Officer/Director Transaction Report

Bobbie G Kilberg, a director at Appian Corp, reported a series of transactions on April 10, 2026, involving Class A and Class B Common Stock. Kilberg acquired 10,800 shares of Class B Common Stock at a price of $11.17 per share, following the exercise of a stock option. Concurrently, 10,800 shares of Class B Common Stock were converted into 10,800 shares of Class A Common Stock, with a reported transaction price of $0.00. Additionally, 10,800 shares of Class A Common Stock were acquired, also with a reported transaction price of $0.00. Following these transactions, Kilberg directly owns 12,096 shares of Class A Common Stock. Indirectly, through various trusts, Kilberg holds an additional 60,031 shares of Class A Common Stock. The footnotes indicate that the Class B Common Stock is convertible into Class A Common Stock under certain conditions, including transfers and automatic conversion when Class B shares fall below 10% of aggregate voting power. The transactions were executed via an attorney-in-fact.