X0306 4 2017-12-07 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 2017-12-07 4 S 0 7303 176.5297 D 48407 D Class A Common Stock 2017-12-07 4 S 0 8697 177.1168 D 39710 D Class A Common Stock 2017-12-11 5 G 0 E 7700 0 D 32010 D Class A Common Stock 200000 I By Christopher K. Cox 2017 Annuity 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. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.97 to $176.96 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $176.98 to $177.38 per share, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Represents shares of Class A Common Stock that were donated as a gift. The reporting person does not exercise voting or investment control, directly or indirectly, over the donated shares following this transfer. Shares held of record by Christopher K. Cox, Trustee of The Christopher K. Cox 2017 Annuity Trust u/a/d 10/24/2017. Shares held of record by Visra Vichit-Vadakan, Trustee of the Remainder Interest Trust under the Christopher K. Cox 2009 Annuity Trust u/a/d 5/29/2009, 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 2017-12-11