HENN MATTHEW R

PrivateCIK: 1767321
Location

CAMBRIDGE, MA

HENN MATTHEW R (Chief Scientific Officer) sold 1.1% of their position (89.00 shares) of SERES THERAPEUTICS, INC. on the open market

Open‑market sale worth $753.83 — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderHENN MATTHEW RCIK 1767321
IssuerSERES THERAPEUTICS, INC.CIK 1609809
Officer· Chief Scientific Officer
Since Feb 2019
-89.00
Net shares
Net seller
$753.83
Total sold
1
Open market trades
0B · 1S
4
Total transactions
239.00 acquired · 328.00 disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+239.00

Price / share

Trade value

% of position

3.2%
2/15/2026
7.53K7.77K

Common Stock

Direct
S · Sale

Shares

89.00

Price / share

$8.47

Trade value

$753.83

% of position

1.1%
2/15/2026
7.77K7.68K
Total

Net shares

+150.00

Net value

-$753.83

Derivative Transactions2

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

141.00 shares

Shares

141.00

Strike price

Held after

563.00

Exercisable

2/15/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

98.00 shares

Shares

98.00

Strike price

Held after

780.00

Exercisable

2/15/2026
HENN MATTHEW R — Insider Transaction (Form 4) Filed Feb 18, 2026 | Finecho