X0306 4 2017-04-21 0001326801 Facebook Inc FB 0001607459 Cox Christopher K C/O FACEBOOK, INC. 1601 WILLOW ROAD MENLO PARK CA 94025 1 Chief Product Officer Class A Common Stock 2017-04-21 4 S 0 16000 143.95 D 181431 D Class A Common Stock 76945 I By Christopher K. Cox Revocable Trust Class A Common Stock 28816 I By Remainder Interest Trust Created Under The Christopher K. Cox 2009 Annuity Trust Dated 5/29/2009 The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the holder. Shares held of record by Christopher Cox, Trustee of the Christopher K. Cox Revocable Trust. Shares held of record by Remainder Interest Trust Created under the Christopher K. Cox 2009 Annuity Trust dated 5/29/2009, Visra Vichit-Vadakan, Trustee, the beneficiaries of which include the reporting person's children. The reporting person's spouse is trustee of the trust. The reporting person disclaims beneficial ownership of these shares, and the filing of this report is not an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose. /s/ Michael Johnson as attorney-in-fact for Christopher K. Cox 2017-04-21