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Seres Therapeutics, Inc.

MCRB Mostly scheduled
CIK 0001609809 #4740 in the set updated 17 Sep 2026
Bought (12 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$54.88K
$5.35K on a plan · $49.09K straight out of an exercise
Sold at will
$444.27
1 of 16 sales
Net
−$54.88K
−$444.27 against sales at will

By person

6 insiders · 16 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Henn Matthew R
See Remarks
$23.45K (4) scheduled
−$23.45K
7,995
$36.38K
Young Teresa L.
See Remarks
$18.66K (2) scheduled
−$18.66K
8,557
$38.93K
Shaff Eric D.
Director
$9.09K (4) scheduled
−$9.09K
12,499
$56.87K
DesRosier Thomas
See Remarks
$2.94K (4) scheduled
−$2.94K
8,117
$36.93K
Brady Kelly
See Remarks
$735.47 (2)
−$735.47
8,679
$39.49K
+2.8%
von Moltke Lisa
See Remarks
39,875
$181.43K
+89.8%

No percentages here. This company's share count has moved by a factor of 19.9 over the window, from 8,754,570 to 174,358,753 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
DesRosier Thomas
17 Aug 2026
See Remarks
Sold on a plan
82
$4.55
$373.10
Henn Matthew R
17 Aug 2026
See Remarks
Sold on a plan
81
$4.55
$368.55
Shaff Eric D.
17 Aug 2026
Director
Sold on a plan
263
$4.55
$1.20K
Brady Kelly
17 Aug 2026
See Remarks
Sold on a plan
64
$4.55
$291.20
Henn Matthew R
18 May 2026
See Remarks
Sold on a plan
77
$7.53
$579.81
Brady Kelly
18 May 2026
See Remarks
Sell
59
$7.53
$444.27
DesRosier Thomas
18 May 2026
See Remarks
Sold on a plan
79
$7.53
$594.87
Shaff Eric D.
18 May 2026
Director
Sold on a plan
259
$7.53
$1.95K
Henn Matthew R
15 Feb 2026
See Remarks
Sold after exercise
89
$8.47
$753.83
DesRosier Thomas
15 Feb 2026
See Remarks
Sold after exercise
78
$8.47
$660.66
Young Teresa L.
15 Feb 2026
See Remarks
Sold after exercise
75
$8.47
$635.25
Shaff Eric D.
15 Feb 2026
Director
Sold after exercise
259
$8.47
$2.19K
Henn Matthew R
15 Nov 2025
See Remarks
Sold after exercise
1,257
$17.30
$21.75K
DesRosier Thomas
15 Nov 2025
See Remarks
Sold after exercise
76
$17.30
$1.31K
Shaff Eric D.
15 Nov 2025
Director
Sold after exercise
217
$17.30
$3.75K
Young Teresa L.
15 Nov 2025
See Remarks
Sold after exercise
1,042
$17.30
$18.03K

What was left out

Form 4 filings counted 38
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 7
Sales straight out of an exercise 8
Sales at will 1
Transactions with no price 0
Shares from compensation/vesting 13,636
History held since 20 Sep 2016