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APPIAN CORP

For the period ended Mar 31, 2026. Filed May 7, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed May 7, 2026

APPN$51.15-0.9%Stored close · as of Nov 9, 2026

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Item 5. Other Information

Rule 10b5-1 Trading Plans

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 thethree months ended March 31, 2026, 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
Matthew Calkins (1)Chief Executive Officer and Chairman of the BoardAdoption03/5/20265/28/2027600,000

(1) Matthew Calkins, Chief Executive Officer and Chairman of the Board of Directors, entered into a prearranged stock trading plan pursuant to Rule 10b5-1 on March 5, 2026. Mr. Calkins’ plan provides for the potential sale of up to 600,000 shares of Appian Class A common stock. The plan commences on June 8, 2026 and expires on the earlier of the completion of all authorized transactions under the plan or May 28, 2027.

Other than disclosed above, none of our directors or officers adopted orterminated a "non-Rule 10b5-1 trading arrangement" as defined in Item 408 of Regulation S-K.

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