X0306 4 2018-05-14 0001326801 Facebook Inc FB 0001621141 Koum Jan C/O FACEBOOK, INC. 1601 WILLOW ROAD MENLO PARK CA 94025 1 Class A Common Stock 2018-05-08 5 J 0 E 1319927 0 D 922953 I By Jan Koum and BNY Mellon Trust of Delaware, Co-Trustees of The Jan Koum Trust IX U/A/D 4/13/2016 Class A Common Stock 2018-05-08 5 J 0 E 1319927 0 A 5568266 I By Jan Koum, Trustee of The Butterfly Trust U/A/D 1/20/2004 Class A Common Stock 2018-05-08 5 J 0 E 922953 0 D 0 I By Jan Koum and BNY Mellon Trust of Delaware, Co-Trustees of The Jan Koum Trust IX U/A/D 4/13/2016 Class A Common Stock 2018-05-08 5 J 0 E 922953 0 A 922953 I By BNY Mellon Trust of Delaware, Trustee of The Jan Koum Family Trust III U/A/D 4/13/2016 Class A Common Stock 2018-05-14 4 S 0 8495 186.8782 D 5260792 I By BNY Mellon Trust of Delaware, Trustee of The Jan Koum Family Trust II U/A/D 2/4/2015 Class A Common Stock 2018-05-14 4 S 0 2200 187.537 D 5258592 I By BNY Mellon Trust of Delaware, Trustee of The Jan Koum Family Trust II U/A/D 2/4/2015 Class A Common Stock 2018-05-15 4 M 0 2485346 0 A 8053612 I By Jan Koum, Trustee of The Butterfly Trust U/A/D 1/20/2004 Class A Common Stock 2018-05-15 4 F 0 1232235 186.64 D 6821377 I By Jan Koum, Trustee of The Butterfly Trust U/A/D 1/20/2004 Class A Common Stock 2018-05-16 4 S 0 1076220 183.3397 D 5745157 I By Jan Koum, Trustee of The Butterfly Trust U/A/D 1/20/2004 Class A Common Stock 2018-05-16 4 S 0 176891 183.9029 D 5568266 I By Jan Koum, Trustee of The Butterfly Trust U/A/D 1/20/2004 Restricted Stock Units (RSU) (Class A) 2018-05-15 4 M 0 2485346 0 D 2024-11-16 Class A Common Stock 2485346 4556470 D Represents a transfer of shares from Jan Koum and BNY Mellon Trust of Delaware, Co-Trustees of The Jan Koum Trust IX U/A/D 4/13/2016 to Jan Koum, Trustee of The Butterfly Trust U/A/D 1/20/2004. The reporting person remains the beneficial owner of all of the shares after the transfer. Shares held of record by Jan Koum and BNY Mellon Trust of Delaware, Co-Trustees of The Jan Koum Trust IX U/A/D 4/13/2016. Shares held of record by Jan Koum, Trustee of The Butterfly Trust U/A/D 1/20/2004. Represents a transfer of shares from Jan Koum and BNY Mellon Trust of Delaware, Co-Trustees of The Jan Koum Trust IX U/A/D 4/13/2016 to BNY Mellon Trust of Delaware, Trustee of The Jan Koum Family Trust III U/A/D 4/13/2016. Shares held of record by BNY Mellon Trust of Delaware, Trustee of The Jan Koum Family Trust III U/A/D 4/13/2016. The reporting person exercises voting and dispositive powers over these shares, but has no pecuniary interest in these shares. 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 $186.32 to $187.31 per share, inclusive. The holder 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 BNY Mellon Trust of Delaware, Trustee of The Jan Koum Family Trust II U/A/D 2/4/2015. The reporting person exercises voting and dispositive powers over these shares, but has no pecuniary interest in these shares. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.36 to $187.74 per share, inclusive. The holder 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 the number of shares of Class A Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the Restricted Stock Units ("RSUs") listed in Table II and does not represent a sale by the reporting person. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.79 to $183.78 per share, inclusive. The holder 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 $183.79 to $184.30 per share, inclusive. The holder 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. Each RSU represents a contingent right to receive 1 share of the issuer's Class A Common Stock upon settlement. The RSUs vest as to (a) 13/60th of the total shares on November 15, 2015, (b) 1/20th of the total shares each quarter thereafter through November 15, 2017, (c) 2/20th of the total shares on each of February 15, 2018, May 15, 2018 and August 15, 2018 and (d) the final 5/60th of the total shares on November 15, 2018; provided, however, that in the event of the reporting person's termination of employment with the issuer under certain circumstances, all of the reporting person's then unvested RSUs shall vest as of the date of such termination of employment. /s/ Michael Johnson as attorney-in-fact for Jan Koum 2018-05-16