Appian CEO plans $1.7M sale of 45,000 shares

Appian Corporation (APPN) received a notice that CEO, President and 10% owner Matthew W. Calkins plans to sell up to 45,000 shares of Class A common stock under Rule 144 through J.P.

Rhea-AI Filing Summary

Appian Corporation (APPN) received a notice that CEO, President and 10% owner Matthew W. Calkins plans to sell up to 45,000 shares of Class A common stock under Rule 144 through J.P. Morgan Securities LLC. The shares to be sold were acquired via a stock option exercise on January 4, 2022, paid in cash. In the past three months, Calkins has reported sales of Class A common stock on July 7, 2026 and August 7, 2026. Class A common shares outstanding were 40,540,212 as of September 8, 2026; this is a baseline figure, not the amount being sold.

Key Figures

Planned shares to be sold: 45,000 shares Shares sold July 7, 2026: 50,000 shares Shares sold August 7, 2026: 45,000 shares +3 more

6 metrics

Planned shares to be sold 45,000 shares Class A common stock covered by the Rule 144 notice

Shares sold July 7, 2026 50,000 shares Class A common stock sale by Matthew W. Calkins during past three months

Shares sold August 7, 2026 45,000 shares Class A common stock sale by Matthew W. Calkins during past three months

Aggregate market value of planned sale $1,726,650 Aggregate market value reported for the 45,000 shares to be sold

Shares outstanding 40,540,212 shares Appian Class A common stock outstanding as of September 8, 2026

Broker address 270 Park Avenue, 10th Floor, New York, NY J.P. Morgan Securities LLC office handling the sale

Key Terms

Rule 144, Stock Option Exercise, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Stock Option Exercise financial

"01/04/2022 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

attorney-in-fact regulatory

"as agent and attorney-in-fact for Matthew W. Calkins"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

What does the Form 144 filing for APPN disclose about Matthew W. Calkins?

The filing states that Appian CEO, President and 10% owner Matthew W. Calkins intends to sell up to 45,000 shares of Appian Class A common stock under Rule 144 through J.P. Morgan Securities LLC.

How many APPN shares are planned to be sold under this Form 144?

The notice covers a proposed sale of up to 45,000 shares of Appian Class A common stock. These shares are to be sold through J.P. Morgan Securities LLC as broker.

How did Matthew W. Calkins acquire the APPN shares being sold?

The shares covered by the notice were acquired on January 4, 2022 through a stock option exercise from Appian Corporation, with the exercise price paid in cash.

What APPN share sales has Matthew W. Calkins reported in the past three months?

The filing lists two prior Form 144-reportable sales of Class A common stock by Matthew W. Calkins: on July 7, 2026 he sold 50,000 shares, and on August 7, 2026 he sold 45,000 shares.

How many Appian (APPN) Class A shares were outstanding as of the date referenced?

The document reports that 40,540,212 shares of Appian Class A common stock were outstanding as of September 8, 2026; this figure provides context and is not the amount being sold.

Which broker is handling the planned APPN share sale under Rule 144?

The notice identifies J.P. Morgan Securities LLC as the broker, acting as agent and attorney-in-fact for Matthew W. Calkins for the planned sale of Appian Class A common stock.

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

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Available on EDGAR 09/08/2026 - 04:48 PM EDT Accepted by SEC EDGAR 09/08/2026 - 04:47 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001309192
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Appian Corporation
SEC File Number	001-38098
Address of Issuer	7950 Jones Branch Drive McLean, VIRGINIA 22102
Phone	703-442-8844
Name of Person for Whose Account the Securities are To Be Sold	Matthew W. Calkins
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	CEO and President
Relationship to Issuer	10% Owner

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A Common Stock	J.P. Morgan Securities LLC 270 Park Avenue, 10th Floor New York NY 10017	45000	1726650	40540212	09/08/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A Common Stock	01/04/2022	Stock Option Exercise	Issuer			45000	01/04/2022	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Matthew W. Calkins C/o Appian Corporation 7950 Jones Branch Drive McLean VA 22102	Class A Common Stock	07/07/2026	50000	1236164
Matthew W. Calkins C/o Appian Corporation 7950 Jones Branch Drive McLean VA 22102	Class A Common Stock	08/07/2026	45000	1550493

144: Remarks and Signature

Remarks
Date of Notice	09/08/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/05/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Matthew W. Calkins
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)