Cohen Chad M

SEC source: 0001524314-26-000001 · form4-06042026_110614.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,596

F2 · shares: Represents the number of shares of the Issuer's Common Stock underlying RSUs granted on June 2, 2026. Each RSU represents the contingent right to receive one share of Common Stock upon settlement. 1/4th of the RSUs vest and settle into Common Stock every three months on the same day of the month as the grant date, subject to the Reporting Person's Continuous Service (as defined in the 2022 Plan) through each such vesting date; provided, that the RSUs will vest in full immediately prior to the effective time of a Change in Control (as defined in the 2022 Plan), subject to the Reporting Person's Continuous Service through such time.

SEC source: 0001524314-26-000001 · form4-06042026_110614.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,547

F1 · shares: Represents the number of shares of the Issuer's common stock ("Common Stock") underlying restricted stock units ("RSUs") granted on June 2, 2026. Each RSU represents the contingent right to receive one share of Common Stock upon settlement. 1/4th of the RSUs vest and settle into Common Stock every three months on the same day of the month as the grant date, subject to the Reporting Person's Continuous Service (as defined in the Issuer's Amended and Restated 2022 Equity Incentive Plan (the "2022 Plan")) through each such vesting date; provided, that the RSUs will in any event vest in full on the earlier to occur of (1) immediately prior to the Issuer's 2027 annual stockholder meeting, and (2) immediately prior to the effective time of a Change in Control (as defined in the 2022 Plan), subject to the Reporting Person's Continuous Service through the applicable time.

SEC source: 0001524314-25-000004 · form4-11052025_091103.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,954

F1 · shares: Represents the number of shares of the Issuer's common stock ("Common Stock") underlying restricted stock units ("RSUs") granted in connection with the Reporting Person's appointment to a committee of the Issuer's board of directors. Each RSU represents the contingent right to receive one share of Common Stock upon settlement. One-third of the RSUs vest and settle into Common Stock on January 30, 2026, April 30, 2026, and July 30, 2026, subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2022 Equity Incentive Plan) through each such date.

SEC source: 0001415889-25-022836 · form4a-08232025_120847.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,733

F1 · date: On August 1, 2025, the Reporting Person filed a Form 4 that inadvertently and incorrectly stated the transaction date. This amendment reports the correct transaction date, which is July 30, 2025.

F2 · shares: Represents the number of shares of the Issuer's common stock ("Common Stock") underlying restricted stock units ("RSUs"). Each RSU represents the contingent right to receive one share of Common Stock upon settlement. 25% of the RSUs vest and settle into Common Stock on October 30, 2025, and 25% of the RSUs vest and settle into Common Stock in equal quarterly installments thereafter on the same day of the month as the grant date (or if there is no corresponding day in the applicable month, on the last day of such month), subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2022 Equity Incentive Plan) through each such date.

SEC source: 0001415889-25-015819 · form4-06052025_090654.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,397

F1 · shares: Represents the number of shares of the Issuer's common stock ("Common Stock") underlying restricted stock units ("RSUs") granted to the Reporting Person on June 3, 2025. Each RSU represents the contingent right to receive one share of Common Stock upon settlement. 100% of the RSUs vest and settle into Common Stock on July 19, 2025, subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2022 Equity Incentive Plan) through such date.

SEC source: 0001140361-25-016925 · form4.xml · derivative · entry 5

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 8,158 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: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.exercise_price: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · price: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · price: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · derivative.exercise_date: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.exercise_date: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · derivative.expiration_date: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.expiration_date: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

SEC source: 0001140361-25-016925 · form4.xml · derivative · entry 4

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,158

Underlying: Class A Common Stock · 8,158 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: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.exercise_price: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · price: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · price: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · derivative.exercise_date: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.exercise_date: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · derivative.expiration_date: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.expiration_date: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

SEC source: 0001140361-25-016925 · form4.xml · derivative · entry 3

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Vacasa Holdings Units · 8,158 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: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.exercise_price: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · price: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · price: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · derivative.exercise_date: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.exercise_date: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

F1 · derivative.expiration_date: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · derivative.expiration_date: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

SEC source: 0001140361-25-016925 · form4.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F3 · price: Upon consummation of the Company Merger, each (i) outstanding share of Class A Common Stock was automatically converted into the right to receive $5.30 in cash (the "Merger Consideration") and (ii) outstanding award of restricted stock units automatically converted into the right to receive the product of (a) the aggregate number of shares of Class A Common Stock underlying such award and (b) the Merger Consideration, subject to applicable vesting terms.

SEC source: 0001140361-25-016925 · form4.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,538

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: Pursuant to that certain Agreement and Plan of Merger, dated December 30, 2024 and amended on March 17, 2025 and March 28, 2025 (as amended to date, the "Merger Agreement"), by and among the Issuer, Vacasa Holdings LLC, Casago Holdings, LLC ("Parent"), Vista Merger Sub II Inc., a wholly owned subsidiary of Parent ("Company Merger Sub"), and Vista Merger Sub LLC, a wholly owned subsidiary of Parent ("LLC Merger Sub" and together with Company Merger Sub, "Merger Subs"), LLC Merger Sub merged with and into Vacasa Holdings LLC with Vacasa Holdings LLC surviving such merger as a subsidiary of Parent (the "LLC Merger"), and immediately after the LLC Merger, Company Merger Sub merged with and into the Issuer (the "Issuer Merger" and, together with the LLC Merger, the "Mergers"), with the Issuer surviving such merger as a wholly owned subsidiary of Parent and Vacasa Holdings LLC indirectly becoming a wholly owned subsidiary of Parent.

F2 · price: Immediately prior to the LLC Merger, the Common Units of Vacasa Holdings LLC were redeemed pursuant to which such Common Units and such shares of Class B Common Stock were exchanged for shares of Class A Common Stock in accordance with the Vacasa LLC Agreement. The newly issued shares of Class A Common Stock are entitled to the Merger Consideration (as defined below).

SEC source: 0001415889-25-020856 · form4-08012025_040808.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,733

F1 · shares: Represents the number of shares of the Issuer's common stock ("Common Stock") underlying restricted stock units ("RSUs"). Each RSU represents the contingent right to receive one share of Common Stock upon settlement. 25% of the RSUs vest and settle into Common Stock on October 30, 2025, and 25% of the RSUs vest and settle into Common Stock in equal quarterly installments thereafter on the same day of the month as the grant date (or if there is no corresponding day in the applicable month, on the last day of such month), subject to the Reporting Person's Continuous Service (as defined in the Issuer's 2022 Equity Incentive Plan) through each such date.

SEC source: 0001874944-24-000062 · wk-form4_1716497874.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,380

F1 · shares: Represents an award of restricted stock units, which vests in full on the earlier of (i) the first anniversary of the grant date and (ii) immediately before the next annual meeting of stockholders of the Issuer following the grant date. Each restricted stock unit represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001874944-23-000053 · wf-form4_168497930594210.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 204,939

F1 · shares: Represents an award of restricted stock units, which vests in full on the earlier of (i) the first anniversary of the grant date and (ii) immediately before the next annual meeting of stockholders of the Issuer following the grant date. Each restricted stock unit represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001874944-22-000028 · wf-form4_165350734022905.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,999

F1 · shares: Represents an award of restricted stock units, which vests in full on the earlier of (i) the first anniversary of the grant date and (ii) immediately before the next annual meeting of stockholders of the Issuer following the grant date. Each restricted stock unit represents a contingent right to receive one share of Issuer's Class A Common Stock.

SEC source: 0001209191-21-071193 · doc4.xml · derivative · entry 3

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 80,000

Underlying: Common Stock · 10,000 shares

Expires 2029-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F2 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on January 1, 2020, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-071193 · doc4.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-071193 · doc4.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-064253 · doc4.xml · derivative · entry 6

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,000

Underlying: Common Stock · 5,000 shares

Expires 2029-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F4 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on January 1, 2020, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-064253 · doc4.xml · nonDerivative · entry 4

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F3 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $33.74 to 34.24, inclusive.

SEC source: 0001209191-21-064253 · doc4.xml · nonDerivative · entry 3

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-064253 · doc4.xml · derivative · entry 5

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,000

Underlying: Common Stock · 5,000 shares

Expires 2029-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F4 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on January 1, 2020, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-064253 · doc4.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F2 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $35.54 to 36.43, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, 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 ranges set forth in any footnotes to this Form 4.

SEC source: 0001209191-21-064253 · doc4.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-059985 · doc4.xml · derivative · entry 6

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 5,000 shares

Expires 2029-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F4 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on January 1, 2020, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-059985 · doc4.xml · nonDerivative · entry 4

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F3 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $32.01 to 32.59, inclusive.

SEC source: 0001209191-21-059985 · doc4.xml · nonDerivative · entry 3

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-059985 · doc4.xml · derivative · entry 5

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 105,000

Underlying: Common Stock · 5,000 shares

Expires 2029-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F4 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on January 1, 2020, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-059985 · doc4.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F2 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $32.04 to 33.00, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, 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 ranges set forth in any footnotes to this Form 4.

SEC source: 0001209191-21-059985 · doc4.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-055368 · doc4.xml · derivative · entry 6

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 110,000

Underlying: Common Stock · 5,000 shares

Expires 2029-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F5 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on January 1, 2020, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-055368 · doc4.xml · nonDerivative · entry 4

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F3 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $38.765 to 39.50, inclusive.

SEC source: 0001209191-21-055368 · doc4.xml · nonDerivative · entry 3

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-055368 · doc4.xml · derivative · entry 5

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,625

Underlying: Common Stock · 9,375 shares

Expires 2028-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F4 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on November 1, 2018, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-055368 · doc4.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F2 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $39.25 to 39.97, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, 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 ranges set forth in any footnotes to this Form 4.

SEC source: 0001209191-21-055368 · doc4.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,979

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-051275 · doc4.xml · derivative · entry 7

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 75,000

Underlying: Common Stock · 10,000 shares

Expires 2028-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F5 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on November 1, 2018, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-051275 · doc4.xml · nonDerivative · entry 5

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F4 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $34.26 to 34.58, inclusive.

SEC source: 0001209191-21-051275 · doc4.xml · nonDerivative · entry 4

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,866

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F3 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $33.14 to 34.11, inclusive.

SEC source: 0001209191-21-051275 · doc4.xml · nonDerivative · entry 3

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-051275 · doc4.xml · derivative · entry 6

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,000

Underlying: Common Stock · 5,000 shares

Expires 2028-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F5 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on November 1, 2018, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-051275 · doc4.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F2 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $34.79 to 35.345, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, 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 ranges set forth in any footnotes to this Form 4.

SEC source: 0001209191-21-051275 · doc4.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-046082 · doc4.xml · derivative · entry 7

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,000

Underlying: Common Stock · 10,000 shares

Expires 2028-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F5 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on November 1, 2018, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-046082 · doc4.xml · nonDerivative · entry 5

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F4 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $38.875 to 39.42, inclusive.

SEC source: 0001209191-21-046082 · doc4.xml · nonDerivative · entry 4

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,118

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F3 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $37.775 to 38.735, inclusive.

SEC source: 0001209191-21-046082 · doc4.xml · nonDerivative · entry 3

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-046082 · doc4.xml · derivative · entry 6

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 10,000 shares

Expires 2028-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F5 · derivative.exercise_date: The options vested with respect to 1/4 of such shares on November 1, 2018, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

SEC source: 0001209191-21-046082 · doc4.xml · nonDerivative · entry 2

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,604

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F2 · price: The price reported for this transaction is a weighted-average price. The shares were sold in multiple transactions ranging from $38.32 to 39.31, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, 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 ranges set forth in any footnotes to this Form 4.

SEC source: 0001209191-21-046082 · doc4.xml · nonDerivative · entry 1

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,604

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

SEC source: 0001209191-21-039637 · doc4.xml · derivative · entry 7

Cohen Chad M · CIK 0001524314 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 110,000

Underlying: Common Stock · 10,000 shares

Expires 2028-02-07

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: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 16, 2020.

F6 · derivative.exercise_date: The option is fully vested and exercisable.