HENN MATTHEW R

PrivateCIK: 1767321
Location

CAMBRIDGE, MA

HENN MATTHEW R (Chief Scientific Officer) sold 1.0% of their position (81.00 shares) of SERES THERAPEUTICS, INC. on the open market

Open‑market sale worth $368.55 — 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
-81.00
Net shares
Net seller
$368.55
Total sold
1
Open market trades
0B · 1S
4
Total transactions
238.00 acquired · 319.00 disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+238.00

Price / share

Trade value

% of position

3.0%
8/15/2026
7.84K8.08K

Common Stock

Direct
S · Sale

Shares

81.00

Price / share

$4.55

Trade value

$368.55

% of position

1.0%
8/17/2026
8.08K8K
Total

Net shares

+157.00

Net value

-$368.55

Derivative Transactions2

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

140.00 shares

Shares

140.00

Strike price

Held after

282.00

Exercisable

8/15/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

98.00 shares

Shares

98.00

Strike price

Held after

585.00

Exercisable

8/15/2026