date
Planned sale
Price
17.30
Quantity 1,257 -14.3%
Value US$21,746
1.6
Shaff Eric D. Non-Executive Director
Transaction date
Planned sale
Price
17.30
Quantity 217 -1.9%
Value US$3,754
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
17.30
Quantity 1,042 -11.0%
Value US$18,027
1.6
Shaff Eric D. Non-Executive Director
Transaction date
Planned sale
Price
16.65
Quantity 217 -2.0%
Value US$3,613
1.6
DesRosier Thomas See Remarks Officer
Transaction date
Planned sale
Price
16.65
Quantity 76 -1.0%
Value US$1,265
Henn Matthew R See Remarks Officer
Transaction date
Planned sale
Price
16.65
Quantity 73 -1.6%
Value US$1,215
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
16.65
Quantity 59 -1.1%
Value US$982
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
7.28
Quantity 220 -2.1%
Value US$1,602
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
7.28
Quantity 63 -1.2%
Value US$459
Henn Matthew R See Remarks Officer
Transaction date
Planned sale
Price
7.28
Quantity 77 -1.7%
Value US$561
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
7.28
Quantity 79 -1.1%
Value US$575
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
0.81
Quantity 3,338 -3.3%
Value US$2,704
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
0.81
Quantity 3,953 -4.5%
Value US$3,204
von Moltke Lisa See Remarks Officer
Transaction date
Planned sale
Price
0.81
Quantity 4,416 -10.0%
Value US$3,579
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
0.81
Quantity 12,726 -6.2%
Value US$10,314
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
0.81
Quantity 4,300 -2.9%
Value US$3,485
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
0.54
Quantity 878 -0.6%
Value US$475
von Moltke Lisa See Remarks Officer
Transaction date
Planned sale
Price
0.54
Quantity 977 -2.9%
Value US$528
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
0.54
Quantity 927 -1.2%
Value US$501
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
0.54
Quantity 735 -0.8%
Value US$398
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
0.54
Quantity 2,505 -1.4%
Value US$1,355
von Moltke Lisa See Remarks Officer
Transaction date
Planned sale
Price
0.69
Quantity 4,334 -12.5%
Value US$2,991
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
0.69
Quantity 2,983 -3.3%
Value US$2,059
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
0.69
Quantity 4,259 -3.1%
Value US$2,939
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
0.69
Quantity 3,984 -5.0%
Value US$2,749
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
0.69
Quantity 8,748 -5.0%
Value US$6,037
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
0.84
Quantity 873 -0.7%
Value US$733
von Moltke Lisa See Remarks Officer
Transaction date
Planned sale
Price
0.84
Quantity 973 -4.4%
Value US$817
Ege David S. See Remarks Officer
Transaction date
Planned sale
Price
0.84
Quantity 1,128 -1.4%
Value US$948
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
0.84
Quantity 2,518 -1.7%
Value US$2,115
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
0.84
Quantity 923 -1.4%
Value US$775
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
0.84
Quantity 728 -0.9%
Value US$612
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
1.08
Quantity 24,480 -23.8%
Value US$26,534
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
0.94
Quantity 2,435 -1.7%
Value US$2,289
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
0.94
Quantity 843 -0.7%
Value US$792
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
0.94
Quantity 703 -3.8%
Value US$661
Ege David S. See Remarks Officer
Transaction date
Planned sale
Price
0.94
Quantity 1,090 -1.4%
Value US$1,025
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
0.94
Quantity 891 -1.3%
Value US$838
von Moltke Lisa See Remarks Officer
Transaction date
Planned sale
Price
0.94
Quantity 939 -4.7%
Value US$883
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
1.08
Quantity 4,170 -6.2%
Value US$4,504
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
1.08
Quantity 3,939 -3.2%
Value US$4,254
Ege David S. See Remarks Officer
Transaction date
Planned sale
Price
1.08
Quantity 5,010 -6.4%
Value US$5,411
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
1.08
Quantity 11,549 -7.9%
Value US$12,473
1.4
Arkowitz David Chief Financial Officer Officer
Transaction date
Planned sale
Price
1.08
Quantity 3,939 -2.1%
Value US$4,254
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
1.08
Quantity 3,374 -17.7%
Value US$3,644
von Moltke Lisa See Remarks Officer
Transaction date
Planned sale
Price
1.08
Quantity 4,400 -20.6%
Value US$4,752
1.4
Arkowitz David Chief Financial Officer Officer
Transaction date
Planned sale
Price
1.35
Quantity 4,066 -2.3%
Value US$5,489
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
1.35
Quantity 3,886 -6.5%
Value US$5,246
Cloghessy Paula See Remarks Officer
Transaction date
Planned sale
Price
1.35
Quantity 2,904 -6.0%
Value US$3,920
von Moltke Lisa See Remarks Officer
Transaction date
Planned sale
Price
1.35
Quantity 4,232 -30.8%
Value US$5,713
1.6
Shaff Eric D. CEO and President Executive Director
Transaction date
Planned sale
Price
1.35
Quantity 8,552 -6.9%
Value US$11,545
Ege David S. See Remarks Officer
Transaction date
Planned sale
Price
1.35
Quantity 4,066 -5.7%
Value US$5,489
Young Teresa L. See Remarks Officer
Transaction date
Planned sale
Price
1.35
Quantity 2,907 -25.6%
Value US$3,924
1.6
DesRosier Thomas Chief Legal Officer and EVP Officer
Transaction date
Planned sale
Price
1.35
Quantity 4,156 -3.5%
Value US$5,611
Ege David S. See Remarks Officer
Transaction date
Planned sale
Price
5.19
Quantity 7,038 -10.5%
Value US$36,527
Ege David S. See Remarks Officer
Transaction date
Planned sale
Price
7.93
Quantity 5,012 -9.7%
Value US$39,745
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
28.34
Quantity 9,841 -100.0%
Value US$278,894
Henn Matthew R. See Remarks Officer
Transaction date
Planned sale
Price
27.56
Quantity 26,265 -72.7%
Value US$723,863
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-08-18 2026-08-17 PlS Planned sale

See Remarks

Officer
67,548 +7.0%
283.97
US$3,969,324
67,548 +7.0% 283.97 US$3,969,324
2026-08-18 2026-08-17 PlS Planned sale Non-Executive Director
27,688 -1.9%
131.36
US$467,233
27,688 -1.9% 131.36 US$467,233
2026-08-18 2026-08-17 PlS Planned sale

See Remarks

Officer
93,505 -4.9%
147.46
US$22,688
93,505 -4.9% 147.46 US$22,688
2026-08-18 2026-08-17 PlS Planned sale

See Remarks

Officer
1,000 -1.0%
4.55
US$100,000
1,000 -1.0% 4.55 US$100,000
2026-05-19 2026-05-19 PrS Proposed sale

Officer

Officer
167
7.69
US$1,284
167 7.69 US$1,284
2026-05-19 2026-05-18 S Sale

See Remarks

Officer
59 -0.7%
7.53
US$444
59 -0.7% 7.53 US$444
2026-05-19 2026-05-18 PlS Planned sale

See Remarks

Officer
79 -1.0%
7.53
US$595
79 -1.0% 7.53 US$595
2026-05-19 2026-05-18 PlS Planned sale Non-Executive Director
259 -2.1%
7.53
US$1,950
259 -2.1% 7.53 US$1,950
2026-05-19 2026-05-18 PlS Planned sale

See Remarks

Officer
77 -1.0%
7.53
US$580
77 -1.0% 7.53 US$580
2026-03-17 2026-03-17 PrS Proposed sale

Officer

Officer
8,553
9.12
US$77,967
8,553 9.12 US$77,967
2026-02-18 2026-02-15 PlS Planned sale

See Remarks

Officer
78 -1.0%
8.47
US$661
78 -1.0% 8.47 US$661
2026-02-18 2026-02-15 PlS Planned sale

See Remarks

Officer
75 -0.9%
8.47
US$635
75 -0.9% 8.47 US$635
2026-02-18 2026-02-15 PlS Planned sale

See Remarks

Officer
89 -1.1%
8.47
US$754
89 -1.1% 8.47 US$754
2026-02-18 2026-02-15 PlS Planned sale Non-Executive Director
259 -2.2%
8.47
US$2,194
259 -2.2% 8.47 US$2,194
2025-11-18 2025-11-15 PlS Planned sale

See Remarks

Officer
76 -1.0%
17.30
US$1,315
76 -1.0% 17.30 US$1,315
2025-11-18 2025-11-15 PlS Planned sale

See Remarks

Officer
1,257 -14.3%
17.30
US$21,746
1,257 -14.3% 17.30 US$21,746
2025-11-18 2025-11-15 PlS Planned sale Non-Executive Director
217 -1.9%
17.30
US$3,754
217 -1.9% 17.30 US$3,754
2025-11-18 2025-11-15 PlS Planned sale

See Remarks

Officer
1,042 -11.0%
17.30
US$18,027
1,042 -11.0% 17.30 US$18,027
2025-08-19 2025-08-18 PlS Planned sale Non-Executive Director
217 -2.0%
16.65
US$3,613
217 -2.0% 16.65 US$3,613
2025-08-19 2025-08-18 PlS Planned sale

See Remarks

Officer
76 -1.0%
16.65
US$1,265
76 -1.0% 16.65 US$1,265
2025-08-19 2025-08-18 PlS Planned sale

See Remarks

Officer
73 -1.6%
16.65
US$1,215
73 -1.6% 16.65 US$1,215
2025-08-19 2025-08-18 PlS Planned sale

See Remarks

Officer
59 -1.1%
16.65
US$982
59 -1.1% 16.65 US$982
2025-05-19 2025-05-16 PlS Planned sale

CEO and President

Executive Director
220 -2.1%
7.28
US$1,602
220 -2.1% 7.28 US$1,602
2025-05-19 2025-05-16 PlS Planned sale

See Remarks

Officer
63 -1.2%
7.28
US$459
63 -1.2% 7.28 US$459
2025-05-19 2025-05-16 PlS Planned sale

See Remarks

Officer
77 -1.7%
7.28
US$561
77 -1.7% 7.28 US$561
2025-05-19 2025-05-15 PlS Planned sale

Chief Legal Officer and EVP

Officer
79 -1.1%
7.28
US$575
79 -1.1% 7.28 US$575
2025-02-19 2025-02-18 PlS Planned sale

See Remarks

Officer
3,338 -3.3%
0.81
US$2,704
3,338 -3.3% 0.81 US$2,704
2025-02-19 2025-02-18 PlS Planned sale

See Remarks

Officer
3,953 -4.5%
0.81
US$3,204
3,953 -4.5% 0.81 US$3,204
2025-02-19 2025-02-18 PlS Planned sale

See Remarks

Officer
4,416 -10.0%
0.81
US$3,579
4,416 -10.0% 0.81 US$3,579
2025-02-19 2025-02-18 PlS Planned sale

CEO and President

Executive Director
12,726 -6.2%
0.81
US$10,314
12,726 -6.2% 0.81 US$10,314
2025-02-19 2025-02-18 PlS Planned sale

Chief Legal Officer and EVP

Officer
4,300 -2.9%
0.81
US$3,485
4,300 -2.9% 0.81 US$3,485
2024-11-19 2024-11-18 PlS Planned sale

Chief Legal Officer and EVP

Officer
878 -0.6%
0.54
US$475
878 -0.6% 0.54 US$475
2024-11-19 2024-11-18 PlS Planned sale

See Remarks

Officer
977 -2.9%
0.54
US$528
977 -2.9% 0.54 US$528
2024-11-19 2024-11-18 PlS Planned sale

See Remarks

Officer
927 -1.2%
0.54
US$501
927 -1.2% 0.54 US$501
2024-11-19 2024-11-18 PlS Planned sale

See Remarks

Officer
735 -0.8%
0.54
US$398
735 -0.8% 0.54 US$398
2024-11-19 2024-11-18 PlS Planned sale

CEO and President

Executive Director
2,505 -1.4%
0.54
US$1,355
2,505 -1.4% 0.54 US$1,355
2024-10-29 2024-10-28 PlS Planned sale

See Remarks

Officer
4,334 -12.5%
0.69
US$2,991
4,334 -12.5% 0.69 US$2,991
2024-10-29 2024-10-28 PlS Planned sale

See Remarks

Officer
2,983 -3.3%
0.69
US$2,059
2,983 -3.3% 0.69 US$2,059
2024-10-29 2024-10-28 PlS Planned sale

Chief Legal Officer and EVP

Officer
4,259 -3.1%
0.69
US$2,939
4,259 -3.1% 0.69 US$2,939
2024-10-29 2024-10-28 PlS Planned sale

See Remarks

Officer
3,984 -5.0%
0.69
US$2,749
3,984 -5.0% 0.69 US$2,749
2024-10-29 2024-10-28 PlS Planned sale

CEO and President

Executive Director
8,748 -5.0%
0.69
US$6,037
8,748 -5.0% 0.69 US$6,037
2024-08-19 2024-08-16 PlS Planned sale

Chief Legal Officer and EVP

Officer
873 -0.7%
0.84
US$733
873 -0.7% 0.84 US$733
2024-08-19 2024-08-16 PlS Planned sale

See Remarks

Officer
973 -4.4%
0.84
US$817
973 -4.4% 0.84 US$817
2024-08-19 2024-08-16 PlS Planned sale

See Remarks

Officer
1,128 -1.4%
0.84
US$948
1,128 -1.4% 0.84 US$948
2024-08-19 2024-08-16 PlS Planned sale

CEO and President

Executive Director
2,518 -1.7%
0.84
US$2,115
2,518 -1.7% 0.84 US$2,115
2024-08-19 2024-08-16 PlS Planned sale

See Remarks

Officer
923 -1.4%
0.84
US$775
923 -1.4% 0.84 US$775
2024-08-19 2024-08-16 PlS Planned sale

See Remarks

Officer
728 -0.9%
0.84
US$612
728 -0.9% 0.84 US$612
2024-08-06 2024-08-05 PlS Planned sale

See Remarks

Officer
24,480 -23.8%
1.08
US$26,534
24,480 -23.8% 1.08 US$26,534
2024-05-17 2024-05-15 PlS Planned sale

CEO and President

Executive Director
2,435 -1.7%
0.94
US$2,289
2,435 -1.7% 0.94 US$2,289
2024-05-17 2024-05-15 PlS Planned sale

Chief Legal Officer and EVP

Officer
843 -0.7%
0.94
US$792
843 -0.7% 0.94 US$792
2024-05-17 2024-05-15 PlS Planned sale

See Remarks

Officer
703 -3.8%
0.94
US$661
703 -3.8% 0.94 US$661
2024-05-17 2024-05-15 PlS Planned sale

See Remarks

Officer
1,090 -1.4%
0.94
US$1,025
1,090 -1.4% 0.94 US$1,025
2024-05-17 2024-05-15 PlS Planned sale

See Remarks

Officer
891 -1.3%
0.94
US$838
891 -1.3% 0.94 US$838
2024-05-17 2024-05-15 PlS Planned sale

See Remarks

Officer
939 -4.7%
0.94
US$883
939 -4.7% 0.94 US$883
2024-02-16 2024-02-16 PlS Planned sale

See Remarks

Officer
4,170 -6.2%
1.08
US$4,504
4,170 -6.2% 1.08 US$4,504
2024-02-16 2024-02-16 PlS Planned sale

Chief Legal Officer and EVP

Officer
3,939 -3.2%
1.08
US$4,254
3,939 -3.2% 1.08 US$4,254
2024-02-16 2024-02-16 PlS Planned sale

See Remarks

Officer
5,010 -6.4%
1.08
US$5,411
5,010 -6.4% 1.08 US$5,411
2024-02-16 2024-02-16 PlS Planned sale

CEO and President

Executive Director
11,549 -7.9%
1.08
US$12,473
11,549 -7.9% 1.08 US$12,473
2024-02-16 2024-02-16 PlS Planned sale

Chief Financial Officer

Officer
3,939 -2.1%
1.08
US$4,254
3,939 -2.1% 1.08 US$4,254
2024-02-16 2024-02-16 PlS Planned sale

See Remarks

Officer
3,374 -17.7%
1.08
US$3,644
3,374 -17.7% 1.08 US$3,644
2024-02-16 2024-02-16 PlS Planned sale

See Remarks

Officer
4,400 -20.6%
1.08
US$4,752
4,400 -20.6% 1.08 US$4,752
2023-10-31 2023-10-30 PlS Planned sale

Chief Financial Officer

Officer
4,066 -2.3%
1.35
US$5,489
4,066 -2.3% 1.35 US$5,489
2023-10-31 2023-10-30 PlS Planned sale

See Remarks

Officer
3,886 -6.5%
1.35
US$5,246
3,886 -6.5% 1.35 US$5,246
2023-10-31 2023-10-30 PlS Planned sale

See Remarks

Officer
2,904 -6.0%
1.35
US$3,920
2,904 -6.0% 1.35 US$3,920
2023-10-31 2023-10-30 PlS Planned sale

See Remarks

Officer
4,232 -30.8%
1.35
US$5,713
4,232 -30.8% 1.35 US$5,713
2023-10-31 2023-10-30 PlS Planned sale

CEO and President

Executive Director
8,552 -6.9%
1.35
US$11,545
8,552 -6.9% 1.35 US$11,545
2023-10-31 2023-10-30 PlS Planned sale

See Remarks

Officer
4,066 -5.7%
1.35
US$5,489
4,066 -5.7% 1.35 US$5,489
2023-10-31 2023-10-30 PlS Planned sale

See Remarks

Officer
2,907 -25.6%
1.35
US$3,924
2,907 -25.6% 1.35 US$3,924
2023-10-31 2023-10-30 PlS Planned sale

Chief Legal Officer and EVP

Officer
4,156 -3.5%
1.35
US$5,611
4,156 -3.5% 1.35 US$5,611
2023-05-01 2023-04-28 PlS Planned sale

See Remarks

Officer
7,038 -10.5%
5.19
US$36,527
7,038 -10.5% 5.19 US$36,527
2022-10-31 2022-10-31 PlS Planned sale

See Remarks

Officer
5,012 -9.7%
7.93
US$39,745
5,012 -9.7% 7.93 US$39,745
2022-07-07 2022-07-05 B Purchase Large shareholder
5,825,495 +inf%
3.15
US$18,350,309
5,825,495 +inf% 3.15 US$18,350,309
2022-07-07 2022-07-05 B Purchase Large shareholder
2,912,748 +98.3%
3.15
US$9,175,156
2,912,748 +98.3% 3.15 US$9,175,156
2020-12-03 2020-12-01 PlS Planned sale

See Remarks

Officer
9,841 -100.0%
28.34
US$278,894
9,841 -100.0% 28.34 US$278,894
2020-12-03 2020-12-01 PlS Planned sale

See Remarks

Officer
26,265 -72.7%
27.56
US$723,863
26,265 -72.7% 27.56 US$723,863