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$MCRB All transactions

Seres Therapeutics, Inc.

M 10b5-1 Plan

$ Value

$0

Shares

98

Price

$0

Filed

May 19

Insider

Name

Young Teresa L.

Title

See Remarks

CIK

0001814656

Roles

Officer

Transaction Details

Transaction Date

2025-05-15

Code

M

Table

Derivative

Ownership

Direct

Equity Swap

No

Shares After

1,073

Footnotes

Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. | Reflects a 1-for-20 reverse stock split effected on April 21, 2025. | The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 5, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units. | The restricted stock units have 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 have 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.

0000950170-25-074328

Form Type

4

Issuer CIK

0001609809

Young Teresa L.'s History

Date Ticker Type Value
2026-02-15 MCRB M
2026-02-15 MCRB $635
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 $18K
2025-11-15 MCRB M $0
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