X0609 4 2026-10-15 0 0001616707 Wayfair Inc. W 0001620052 Conine Steven false C/O WAYFAIR INC., 4 COPLEY PLACE BOSTON MA 02116 1 0 0 0 1 Class A Common Stock 2026-10-15 4 S 0 49266 110.36 D 172807 D Class A Common Stock 2026-10-15 4 S 0 46157 111.64 D 126650 D Class A Common Stock 2026-10-15 4 S 0 21577 112.47 D 105073 D Class A Common Stock 22857 I See Footnote The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.00 to $110.99, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $111.00 to $111.99, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $112.00 to $112.92, 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. Represents shares directly owned by SK Ventures LLC, of which the reporting person is a member and may be deemed to be a beneficial owner. /s/ Enrique Colbert, Attorney-in-Fact for Steven Conine 2026-10-19