X0306 4 2022-10-17 0 0001433195 APPFOLIO INC APPF 0000938333 DUCA MAURICE J C/O IGSB, INC. 1485 E. VALLEY ROAD, SUITE H SANTA BARBARA CA 93108 0 0 1 0 Class A Common Stock 2022-10-17 4 S 0 11832 103.52 D 66565 D Class A Common Stock 2022-10-17 4 S 0 4065 104.39 D 62500 D Class A Common Stock 2022-10-17 4 S 0 300 105.07 D 62200 D Class A Common Stock 2022-10-18 4 S 0 2217 105.18 D 59983 D Class A Common Stock 194037 I By Pension Trust Class A Common Stock 9805 I By IGSB Cardinal Core BV, LLC Class A Common Stock 34753 I By Private Foundation Sales made pursuant to a 10(b)5-1 trading plan previously adopted by the Reporting Person on September 15, 2022 . This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $103.00 to $103.99, 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 sold at each separate price within the range set forth in this footnote. This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $104.00 to $104.95, 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 sold at each separate price within the range set forth in this footnote. This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $105.00 to $105.10, 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 sold at each separate price within the range set forth in this footnote. This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $105.00 to $105.50, 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 sold at each separate price within the range set forth in this footnote. The Reporting Person is sole trustee of the pension trust and, in that capacity, possesses sole voting and sole dispositive power over these Class A Shares; however, the Reporting Person does not have and disclaims any pecuniary interest in these shares of Class A Common Stock ("Class A Shares"). The Reporting Person is the managing member of IGSB Cardinal Core BV, LLC and, in that capacity, possesses sole voting and sole dispositive power over these Class A Shares. However, he disclaims beneficial ownership in these Class A Shares, except to the extent of any pecuniary interest he may have therein. These Class A Shares are owned by a private foundation, of which the Reporting Person is the president and one of five members of its board of directors. The Reporting Person does not have any pecuniary interest in these Class A Shares. He also disclaims beneficial ownership of these Class A Shares because decisions with respect to the voting and disposition of these shares are subject to the oversight of, and the approval of not less than three of, the foundation's five-member board of directors. /s/ Kimberly Shea, Attorney-in-Fact for Maurice J. Duca 2022-10-19