X0508 4 2024-12-16 0001611983 Liberty Broadband Corp LBRDA 0001099636 MAFFEI GREGORY B 12300 LIBERTY BLVD. ENGLEWOOD CO 80112 1 1 1 President/CEO 0 Series C Common Stock 2024-12-16 4 M 0 1500000.0000 48.1000 A 2898513.0000 D Series C Common Stock 2024-12-16 4 S 0 71500.0000 81.9958 D 2827013.0000 D Series C Common Stock 2024-12-16 4 F 0 1146767.0000 82.4500 D 1680246.0000 D Series C Common Stock 2024-12-17 4 S 0 1165.0000 81.2988 D 1679081.0000 D Series C Common Stock 2024-12-17 4 S 0 118825.0000 80.6048 D 1560256.0000 D Series C Common Stock 274990.0000 I Maven 2016 - 1 GRAT Series C Common Stock 137683.0000 I Maven 2017 - 1 GRAT Stock Option - LBRDK (Right to Buy) 48.1000 2024-12-16 4 M 0 1500000.0000 0.0000 D 2024-12-17 Series C Common Stock 1500000.0000 0.0000 D Includes the distribution to the reporting person's direct holdings of 100 shares of the Issuer's Series C common stock on June 26, 2023, by the Maven 2017-1 GRAT; 160,962 shares of the Issuer's Series C common stock on February 29, 2024, by the Maven 2016-1 GRAT; and 118,320 shares of the Issuer's Series C common stock on June 26, 2024, by the Maven 2017-1 GRAT. The price is a weighted average price. These shares were sold in multiple transactions ranging from $81.55 to $82.52, 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 price is a weighted average price. These shares were sold in multiple transactions ranging from $81.235 to $81.415, 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 price is a weighted average price. These shares were sold in multiple transactions ranging from $81.220 to $81.190, 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. Includes the distribution to the reporting person's direct holdings of 160,962 shares of the Issuer's Series C common stock on February 29,2024 by the Maven 2016-1 GRAT. The reporting person is the sole trustee of the grantor retained annuity trust, for the benefit of himself, his spouse and his children. Includes the distribution to the reporting person's direct holdings of (i) 100 shares of the Issuer's Series C common stock on June 26, 2023, by the Maven 2017-1 GRAT. and (ii) 118,320 shares of the Issuer's Series C common stock on June 26, 2024, by the Maven 2017-1 GRAT. These options vested 50% on December 17, 2018, and 50% on December 17, 2019. /s/ Katherine C. Jewell as Attorney-in-Fact for Gregory B. Maffei 2024-12-18