X0306 4 2018-09-21 0 0001131227 HORNBECK OFFSHORE SERVICES INC /LA HOS 0001284591 HORNBECK TODD M 103 NORTHPARK BOULEVARD, SUITE 300 COVINGTON LA 70433 1 1 0 0 President & CEO COMMON STOCK 2018-09-21 4 J 0 42511 D 0 I By Limited Partnership COMMON STOCK 2018-09-21 4 J 0 701 A 701 I By Limited Liability Company COMMON STOCK 2018-09-21 4 J 0 16724 A 86724 I By Family Trusts COMMON STOCK 916012 D COMMON STOCK 1650 I By Wife COMMON STOCK 70 I By UTMA custodian for child COMMON STOCK 220 I By IRA A Family Limited Partnership of which the Reporting Person is the general partner of the entity general partner distributed its units to its partners on 9/21/2018. A closely held Limited Liability Company of which the Reporting Person is a General Partner received a distribution of shares from a Family Limited Partnership. Represents shares beneficially owned by Reporting Person through a closely held LLC Family trusts of which the Reporting Person is trustee received a distribution of shares from a Family Limited Partnership. Represents shares beneficially owned by Reporting Person through various family trusts. Includes 500 shares acquired on June 30, 2018 under the Company's employee stock purchase plan. /s/ Beth A. LaBrosse as POA for Todd M. Hornbeck 2018-09-25