X0306 4 2019-05-08 0001632127 Cable One, Inc. CABO 0001501808 Weymouth Katharine C/O CABLE ONE, INC. 210 E. EARLL DRIVE PHOENIX AZ 85012 1 Common Stock, par value $0.01 2019-05-08 4 M 0 201 A 456 D Restricted Stock Unit (RSU) 2019-05-08 4 M 0 201 0 D Common Stock, par value $0.01 201 0 D Restricted stock units convert into Common Stock on a one-for-one basis. On May 8, 2018, the Reporting Person was granted this award of restricted stock units, which vested in full on May 8, 2019. Shares of Common Stock were delivered to the Reporting Person upon vesting of the restricted stock units or, if applicable, as per the terms of the Reporting Person's deferral election. /s/ Peter N. Witty for Katharine B. Weymouth 2019-05-10