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Insider Trading Arrangements
 3 Months Ended 12 Months Ended
Dec. 31, 2024
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Dec. 31, 2024
shares
Trading Arrangements, by Individual    
Material Terms of Trading Arrangement  
The adoption or termination of contracts, instructions, or written plans for the purchase or sale of our securities by our Section 16 officers and directors for the three months ended December 31, 2024, each of which is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act (“Rule 10b5-1 Plan”), were as follows:

NameTitleActionDate AdoptedExpiration DateAggregate # of Securities to be Purchased/Sold
Robert Kramer (1)
General Manager and DirectorAdoption12/3/20243/5/2026236,382
(1) Robert Kramer, General Manager and a member of the Board of Directors, entered into a prearranged stock trading plan pursuant to Rule 10b5-1 on December 3, 2024. Mr. Kramer’s plan provides for the potential sale of up to 236,382 shares of Appian Class A common stock. The plan commences on March 6, 2025 and expires on the earlier of the completion of all authorized transactions under the plan or March 5, 2026.
Non-Rule 10b5-1 Arrangement Adopted false  
Rule 10b5-1 Arrangement Terminated false  
Non-Rule 10b5-1 Arrangement Terminated false  
Robert Kramer [Member]    
Trading Arrangements, by Individual    
Name Robert Kramer (1)  
Title General Manager and Director  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 12/3/2024  
Expiration Date 3/5/2026  
Arrangement Duration 364 days  
Aggregate Available 236,382 236,382