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DesRosier Thomas

Disclosed activity across 1 company

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22183
SEC CIK
0001435744

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Seres Therapeutics, Inc.MCRB · Entity 7191See RemarksAugust 15, 2026August 18, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Seres Therapeutics, Inc.

Report date August 15, 2026 · Filed August 18, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect8,117 Ending reported balance After 2026-08-17 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-08-15 · Exercise / conversion · Acquired 245 · Balance 8,199

F1: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Row 2 · 2026-08-17 · Sale · Disposed 82 · Balance 8,117

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect265 Reported balance After 2026-08-15 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-08-15 · Exercise / conversion · Disposed 133 · Balance 265

F1: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3: 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.

Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect667 Reported balance After 2026-08-15 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2026-08-15 · Exercise / conversion · Disposed 112 · Balance 667

F1: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4: 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 footnotes · ownership attribution and instrument terms

F1: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F3: 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.

F4: 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
August 17, 2026 Filed Aug 18, 2026 21:22 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 82 $4.55 $373.10
Disclosure

SEC source: 0001193125-26-355712 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,117

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

Read SEC document
August 15, 2026 Filed Aug 18, 2026 21:22 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 112 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-355712 · ownership.xml · derivative · entry 4

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 667

Underlying: Common Stock · 112 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_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.

F4 · derivative.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.

Read SEC document
August 15, 2026 Filed Aug 18, 2026 21:22 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 133 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-355712 · ownership.xml · derivative · entry 3

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 265

Underlying: Common Stock · 133 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_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.

F3 · derivative.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.

Read SEC document
August 15, 2026 Filed Aug 18, 2026 21:22 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 245 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-26-355712 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,199

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
July 08, 2026 Filed Jul 10, 2026 20:15 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 GrantStock Option (right to buy) · Derivative 7,500 $0.00 Strike: $9.13 $0.00
Disclosure

SEC source: 0001193125-26-300919 · ownership.xml · derivative · entry 1

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,500

Underlying: Common Stock · 7,500 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The option will vest as to 25% of the shares on March 2, 2027. The remainder of the shares will vest in 12 equal quarterly installments thereafter.

Read SEC document
May 18, 2026 Filed May 19, 2026 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 79 $7.53 $594.87
Disclosure

SEC source: 0001193125-26-230728 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,954

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

Read SEC document
May 15, 2026 Filed May 19, 2026 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 111 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-230728 · ownership.xml · derivative · entry 4

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 779

Underlying: Common Stock · 111 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_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.

F4 · derivative.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.

Read SEC document
May 15, 2026 Filed May 19, 2026 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 133 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-230728 · ownership.xml · derivative · entry 3

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 398

Underlying: Common Stock · 133 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_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.

F3 · derivative.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.

Read SEC document
May 15, 2026 Filed May 19, 2026 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 244 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-26-230728 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,033

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
March 04, 2026 Filed Mar 6, 2026 21:31 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 GrantStock Option (right to buy) · Derivative 22,500 $0.00 Strike: $9.13 $0.00
Disclosure

SEC source: 0001193125-26-096678 · ownership.xml · derivative · entry 1

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,500

Underlying: Common Stock · 22,500 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The option will vest as to 25% of the shares on March 2, 2027. The remainder of the shares will vest in 12 equal quarterly installments thereafter.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 111 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-057154 · ownership.xml · derivative · entry 4

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 890

Underlying: Common Stock · 111 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_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.

F4 · derivative.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.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 133 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-057154 · ownership.xml · derivative · entry 3

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 531

Underlying: Common Stock · 133 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_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.

F3 · derivative.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.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 78 $8.47 $660.66
Disclosure

SEC source: 0001193125-26-057154 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,789

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 244 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-26-057154 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,867

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 112 $0.00 $0.00
Disclosure

SEC source: 0001193125-25-286240 · ownership.xml · derivative · entry 5

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,001

Underlying: Common Stock · 112 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_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.

F4 · derivative.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.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 132 $0.00 $0.00
Disclosure

SEC source: 0001193125-25-286240 · ownership.xml · derivative · entry 4

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 664

Underlying: Common Stock · 132 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_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.

F3 · derivative.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.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 76 $17.30 $1,314.80
Disclosure

SEC source: 0001193125-25-286240 · ownership.xml · nonDerivative · entry 3

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,623

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 112 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-286240 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,699

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 132 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-286240 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,587

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
August 18, 2025 Filed Aug 19, 2025 20:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 76 $16.65 $1,265.40
Disclosure

SEC source: 0001193125-25-183436 · ownership.xml · nonDerivative · entry 3

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,455

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 111 $0.00 $0.00
Disclosure

SEC source: 0001193125-25-183436 · ownership.xml · derivative · entry 5

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,113

Underlying: Common Stock · 111 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_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.

F4 · derivative.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.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 133 $0.00 $0.00
Disclosure

SEC source: 0001193125-25-183436 · ownership.xml · derivative · entry 4

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 796

Underlying: Common Stock · 133 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F3 · derivative.exercise_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.

F3 · derivative.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.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 111 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-183436 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,531

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 133 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-183436 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,420

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
May 15, 2025 Filed May 19, 2025 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 111 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-074325 · ownership.xml · derivative · entry 5

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,224

Underlying: Common Stock · 111 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F5 · derivative.exercise_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.

F5 · derivative.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.

F2 · balance_after: Reflects a 1-for-20 reverse stock split effected on April 21, 2025.

Read SEC document
May 15, 2025 Filed May 19, 2025 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 133 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-074325 · ownership.xml · derivative · entry 4

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 929

Underlying: Common Stock · 133 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

F2 · balance_after: Reflects a 1-for-20 reverse stock split effected on April 21, 2025.

Read SEC document
May 15, 2025 Filed May 19, 2025 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 79 $7.28 $575.12
Disclosure

SEC source: 0000950170-25-074325 · ownership.xml · nonDerivative · entry 3

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,287

F3 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F2 · balance_after: Reflects a 1-for-20 reverse stock split effected on April 21, 2025.

Read SEC document
May 15, 2025 Filed May 19, 2025 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 111 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-074325 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,366

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F2 · balance_after: Reflects a 1-for-20 reverse stock split effected on April 21, 2025.

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May 15, 2025 Filed May 19, 2025 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 133 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-074325 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,255

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F2 · balance_after: Reflects a 1-for-20 reverse stock split effected on April 21, 2025.

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February 18, 2025 Filed Feb 20, 2025 01:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 4,300 $0.81 $3,485.15
Disclosure

SEC source: 0000950170-25-023573 · ownership.xml · nonDerivative · entry 3

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 142,456

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F3 · price: The price reported in column 4 is a weighted average of the sale prices. These shares were sold in multiple transactions at prices ranging from $0.81 to $0.8385, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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February 15, 2025 Filed Feb 20, 2025 01:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 8,907 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-023573 · ownership.xml · derivative · entry 5

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,718

Underlying: Common Stock · 8,907 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F5 · derivative.exercise_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.

F5 · derivative.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.

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February 15, 2025 Filed Feb 20, 2025 01:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 2,657 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-023573 · ownership.xml · derivative · entry 4

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 21,250

Underlying: Common Stock · 2,657 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

Read SEC document
February 15, 2025 Filed Feb 20, 2025 01:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 8,907 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-023573 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 146,756

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
February 15, 2025 Filed Feb 20, 2025 01:07 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 2,657 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-023573 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 137,849

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
February 07, 2025 Filed Feb 11, 2025 21:15 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 GrantStock Option (Right to Buy) · Derivative 650,000 $0.00 Strike: $0.78 $0.00
Disclosure

SEC source: 0000950170-25-017910 · ownership.xml · derivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 650,000

Underlying: Common Stock · 650,000 shares

Expires 2035-02-06

F1 · derivative.exercise_date: The option will vest as to 25% of the shares on February 7, 2026. The remainder of the shares will vest in 12 equal quarterly installments thereafter.

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November 18, 2024 Filed Nov 19, 2024 21:21 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 878 $0.54 $474.73
Disclosure

SEC source: 0000950170-24-128631 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 135,192

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F3 · price: The price reported in column 4 is a weighted average of the sale prices. These shares were sold in multiple transactions at prices ranging from $0.5406 to $0.5442, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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November 15, 2024 Filed Nov 19, 2024 21:21 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 2,656 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-128631 · ownership.xml · derivative · entry 3

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,907

Underlying: Common Stock · 2,656 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

Read SEC document
November 15, 2024 Filed Nov 19, 2024 21:21 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 2,656 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-128631 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 136,070

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
October 28, 2024 Filed Oct 29, 2024 22:26 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 4,259 $0.69 $2,939.14
Disclosure

SEC source: 0000950170-24-118415 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 133,414

F3 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on May 4, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F4 · price: The price reported in column 4 is a weighted average of the sale prices. These shares were sold in multiple transactions at prices ranging from $0.69 to $ 0.6934, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
October 27, 2024 Filed Oct 29, 2024 22:26 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 13,500 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-118415 · ownership.xml · derivative · entry 3

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Issuer common stock. The RSUs do not have an expiration date.

F1 · derivative.exercise_date: On February 3, 2023, the reporting person was granted an award of 27,001 restricted stock units ("RSUs"), which vest in the form of shares of the Issuer's common stock in two substantially equal installments upon the satisfaction of certain performance criteria. On April 27, 2023 (the "Initial Milestone Date"), the Issuer's Administrator determined that the performance criteria for the first installment were met, resulting in the vesting and settlement of the award as to 13,501 RSUs on October 27, 2023, the date that was six months from the Initial Milestone Date. The remaining 13,500 RSUs vested and settled on October 27, 2024, the date that was eighteen months from the Initial Milestone Date.

F2 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of Issuer common stock. The RSUs do not have an expiration date.

Read SEC document
October 27, 2024 Filed Oct 29, 2024 22:26 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 13,500 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-118415 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 137,673

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: On February 3, 2023, the reporting person was granted an award of 27,001 restricted stock units ("RSUs"), which vest in the form of shares of the Issuer's common stock in two substantially equal installments upon the satisfaction of certain performance criteria. On April 27, 2023 (the "Initial Milestone Date"), the Issuer's Administrator determined that the performance criteria for the first installment were met, resulting in the vesting and settlement of the award as to 13,501 RSUs on October 27, 2023, the date that was six months from the Initial Milestone Date. The remaining 13,500 RSUs vested and settled on October 27, 2024, the date that was eighteen months from the Initial Milestone Date.

F2 · price: Each RSU represents a contingent right to receive one share of Issuer common stock. The RSUs do not have an expiration date.

Read SEC document
August 16, 2024 Filed Aug 19, 2024 21:48 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 873 $0.84 $733.32
Disclosure

SEC source: 0000950170-24-098719 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 124,173

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F3 · price: The price reported in column 4 is a weighted average of the sale prices. These shares were sold in multiple transactions at prices ranging from $0.8414 to $0.8863, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
August 15, 2024 Filed Aug 19, 2024 21:48 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 2,656 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-098719 · ownership.xml · derivative · entry 3

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,563

Underlying: Common Stock · 2,656 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

Read SEC document
August 15, 2024 Filed Aug 19, 2024 21:48 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 2,656 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-098719 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 125,046

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
May 15, 2024 Filed May 18, 2024 00:14 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 2,656 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-062052 · ownership.xml · derivative · entry 3

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,219

Underlying: Common Stock · 2,656 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

Read SEC document
May 15, 2024 Filed May 18, 2024 00:14 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 843 $0.94 $792.42
Disclosure

SEC source: 0000950170-24-062052 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 122,390

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F3 · price: The price reported in column 4 is a weighted average of the sale prices. These shares were sold in multiple transactions at prices ranging from $0.94 to $0.943, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
May 15, 2024 Filed May 18, 2024 00:14 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 2,656 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-062052 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 123,233

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document
February 16, 2024 Filed Feb 17, 2024 02:48 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 3,939 $1.08 $4,254.12
Disclosure

SEC source: 0000950170-24-016712 · ownership.xml · nonDerivative · entry 2

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 120,577

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on March 2, 2023, solely with the intent to cover taxes in connection with the vesting of the restricted stock units.

F3 · price: The price reported in column 4 is a weighted average of the price. These shares were sold in multiple transactions at prices ranging from $1.08 to $1.115, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Read SEC document
February 15, 2024 Filed Feb 17, 2024 02:48 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 10,625 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-016712 · ownership.xml · derivative · entry 6

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 31,875

Underlying: Common Stock · 10,625 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

F7 · derivative.exercise_date: 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 will vest and settle in 12 equal quarterly installments thereafter. The restricted stock units have no expiration date.

F7 · derivative.expiration_date: 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 will vest and settle in 12 equal quarterly installments thereafter. The restricted stock units have no expiration date.

Read SEC document
February 15, 2024 Filed Feb 17, 2024 02:48 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 10,625 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-016712 · ownership.xml · nonDerivative · entry 1

DesRosier Thomas · CIK 0001435744 · Chief Legal Officer and EVP

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 124,516

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.