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person · Reporting owner

Shaff Eric D.

Disclosed activity across 2 companies

Tapewire entity
22047
SEC CIK
0001643734

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Seres Therapeutics, Inc.MCRB · Entity 7191DirectorAugust 15, 2026August 18, 2026
Sigilon Therapeutics, Inc.SGTX · Entity 11481DirectorAugust 11, 2023August 11, 2023

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-derivativeDirect12,499 Ending reported balance After 2026-08-17 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-08-15 · Exercise / conversion · Acquired 722 · Balance 12,762

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

Row 2 · 2026-08-17 · Sale · Disposed 263 · Balance 12,499

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 securityDirect783 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 390 · Balance 783

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 securityDirect1,993 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 332 · Balance 1,993

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.

Sigilon Therapeutics, Inc.

Report date August 11, 2023 · Filed August 11, 2023

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $8.28 · Expires 2033-05-18Direct0 Reported balance After 2023-08-11 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2023-08-11 · Disposition to issuer · Disposed 683 · Balance 0

F1: Effective May 22, 2023, the Issuer effected a 1-for-13 reverse stock split (the "Reverse Split") of its issued and outstanding shares of Common Stock. Cash was paid in lieu of any fractional shares resulting from the Reverse Split. The Reporting Person's beneficial ownership in this Form 4 has been adjusted for the Reverse Split.

F2: Pursuant to the Merger Agreement, these stock options were cancelled and the Reporting Person was entitled to receive (without interest) (x) an amount in cash (less applicable Tax withholdings) equal to the product of (A) the total number of Shares subject to such option immediately prior to the Acceptance Time multiplied by (B) the excess, if any, of the Closing Amount over the applicable exercise price per Share under such option and (y) one Contingent Value Right per Share subject to such stock option immediately prior to the Acceptance Time.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $9.92 · Expires 2032-05-25Direct0 Reported balance After 2023-08-11 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2023-08-11 · Disposition to issuer · Disposed 683 · Balance 0

F1: Effective May 22, 2023, the Issuer effected a 1-for-13 reverse stock split (the "Reverse Split") of its issued and outstanding shares of Common Stock. Cash was paid in lieu of any fractional shares resulting from the Reverse Split. The Reporting Person's beneficial ownership in this Form 4 has been adjusted for the Reverse Split.

F2: Pursuant to the Merger Agreement, these stock options were cancelled and the Reporting Person was entitled to receive (without interest) (x) an amount in cash (less applicable Tax withholdings) equal to the product of (A) the total number of Shares subject to such option immediately prior to the Acceptance Time multiplied by (B) the excess, if any, of the Closing Amount over the applicable exercise price per Share under such option and (y) one Contingent Value Right per Share subject to such stock option immediately prior to the Acceptance Time.

Filing footnotes · ownership attribution and instrument terms

F1: Effective May 22, 2023, the Issuer effected a 1-for-13 reverse stock split (the "Reverse Split") of its issued and outstanding shares of Common Stock. Cash was paid in lieu of any fractional shares resulting from the Reverse Split. The Reporting Person's beneficial ownership in this Form 4 has been adjusted for the Reverse Split.

F2: Pursuant to the Merger Agreement, these stock options were cancelled and the Reporting Person was entitled to receive (without interest) (x) an amount in cash (less applicable Tax withholdings) equal to the product of (A) the total number of Shares subject to such option immediately prior to the Acceptance Time multiplied by (B) the excess, if any, of the Closing Amount over the applicable exercise price per Share under such option and (y) one Contingent Value Right per Share subject to such stock option immediately prior to the Acceptance Time.

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 21:27 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 263 $4.55 $1,196.65
Disclosure

SEC source: 0001193125-26-355722 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,499

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 21:27 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 332 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-355722 · ownership.xml · derivative · entry 4

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,993

Underlying: Common Stock · 332 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 21:27 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 390 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-355722 · ownership.xml · derivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 783

Underlying: Common Stock · 390 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 21:27 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 722 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-26-355722 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,762

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 6,500 $0.00 Strike: $7.14 $0.00
Disclosure

SEC source: 0001193125-26-300916 · ownership.xml · derivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,500

Underlying: Common Stock · 6,500 shares

Expires 2036-07-07

F1 · derivative.exercise_date: The option vests and becomes exercisable on the earlier to occur of (i) July 8, 2027 or (ii) the day immediately prior to the first annual meeting of the Company's stockholders occurring after July 8, 2026.

Read SEC document
May 18, 2026 Filed May 19, 2026 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 259 $7.53 $1,950.27
Disclosure

SEC source: 0001193125-26-230733 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,040

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 331 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-230733 · ownership.xml · derivative · entry 4

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,325

Underlying: Common Stock · 331 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 391 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-230733 · ownership.xml · derivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,173

Underlying: Common Stock · 391 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 722 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-26-230733 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,299

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, 2026 Filed Feb 18, 2026 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 333 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-057156 · ownership.xml · derivative · entry 4

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,656

Underlying: Common Stock · 333 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 391 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-057156 · ownership.xml · derivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,564

Underlying: Common Stock · 391 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 259 $8.47 $2,193.73
Disclosure

SEC source: 0001193125-26-057156 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,577

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.

Read SEC document
February 15, 2026 Filed Feb 18, 2026 21:30 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 723 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-26-057156 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,836

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 331 $0.00 $0.00
Disclosure

SEC source: 0001193125-25-286235 · ownership.xml · derivative · entry 5

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,989

Underlying: Common Stock · 331 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 390 $0.00 $0.00
Disclosure

SEC source: 0001193125-25-286235 · ownership.xml · derivative · entry 4

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,954

Underlying: Common Stock · 390 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 217 $17.30 $3,754.10
Disclosure

SEC source: 0001193125-25-286235 · ownership.xml · nonDerivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,113

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 331 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-286235 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,330

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 390 Not disclosed Not disclosed
Disclosure

SEC source: 0001193125-25-286235 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,999

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 20:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 217 $16.65 $3,613.05
Disclosure

SEC source: 0000950170-25-110096 · ownership.xml · nonDerivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,609

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 20:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 333 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-110096 · ownership.xml · derivative · entry 5

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,320

Underlying: Common Stock · 333 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 20:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 391 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-110096 · ownership.xml · derivative · entry 4

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,344

Underlying: Common Stock · 391 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 20:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 333 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-110096 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,826

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 20:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 391 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-110096 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,493

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 16, 2025 Filed May 19, 2025 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 220 $7.28 $1,601.60
Disclosure

SEC source: 0000950170-25-074327 · ownership.xml · nonDerivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,102

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 / conversionRestricted Stock Units · Derivative 331 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-074327 · ownership.xml · derivative · entry 5

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,653

Underlying: Common Stock · 331 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 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 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 390 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-074327 · ownership.xml · derivative · entry 4

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,735

Underlying: Common Stock · 390 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, 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 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 Exercise / conversionCommon Stock 331 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-074327 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,322

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.

Read SEC document
May 15, 2025 Filed May 19, 2025 20:05 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 390 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-074327 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,991

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.

Read SEC document
February 18, 2025 Filed Feb 20, 2025 01:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 12,726 $0.81 $10,314.42
Disclosure

SEC source: 0000950170-25-023575 · ownership.xml · nonDerivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 192,039

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 $0.8354, 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, 2025 Filed Feb 20, 2025 01:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 26,563 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-023575 · ownership.xml · derivative · entry 5

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 79,687

Underlying: Common Stock · 26,563 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 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 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, 2025 Filed Feb 20, 2025 01:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 7,813 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-023575 · ownership.xml · derivative · entry 4

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 62,500

Underlying: Common Stock · 7,813 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, 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 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 01:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 26,563 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-023575 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 204,765

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 01:08 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 7,813 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-25-023575 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 178,202

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 1,950,000 $0.00 Strike: $0.78 $0.00
Disclosure

SEC source: 0000950170-25-017912 · ownership.xml · derivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,950,000

Underlying: Common Stock · 1,950,000 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.

Read SEC document
November 18, 2024 Filed Nov 19, 2024 21:15 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 2,505 $0.54 $1,354.95
Disclosure

SEC source: 0000950170-24-128609 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 170,389

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 $ 0.5638, 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
November 15, 2024 Filed Nov 19, 2024 21:15 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 7,812 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-128609 · ownership.xml · derivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 70,313

Underlying: Common Stock · 7,812 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, 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 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 21:15 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 7,812 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-128609 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 172,894

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 22:24 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 8,748 $0.69 $6,036.99
Disclosure

SEC source: 0000950170-24-118409 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 165,082

F3 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on April 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 $ 0.69605, 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 22:24 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 27,837 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-118409 · ownership.xml · derivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 27,837 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 55,675 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 27,838 RSUs on October 27, 2023, the date that was six months from the Initial Milestone Date. The remaining 27,837 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 22:24 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 27,837 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-118409 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 173,830

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 55,675 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 27,838 RSUs on October 27, 2023, the date that was six months from the Initial Milestone Date. The remaining 27,837 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 21:38 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 2,518 $0.84 $2,115.12
Disclosure

SEC source: 0000950170-24-098712 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 145,993

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 $ 0.880001, 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 21:38 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 7,813 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-098712 · ownership.xml · derivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 78,125

Underlying: Common Stock · 7,813 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, 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 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 21:38 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 7,813 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-098712 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 148,511

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 00:18 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 7,812 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-062059 · ownership.xml · derivative · entry 3

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 85,938

Underlying: Common Stock · 7,812 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, 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 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 00:18 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 2,435 $0.94 $2,288.90
Disclosure

SEC source: 0000950170-24-062059 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 140,698

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 $0.950451, 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 00:18 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 7,812 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-062059 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 143,133

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 02:42 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 SaleCommon Stock 11,549 $1.08 $12,472.92
Disclosure

SEC source: 0000950170-24-016710 · ownership.xml · nonDerivative · entry 2

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 135,321

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 $1.1101, 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 02:42 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionRestricted Stock Units · Derivative 31,250 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-016710 · ownership.xml · derivative · entry 6

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 93,750

Underlying: Common Stock · 31,250 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 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 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 02:42 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 Exercise / conversionCommon Stock 31,250 Not disclosed Not disclosed
Disclosure

SEC source: 0000950170-24-016710 · ownership.xml · nonDerivative · entry 1

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 146,870

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 14, 2024 Filed Feb 17, 2024 02:42 UTC Seres Therapeutics, Inc. MCRB · Entity 7191 GrantRestricted Stock Units · Derivative 106,250 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-016710 · ownership.xml · derivative · entry 5

Shaff Eric D. · CIK 0001643734 · Director · CEO and President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 106,250

Underlying: Common Stock · 106,250 shares

Expires not disclosed

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

F6 · derivative.exercise_date: The restricted stock units will vest and settle as to 25% of the restricted stock units on February 15, 2025. 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.

F6 · derivative.expiration_date: The restricted stock units will vest and settle as to 25% of the restricted stock units on February 15, 2025. 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

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