X0202 SCHEDULE 13G/A 0000807985 XXXXXXXX LIVE 1 Series C GCI Group Common Stock 03/31/2026 0002057463 GCI Liberty, Inc. 36164V800 12300 Liberty Blvd Englewood CO 80112 Rule 13d-1(b) Southeastern Asset Management, Inc. TN 2124.00 1318986.00 2124.00 1318986.00 1321110.00 N 3.68 IA Longleaf Partners Small-Cap Fund MA 0.00 1318986.00 0.00 1318986.00 1318986.00 N 3.68 IV O. Mason Hawkins X1 0.00 0.00 0.00 0.00 0.00 N 0 IN GCI Liberty, Inc. 12300 Liberty Blvd, Englewood, CO, 80112 (1) Southeastern Asset Management, Inc., ("Southeastern") (2) Longleaf Partners Small-Cap Fund, ("Longleaf") (3) Mr. O. Mason Hawkins, ("Mr. Hawkins") For all Reporting Persons: 5100 Poplar Avenue, Suite 2450, Memphis, TN 38137 (1) Southeastern - Tennessee (2) Longleaf - Massachusetts (3) Mr. Hawkins - United States of America N IV IA HC (1) Southeastern - 1321110 (2) Longleaf - 1318986 (3) Mr. Hawkins - 0 From December 31, 2025, to March 31, 2026, there was no change in beneficial ownership. Using the current shares outstanding of 35,853,250, the filing parties own less than 5% of the Series C GCI Group Common Stock. 3.68 (1) Southeastern - 2124 (2) Longleaf - 0 (3) Mr. Hawkins - 0 (1) Southeastern - 1318986 (2) Longleaf - 1318986 (3) Mr. Hawkins - 0 (1) Southeastern - 2124 (2) Longleaf - 0 (3) Mr. Hawkins - 0 (1) Southeastern - 1318986 (2) Longleaf - 1318986 (3) Mr. Hawkins - 0 N Y N Not Applicable. N Not Applicable. N Not Applicable. N Not Applicable. N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Joint Filing Agreement In accordance with Rule 13d-1 (k) under the Securities Exchange Act of 1934, the persons or entities named below agree to the joint filing on behalf of each of them of this Schedule 13G with respect to the Securities of the Issuer and further agree that this joint filing agreement be included as an exhibit to this Schedule 13G. In evidence thereof, the undersigned hereby execute this Agreement as of May 15, 2026. Southeastern Asset Management, Inc. By /s/ Andrew R. McCarroll Andrew R. McCarroll, General Counsel Longleaf Partners Small-Cap Fund By: Southeastern Asset Management, Inc. /s/ Andrew R. McCarroll Andrew R. McCarroll, General Counsel O. Mason Hawkins, Individually /s/ O. Mason Hawkins Southeastern Asset Management, Inc. /s/ Andrew R. McCarroll 05/15/2026 Longleaf Partners Small-Cap Fund /s/ Andrew R. McCarroll 05/15/2026 O. Mason Hawkins /s/ O. Mason Hawkins 05/15/2026