DESROSIER THOMAS

PrivateCIK: 1435744
Location

LEXINGTON, MA

DESROSIER THOMAS (See Remarks) sold 1.0% of their position (82.00 shares) of SERES THERAPEUTICS, INC. on the open market

Open‑market sale worth $373.10 — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderDESROSIER THOMASCIK 1435744
IssuerSERES THERAPEUTICS, INC.CIK 1609809
Officer· See Remarks
Since Mar 2026
-82.00
Net shares
Net seller
$373.10
Total sold
1
Open market trades
0B · 1S
4
Total transactions
245.00 acquired · 327.00 disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+245.00

Price / share

Trade value

% of position

3.1%
8/15/2026
7.95K8.20K

Common Stock

Direct
S · Sale

Shares

82.00

Price / share

$4.55

Trade value

$373.10

% of position

1.0%
8/17/2026
8.20K8.12K
Total

Net shares

+163.00

Net value

-$373.10

Derivative Transactions2

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

133.00 shares

Shares

133.00

Strike price

Held after

265.00

Exercisable

8/15/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

112.00 shares

Shares

112.00

Strike price

Held after

667.00

Exercisable

8/15/2026