X0508 4 2026-01-01 0 0001616707 Wayfair Inc. W 0001994593 Blotner Jon C/O WAYFAIR INC., 4 COPLEY PLACE BOSTON MA 02116 0 1 0 0 Pres., Commercial & Operations 1 Class A Common Stock 2026-01-01 4 M 0 326 0 A 101182 D Class A Common Stock 2026-01-01 4 M 0 181 0 A 101363 D Class A Common Stock 2026-01-01 4 M 0 18702 0 A 120065 D Class A Common Stock 2026-01-01 4 F 0 8961 106.56 D 111104 D Class A Common Stock 2026-01-05 4 S 0 4997 105.84 D 106107 D Restricted Stock Units ("RSUs") 2026-01-01 4 M 0 326 0 D Class A Common Stock 326 980 D Restricted Stock Units ("RSUs") 2026-01-01 4 M 0 181 0 D Class A Common Stock 181 910 D Restricted Stock Unit ("RSU") 2026-01-01 4 M 0 18702 0 D Class A Common Stock 18702 0 D 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. 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. Each RSU represents a contingent right to receive one share of Class A Common Stock when vested. 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. 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. 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. /s/ Enrique Colbert, Attorney-In-Fact for Jon Blotner 2026-01-05