HENN MATTHEW R

PrivateCIK: 1767321
Location

CAMBRIDGE, MA

HENN MATTHEW R (Chief Scientific Officer) sold 1.7% of their position (77.00 shares) of SERES THERAPEUTICS, INC. on the open market

Open‑market sale worth $560.56 — 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
-77.00
Net shares
Net seller
$560.56
Total sold
1
Open market trades
0B · 1S
5
Total transactions
238.00 acquired · 315.00 disposed
Non-Derivative Transactions3

Common Stock

Direct
M · Option Exercise

Shares

+140.00

Price / share

Trade value

% of position

3.3%
5/15/2025
4.22K4.36K

Common Stock

Direct
M · Option Exercise

Shares

+98.00

Price / share

Trade value

% of position

2.2%
5/15/2025
4.36K4.46K

Common Stock

Direct
S · Sale

Shares

77.00

Price / share

$7.28

Trade value

$560.56

% of position

1.7%
5/16/2025
4.46K4.38K
Total

Net shares

+161.00

Net value

-$560.56

Derivative Transactions2

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

140.00 shares

Shares

140.00

Strike price

Held after

985.00

Exercisable

5/15/2025

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

98.00 shares

Shares

98.00

Strike price

Held after

1.07K

Exercisable

5/15/2025
HENN MATTHEW R — Insider Transaction (Form 4) Filed May 19, 2025 | Finecho