W

SEC source: 0001616707-25-000141 · wk-form4_1762983642.xml · nonDerivative · entry 1

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 211,887

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on behalf of the revocable trust, as trustee, on August 5, 2025.

SEC source: 0001616707-25-000135 · wk-form4_1762554921.xml · nonDerivative · entry 3

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 214,769

F2 · kind: Represents a transfer to the revocable trust. The reporting person is the trustee of the revocable trust, and members of the reporting person's immediate family are the sole beneficiaries of the revocable trust.

SEC source: 0001616707-25-000135 · wk-form4_1762554921.xml · nonDerivative · entry 2

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

F2 · kind: Represents a transfer to the revocable trust. The reporting person is the trustee of the revocable trust, and members of the reporting person's immediate family are the sole beneficiaries of the revocable trust.

SEC source: 0001616707-25-000135 · wk-form4_1762554921.xml · nonDerivative · entry 1

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 198,860

F1 · kind: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on behalf of the revocable trust, as trustee, on August 5, 2025.

SEC source: 0001616707-25-000131 · wk-form4_1762464985.xml · nonDerivative · entry 1

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 175,497

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 6, 2025.

SEC source: 0001616707-25-000129 · wk-form4_1762377994.xml · nonDerivative · entry 1

Frost Diana · CIK 0002006401 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,676

F1 · shares: These shares represent the number of shares of Class A Common Stock withheld by the issuer to satisfy the reporting person's tax withholding obligation in connection with the vesting of Restricted Stock Units.

SEC source: 0001620093-25-000039 · wk-form4_1761770700.xml · nonDerivative · entry 7

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 139,137

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.18 to $108.35, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620093-25-000039 · wk-form4_1761770700.xml · nonDerivative · entry 6

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 139,537

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.13 to $107.99, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620093-25-000039 · wk-form4_1761770700.xml · nonDerivative · entry 5

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 142,152

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.13 to $107.12, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620093-25-000039 · wk-form4_1761770700.xml · nonDerivative · entry 4

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 150,234

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.12 to $106.10, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620093-25-000039 · wk-form4_1761770700.xml · nonDerivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 155,755

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.06 to $105.03, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620093-25-000039 · wk-form4_1761770700.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 158,413

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.06 to $103.99, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620093-25-000039 · wk-form4_1761770700.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 164,299

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.00 to $102.99, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620052-25-000040 · wk-form4_1761770787.xml · nonDerivative · entry 7

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 139,073

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.21 to $108.34, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620052-25-000040 · wk-form4_1761770787.xml · nonDerivative · entry 6

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 139,472

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.16 to $107.99, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620052-25-000040 · wk-form4_1761770787.xml · nonDerivative · entry 5

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 142,055

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.10 to $107.06, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620052-25-000040 · wk-form4_1761770787.xml · nonDerivative · entry 4

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 150,226

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.09 to $106.08, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620052-25-000040 · wk-form4_1761770787.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 155,720

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.06 to $105.03, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620052-25-000040 · wk-form4_1761770787.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 158,394

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $103.00 to $103.99, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001620052-25-000040 · wk-form4_1761770787.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 164,431

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $102.00 to $102.99, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000119 · wk-form4_1761338712.xml · nonDerivative · entry 4

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 169,137

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.42 to $83.67, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000119 · wk-form4_1761338712.xml · nonDerivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 176,531

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.42 to $83.41, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000119 · wk-form4_1761338712.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 228,465

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.41 to $82.40, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000119 · wk-form4_1761338712.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 254,523

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.41 to $81.40, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000121 · wk-form4_1761338877.xml · nonDerivative · entry 4

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 169,073

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.42 to $83.67, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000121 · wk-form4_1761338877.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 176,154

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.42 to $83.41, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000121 · wk-form4_1761338877.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 228,366

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.41 to $82.40, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000121 · wk-form4_1761338877.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 254,769

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 29, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.41 to $81.40, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000115 · wk-form4_1761164192.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 289,137

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 15, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.70 to $83.55, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000115 · wk-form4_1761164192.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 354,853

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 15, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.70 to $82.69, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000113 · wk-form4_1761164066.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 289,073

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 15, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.70 to $83.55, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000113 · wk-form4_1761164066.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director · Co-Founder · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 354,783

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 15, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.70 to $82.69, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., 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 this footnote.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · derivative · entry 11

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 25,444 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 Class A Common Stock when vested.

F7 · derivative.exercise_date: These RSUs, which were granted on September 22, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

F7 · derivative.expiration_date: These RSUs, which were granted on September 22, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · derivative · entry 10

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,880

Underlying: Class A Common Stock · 584 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 Class A Common Stock when vested.

F6 · derivative.exercise_date: These RSUs, which were granted on February 1, 2023, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 584 shares will vest on each of January 1, 2026, and April 1, 2026, and an aggregate amount of 1,712 shares will vest in equal quarterly amounts commencing July 1, 2026.

F6 · derivative.expiration_date: These RSUs, which were granted on February 1, 2023, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 584 shares will vest on each of January 1, 2026, and April 1, 2026, and an aggregate amount of 1,712 shares will vest in equal quarterly amounts commencing July 1, 2026.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · derivative · entry 9

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,309

Underlying: Class A Common Stock · 217 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 Class A Common Stock when vested.

F5 · derivative.exercise_date: These RSUs, which were granted on April 18, 2022, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 217 shares will vest on each of January 1, 2026, and April 1, 2026, and an aggregate amount of 875 shares will vest in substantially equal quarterly amounts commencing July 1, 2026.

F5 · derivative.expiration_date: These RSUs, which were granted on April 18, 2022, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 217 shares will vest on each of January 1, 2026, and April 1, 2026, and an aggregate amount of 875 shares will vest in substantially equal quarterly amounts commencing July 1, 2026.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · derivative · entry 8

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,567

Underlying: Class A Common Stock · 181 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 Class A Common Stock when vested.

F4 · derivative.exercise_date: These RSUs, which were granted on November 11, 2021, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, an aggregate amount of 1,567 shares will vest in substantially equal quarterly amounts commencing on January 1, 2026.

F4 · derivative.expiration_date: These RSUs, which were granted on November 11, 2021, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, an aggregate amount of 1,567 shares will vest in substantially equal quarterly amounts commencing on January 1, 2026.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · derivative · entry 7

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 335 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 Class A Common Stock when vested.

F3 · derivative.exercise_date: These RSUs, which were granted on November 12, 2020, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

F3 · derivative.expiration_date: These RSUs, which were granted on November 12, 2020, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · nonDerivative · entry 6

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 185,109

F1 · shares: These shares represent the number of shares of Class A Common Stock withheld by the issuer to satisfy the reporting person's tax withholding obligation upon the vesting of the RSUs reported in this Form 4.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · nonDerivative · entry 5

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 198,050

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.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · nonDerivative · entry 4

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 172,606

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.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · nonDerivative · entry 3

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 172,022

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.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · nonDerivative · entry 2

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 171,805

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.

SEC source: 0001616707-25-000111 · wk-form4_1759522963.xml · nonDerivative · entry 1

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 171,624

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.

SEC source: 0001616707-25-000109 · wk-form4_1759522862.xml · derivative · entry 6

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 30,624 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Class A Common Stock when vested.

F5 · derivative.exercise_date: These RSUs, which were granted on September 22, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

F5 · derivative.expiration_date: These RSUs, which were granted on September 22, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

SEC source: 0001616707-25-000109 · wk-form4_1759522862.xml · derivative · entry 5

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,066

Underlying: Class A Common Stock · 1,636 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Class A Common Stock when vested.

F4 · derivative.exercise_date: These RSUs, which were granted on April 18, 2022, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 1,635 shares will vest on January 1, 2026, 1,636 shares will vest on April 1, 2026, and an aggregate amount of 4,795 shares will vest in substantially equal quarterly amounts commencing July 1, 2026.

F4 · derivative.expiration_date: These RSUs, which were granted on April 18, 2022, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 1,635 shares will vest on January 1, 2026, 1,636 shares will vest on April 1, 2026, and an aggregate amount of 4,795 shares will vest in substantially equal quarterly amounts commencing July 1, 2026.

SEC source: 0001616707-25-000109 · wk-form4_1759522862.xml · nonDerivative · entry 3

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,909

F1 · shares: These shares represent the number of shares of Class A Common Stock withheld by the issuer to satisfy the reporting person's tax withholding obligation upon the vesting of the RSUs reported in this Form 4.

SEC source: 0001616707-25-000109 · wk-form4_1759522862.xml · nonDerivative · entry 2

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,260

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.

SEC source: 0001616707-25-000109 · wk-form4_1759522862.xml · nonDerivative · entry 1

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,636

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.

SEC source: 0001616707-25-000107 · wk-form4_1759522744.xml · derivative · entry 9

Blotner Jon · CIK 0001994593 · Pres., Commercial & Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 26,145 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 Class A Common Stock when vested.

F6 · derivative.exercise_date: These RSUs, which were granted on September 22, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

F6 · derivative.expiration_date: These RSUs, which were granted on September 22, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on October 1, 2025.

SEC source: 0001616707-25-000107 · wk-form4_1759522744.xml · derivative · entry 8

Blotner Jon · CIK 0001994593 · Pres., Commercial & Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,091

Underlying: Class A Common Stock · 181 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 Class A Common Stock when vested.

F5 · derivative.exercise_date: These RSUs, which were granted in multiple awards on April 18, 2022, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 181 shares will vest on each of January 1, 2026 and April 1, 2026, and an aggregate amount of 729 shares will vest in substantially equal quarterly amounts commencing July 1, 2026.

F5 · derivative.expiration_date: These RSUs, which were granted in multiple awards on April 18, 2022, vest upon the satisfaction of a service condition and have no expiration date. With respect to the number of shares that have not vested, subject to continued service on each applicable vesting date, 181 shares will vest on each of January 1, 2026 and April 1, 2026, and an aggregate amount of 729 shares will vest in substantially equal quarterly amounts commencing July 1, 2026.