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$MCRB All transactions

Seres Therapeutics, Inc.

M 10b5-1 Plan

$ Value

Shares

98

Price

Filed

Nov 18

Insider

Name

Henn Matthew R

Title

See Remarks

CIK

0001767321

Roles

Officer

Transaction Details

Transaction Date

2025-11-15

Code

M

Table

Non-Derivative

Ownership

Direct

Equity Swap

No

Shares After

8,784

Footnotes

Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer common stock. | The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on April 13, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units. | The RSUs vested in a single installment on November 15, 2025. The RSUs have no expiration date. | The restricted stock units vested and settled as to 25% of the restricted stock units on February 15, 2024. The remainder of the restricted stock units have vested and settled or will vest and settle in 12 equal quarterly installments thereafter. The restricted stock units have no expiration date. | The restricted stock units vested and settled as to 25% of the restricted stock units on February 15, 2025. The remainder of the restricted stock units have vested and settled or will vest and settle in 12 equal quarterly installments thereafter. The restricted stock units have no expiration date.

Filing Info

Accession No.

0001193125-25-286226

Form Type

4

Issuer CIK

0001609809

Henn Matthew R's History

Date Ticker Type Value
2026-03-04 MCRB A $0
2026-02-15 MCRB M
2026-02-15 MCRB $754
2026-02-15 MCRB M $0
2026-02-15 MCRB M $0
2025-11-15 MCRB M
2025-11-15 MCRB M
2025-11-15 MCRB M
2025-11-15 MCRB $22K
2025-11-15 MCRB M $0

Other Insiders at MCRB (90d)

Insider Bought Sold Last
Kender Richard N
See Remarks
2026-03-04
DesRosier Thomas
See Remarks
$661 2026-03-04
Shaff Eric D. $2K 2026-02-15
Henn Matthew R
See Remarks
$754 2026-03-04
Young Teresa L.
See Remarks
$635 2026-02-15
Thorell Marella
See Remarks
2026-03-04
Brady Kelly
See Remarks
2026-03-04