Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Zamudio-Ramirez Pavel 2. Issuer Name and Ticker or Trading Symbol APPIAN CORP [APPN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Customer Officer (Last) (First) (Middle) 7950 JONES BRANCH DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 05/05/2026 (Street) MCLEAN, VA 22102 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 05/06/2026 M 10,272 A $ 0 (1) 36,376(2) D Class A Common Stock 05/06/2026 F 3,314 D $22.72 33,062 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Unit

(3)

05/05/2026

M

2,935

(4)

(4)

Class A Common Stock

2,935

$ 0

8,805

D

Restricted Stock Unit

(3)

05/05/2026

M

7,337

(5)

(5)

Class A Common Stock

7,337

$ 0

0

D

Restricted Stock Unit

(3)

05/05/2026

A

15,848

(6)

(6)

Class A Common Stock

15,848

$ 0

15,848

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Zamudio-Ramirez Pavel 7950 JONES BRANCH DRIVE MCLEAN, VA 22102			Chief Customer Officer

Signatures

/s/ Angela Patterson, Attorney-in-Fact		05/07/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Each Restricted Stock Unit ("RSU") converts into Class A Common Stock on a one-for-one basis.
(2)	Includes 221 and 218 shares acquired on 3/4/2026 and 4/2/2026, respectively, under the Appian Corporation Employee Stock Purchase Plan.
(3)	Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock (or its cash equivalent, at the discretion of the Issuer).
(4)	The RSUs were granted on May 6, 2025, and vest in four equal annual installments commencing on May 5, 2025, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.
(5)	The RSUs were granted on May 6, 2025, and vested on May 5, 2026.
(6)	The RSUs were granted on May 5, 2026, and vest in four equal annual installments commencing on May 5, 2026, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.

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