BRADY KELLY

PrivateCIK: 2117686

Location

CAMBRIDGE, MA

BRADY KELLY enters SERES THERAPEUTICS, INC. with 8.44K shares plus derivative instruments

Holding both equity and derivatives at entry signals strong long-term conviction in the company.

Direct Derivatives

BRADY KELLY

Filed: 3/11/2026ACC: 0001193125-26-102609

InsiderBRADY KELLYCIK 2117686

→

IssuerSERES THERAPEUTICS, INC.CIK 1609809

Officer· See Remarks

Since Mar 2026

8.44K

Baseline shares

100% direct

8.44K

Direct ownership

1 position

23.17K

Derivative underlying

9 instruments

1

Security positions

All direct

Non-Derivative Holdings1

Common Stock

Direct

Shares owned8.44K

Total

8.44K direct8.44K

Security Title	Shares Owned	Ownership Type
Common Stock	8.44K	Direct
Total	8.44K	8.44K direct

Derivative Holdings9

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

2.34K

Shares owned

N/A

Exercise price

23

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

869.00

Shares owned

N/A

Exercise price

23

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

11.70K

Shares owned

N/A

Exercise price

15.64

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

358.00

Shares owned

N/A

Exercise price

0

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

812.00

Shares owned

N/A

Exercise price

23

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

2K

Shares owned

N/A

Exercise price

23

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

1.43K

Shares owned

N/A

Exercise price

23

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

730.00

Shares owned

N/A

Exercise price

0

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

2.92K

Shares owned

N/A

Exercise price

22

Expiration

—

Exercise window

—

Total

Underlying

23.17K

Owned

0.00

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Stock Option (right to buy) Direct	Common Stock	23	—	—	2.34K	N/A
Stock Option (right to buy) Direct	Common Stock	23	—	—	869.00	N/A
Stock Option (right to buy) Direct	Common Stock	15.64	—	—	11.70K	N/A
Restricted Stock Units Direct	Common Stock	0	—	—	358.00	N/A
Stock Option (right to buy) Direct	Common Stock	23	—	—	812.00	N/A
Stock Option (right to buy) Direct	Common Stock	23	—	—	2K	N/A
Stock Option (right to buy) Direct	Common Stock	23	—	—	1.43K	N/A
Restricted Stock Units Direct	Common Stock	0	—	—	730.00	N/A
Stock Option (right to buy) Direct	Common Stock	22	—	—	2.92K	N/A
Total					23.17K	0.00

BRADY KELLY — Initial Ownership Disclosure (Form 3) Filed Mar 11, 2026 | Finecho