X0306 4 2019-09-11 0000808461 GCI LIBERTY, INC. GLIBA 0000905853 DUNCAN RONALD A 12300 LIBERTY BOULEVARD ENGLEWOOD CO 80112 1 Series A Common Stock 2019-09-11 4 S 0 50000.0000 63.7638 D 872217.0000 D Series A Common Stock 2742.0000 I By 401(k) Savings Plan Series A Common Stock 236529.0000 I By 560 Company, Inc. Series A Common Stock 188930.0000 I By GRAT - Ron Duncan 2017 Series A Common Stock 12600.0000 I By Missy, LLC Series A Common Stock 9450.0000 I By Neoma N. Lowndes 2006 Revocable Trust Series A Common Stock 56828.0000 I By Spouse The price is a weighted average price. These shares were sold in multiple transactions ranging from $63.5600 to $64.2266, inclusive. The reporting person undertakes to provide to the Securities and Exchange Commission, the Issuer or any security holder of the Issuer, upon request, full information regarding the number of shares sold at each separate price within the range. The number of shares reported as held in the reporting person's 401(k) is based on a statement from the Plan Administrator dated as of August 31, 2019. The reporting person has a 25% ownership interest in Missy, LLC; his spouse has a 25% ownership interest in Missy, LLC; and the Neoma N. Lowndes 2006 Revocable Trust holds the remaining 50% interest in Missy, LLC. The reporting person's daughter is the 50% beneficiary of this trust. Accordingly, the reporting person may be deemed to be the indirect beneficial owner of certain of the Issuer's securities owned by Missy, LLC. The reporting person disclaims beneficial ownership of these securities, except to the extent of his pecuniary interest therein. The reporting person is the trustee of the Neoma N. Lowndes 2006 Revocable Trust and has sole voting and dispositive power over the shares held by the trust. The reporting person's daughter is the 50% beneficiary of this trust. The reporting person disclaims beneficial ownership of the issuer's shares held by such trust. The reporting person disclaims beneficial ownership of these shares owned by his spouse. /s/ Craig Troyer as Attorney-in-Fact for Ronald A. Duncan 2019-09-13