DESROSIER THOMAS

PrivateCIK: 1435744
Location

LEXINGTON, MA

DESROSIER THOMAS (See Remarks) sold 1.0% of their position (78.00 shares) of SERES THERAPEUTICS, INC. on the open market

Open‑market sale worth $660.66 — 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
-78.00
Net shares
Net seller
$660.66
Total sold
1
Open market trades
0B · 1S
4
Total transactions
244.00 acquired · 322.00 disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+244.00

Price / share

Trade value

% of position

3.2%
2/15/2026
7.62K7.87K

Common Stock

Direct
S · Sale

Shares

78.00

Price / share

$8.47

Trade value

$660.66

% of position

1.0%
2/15/2026
7.87K7.79K
Total

Net shares

+166.00

Net value

-$660.66

Derivative Transactions2

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

133.00 shares

Shares

133.00

Strike price

Held after

531.00

Exercisable

2/15/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

111.00 shares

Shares

111.00

Strike price

Held after

890.00

Exercisable

2/15/2026
DESROSIER THOMAS — Insider Transaction (Form 4) Filed Feb 18, 2026 | Finecho