X0306 4 2021-05-10 0 0001537054 Gogo Inc. GOGO 0001206595 CRANDALL ROBERT L 111 N. CANAL STREET, STE 1400 CHICAGO IL 60606 1 0 0 0 Common Stock 2021-05-10 4 P 0 50000 11.439 A 78934 I By Limited Partnership The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $11.40 to $11.45, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. Shares are held directly by RJC Investments Ltd., a Texas Limited Partnership. /s/ Margee Elias, Attorney-in-Fact for Robert L. Crandall 2021-05-12