X0306 4 2019-12-16 0001632127 Cable One, Inc. CABO 0001018401 GRAHAM DONALD C/O GRAHAM HOLDINGS COMPANY 1300 NORTH 17TH STREET ARLINGTON VA 22209 true Common Stock; par value $0.01 18194 D Common Stock; par value $0.01 112013 I Revocable Trust Common Stock; par value $0.01 2019-12-16 4 J 0 96276 0 D 0 I Trusts for Siblings Common Stock; par value $0.01 2019-12-16 4 J 0 6000 0 D 3800 I Trusts for Children Common Stock; par value $0.01 2019-12-16 4 J 0 1800 0 D 1044 I Trusts for Children of Siblings Common Stock; par value $0.01 5000 I Trusts for Third Party Common Stock; par value $0.01 388225 I Beneficiary of Trusts Common Stock; par value $0.01 15 I By spouse The reporting person was a trustee of the 1939 Residuary Trust f/b/o Stephen M. Graham u/a/d 6/24/39, 1939 Residuary Trust f/b/o Elizabeth G. Weymouth u/a/d 6/24/39, 1969 Trust f/b/o Elizabeth G. Weymouth and 1973 Trust f/b/o Stephen M. Graham, which hold 7,338, 29,363, 40,250 and 19,325 shares of Common Stock, respectively, but he is not a beneficiary of such trusts. As of December 16, 2019, the reporting person resigned from his position as trustee. The reporting person was a trustee of the Elizabeth K. Graham Trust No. 1 u/a/d 9/13/10, Laura G. O'Shaughnessy Trust No. 1 u/a/d 9/13/10, Mary L. Graham Trust No. 1 u/a/d 9/13/10 and William W. Graham Trust No. 1 u/a/d 9/13/10, which hold 1,500, 1,500, 1,500 and 1,500 shares of Common Stock, respectively, but he is not a beneficiary of such trusts. As of December 16, 2019, the reporting person resigned from his position as trustee. The reporting person is a trustee of the trusts that own the reported securities, but he is not a beneficiary of such trusts. The reporting person disclaims beneficial ownership of the reported securities. The reporting person was a trustee of the Thomas W. Graham Art. THIRD (i) Trust u/a/d 6/24/39 and Juliet Graham Art. THIRD (i) Trust u/a/d 6/24/39, which hold 900 and 900 shares of Common Stock, respectively, but he is not a beneficiary of such trusts. As of December 16, 2019, the reporting person resigned from his position as trustee. The reporting person disclaims beneficial ownership of the reported securities. /s/ Nicole M. Maddrey for Donald E. Graham 2019-12-18