Company: APPN
Filing Date: 2025-04-23
Form Type: DEF 14A
Source: 0001441683-25-000031
Chunk: 5

Company: APPIAN CORP
Filing Date: 2025-04-23
Form: DEF 14A
Chunk 5
---
, or by mail as instructed below to ensure your vote is counted.

Beneficial Owner: Shares Registered in the Name of a Broker or Bank

If on April 8, 2025 your shares were held not in your name but rather in an account at a brokerage firm, bank, dealer, or other similar organization, then you are the beneficial owner of shares held in “street name”, and the Notice is being forwarded to you by that organization. The organization holding your shares is considered to be the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your broker or other agent regarding how to vote the shares in your account. You are also invited to attend the Annual Meeting. However, since you are not the stockholder of record, you may not vote your shares at the Annual Meeting unless you request and obtain a valid proxy from your broker or other agent.

Will a list of stockholders entitled to vote at the Annual Meeting be available?

For the ten days prior to the Annual Meeting, a list of stockholders entitled to vote at the Annual Meeting will be available for examination by any stockholder of record for purposes germane to the Annual Meeting at our corporate headquarters during regular business hours. To access the list of record stockholders beginning ten days prior to the Annual Meeting and until the meeting, stockholders can schedule an appointment by contacting the Corporate Secretary at (703) 442-8844. In addition, during the Annual Meeting, that list of stockholders will be available for examination by any stockholder of record at www.virtualshareholdermeeting.com/APPN2025.

#### What am I voting on?
There are three matters scheduled for a vote:

• Proposal No. 1 : Election of nine directors;

<div align='center'>2</div>

• Proposal No. 2 : Ratification of the selection by the Audit Committee of the Board of Directors of BDO USA, P.C. (“BDO”) as independent registered public accounting firm of the Company for its fiscal year ending December 31, 2025; and

• Proposal No. 3 : Advisory approval of the compensation of our named executive officers, as disclosed in this Proxy Statement in accordance with SEC rules.

What if another matter is properly brought before the meeting?

The Board of Directors knows of no other matters that will be presented for consideration at the Annual Meeting. If any other matters are properly brought before the meeting, it is the intention of the persons named in the accompanying proxy to vote