APPN

appn-20260219false000144168300014416832026-02-192026-02-19

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 19, 2026

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On February 19, 2026, Appian Corporation (the "Company") issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2025, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 8.01. Other Events.

The Board of Directors has authorized a program to repurchase up to $50.0 million of Appian's common stock (the “Share Repurchase Program”), effective February 2026 through February 2028. The Share Repurchase Program does not obligate Appian to acquire any specific number of shares, and shares of common stock may be repurchased using a variety of methods, including privately negotiated and/or open market transactions, under plans complying with Rule 10b5-1 of the Exchange Act, as part of accelerated share repurchases, or other methods. The timing and amount of any purchases of common stock will be based on Appian’s liquidity, general business and market conditions, debt covenant restrictions and other factors, including alternative investment opportunities.

Item 9.01 Financial Statements and Exhibits.

Exhibit No.  Description

99.1  Press release dated February 19, 2026

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: February 19, 2026 By:/s/ Srdjan Tanjga Srdjan Tanjga Chief Financial Officer

appn-20251106false000144168300014416832025-11-062025-11-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 6, 2025

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On November 6, 2025, Appian Corporation (the "Company") issued a press release announcing its financial results for the third quarter ended September 30, 2025, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated November 6, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: November 6, 2025 By:/s/ Srdjan Tanjga Srdjan Tanjga Chief Financial Officer

appn-20250807false000144168300014416832025-08-072025-08-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2025

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On August 7, 2025, Appian Corporation (the "Company") issued a press release announcing its financial results for the first quarter ended June 30, 2025, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated August 7, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: August 7, 2025 By:/s/ Srdjan Tanjga Srdjan Tanjga Chief Financial Officer

appn-20250508false000144168300014416832025-05-082025-05-08

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 8, 2025

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On May 8, 2025, Appian Corporation (the "Company") issued a press release announcing its financial results for the first quarter ended March 31, 2025, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated May 8, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: May 8, 2025 By:/s/ Mark Lynch Mark Lynch Interim Chief Financial Officer

appn-20250219false000144168300014416832025-02-192025-02-19

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 19, 2025

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On February 19, 2025, Appian Corporation (the "Company") issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2024, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated February 19, 2025

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: February 19, 2025 By:/s/ Mark Lynch Mark Lynch Interim Chief Financial Officer

appn-20241107false000144168300014416832024-11-072024-11-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2024

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On November 7, 2024, Appian Corporation (the "Company") issued a press release announcing its financial results for the third quarter ended September 30, 2024, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated November 7, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: November 7, 2024 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20240801false000144168300014416832024-08-012024-08-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2024

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On August 1, 2024, Appian Corporation (the "Company") issued a press release announcing its financial results for the second quarter ended June 30, 2024, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated August 1, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: August 1, 2024 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20240502false000144168300014416832024-05-022024-05-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2024

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On May 2, 2024, Appian Corporation (the "Company") issued a press release announcing its financial results for the first quarter ended March 31, 2024, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated May 2, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: May 2, 2024 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20240416false000144168300014416832024-04-162024-04-16

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 16, 2024

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of Principal Executive Offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

Appian Corporation (together with its subsidiaries, “Appian,” “the Company,” “we,” or “our”) is holding an Investor Day presentation during our Appian World conference on April 16, 2024. In connection with our investor meeting, we are announcing preliminary financial results for the first quarter ended March 31, 2024. Set forth below are preliminary estimates of certain financial results that, based on available information to date, we expect to report for the three months ended March 31, 2024. While we expect our results will be within these ranges, our actual results may differ materially from these preliminary estimates.

Preliminary Estimated Results for the First Quarter 2024

•Cloud Subscriptions Revenue: Cloud subscriptions revenue is expected to be $86.6 million, up 24% compared to the first quarter of 2023. •Total Revenue: Total revenue is expected to be $149.8 million, up 11% compared to the first quarter of 2023. •GAAP net loss: GAAP net loss is expected to be between $(33.9) million and $(32.4) million, compared to $(36.8) million for the first quarter of 2023. •Adjusted EBITDA: Adjusted EBITDA loss is expected to be between $(2.0) million and $(1.0) million, compared to adjusted EBITDA loss of $(15.8) million for the first quarter of 2023.

Non-GAAP Financial Measure

Adjusted EBITDA, a non-GAAP financial performance measure, is defined as net loss before (1) other non-operating expenses (income), net, (2) interest expense, (3) income tax expense, (4) depreciation expense and amortization of intangible assets, (5) stock-based compensation expense, (6) certain non-ordinary litigation-related expenses consisting of legal and other professional fees associated with the Pegasystems cases, (7) amortization of the judgment preservation insurance policy, or JPI, and (8) severance costs related to an involuntary reduction in our workforce in 2023. The most directly comparable GAAP financial measure to adjusted EBITDA is net loss. Users should consider the limitations of using adjusted EBITDA, including the fact this measure does not provide a complete measure of our operating performance. Adjusted EBITDA is not intended to purport to be an alternative to net loss as a measure of operating performance or to cash flows from operating activities as a measure of liquidity.

Management and the Company’s Board of Directors use this non-GAAP measure to evaluate the Company’s performance. Appian believes both management and investors benefit from referring to this non-GAAP measure in assessing Appian’s performance and when planning, forecasting, and analyzing future periods. This non-GAAP financial measure also facilitates management’s internal comparisons to historical performance as well as comparisons to competitors’ operating results. Appian believes this non-GAAP financial measure is useful to investors both becaus

appn-20240329false000144168300014416832024-03-292024-03-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 29, 2024 (March 25, 2024)

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of Principal Executive Offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On March 25, 2024, Christopher Jones, Chief Revenue Officer of Appian Corporation (the “Company”), notified the Company he will be leaving the Company to take on an expanded role at a privately held software company. Upon receiving the notice, Mr. Jones and the Company agreed that his last day at the Company will be April 1, 2024.

Item 8.01 Other Events.

The Company has initiated a search for a replacement Chief Revenue Officer. In the interim, the sales department leaders will report directly to Matthew Calkins, the Company’s Chief Executive Officer.

Item 2.02 Results of Operations and Financial Condition.

The Company is affirming its previously provided guidance for the first quarter and full year ending December 31, 2024, previously provided in its fourth quarter 2023 earnings release and conference call on February 15, 2024.

The information included in Item 2.02 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Forward-Looking Statements

This Current Report on Form 8-K includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this Current Report on Form 8-K other than statements of historical facts, including statements regarding the Company's future financial and business performance for the first quarter and full year 2024, are forward-looking statements. The words “anticipate,” “believe,” “continue,” “estimate,” “expect,” “intend,” “may,” “will,” “plan,” and similar expressions are intended to identify forward-looking statements. The Company has based these forward-looking statements on its current expectations and projections about future events and financial trends that the Company believes may affect its financial condition, results of operations, business strategy, short-term and long-term business operations and objectives, and financial needs. These forward-looking statements are subject to a number of risks and uncertainties, including the risks and uncertainties associated with the Company’s ability to grow its business and manage its growth, the Company’s ability to sustain its revenue growth rate, continued market acceptance of the Company’s AI-Powered Process platform and adoption of low-code solutions to drive digital transformation, the fluctuation of the Company’s operating results due to the length and variability of its sales cycle, c

appn-20240215false000144168300014416832024-02-152024-02-15

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 15, 2024

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On February 15, 2024, Appian Corporation (the "Company") issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2023, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated February 15, 2024

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: February 15, 2024 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20231102false000144168300014416832023-11-022023-11-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2023

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On November 2, 2023, Appian Corporation (the "Company") issued a press release announcing its financial results for the third quarter ended September 30, 2023, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated November 2, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: November 2, 2023 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20230803false000144168300014416832023-08-032023-08-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 3, 2023

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On August 3, 2023, Appian Corporation (the "Company") issued a press release announcing its financial results for the second quarter ended June 30, 2023, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated August 3, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: August 3, 2023 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20230509false000144168300014416832023-05-092023-05-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 9, 2023

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware001-3809854-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On May 9, 2023, Appian Corporation (the "Company") issued a press release announcing its financial results for the first quarter ended March 31, 2023, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated May 9, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: May 9, 2023 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20230216false000144168300014416832023-02-162023-02-16

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 16, 2023

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware 001-38098 54-1956084

(State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On February 16, 2023, Appian Corporation (the "Company") issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2022, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated February 16, 2023

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: February 16, 2023 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20221103false000144168300014416832022-11-032022-11-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2022

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware 001-38098 54-1956084

(State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On November 3, 2022, Appian Corporation (the "Company") issued a press release announcing its financial results for the third quarter ended September 30, 2022, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated November 3, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: November 3, 2022 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20220804false000144168300014416832022-08-042022-08-04

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2022

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware 001-38098 54-1956084

(State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition. On August 4, 2022, Appian Corporation (the "Company") issued a press release announcing its financial results for the second quarter ended June 30, 2022, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing. Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1  Press release dated August 4, 2022

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: August 4, 2022 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20220517false000144168300014416832022-05-172022-05-17

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 17, 2022

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware 001-38098 54-1956084

(State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 17, 2022, Eric Cross, Chief Revenue Officer of Appian Corporation (the “Company”), notified the Company that he will be leaving the Company at the end of June 2022 to take on an expanded role at a late stage software company.

Item 8.01 Other Events.

The Company has initiated a search for a replacement Chief Revenue Officer. In the interim, Paul Maguire, Managing Director, International, who joined the Company in 2016, will manage the Company’s sales department outside the Americas and John Sellers, Senior Vice President of Go-To-Market, Planning and Operations, who joined the Company in 2021, will manage the Company’s sales department within the Americas. Each will report directly to Matthew Calkins, the Company’s Chief Executive Officer.

The Company has also announced that effective May 17, 2022, William D. McCarthy, a nominee to the Company’s Board of Directors at the 2022 Annual Meeting of Stockholders, will serve as Acting Chief Operating Officer on a consultancy basis. Mr. McCarthy has served as an advisor to the Board of Directors since 2021. He previously served as Chief Revenue Officer of InfoBlox, Inc.

Item 2.02 Results of Operations and Financial Condition.

The Company is affirming its previously provided guidance for the second quarter and full year ending December 31, 2022, previously provided in its first quarter earnings release and conference call on May 5, 2022.

The information included in Item 2.02 of this Current Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Forward-Looking Statements

This Current Report on Form 8-K includes forward-looking statements. All statements contained in this Form 8-K other than statements of historical facts, including statements regarding the Company's future financial and business performance for the second quarter and full year 2022, are forward-looking statements. The words “anticipate,” “believe,” “continue,” “estimate,” “expect,” “intend,” “may,” “will,” and similar expressions are intended to identify forward-looking statements. The Company has based these forward-looking statements on its current expectations and projections about future events and financial trends that the Company believes may affect its financial condition, results of operations, business strategy, short-term and long-term business operations and objectives, and financial needs. These forward-looking statements are subject to a number o

appn-20220505false000144168300014416832022-05-052022-05-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2022

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware 001-38098 54-1956084

(State or Other Jurisdiction of Incorporation) (Commission File Number)(I.R.S. Employer Identification No.)

7950 Jones Branch Drive McLean, VA 22102 (Address of principal executive offices)(Zip Code)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition. On May 5, 2022, Appian Corporation (the "Company") issued a press release announcing its financial results for the first quarter ended March 31, 2022, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1  Press release dated May 5, 2022

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: May 5, 2022 By:/s/ Mark Matheos Mark Matheos Chief Financial Officer

appn-20220217false000144168300014416832022-02-172022-02-17

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 17, 2022

Appian Corporation (Exact name of Registrant as Specified in Its Charter)

Delaware 001-38098 54-1956084

(State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

7950 Jones Branch Drive 22102 McLean,VA(Zip Code)

(Address of principal executive offices)

Registrant’s Telephone Number, Including Area Code: (703) 442-8844

Not Applicable (Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below): ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:

Title of each classTrading symbolName of each exchange on which registered Class A Common StockAPPNThe Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition. On February 17, 2022, Appian Corporation (the "Company") issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2021, as well as information regarding a conference call to discuss these financial results and the Company's recent business highlights and financial outlook. The Company's press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The information included in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits.

Exhibit Number Description

99.1  Press release dated February 17, 2022

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Appian Corporation

Date: February 17, 2022 By:/s/ Mark Lynch Mark Lynch Chief Financial Officer