Company: APPN
Filing Date: 2025-04-23
Form Type: DEF 14A
Source: 0001441683-25-000031
Chunk: 59

Company: APPIAN CORP
Filing Date: 2025-04-23
Form: DEF 14A
Chunk 59
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| Christopher Winters                 |
| General Counsel and Secretary       |
| April 23, 2025                      |

A copy of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024, is available without charge upon written request to: Appian Corporation, 7950 Jones Branch Drive, McLean, Virginia 22102, Attention: Secretary.

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### APPENDIX A - NON-GAAP RECONCILIATION

### NON-GAAP FINANCIAL MEASURES
In addition to reporting our financial information in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, we believe certain non-GAAP measures provide investors with meaningful insights into the Company's ongoing business performance. We believe the presentation of these non-GAAP financial measures helps to identify underlying trends in our business from period to period that could otherwise be distorted by the effect of certain expenses, gains, and other items included in our operating results. Investors should also consider our performance and financial condition as reported under GAAP and all other relevant information when assessing our performance or financial condition. Non-GAAP measures have limitations as analytical tools, and investors should not consider them in isolation or as a substitute for analysis of our financial results or financial condition as reported under GAAP.

The following table reconciles GAAP net loss to adjusted EBITDA for the years ended December 31, 2024 and 2023 (in thousands):

|                                                            |     | Year Ended December 31, |    2024 |     |   |     2023 |
|:-----------------------------------------------------------|:----|:------------------------|--------:|:----|:--|---------:|
| Reconciliation of adjusted EBITDA:                         |     |                         |         |     |   |          |
| GAAP net loss                                              |     | $                       | -92,262 |     | $ | -111,441 |
| Other expense (income), net                                |     |                         |   6,773 |     |   |  -17,603 |
| Interest expense                                           |     |                         |  23,582 |     |   |   17,862 |
| Income tax expense                                         |     |                         |   1,054 |     |   |    3,209 |
| Depreciation expense and amortization of intangible