W

SEC source: 0001616707-26-000101 · wk-form4_1777325295.xml · nonDerivative · entry 5

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 436,212

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.

SEC source: 0001616707-26-000101 · wk-form4_1777325295.xml · nonDerivative · entry 4

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 436,963

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 $78.84 to $79.57, 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: 0001616707-26-000101 · wk-form4_1777325295.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 441,203

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 $77.77 to $78.69, 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: 0001616707-26-000101 · wk-form4_1777325295.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 479,713

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 $76.77 to $77.76, 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: 0001616707-26-000101 · wk-form4_1777325295.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 532,352

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 $75.77 to $76.76, 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: 0001616707-26-000091 · wk-form4_1776805392.xml · derivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,634,496

Underlying: Class A Common Stock · 500,000 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: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

F1 · derivative.exercise_date: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

F1 · derivative.expiration_date: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

SEC source: 0001616707-26-000091 · wk-form4_1776805392.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 549,137

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: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

SEC source: 0001616707-26-000093 · wk-form4_1776805508.xml · derivative · entry 3

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,633,304

Underlying: Class A Common Stock · 500,000 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: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

F1 · derivative.exercise_date: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

F1 · derivative.expiration_date: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

SEC source: 0001616707-26-000093 · wk-form4_1776805508.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 549,073

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: On April 20, 2026, the reporting person converted, at his election, 500,000 shares of his Class B Common Stock into Class A Common Stock. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date.

SEC source: 0001616707-26-000085 · wk-form4_1775249448.xml · nonDerivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 111,158

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: 0001616707-26-000089 · wk-form4_1775249577.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 · 21,457 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 March 18, 2026, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on April 1, 2026.

F5 · derivative.expiration_date: These RSUs, which were granted on March 18, 2026, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on April 1, 2026.

SEC source: 0001616707-26-000089 · wk-form4_1775249577.xml · derivative · entry 5

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,795

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, an aggregate amount of 4,795 shares will vest in four 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, an aggregate amount of 4,795 shares will vest in four substantially equal quarterly amounts commencing July 1, 2026.

SEC source: 0001616707-26-000089 · wk-form4_1775249577.xml · nonDerivative · entry 3

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,366

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: 0001616707-26-000089 · wk-form4_1775249577.xml · nonDerivative · entry 2

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,093

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: 0001616707-26-000089 · wk-form4_1775249577.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: 0001616707-26-000087 · wk-form4_1775249525.xml · derivative · entry 9

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 · 17,848 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 March 18, 2026, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on April 1, 2026.

F6 · derivative.expiration_date: These RSUs, which were granted on March 18, 2026, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on April 1, 2026.

SEC source: 0001616707-26-000087 · wk-form4_1775249525.xml · derivative · entry 8

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,712

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.

F5 · 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, an aggregate amount of 1,712 shares will vest in four substantially equal quarterly amounts commencing July 1, 2026.

F5 · 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, an aggregate amount of 1,712 shares will vest in four substantially equal quarterly amounts commencing July 1, 2026.

SEC source: 0001616707-26-000087 · wk-form4_1775249525.xml · derivative · entry 7

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 875

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.

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, an aggregate amount of 875 shares will vest in four 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, an aggregate amount of 875 shares will vest in four substantially equal quarterly amounts commencing July 1, 2026.

SEC source: 0001616707-26-000087 · wk-form4_1775249525.xml · derivative · entry 6

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 784

Underlying: Class A Common Stock · 392 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 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, 392 shares will vest on July 1, 2026 and 392 shares will vest on October 1, 2026.

F3 · 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, 392 shares will vest on July 1, 2026 and 392 shares will vest on October 1, 2026.

SEC source: 0001616707-26-000087 · wk-form4_1775249525.xml · nonDerivative · entry 5

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 159,071

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: 0001616707-26-000087 · wk-form4_1775249525.xml · nonDerivative · entry 4

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 168,279

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: 0001616707-26-000087 · wk-form4_1775249525.xml · nonDerivative · entry 3

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,431

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: 0001616707-26-000087 · wk-form4_1775249525.xml · nonDerivative · entry 2

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,847

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: 0001616707-26-000087 · wk-form4_1775249525.xml · nonDerivative · entry 1

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,630

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: 0001616707-26-000085 · wk-form4_1775249448.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 · 18,549 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 March 18, 2026, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on April 1, 2026.

F6 · derivative.expiration_date: These RSUs, which were granted on March 18, 2026, vest upon the satisfaction of a service condition and have no expiration date. The service condition was fully satisfied on April 1, 2026.

SEC source: 0001616707-26-000085 · wk-form4_1775249448.xml · derivative · entry 7

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 729

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

SEC source: 0001616707-26-000085 · wk-form4_1775249448.xml · derivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 653

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

SEC source: 0001616707-26-000085 · wk-form4_1775249448.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 115,948

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: 0001616707-26-000085 · wk-form4_1775249448.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 125,164

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: 0001616707-26-000085 · wk-form4_1775249448.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 106,615

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: 0001616707-26-000085 · wk-form4_1775249448.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 106,434

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: 0001616707-26-000097 · wk-form4a_1777324851.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 100

F1 · kind: The previous Form 4 filed in respect of the listed transaction is being amended to indicate that on April 1, 2026, the reporting person's spouse received 100 shares from an inherited IRA account. As a result, the reporting person became an indirect beneficial owner of such shares.

F2 · ownership.nature: Represents shares directly owned by the reporting person's spouse, of which the reporting person is deemed a beneficial owner.

SEC source: 0001616707-26-000061 · wk-form4_1774559345.xml · nonDerivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 49,137

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 $79.00 to $79.81, 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: 0001616707-26-000061 · wk-form4_1774559345.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 54,205

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 $78.01 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: 0001616707-26-000061 · wk-form4_1774559345.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,736

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 $77.06 to $77.98, 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: 0001616707-26-000063 · wk-form4_1774559397.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 49,073

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 $79.01 to $79.68, 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: 0001616707-26-000063 · wk-form4_1774559397.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 54,151

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 $78.07 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: 0001616707-26-000063 · wk-form4_1774559397.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,567

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 $77.02 to $77.91, 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: 0001616707-26-000059 · wk-form4_1774476661.xml · nonDerivative · entry 5

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,748

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 $77.00 to $77.55, 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: 0001616707-26-000057 · wk-form4_1774476564.xml · nonDerivative · entry 5

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,467

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 $77.00 to $77.45, 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: 0001616707-26-000059 · wk-form4_1774476661.xml · nonDerivative · entry 4

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 61,319

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 $78.01 to $78.91, 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: 0001616707-26-000059 · wk-form4_1774476661.xml · nonDerivative · entry 3

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 84,858

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 $77.00 to $77.99, 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: 0001616707-26-000059 · wk-form4_1774476661.xml · nonDerivative · entry 2

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 116,945

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 $76.00 to $76.99, 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: 0001616707-26-000059 · wk-form4_1774476661.xml · nonDerivative · entry 1

Shah Niraj · CIK 0001620093 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 167,143

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 $75.01 to $75.99, 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: 0001616707-26-000057 · wk-form4_1774476564.xml · nonDerivative · entry 4

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 61,154

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.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.02 to $78.91, 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: 0001616707-26-000057 · wk-form4_1774476564.xml · nonDerivative · entry 3

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 85,118

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 $77.00 to $77.96, 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: 0001616707-26-000057 · wk-form4_1774476564.xml · nonDerivative · entry 2

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 117,163

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 $76.00 to $76.99, 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: 0001616707-26-000057 · wk-form4_1774476564.xml · nonDerivative · entry 1

Conine Steven · CIK 0001620052 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 166,911

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 $75.00 to $75.99, 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: 0001616707-26-000055 · wk-form4_1774041348.xml · derivative · entry 1

Tan Fiona · CIK 0001867558 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,457

Underlying: Class A Common Stock · 21,457 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: 0001616707-26-000053 · wk-form4_1774041256.xml · derivative · entry 1

Gulliver Kate · CIK 0001950170 · CFO and Chief Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,848

Underlying: Class A Common Stock · 17,848 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.