X0306 4 2019-02-06 0 0001131227 HORNBECK OFFSHORE SERVICES INC /LA HOS 0001284592 HARP JAMES O JR 103 NORTHPARK BOULEVARD, SUITE 300 COVINGTON LA 70433 0 1 0 0 Executive Vice President & CFO COMMON STOCK 2019-02-06 4 M 0 69436 A 409022 D COMMON STOCK 2019-02-06 4 D 0 69436 1.39 D 339586 D COMMON STOCK 12784 I By IRA PHANTOM STOCK 2019-02-06 4 M 0 69436 D COMMON STOCK 69436 138873 D Represents the one-third vesting and cash settlement of a time-vest phantom restricted stock unit award with a Grant Date of February 6, 2018. Each phantom unit is the economic equivalent of one share of the Company's Common Stock. The phantom shares are payable in cash or stock at the election of the Company. Cash awards are based on a 10 day trailing average of the market price of the Company's stock on the vesting date. No shares were actually issued, converted, or sold in connection with this transaction. Includes 500 shares acquired under the Company's employee stock purchase plan on June 30, 2018 and 500 shares acquired under the Company's employee stock purchase plan on December 31, 2018. /s/ Beth A. LaBrosse as POA for James O. Harp 2019-02-08