Company: APPN
Filing Date: 2025-04-23
Form Type: DEF 14A
Source: 0001441683-25-000031
Chunk: 2

Company: APPIAN CORP
Filing Date: 2025-04-23
Form: DEF 14A
Chunk 2
---
 Outstanding Equity Awards at December 31, 2024                                              |     | 30 |
| Option Exercises and Stock Vested in 2024                                                   |     | 31 |
| Employment Agreements                                                                       |     | 31 |
| Equity Plan Terms                                                                           |     | 32 |
| Summary of Estimated Amounts Payable Upon a Termination or Change in Control                |     | 32 |
| CEO Pay Ratio                                                                               |     | 33 |
| Pay Versus Performance                                                                      |     | 33 |
| Director Compensation                                                                       |     | 36 |
| Securities Authorized for Issuance Under Equity Compensation Plans                          |     | 38 |
| Limitations on Liability and Indemnification Matters                                        |     | 38 |
| Transactions with Related Persons                                                           |     | 39 |
| Related Person Transactions Policy and Procedures                                           |     | 39 |
| Certain Related Person Transactions                                                         |     | 39 |
| Householding of Proxy Materials                                                             |     | 41 |
| Other Matters                                                                               |     | 41 |
| Appendix A - Non-GAAP Reconciliation                                                        |     | 42 |

### APPIAN CORPORATION

#### 7950 JONES BRANCH DRIVE, MCLEAN, VIRGINIA 22102

### PROXY STATEMENT

#### FOR THE 2025 ANNUAL MEETING OF STOCKHOLDERS

#### To Be Held on June 4, 2025

### QUESTIONS AND ANSWERS ABOUT THESE PROXY MATERIALS AND VOTING
Why did I receive a notice regarding the availability of proxy materials on the Internet?

Pursuant to rules adopted by the Securities and Exchange Commission (the “SEC”), we have elected to provide access to our proxy materials over the Internet. Accordingly, we have sent you a Notice of Internet Availability of Proxy Materials (the “Notice”) because the Board of Directors (the “Board”) of Appian Corporation (sometimes referred to as the “Company,” “Appian,” “we,” “us,” or “our”) is soliciting your proxy to vote at the 2025 Annual Meeting of Stockholders (the “Annual Meeting”), including at any adjournments or postponements of the Annual Meeting. All stockholders will have the ability to access the proxy materials on the website referred to in the Notice or request to receive a printed set of the proxy materials. Instructions on how to access the proxy materials over the Internet or to request a printed copy may be found in the Notice.

We intend to mail the Notice on or about April