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
Filed: 8/18/2026ACC: 0001193125-26-355718
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
Shares
+238.00
Price / share
—
Trade value
—
% of position
3.0%
8/15/2026
7.84K→8.08K
Common Stock
Direct
Shares
−81.00
Price / share
$4.55
Trade value
$368.55
% of position
1.0%
8/17/2026
8.08K→8K
Total
Net shares
+157.00
Net value
-$368.55
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 8/15/2026 | M · Option Exercise | +238.00 | — | — | 3.0% | 7.84K | 8.08K |
| Common Stock Direct | 8/17/2026 | S · Sale | −81.00 | $4.55 | $368.55 | 1.0% | 8.08K | 8K |
| Total | +157.00 | -$368.55 | ||||||
Derivative Transactions2
Restricted Stock Units
Direct
Converts to
Common Stock
140.00 shares
Shares
−140.00
Strike price
Held after
282.00
Exercisable
—
8/15/2026
Restricted Stock Units
Direct
Converts to
Common Stock
98.00 shares
Shares
−98.00
Strike price
Held after
585.00
Exercisable
—
8/15/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Restricted Stock Units Direct | Common Stock140.00 shares | 8/15/2026 | M · Option Exercise | −140.00 | — | 282.00 | |
| Restricted Stock Units Direct | Common Stock98.00 shares | 8/15/2026 | M · Option Exercise | −98.00 | — | 585.00 |