X0206 3 2015-11-18 0 0001616707 Wayfair Inc. W 0001485992 HarbourVest Partners IX-Venture Fund L.P. C/O OF HARBOURVEST PARTNERS LLC ONE FINANCIAL CENTER, 44TH FLOOR BOSTON MA 02111 0 0 0 1 See remarks 0001659078 HarbourVest IX-Venture Associates L.P. C/O HARBOURVEST PARTNERS LLC ONE FINANCIAL CENTER, 44TH FLOOR BOSTON MA 02110 0 0 0 1 See remarks 0001659259 HarbourVest IX-Venture Associates LLC C/O HARBOURVEST PARTNERS LLC ONE FINANCIAL CENTER, 44TH FLOOR BOSTON MA 02110 0 0 0 1 See remarks Class A Common Stock 16275 D The securities are owned solely by HarbourVest Partners IX-Venture Fund L.P. ("HV9"). HarbourVest IX-Associates LLC, which is the general partner of HarbourVest IX-Associates L.P. which is the general partner of HarbourVest Partners IX-Venture Fund L.P. may be deemed to have a beneficial interest in the securities held by HV9 and each disclaims beneficial ownership of the securities held by HV9, except to the extent of its pecuniary interest which is subject to indeterminable future events. The reporting persons beneficially own less than 10% of the Issuer's Class A Common Stock, which is the class of equity securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the "Exchange Act'). This Form 3 is being filed as a precautionary measure because Ian Lane, a Managing Direct of HarbourVest Partners LLC, serves as a member of the board of directors of the Issuer. The filing of this Form shall not be deemed an admission that the reporting persons are required to file reports pursuant to Section 16 of the Exchange Act. HarbourVest Partners IX-Venture Fund L.P., Harbourvest IX-Venture Associates L.P., its GP; By: HarbourVest IX-Venture Associates LLC, its GP; By: HarbourVest Partners, LLC, its Managing Member; By: /s/ Danielle Green, Chief Compliance Officer 2015-11-24 HarbourVest IX-Venture Associates L.P., By: HarbourVest IX-Venture Associates LLC, its GP; By HarbourVest Partners, LLC, its Managing Member; By: /s/ Danielle Green, Chief Compliance Officer 2015-11-24 Harbourvest IX-Venture Associates LLC; By: HarbourVest Partners, LLC, its Managing Member; By: /s/ Danielle Green, Chief Compliance Officer 2015-11-24