# EDGAR Filing Document

**Accession Number:** 0001441683
**File Stem:** 0001707384-26-000004
**Filing Date:** 2026-3
**Character Count:** 8048
**Document Hash:** dc914a3c77a16ac4884d49a8ba5a78de
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001707384-26-000004.hdr.sgml**: 20260303

**ACCESSION NUMBER**: 0001707384-26-000004

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260303

**FILED AS OF DATE**: 20260303

**DATE AS OF CHANGE**: 20260303

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Lynch Mark Steven
- **CENTRAL INDEX KEY:** 0001707384

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38098
- **FILM NUMBER:** 26716597

**MAIL ADDRESS:**
- **STREET 1:** 11955 DEMOCRACY DRIVE
- **STREET 2:** SUITE 1700
- **CITY:** RESTON
- **STATE:** VA
- **ZIP:** 20190
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** APPIAN CORP
- **CENTRAL INDEX KEY:** 0001441683
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 541956084
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 7950 JONES BRANCH DRIVE
- **CITY:** MCLEAN
- **STATE:** VA
- **ZIP:** 22102
- **BUSINESS PHONE:** 703-442-8844

**MAIL ADDRESS:**
- **STREET 1:** 7950 JONES BRANCH DRIVE
- **CITY:** MCLEAN
- **STATE:** VA
- **ZIP:** 22102

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Lynch Mark Steven<br><sub>(Last) (First) (Middle)</sub><br>C/O APPIAN CORPORATION<br>7950 JONES BRANCH DRIVE<br><sub>(Street)</sub><br>MCLEAN, VA 22102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>APPIAN CORP [ APPN ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A Common Stock | 2026-03-03 |  | C<sup>(1)</sup> |  | 9430 | A | 9.46<sup>(2)(3)</sup> | 53398 | D |  |
| Class A Common Stock | 2026-03-03 |  | C<sup>(1)</sup> |  | 100 | A | 12<sup>(2)(3)</sup> | 53498 | D |  |
| Class A Common Stock | 2026-03-03 |  | S |  | 9530 | D | $27 | 43968 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Employee Stock Option (Right to Buy) | $9.46 | 2026-03-03 |  | M |  |  | 9430 | <sup>(4)</sup> | 2026-07-20 | Class B Common Stock | 9430 | $0 | 0 | D |  |
| Class B Common Stock | <sup>(2)(3)</sup> | 2026-03-03 |  | M |  | 9430 |  | <sup>(2)(3)</sup> | <sup>(2)(3)</sup> | Class A Common Stock | 9430 | $9.46 | 9430 | D |  |
| Class B Common Stock | <sup>(2)(3)</sup> | 2026-03-03 |  | C<sup>(1)</sup> |  |  | 9430 | <sup>(2)(3)</sup> | <sup>(2)(3)</sup> | Class A Common Stock | 9430 | $0 | 0 | D |  |
| Employee Stock Option (Right to Buy) | $12 | 2026-03-03 |  | M |  |  | 100 | <sup>(4)</sup> | 2027-04-25 | Class B Common Stock | 100 | $0 | 0 | D |  |
| Class B Common Stock | <sup>(2)(3)</sup> | 2026-03-03 |  | M |  | 100 |  | <sup>(2)(3)</sup> | <sup>(2)(3)</sup> | Class A Common Stock | 100 | $12 | 100 | D |  |
| Class B Common Stock | <sup>(2)(3)</sup> | 2026-03-03 |  | C<sup>(1)</sup> |  |  | 100 | <sup>(2)(3)</sup> | <sup>(2)(3)</sup> | Class A Common Stock | 100 | $0 | 0 | D |  |

---

### Footnotes:

(1) Pursuant to the terms of the Class B Common Stock, the Reporting Person converted shares of Class B Common Stock into shares of Class A Common Stock.

(2) (continued from Footnote (2)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

(3) Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (3))

(4) Fully vested.

**Signature:** /s/ Angela Patterson, Attorney-in-Fact  
**Date:** 2026-03-03

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**