DESROSIER THOMAS

PrivateCIK: 1435744
Location

LEXINGTON, MA

DESROSIER THOMAS (See Remarks) sold 1.0% of their position (76.00 shares) of SERES THERAPEUTICS, INC. on the open market

Open‑market sale worth $1.3K — 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
-76.00
Net shares
Net seller
$1.3K
Total sold
1
Open market trades
0B · 1S
5
Total transactions
244.00 acquired · 320.00 disposed
Non-Derivative Transactions3

Common Stock

Direct
M · Option Exercise

Shares

+132.00

Price / share

Trade value

% of position

1.8%
11/15/2025
7.46K7.59K

Common Stock

Direct
M · Option Exercise

Shares

+112.00

Price / share

Trade value

% of position

1.5%
11/15/2025
7.59K7.70K

Common Stock

Direct
S · Sale

Shares

76.00

Price / share

$17.30

Trade value

$1.31K

% of position

1.0%
11/15/2025
7.70K7.62K
Total

Net shares

+168.00

Net value

-$1.31K

Derivative Transactions2

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

132.00 shares

Shares

132.00

Strike price

Held after

664.00

Exercisable

11/15/2025

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

112.00 shares

Shares

112.00

Strike price

Held after

1K

Exercisable

11/15/2025
DESROSIER THOMAS — Insider Transaction (Form 4) Filed Nov 18, 2025 | Finecho