X0508 4 2026-01-03 0 0001632127 Cable One, Inc. CABO 0002044745 Arntzen Christopher J C/O CABLE ONE, INC. 210 E. EARLL DRIVE PHOENIX AZ 85012 0 1 0 0 SVP, GC & Secretary 0 Common Stock, par value $0.01 2026-01-03 4 F 0 161 104.16 D 1883 D Phantom RSUs 2026-01-03 4 A 0 4992 0 A Common Stock, par value $0.01 4992 4992 D Phantom PSUs 2026-01-03 4 A 0 7488 0 A Common Stock, par value $0.01 7488 7488 D See Remarks. Each phantom service-based restricted stock unit (a Phantom RSU) and each phantom performance-based restricted stock unit (a Phantom PSU) represents a contingent right to receive the economic value of one share of Common Stock, with each solely settled in cash. Represents a grant of 4,992 Phantom RSUs on January 3, 2026, which generally vest in substantially equal installments on each of the first three anniversaries of the grant date, subject to the Reporting Persons continued employment through the applicable vesting date. Represents a grant of 7,488 Phantom PSUs on January 3, 2026, that vest based on target achievement of applicable performance goals over the three-year performance period commencing January 1, 2026 and ending December 31, 2028, subject to certification of performance achievement by the Compensation and Talent Management Committee of Cable One, Inc. and the Reporting Persons continued employment through the date of such certification. Represents the withholding of shares of Common Stock to satisfy tax withholding liability associated with the vesting of (i) restricted stock awards from previously reported grants, which were granted on January 3, 2022 which generally vest in four equal installments on each of the first four anniversaries of the respective date of grant, subject to the Reporting Person's continued employment with Cable One, Inc. through each such date, and (ii) restricted stock units from previously reported grants, which were granted on January 3, 2023 and 2025, which generally vest in three equal installments on each of the first three anniversaries of the date of grant, subject to the Reporting Person's continued employment with Cable One, Inc. through each such date, and (iii) restricted stock units from previously reported grants, which were granted on January 3, 2024, which generally vest in two equal installments on each of the first two anniversaries of the date of grant, subject to the Reporting Person's continued employment with Cable One, Inc. through each such date. /s/ Christopher J. Arntzen 2026-01-06