X0306 4 2019-04-03 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 2019-04-03 4 S 0 58300 175.0158 D 25141 D Class A Common Stock 74107 I Christopher K. Cox 2017 Annuity Trust u/a/d 10/24/2017 Class A Common Stock 125893 I Christopher K. Cox 2018 Annuity Trust II U/A DTD 12/19/2018 Class A Common Stock 74107 I Christopher K. Cox 2018 Annuity Trust III U/A DTD 12/19/2018 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 $175.00 to $175.12 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. 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 Christopher K. Cox, Trustee of The Christopher K. Cox 2018 Annuity Trust II U/A DTD 12/19/2018. Shares held of record by Christopher K. Cox, Trustee of The Christopher K. Cox 2018 Annuity Trust III U/A DTD 12/19/2018. /s/ Michael Johnson as attorney-in-fact for Christopher K. Cox 2019-04-05