Company: APPN
Filing Date: 2025-04-23
Form Type: DEF 14A
Source: 0001441683-25-000031
Chunk: 1

Company: APPIAN CORP
Filing Date: 2025-04-23
Form: DEF 14A
Chunk 1
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31, 2025.

3. To approve, on an advisory basis, the compensation of the Company’s named executive officers as disclosed in the Proxy Statement.

4. To conduct any other business properly brought before the Annual Meeting.

These items of business are more fully described in the Proxy Statement accompanying this Notice.

The record date for the Annual Meeting is April 8, 2025. Only stockholders of record at the close of business on that date may vote at the Annual Meeting or any adjournment thereof. 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. 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.

By Order of the Board of Directors,

Christopher Winters

General Counsel and Secretary

McLean, Virginia

April 23, 2025

### TABLE OF CONTENTS
| Questions and Answers About These Proxy Materials and Voting                                |     |  1 |
| Proposal No. 1 - Election of Directors                                                      |     |  7 |
| Information Regarding the Board of Directors and Corporate Governance                       |     | 10 |
| Independence of the Board of Directors                                                      |     | 10 |
| Board Leadership Structure                                                                  |     | 10 |
| Role of the Board in Risk Oversight                                                         |     | 11 |
| Meetings of the Board of Directors                                                          |     | 11 |
| Information Regarding Committees of the Board of Directors                                  |     | 11 |
| Stockholder Communications with the Board of Directors                                      |     | 15 |
| Code of Ethics                                                                              |     | 16 |
| Insider Trading Policy                                                                      |     | 16 |
| Proposal No. 2 - Ratification of Selection of Independent Registered Public Accounting Firm |     | 17 |
| Proposal No. 3 - Advisory Vote on Named Executive Officer Compensation                      |     | 18 |
| Executive Officers                                                                          |     | 19 |
| Security Ownership of Certain Beneficial Owners and Management                              |     | 20 |
| Executive and Director Compensation                                                         |     | 22 |
| Compensation Discussion and Analysis                                                        |     | 22 |
| Summary Compensation Table                                                                  |     | 28 |
| Grants of Plan-Based Awards in 2024                                                         |     | 29 |
|