W

SEC source: 0001616707-26-000051 · wk-form4_1774041163.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,549

Underlying: Class A Common Stock · 18,549 shares

Expires not disclosed

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Class A Common Stock when vested.

F2 · derivative.exercise_date: These RSUs vest upon the satisfaction of a service condition and have no expiration date. The service condition will be fully satisfied on April 1, 2026.

F2 · derivative.expiration_date: These RSUs vest upon the satisfaction of a service condition and have no expiration date. The service condition will be fully satisfied on April 1, 2026.

SEC source: 0001616707-26-000049 · wk-form4_1772835466.xml · nonDerivative · entry 1

Frost Diana · CIK 0002006401 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,304

F1 · shares: Each share of Class A Common Stock is issuable upon the vesting of a restricted stock unit ("RSU"). The RSUs vest upon the satisfaction of a service condition. The service condition is satisfied as to 1/4th of the shares on May 1, 2026 and as to an additional 1/4th of the shares for each three-month period of continuous service thereafter.

SEC source: 0001616707-26-000047 · wk-form4_1772835359.xml · nonDerivative · entry 1

NAYLOR JEFFREY G · CIK 0001191210 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,052

F1 · shares: Each share of Class A Common Stock is issuable upon the vesting of a restricted stock unit ("RSU"). The RSUs vest upon the satisfaction of a service condition. The service condition is satisfied as to 1/4th of the shares on May 1, 2026 and as to an additional 1/4th of the shares for each three-month period of continuous service thereafter.

SEC source: 0001616707-26-000045 · wk-form4_1772835249.xml · nonDerivative · entry 1

Kumin Michael Andrew · CIK 0001368414 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 263,753

F1 · shares: Each share of Class A Common Stock is issuable upon the vesting of a restricted stock unit ("RSU"). The RSUs vest upon the satisfaction of a service condition. The service condition is satisfied as to 1/4th of the shares on May 1, 2026 and as to an additional 1/4th of the shares for each three-month period of continuous service thereafter.

F2 · balance_after: Includes 160 shares held in a separately managed account for the benefit of the reporting person.

SEC source: 0001616707-26-000083 · wk-form4a_1774993495.xml · nonDerivative · entry 3

Kumin Michael Andrew · CIK 0001368414 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 319,753

F3 · shares: Each share of Class A Common Stock is issuable upon the vesting of a restricted stock unit ("RSU"). The RSUs vest upon the satisfaction of a service condition. The service condition is satisfied as to 1/4th of the shares on May 1, 2026 and as to an additional 1/4th of the shares for each three-month period of continuous service thereafter.

F4 · balance_after: Includes 160 shares held in a separately managed account for the benefit of the reporting person.

F5 · balance_after: The amount of securities beneficially owned directly by the reporting person in his individual capacity has been amended to reflect the beneficial ownership following the transfer from TOF Capital.

SEC source: 0001616707-26-000035 · wk-form4_1772228893.xml · nonDerivative · entry 4

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

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 $80.00 to $80.73, 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: 0001616707-26-000035 · wk-form4_1772228893.xml · nonDerivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 171,435

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 $79.00 to $79.98, 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: 0001616707-26-000035 · wk-form4_1772228893.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 179,121

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 $78.00 to $78.99, 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: 0001616707-26-000035 · wk-form4_1772228893.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 195,037

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 $77.00 to $77.64, 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: 0001616707-26-000037 · wk-form4_1772229038.xml · nonDerivative · entry 4

Conine Steven · CIK 0001620052 · Director · Co-Founder

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 $80.02 to $80.79, 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: 0001616707-26-000037 · wk-form4_1772229038.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 171,273

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 $79.00 to $79.93, 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: 0001616707-26-000037 · wk-form4_1772229038.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 179,588

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 $78.00 to $78.99, 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: 0001616707-26-000037 · wk-form4_1772229038.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 194,423

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 $77.00 to $77.65, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 8

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 196,137

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.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.14 to $81.15, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 7

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 196,937

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 $80.03 to $80.79, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 6

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 198,148

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 $78.39 to $79.32, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 5

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 199,199

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 $77.19 to $78.15, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 4

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 206,419

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 $76.19 to $77.18, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 211,110

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 $75.19 to $76.11, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 214,610

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 $74.18 to $75.16, 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: 0001616707-26-000031 · wk-form4_1772059043.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 229,114

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 $73.18 to $74.17, 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: 0001616707-26-000033 · wk-form4_1772059168.xml · nonDerivative · entry 7

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 196,023

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 $80.48 to $81.15, 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: 0001616707-26-000033 · wk-form4_1772059168.xml · nonDerivative · entry 6

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 197,866

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 $79.21 to $80.10, 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: 0001616707-26-000033 · wk-form4_1772059168.xml · nonDerivative · entry 5

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 198,966

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 $77.46 to $78.40, 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: 0001616707-26-000033 · wk-form4_1772059168.xml · nonDerivative · entry 4

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 203,359

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 $76.45 to $77.44, 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: 0001616707-26-000033 · wk-form4_1772059168.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 210,593

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 $75.23 to $76.20, 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: 0001616707-26-000033 · wk-form4_1772059168.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 214,085

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 $74.21 to $75.20, 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: 0001616707-26-000033 · wk-form4_1772059168.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 228,867

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 $73.21 to $74.20, 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: 0001616707-26-000029 · wk-form4_1772058087.xml · nonDerivative · entry 2

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 211,698

F1 · 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: 0001616707-26-000029 · wk-form4_1772058087.xml · nonDerivative · entry 1

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · 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: 0002006401-26-000002 · wk-form4_1770241128.xml · nonDerivative · entry 1

Frost Diana · CIK 0002006401 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,128

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: 0001616707-26-000008 · wk-form4_1769551765.xml · nonDerivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

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 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 $109.69 to $110.09, 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: 0001616707-26-000008 · wk-form4_1769551765.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 296,998

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 $108.69 to $109.68, 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: 0001616707-26-000008 · wk-form4_1769551765.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 372,192

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 $107.68 to $108.67, 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: 0001616707-26-000011 · wk-form4_1769551899.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director · Co-Founder

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 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 $109.69 to $109.99, 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: 0001616707-26-000011 · wk-form4_1769551899.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 297,057

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 $108.69 to $109.68, 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: 0001616707-26-000011 · wk-form4_1769551899.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director · Co-Founder

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 371,465

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.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.68 to $108.66, 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: 0001867558-26-000002 · wk-form4_1768521256.xml · nonDerivative · entry 1

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 200,328

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: 0001616707-26-000004 · wk-form4_1767661461.xml · nonDerivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 106,107

F2 · 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 12, 2025.

SEC source: 0001616707-26-000002 · wk-form4_1767661394.xml · nonDerivative · entry 6

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 149,238

F2 · 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: 0001616707-26-000004 · wk-form4_1767661461.xml · derivative · entry 8

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 18,702 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.

F6 · derivative.exercise_date: These RSUs, which were granted on December 21, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on January 1, 2026.

F6 · derivative.expiration_date: These RSUs, which were granted on December 21, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on January 1, 2026.

SEC source: 0001616707-26-000004 · wk-form4_1767661461.xml · derivative · entry 7

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 910

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.

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 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 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 April 1, 2026, and an aggregate amount of 729 shares will vest in substantially equal quarterly amounts commencing July 1, 2026.

SEC source: 0001616707-26-000004 · wk-form4_1767661461.xml · derivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 980

Underlying: Class A Common Stock · 326 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 in multiple awards 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, 327 shares will vest on April 1, 2026, 326 shares will vest on July 1, 2026, and 327 shares will vest on October 1, 2026.

F4 · derivative.expiration_date: These RSUs, which were granted in multiple awards 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, 327 shares will vest on April 1, 2026, 326 shares will vest on July 1, 2026, and 327 shares will vest on October 1, 2026.

SEC source: 0001616707-26-000004 · wk-form4_1767661461.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 111,104

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: 0001616707-26-000004 · wk-form4_1767661461.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 120,065

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: 0001616707-26-000004 · wk-form4_1767661461.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 101,363

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: 0001616707-26-000004 · wk-form4_1767661461.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 101,182

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: 0001616707-26-000006 · wk-form4_1767661544.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 · 21,641 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 December 21, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on January 1, 2026.

F5 · derivative.expiration_date: These RSUs, which were granted on December 21, 2025, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on January 1, 2026.

SEC source: 0001616707-26-000006 · wk-form4_1767661544.xml · derivative · entry 5

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,431

Underlying: Class A Common Stock · 1,635 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, 1,636 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, 1,636 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: 0001616707-26-000006 · wk-form4_1767661544.xml · nonDerivative · entry 3

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,370

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.