Appian CEO sells 45,000 shares in preset plan

Appian’s CEO and major shareholder reported automatic Rule 10b5-1 plan sales totaling 45,000 Class A shares on September 8, 2026.

Rhea-AI Filing Summary

Appian Corp (APPN) reported that Matthew W. Calkins, its CEO, President, director and more than ten percent owner, sold a total of 45,000 shares of Class A Common Stock on September 8, 2026 in three open-market transactions at weighted average prices between $34.73 and $37.07. These sales occurred automatically under a Rule 10b5-1 trading plan adopted on March 5, 2026.

Insider Trade Summary 10b5-1

Net Seller: 45,000 shares

Net Sell 3 txns

Insider Calkins Matthew W

Role CEO and President

Sold 45,000 shs ($1.58M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2	23,888	$34.73	$830K
Sale	Class A Common Stock F1, F3	19,116	$35.58	$680K
Sale	Class A Common Stock F1, F4	1,996	$37.07	$74K

Holdings After Transaction: Class A Common Stock — 1,629,144 shares (Direct)

Footnotes (4)

1. F1. Represents sales that occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 5, 2026.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.14 to $35.13, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.14 to $35.58, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.39 to $37.40, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Total shares sold: 45,000 shares First block sold: 23,888 shares at $34.73 per share Second block sold: 19,116 shares at $35.58 per share +2 more

5 metrics

Total shares sold 45,000 shares Class A Common Stock sold by Matthew W. Calkins on September 8, 2026

First block sold 23,888 shares at $34.73 per share Weighted average price, trades between $34.14 and $35.13 on September 8, 2026

Second block sold 19,116 shares at $35.58 per share Weighted average price, trades between $35.14 and $35.58 on September 8, 2026

Third block sold 1,996 shares at $37.07 per share Weighted average price, trades between $36.39 and $37.40 on September 8, 2026

Rule 10b5-1 plan adoption date March 5, 2026 Date Matthew W. Calkins adopted the trading plan governing these sales

Key Terms

Rule 10b5-1 trading plan, weighted average price, Class A Common Stock

3 terms

Rule 10b5-1 trading plan regulatory

"Represents sales that occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 5, 2026."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Class A Common Stock financial

"These shares were sold in multiple transactions at prices ranging from $34.14 to $35.13, inclusive."

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did APPN report for Matthew W. Calkins?

Appian reported that Matthew W. Calkins sold 45,000 shares of Class A Common Stock on September 8, 2026 in three open-market transactions at weighted average prices between $34.73 and $37.07.

Were the September 8, 2026 APPN share sales under a Rule 10b5-1 plan?

Yes. The filing states the sales "occurred automatically pursuant to a Rule 10b5-1 trading plan" adopted by Matthew W. Calkins on March 5, 2026, indicating they were pre-arranged rather than discretionary trades on that day.

How many APPN shares did Matthew W. Calkins sell in each transaction?

On September 8, 2026, he sold 23,888 shares at a weighted average of $34.73, 19,116 shares at a weighted average of $35.58, and 1,996 shares at a weighted average of $37.07.

What price ranges applied to the APPN trades reported on September 8, 2026?

The filing explains the weighted average prices reflect multiple trades: $34.14–$35.13 for 23,888 shares, $35.14–$35.58 for 19,116 shares, and $36.39–$37.40 for 1,996 shares.

What role does Matthew W. Calkins have at APPN in this Form 4?

Matthew W. Calkins is identified as CEO and President, a director, and a more than ten percent owner of Appian Corp in connection with these reported share sales.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/10/2026 - 04:28 PM Accepted by SEC EDGAR 09/10/2026 - 04:28 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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^*

Calkins Matthew W

(Last) (First) (Middle)

7950 JONES BRANCH DRIVE

(Street)

MCLEAN VIRGINIA 22102

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
APPIAN CORP [ APPN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	CEO and President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	09/08/2026		S(1)		23,888	D	$34.73(2)	1,650,256	D
Class A Common Stock	09/08/2026		S(1)		19,116	D	$35.58(3)	1,631,140	D
Class A Common Stock	09/08/2026		S(1)		1,996	D	$37.07(4)	1,629,144	D

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents sales that occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 5, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.14 to $35.13, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.14 to $35.58, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.39 to $37.40, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Remarks:

	/s/ Angela Patterson, Attorney-in-Fact	09/10/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)