APPN / Appian Corporation - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Appian Corporation
US ˙ NasdaqGM ˙ US03782L1017

Mga Batayang Estadistika
LEI 529900NIARIFW7HGU386
CIK 1441683
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Appian Corporation
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 29, 2025 8-K

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 29, 2025 Appian Corporatio

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 29, 2025 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

August 7, 2025 8-K

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

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

August 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

August 7, 2025 EX-10.3

Filed herewith.

Exhibit 10.3 SIXTH AMENDMENT TO CREDIT AGREEMENT This Sixth Amendment to Credit Agreement (this “Amendment”) is made effective as of May 27, 2025 (the “Sixth Amendment Effective Date”), by and among Appian Corporation, a Delaware corporation (the “Borrower”), the lenders identified on the signature pages hereto (the “Lenders”), Silicon Valley Bank, a division of First-Citizens Bank & Trust Company

August 7, 2025 EX-10.2

Filed herewith.

Exhibit 10.2 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (“Agreement”) is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents (“Appian” or “Company”), and Serge Tanjga (“you” and all similar references or “employee”) (collectively, the “parties”) in consideration of employee’s at-will employment relationship with

August 7, 2025 EX-99.1

Appian Announces Second Quarter 2025 Financial Results Second quarter cloud subscriptions revenue increased 21% year-over-year to $106.9 million Second quarter total revenue increased 17% year-over-year to $170.6 million

Exhibit 99.1 Appian Announces Second Quarter 2025 Financial Results Second quarter cloud subscriptions revenue increased 21% year-over-year to $106.9 million Second quarter total revenue increased 17% year-over-year to $170.6 million McLean, VA – August 7, 2025 – Appian (Nasdaq: APPN) today announced financial results for the second quarter ended June 30, 2025. “Appian AI drove strong financial re

August 7, 2025 EX-10.1

Filed herewith.

Exhibit 10.1 April 16, 2025 S. Tanjga New York, New York Dear Serge: On behalf of everyone at Appian, I am pleased to offer you employment in the position of Chief Financial Officer, reporting to Matt Calkins, with a start date of May 27, 2025. Your starting annual compensation will be $750,000 less applicable taxes and withholdings. Employees are paid on a semi-monthly basis in accordance with Ap

June 5, 2025 8-K

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): June 4, 2025 Appian Corporation (

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): June 4, 2025 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Nu

May 28, 2025 8-K

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 27, 2025 Appian Corporation (

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 27, 2025 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Nu

May 8, 2025 EX-99.1

Appian Announces First Quarter 2025 Financial Results Cloud subscriptions revenue increased 15% year-over-year to $99.8 million and generated operating cash flow of $45.0 million

Exhibit 99.1 Appian Announces First Quarter 2025 Financial Results Cloud subscriptions revenue increased 15% year-over-year to $99.8 million and generated operating cash flow of $45.0 million McLean, VA – May 8, 2025 – Appian (Nasdaq: APPN) today announced financial results for the first quarter ended March 31, 2025. “In Q1, Appian continued to demonstrate our earnings potential, with narrowing ne

May 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

May 8, 2025 8-K

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 (E

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Num

April 23, 2025 DEF 14A

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 23, 2025 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 21, 2025 EX-99.1

Appian Appoints Serge Tanjga as Chief Financial Officer

Exhibit 99.1 Appian Appoints Serge Tanjga as Chief Financial Officer McLean, VA – April 21, 2025 – Appian (Nasdaq: APPN) today announced the appointment of Serge Tanjga to the position of Chief Financial Officer, effective as of May 27, 2025. He will report directly to Matt Calkins, CEO of Appian. Tanjga brings more than 20 years of financial experience to Appian. He was the Senior Vice President

April 21, 2025 8-K

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 21, 2025 Appian Corporation

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 21, 2025 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

March 7, 2025 8-K

Financial Statements and Exhibits, Other Events

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 7, 2025 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File N

March 7, 2025 EX-99.1

Supreme Court of Virginia Agrees to Hear Appian Petition to Reinstate $2.036 Billion Verdict Against Pegasystems, Inc.

Exhibit 99.1 Supreme Court of Virginia Agrees to Hear Appian Petition to Reinstate $2.036 Billion Verdict Against Pegasystems, Inc. MCLEAN, VA — March 7, 2025 — Appian [Nasdaq: APPN] announced today that the Supreme Court of Virginia agreed to hear its petition seeking to reinstate the $2.036 billion judgment against Pegasystems, Inc. (“Pega”). The petition, which raised four different errors made

February 19, 2025 EX-21.1

Filed herewith.

Exhibit 21.1 Subsidiaries of Appian Corporation Name of Subsidiary Jurisdiction of Organization Appian Europe Ltd. England and Wales Appian Software International GmbH Switzerland (Zug Canton) Appian Netherlands BV Netherlands Appian Software Australia Pty. Ltd Australia Appian France SARL France Appian Software Italy S.R.L. Italy Appian Software Germany GmbH Germany Appian Singapore Pte. Ltd. Sin

February 19, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fi

February 19, 2025 EX-19

Filed herewith.

Appian Corporation Insider Trading Policy (Amended February 11, 2025) Introduction During the course of your relationship with Appian Corporation and its subsidiaries (“Appian”), you may receive important information that is not yet publicly available about Appian or other publicly traded companies that Appian has business relationships with in connection with your employment or relationship with Appian (“inside information”).

February 19, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

February 19, 2025 EX-10.32

Filed herewith.

Exhibit 10.32 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (“Agreement”) is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents (“Appian” or “Company”), and Mark Dorsey (“you” and all similar references or “employee”) (collectively, the “parties”) in consideration of employee’s at-will employment relationship with

February 19, 2025 EX-99.1

Appian Announces Fourth Quarter and Full Year 2024 Financial Results Fourth quarter cloud subscription revenue increased 19% year-over-year to $98.9 million Full year cloud subscription revenue increased 21% year-over year to $368.0 million

Exhibit 99.1 Appian Announces Fourth Quarter and Full Year 2024 Financial Results Fourth quarter cloud subscription revenue increased 19% year-over-year to $98.9 million Full year cloud subscription revenue increased 21% year-over year to $368.0 million McLean, VA – February 19, 2025 – Appian (Nasdaq: APPN) today announced financial results for the fourth quarter and full year ended December 31, 2

November 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

November 7, 2024 8-K

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 Corporati

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fil

November 7, 2024 EX-10.1

Filed herewith.

Exhibit 10.1 October 10, 2024 Mark Lynch Letter of Engagement as Interim CFO Dear Mark: Per our discussions, I am offering you employment as the Interim Chief Financial Officer (“Interim CFO”) of Appian, reporting to me, with a start date of November 4, 2024. This position is considered an exempt level position for the purposes of federal wage-hour law, and you will be paid on a semi-monthly basis

November 7, 2024 EX-99.1

Appian Announces Third Quarter 2024 Financial Results Third quarter cloud subscription revenue increased 22% year-over-year to $94.1 million

Exhibit 99.1 Appian Announces Third Quarter 2024 Financial Results Third quarter cloud subscription revenue increased 22% year-over-year to $94.1 million McLean, VA – November 7, 2024 – Appian (Nasdaq: APPN) today announced financial results for the third quarter ended September 30, 2024. “Appian continues to grow even as we become more efficient. Growth remains our top priority. We now project po

October 11, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

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): October 11, 2024 (October 9, 2024) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporatio

October 11, 2024 EX-99.1

Appian Names Mark Dorsey Chief Revenue Officer Proven executive brings over 25 years of strategic sales leadership experience to process automation industry leader

Exhibit 99.1 Appian Names Mark Dorsey Chief Revenue Officer Proven executive brings over 25 years of strategic sales leadership experience to process automation industry leader MCLEAN, VA — October 11, 2024 — Appian (Nasdaq: APPN) today announced the appointment of Mark Dorsey as Chief Revenue Officer. Dorsey will lead the company’s global sales operation to accelerate growth, including through di

October 1, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

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): October 1, 2024 (September 25, 2024) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporat

October 1, 2024 EX-99.1

Appian Elects Carl “Boe” Hartman II to Board of Directors

Exhibit 99.1 Appian Elects Carl “Boe” Hartman II to Board of Directors MCLEAN, VA — October 1, 2024 — Appian (Nasdaq: APPN) today announced the election of Carl “Boe” Hartman II to the Appian Board of Directors. Mr. Hartman was also appointed to serve on the Appian Compensation Committee. He assumed both roles as of October 1, 2024. Mr. Hartman is the Co-Founder and Chief Technology Officer of Nom

August 26, 2024 SC 13D/A

APPN / Appian Corporation / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A 1 d890202dsc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 44)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 1001

August 26, 2024 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 43 TO THE SCHEDULE 13D

EX-99.A 2 d890202dex99a.htm EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 43 TO THE SCHEDULE 13D The below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market, other than those denoted with an asterisk, which were block trades. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified

August 15, 2024 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 42 TO THE SCHEDULE 13D

EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 42 TO THE SCHEDULE 13D The below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market, other than those denoted with an asterisk, which were block trades. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected

August 15, 2024 SC 13D/A

APPN / Appian Corporation / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

August 2, 2024 SC 13D/A

APPN / Appian Corporation / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A 1 d878824dsc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 42)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 1001

August 2, 2024 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 41 TO THE SCHEDULE 13D

EX-99.A 2 d878824dex99a.htm EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 41 TO THE SCHEDULE 13D The below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transaction. Transaction Date

August 1, 2024 EX-99.1

Appian Announces Second Quarter 2024 Financial Results Second quarter cloud subscription revenue increased 19% year-over-year to $88.4 million

Exhibit 99.1 Appian Announces Second Quarter 2024 Financial Results Second quarter cloud subscription revenue increased 19% year-over-year to $88.4 million McLean, VA – August 1, 2024 – Appian (Nasdaq: APPN) today announced financial results for the second quarter ended June 30, 2024. “Due to enhanced functionality launched this quarter, Appian AI usage nearly doubled,” said Matt Calkins, CEO & Fo

August 1, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

August 1, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

July 31, 2024 EX-99.1

Appian Will Seek to Reinstate Judgment Against Pegasystems, Inc. In Virginia Supreme Court

Exhibit 99.1 Appian Will Seek to Reinstate Judgment Against Pegasystems, Inc. In Virginia Supreme Court In its opinion, the Court of Appeals of Virginia fundamentally misread and misapplied precedent from the Supreme Court of Virginia and failed to give due regard to the trial judge’s evidentiary determinations and trial misconduct by Pegasystems MCLEAN, VA — July 30, 2024 — Appian (Nasdaq: APPN)

July 31, 2024 8-K

Financial Statements and Exhibits, Other Events

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): July 31, 2024 (July 30, 2024) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (C

July 24, 2024 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 39 TO THE SCHEDULE 13D

EX-99.A 2 d876170dex99a.htm EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 39 TO THE SCHEDULE 13D The below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transaction. Transaction Date

July 24, 2024 SC 13D/A

APPN / Appian Corporation / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A 1 d876170dsc13da.htm SC 13D/A CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 41)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Flo

July 12, 2024 SC 13D/A

APPN / Appian Corporation / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A 1 d864481dsc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 40)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 1001

July 12, 2024 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 39 TO THE SCHEDULE 13D

EX-99.A 2 d864481dex99a.htm EX-99.A EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 39 TO THE SCHEDULE 13D The below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market, other than those denoted with an asterisk, which were block trades. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and

July 9, 2024 SC 13D/A

APPN / Appian Corporation / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

July 9, 2024 EX-99.A

TRANSACTIONS EFFECTED IN THE LAST 60 DAYS

EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED IN THE LAST 60 DAYS The below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market, other than those denoted with an asterisk, which were block trades. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transaction. Transaction D

June 10, 2024 8-K

Submission of Matters to a Vote of Security Holders

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): June 10, 2024 (June 6, 2024) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Co

May 2, 2024 EX-10.1

Previously filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on May 2, 2024, and incorporated herein by reference.

Exhibit 10.1 JOINDER, CONSENT AND FOURTH AMENDMENT TO CREDIT AGREEMENT This Joinder, Consent and Fourth Amendment to Credit Agreement (this “Amendment”) is made effective as of February 12, 2024 (the “Fourth Amendment Effective Date”), by and among Appian Corporation, a Delaware corporation (the “Borrower”), the lenders identified on the signature pages hereto (the “Lenders”), Silicon Valley Bank,

May 2, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

May 2, 2024 EX-10.2

Filed herewith.

Exhibit 10.2 FIFTH AMENDMENT TO CREDIT AGREEMENT This Fifth Amendment to Credit Agreement (this “Amendment”) is made effective as of March 12, 2024 (the “Fifth Amendment Effective Date”), by and among Appian Corporation, a Delaware corporation (the “Borrower”), the lenders identified on the signature pages hereto (the “Lenders”), Silicon Valley Bank, a division of First-Citizens Bank & Trust Compa

May 2, 2024 EX-99.1

Appian Announces First Quarter 2024 Financial Results First quarter cloud subscription revenue increased 24% year-over-year to $86.6 million

Exhibit 99.1 Appian Announces First Quarter 2024 Financial Results First quarter cloud subscription revenue increased 24% year-over-year to $86.6 million McLean, VA – May 2, 2024 – Appian (Nasdaq: APPN) today announced financial results for the first quarter ended March 31, 2024. “Appian continues to push technological boundaries in our industry, from AI-backed services to process mining. Organiza

May 2, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Num

April 25, 2024 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 25, 2024 DEF 14A

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 16, 2024 8-K

Results of Operations and Financial Condition

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

April 15, 2024 SC 13G

APPN / Appian Corporation / HAWK RIDGE CAPITAL MANAGEMENT LP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Appian Corp CL A ORD (Name of Issuer) Common Stock, (Title of Class of Securities) 03782L101 (CUSIP Number) April 4, 2024 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuant to which this Schedu

March 29, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Results of Operations and Financial Condition, Other Events

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation)

March 12, 2024 8-K

Other Events

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 12, 2024 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

February 23, 2024 SC 13D/A

APPN / Appian Corporation / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 38)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Co

February 23, 2024 EX-99.A

TRANSACTIONS EFFECTED IN THE LAST 60 DAYS

EX-99.A 2 d746806dex99a.htm EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED IN THE LAST 60 DAYS All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market, other than those denoted with an asterisk, which were block trades. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected t

February 15, 2024 EX-21.1

Filed herewith.

Exhibit 21.1 Subsidiaries of Appian Corporation Name of Subsidiary Jurisdiction of Organization Appian Europe Ltd. England and Wales Appian Software International GmbH Switzerland (Zug Canton) Appian Netherlands BV Netherlands Appian Software Australia Pty. Ltd Australia Appian France SARL France Appian Software Italy S.R.L. Italy Appian Software Germany GmbH Germany Appian Singapore Pte. Ltd. Sin

February 15, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fi

February 15, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

February 15, 2024 EX-97.1

iled herewith.

Exhibit 97 Appian Corporation Compensation Recoupment Policy (Adopted October 31, 2023) This Appian Corporation Compensation Recoupment Policy (the “Policy”) has been adopted by the Board of Directors (the “Board”) of Appian Corporation (the “Company”) on October 31, 2023.

February 15, 2024 EX-99.1

Appian Announces Fourth Quarter and Full Year 2023 Financial Results Fourth quarter cloud subscription revenue increased 26% year-over-year to $83.1 million Full year cloud subscription revenue increased 29% year-over year to $304.5 million

Exhibit 99.1 Appian Announces Fourth Quarter and Full Year 2023 Financial Results Fourth quarter cloud subscription revenue increased 26% year-over-year to $83.1 million Full year cloud subscription revenue increased 29% year-over year to $304.5 million McLean, VA – February 15, 2024 – Appian (Nasdaq: APPN) today announced financial results for the fourth quarter and full year ended December 31, 2

February 14, 2024 SC 13G/A

APPN / Appian Corporation / CITADEL ADVISORS LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 1)* Appian Corporation (Name of Issuer) Class A common stock, par value $0.0001 per share (the “Shares”) (Title of Class of Securities) 03782L1

February 13, 2024 SC 13G/A

APPN / Appian Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0310-appiancorporationclas.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: Appian Corporation Class A Title of Class of Securities: Common Stock CUSIP Number: 03782L101 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box

December 14, 2023 SC 13D/A

APPN / Appian Corp - Class A / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A 1 d597131dsc13da.htm SC 13D/A CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 37)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Flo

December 14, 2023 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 36 TO THE SCHEDULE 13D

EX-99.A 2 d597131dex99a.htm EXHIBIT A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 36 TO THE SCHEDULE 13D The Reporting Persons sold an aggregate of 750,000 shares of Common Stock in a block trade at a price per share of $35.30. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactio

November 17, 2023 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 tm2331049d1ex99-1.htm EXHIBIT 99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT The undersigned hereby agree that the Statement on Schedule 13G filed herewith (and any amendments thereto), relating to the Shares of Appian Corporation, a Delaware corporation, is being filed jointly with the Securities and Exchange Commission pursuant to Rule 13d-1(c) under the Securities Exchange Act of 1934, as a

November 17, 2023 SC 13G

APPN / Appian Corp - Class A / CITADEL ADVISORS LLC - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. )* Appian Corporation (Name of Issuer) Class A Common Stock, par value $0.0001 per share (the “Shares”) (Title of Class of Securities) 03782L10

November 9, 2023 SC 13D/A

APPN / Appian Corp - Class A / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A 1 d196175dsc13da.htm SC 13D/A CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 36)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Flo

November 9, 2023 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 35 TO THE SCHEDULE 13D

EX-99.A 2 d196175dex99a.htm EXHIBIT A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 35 TO THE SCHEDULE 13D All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transa

November 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

November 2, 2023 EX-10.2

Previously filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on November 2, 2023, and incorporated herein by reference.

Exhibit 10.2 Addendum No. 2 to Enterprise Kdb+ Software OEM License Agreement This Addendum No. 2 to Enterprise Kdb+ Software OEM License Agreement (“Addendum No. 1”) is entered into as of 20 August 2019 by and between Kx Systems, Inc., 45 Broadway, Floor 20, New York, NY 10006 (“Kx”) and Appian Corporation, 1875 Explorer Street, 4th Floor, Reston, Virginia 20190 (“Appian”). Effective Date: 31 Aug

November 2, 2023 EX-10.1

Filed herewith.

[***] Exhibit 10.1 Certain identified information has been excluded from the exhibit because it both (i) is not material and (ii) is the type that the company treats as private or confidential. [***] [***] Judgment Preservation Insurance Policy [***] [***] DECLARATIONS [***] [***] [***] Item 1. Named Insured: Appian Corporation Mailing Address: 7950 Jones Branch Drive, Tysons, VA 22102 Email Addre

November 2, 2023 EX-99.1

Appian Announces Third Quarter 2023 Financial Results Third quarter cloud subscription revenue increased 27% year-over-year to $77.2 million

Exhibit 99.1 Appian Announces Third Quarter 2023 Financial Results Third quarter cloud subscription revenue increased 27% year-over-year to $77.2 million McLean, VA – November 2, 2023 – Appian (Nasdaq: APPN) today announced financial results for the third quarter ended September 30, 2023. “Our private data-centric approach to AI is getting strong support from buyers,” said Matt Calkins, CEO & Foun

November 2, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fil

October 6, 2023 EX-99.A

TRANSACTIONS EFFECTED IN THE LAST SIXTY DAYS

EX-99.A 2 d557106dex99a.htm EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED IN THE LAST SIXTY DAYS All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transaction Date Transaction Type Amount o

October 6, 2023 SC 13D/A

APPN / Appian Corp - Class A / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 35)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Co

September 7, 2023 8-K

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): September 7, 2023 (September 1, 2

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): September 7, 2023 (September 1, 2023) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorpora

August 3, 2023 8-K

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

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

August 3, 2023 EX-10.1

Filed herewith.

Exhibit 10.1 THIRD AMENDMENT TO CREDIT AGREEMENT AND FIRST AMENDMENT TO GUARANTEE AND COLLATERAL AGREEMENT This Third Amendment to Credit Agreement and First Amendment to Guarantee and Collateral Agreement (this “Amendment”) is made effective as of June 13, 2023 (the “Third Amendment Effective Date”), by and among Appian Corporation, a Delaware corporation (the “Borrower”), the lenders identified

August 3, 2023 EX-99.1

Appian Announces Second Quarter 2023 Financial Results Second quarter cloud subscription revenue increased 30% year-over-year to $74.4 million

Exhibit 99.1 Appian Announces Second Quarter 2023 Financial Results Second quarter cloud subscription revenue increased 30% year-over-year to $74.4 million McLean, VA – August 3, 2023 – Appian (Nasdaq: APPN) today announced financial results for the second quarter ended June 30, 2023. “Appian is leading in AI-based process automation. Our practical and private approach to AI is garnering customer

August 3, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

June 16, 2023 8-K

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): June 16, 2023 (June 13, 2023) App

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): June 16, 2023 (June 13, 2023) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (C

June 9, 2023 SC 13G/A

APPN / Appian Corp - Class A / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: Appian Corp. Class A Title of Class of Securities: Common Stock CUSIP Number: 03782L101 Date of Event Which Requires Filing of this Statement: May 31, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rul

May 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

May 9, 2023 EX-10.1

Previously filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on May 9, 2023, and incorporated herein by reference.

Exhibit 10.1 JOINDER AND SECOND AMENDMENT TO CREDIT AGREEMENT This Joinder and Second Amendment to Credit Agreement (this “Amendment”) is made effective as of February 21, 2023 (the “Second Amendment Effective Date”), by and among Appian Corporation, a Delaware corporation (the “Borrower”), the lenders identified on the signature pages hereto (the “Lenders”), Silicon Valley Bank (“SVB”), as admini

May 9, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Num

May 9, 2023 EX-99.1

Appian Announces First Quarter 2023 Financial Results First quarter cloud subscription revenue increased 31% year-over-year to $69.7 million

Exhibit 99.1 Appian Announces First Quarter 2023 Financial Results First quarter cloud subscription revenue increased 31% year-over-year to $69.7 million McLean, VA – May 9, 2023 – Appian (Nasdaq: APPN) today announced financial results for the first quarter ended March 31, 2023. “Appian grew cloud subscription revenue 31% in the first quarter 2023. Organizations can manage their entire process li

April 28, 2023 DEF 14A

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 28, 2023 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 29, 2023 EX-99.1

Appian Response to Pega's Legal Appeal

Exhibit 99.1 Appian Response to Pega's Legal Appeal SUMMARY We’ve filed our brief (responding to Pegasystems’ appellate brief) in the Virginia Court of Appeals. Pega’s brief omits key facts presented to the jury and offers what we believe is a misleading version of the case and the law. Our brief sets things straight. It explains the evidence that helped the jury determine Pega willfully and malic

March 29, 2023 8-K

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, 2023 Appian Corporation

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, 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

March 13, 2023 8-K

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 13, 2023 Appian Corporation

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 13, 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

February 17, 2023 8-K

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, 2023 (February 16, 2

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, 2023 (February 16, 2023) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorpora

February 16, 2023 EX-99.1

Appian Announces Fourth Quarter and Full Year 2022 Financial Results Fourth quarter cloud subscription revenue increased 29% year-over-year to $65.8 million Full year cloud subscription revenue increased 32% year-over year to $236.9 million

Exhibit 99.1 Appian Announces Fourth Quarter and Full Year 2022 Financial Results Fourth quarter cloud subscription revenue increased 29% year-over-year to $65.8 million Full year cloud subscription revenue increased 32% year-over year to $236.9 million McLean, VA – February 16, 2023 – Appian (Nasdaq: APPN) today announced financial results for the fourth quarter and full year ended December 31, 2

February 16, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Fi

February 16, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

February 16, 2023 EX-10.16

Previously filed as Exhibit 10.16 to the Company’s Annual Report on Form 10-K (File No. 001-38098) filed with the Securities and Exchange Commission on February 16, 2023, and incorporated herein by reference.

Exhibit 10.16 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (“Agreement”) is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents (“Appian” or “Company”), and Pavel Zamudio-Ramires (“you” and all similar references or “employee”) (collectively, the “parties”) in consideration of employee’s at-will employment relation

February 16, 2023 EX-10.28

Previously filed as Exhibit 10.28 to the Company’s Annual Report on Form 10-K (File No. 001-38098) filed with the Securities and Exchange Commission on February 16, 2023, and incorporated herein by reference

Exhibit 10.28 JOINDER AND FIRST AMENDMENT TO CREDIT AGREEMENT This Joinder and First Amendment to Credit Agreement (this “Amendment”) is made effective as of December 13, 2022 (the “First Amendment Effective Date”), by and among Appian Corporation, a Delaware corporation (the “Borrower”), the lenders identified on the signature pages hereto (the “Lenders”), Silicon Valley Bank (“SVB”), as administ

February 16, 2023 EX-10.27

Previously filed as Exhibit 10.27 to the Company’s Annual Report on Form 10-K (File No. 001-38098) filed with the Securities and Exchange Commission on February 16, 2023, and incorporated herein by reference.

Exhibit 10.27 SENIOR SECURED CREDIT FACILITIES CREDIT AGREEMENT dated as of November 3, 2022, among APPIAN CORPORATION, as the Borrower, THE SEVERAL LENDERS FROM TIME TO TIME PARTY HERETO, and SILICON VALLEY BANK, as Administrative Agent, Issuing Lender and Swingline Lender, and Co-Documentation Agent and WELLS FARGO BANK, N.A., as Co-Documentation Agent SECTION 1 DEFINITIONS. 1 1.1 Defined Terms.

February 16, 2023 EX-21.1

Filed herewith.

Exhibit 21.1 Subsidiaries of Appian Corporation Name of Subsidiary Jurisdiction of Organization Appian Europe Ltd. England and Wales Appian Software International GmbH Switzerland (Zug Canton) Appian Netherlands BV Netherlands Appian Software Australia Pty. Ltd Australia Appian France SARL France Appian Software Italy S.R.L. Italy Appian Software Germany GmbH Germany Appian Singapore Pte. Ltd. Sin

February 9, 2023 SC 13G/A

APPN / Appian Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6)* Name of issuer: Appian Corp. Class A Title of Class of Securities: Common Stock CUSIP Number: 03782L101 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 9, 2023 SC 13G/A

APPN / Appian Corp / Calkins Matthew W - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule purs

January 26, 2023 SC 13D/A

APPN / Appian Corp / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A 1 d415686dsc13da.htm SC 13D/A CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 34)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Flo

January 26, 2023 EX-99.B

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 33 TO THE SCHEDULE 13D

EX-99.B 3 d415686dex99b.htm EX-99.B CUSIP No. 03782L101 EXHIBIT B TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 33 TO THE SCHEDULE 13D All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transact

January 26, 2023 EX-99.A

AMENDMED AGREEMENT REGARDING THE JOINT FILING OF SCHEDULE 13D

EX-99.A 2 d415686dex99a.htm EX-99.A CUSIP No. 03782L101 EXHIBIT A AMENDMED AGREEMENT REGARDING THE JOINT FILING OF SCHEDULE 13D The undersigned hereby agree that the statement on Schedule 13D to which this Agreement is annexed as Exhibit A, and any further amendments thereto, is and will be filed on behalf of each of them in accordance with the provisions of Rule 13d-1(k) under the Securities Exch

January 23, 2023 8-K

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): January 23, 2023 Appian Corporati

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): January 23, 2023 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fil

January 23, 2023 EX-99.1

Hello, All.

Exhibit 99.1 Hello, All. Appian hasn't said much in public about our win over Pega in last year's espionage trial. Pega, meanwhile, has talked a lot about it, mostly spin about how it's no big deal. ('[Companies] get sued all the time' says their CEO, as if everybody gets caught violating the VA Computer Crimes Act.) I think it's time we laid out the facts. DETAILS Pega doesn't come out of this lo

January 19, 2023 SC 13D/A

APPN / Appian Corp / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

SC 13D/A CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 33)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Co

January 19, 2023 EX-99.A

TRANSACTIONS EFFECTED IN THE LAST SIXTY DAYS

EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED IN THE LAST SIXTY DAYS All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transaction Date Transaction Type Amount of Securities Price Per Share

November 14, 2022 8-K

Other Events

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 14, 2022 (November 9, 2022) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporat

November 14, 2022 EX-99.A

TRANSACTIONS EFFECTED IN THE LAST SIXTY DAYS

EX-99.A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED IN THE LAST SIXTY DAYS All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transaction Date Transaction Type Amount of Securities Price Per Share

November 14, 2022 SC 13D/A

APPN / Appian Corp / Abdiel Qualified Master Fund LP - AMENDMENT NO. 32 TO SCHEDULE 13D Activist Investment

Amendment No. 32 to Schedule 13D CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 32)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New

November 3, 2022 EX-10.1

Previously filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on November 3, 2022, and incorporated herein by reference.

Exhibit 10.1 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (?Agreement?) is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents (?Appian? or ?Company?), and Christopher Jones (?you? and all similar references or ?employee?) (collectively, the ?parties?) in consideration of employee?s at-will employment relationship

November 3, 2022 EX-99.1

Appian Announces Third Quarter 2022 Financial Results Third quarter cloud subscription revenue increased 30% year-over-year to $60.6 million

Exhibit 99.1 Appian Announces Third Quarter 2022 Financial Results Third quarter cloud subscription revenue increased 30% year-over-year to $60.6 million McLean, VA ? November 3, 2022 ? Appian (Nasdaq: APPN) today announced financial results for the third quarter ended September 30, 2022. ?In Q3, total revenue exceeded guidance. On a constant currency basis, both cloud subscription revenue and tot

November 3, 2022 8-K

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 Corporati

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 Fil

November 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

August 5, 2022 EX-99.1

Appian Announces Second Quarter 2022 Financial Results Second quarter cloud subscription revenue increased 34% year-over-year to $57.1 million

Exhibit 99.1 Appian Announces Second Quarter 2022 Financial Results Second quarter cloud subscription revenue increased 34% year-over-year to $57.1 million McLean, VA ? August 4, 2022 ? Appian (Nasdaq: APPN) today announced financial results for the second quarter ended June 30, 2022. "Appian grew cloud subscription revenue 34% in Q2, exceeding our guidance. Appian's loyal customers, broad partner

August 5, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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

August 4, 2022 EX-10.1

Previously filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on August 4, 2022, and incorporated herein by reference.

Exhibit 10.1 CONSULTANT AGREEMENT This Consultant Agreement ("Agreement") is between Appian Corporation, located at 7950 Jones Branch Drive, McLean, Virginia 22102 (?Appian?), and Bill McCarthy (?Consultant?). This Agreement shall be effective as of the last date this Agreement is signed in the signature block below (?Effective Date?). Appian and Consultant may be individually referred to as a Par

August 4, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

June 10, 2022 EX-99.1

June 8, 2022

Exhibit 99.1 June 8, 2022 Michael Mulligan Chairman, Compensation Committee Appian Corporation 7950 Jones Branch Drive McLean, VA 22182 Dear Mike: I have been informed that, at the recommendation of the Compensation Committee, the Board will be taking into consideration an award to me of an option to purchase 700,000 shares of Appian that will fully vest only if Appian?s share price rises to an av

June 10, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): June 10, 2022 (June 7, 2022) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Co

May 25, 2022 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 30 TO THE SCHEDULE 13D

CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 30 TO THE SCHEDULE 13D All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transaction Date Transaction Type Amount of

May 25, 2022 SC 13D/A

APPN / Appian Corp / Abdiel Qualified Master Fund LP - AMENDMENT NO. 31 Activist Investment

Amendment No. 31 CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 31)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016

May 17, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Results of Operations and Financial Condition, Other Events

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 Nu

May 17, 2022 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

May 11, 2022 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 29 TO THE SCHEDULE 13D

EX-A CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 29 TO THE SCHEDULE 13D All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transaction Date Transaction Type Amoun

May 11, 2022 SC 13D/A

APPN / Appian Corp / Abdiel Qualified Master Fund LP - SC 13D/A Activist Investment

CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 30)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Colin T. Mo

May 10, 2022 8-K

Other Events

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 10, 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 Nu

May 9, 2022 SC 13D/A

APPN / Appian Corp / Abdiel Qualified Master Fund LP - AMENDMENT NO. 29 TO SCHEDULE 13D Activist Investment

AMENDMENT NO. 29 TO SCHEDULE 13D CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 29)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New

May 9, 2022 EX-99.A

TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 28 TO THE SCHEDULE 13D

CUSIP No. 03782L101 EXHIBIT A TRANSACTIONS EFFECTED SINCE THE FILING OF AMENDMENT NO. 28 TO THE SCHEDULE 13D All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transaction Date Transaction Type Amount of

May 5, 2022 SC 13D/A

APPN / Appian Corp / Abdiel Qualified Master Fund LP - AMENDMENT NO. 28 TO SCHEDULE 13D Activist Investment

CUSIP No. 03782L101 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 28)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Colin T. Mo

May 5, 2022 EX-99.1

Appian Announces First Quarter 2022 Financial Results First quarter cloud subscription revenue increased 37% year-over-year to $53.4 million

Exhibit 99.1 Appian Announces First Quarter 2022 Financial Results First quarter cloud subscription revenue increased 37% year-over-year to $53.4 million McLean, VA – May 5, 2022 – Appian (Nasdaq: APPN) today announced financial results for the first quarter ended March 31, 2022. “We exceeded guidance and grew cloud subscription revenue by 37% in Q1. Our annual conference was well-attended and ful

May 5, 2022 EX-10.2

Previously filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on May 5, 2022, and incorporated herein by reference.

Exhibit 10.2 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (“Agreement”) is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents (“Appian” or “Company”), and Mark Matheos (“you” and all similar references or “employee”) (collectively, the “parties”) in consideration of employee’s at-will employment relationship with

May 5, 2022 EX-99.A

Transactions Effected in the Last Sixty Days

CUSIP No. 03782L101 EXHIBIT A Transactions Effected in the Last Sixty Days All of the below transactions in the Common Stock were traded in the ordinary course on the NASDAQ Stock Market. Abdiel Capital Advisors, LP serves as the investment manager of Abdiel Qualified Master Fund, LP and effected the below transactions. Transaction Date Transaction Type Amount of Securities Price Per Share 03/07/2

May 5, 2022 EX-10.1

SECOND LOAN MODIFICATION AGREEMENT

Exhibit 10.1 SECOND LOAN MODIFICATION AGREEMENT This Second Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of January 28, 2022, by and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 1200 17th St. 16th Floor, Denver, Color

May 5, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

May 5, 2022 EX-24

POWER OF ATTORNEY

POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints each of Christopher Winters, Angela Patterson, Nicole Brookshire, Mark Ballantyne and Jason Minio, signing individually, the undersigned’s true and lawful attorneys-in fact and agents to: (1)execute for and on behalf of the undersigned, in the undersigned’s capacity as an officer, director or benefic

May 5, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Num

April 26, 2022 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 26, 2022 DEF 14A

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 4, 2022 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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 4, 2022 (April 1, 2022) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (C

April 4, 2022 EX-99.1

Appian Names Mark Matheos as Chief Financial Officer

Exhibit 99.1 Appian Names Mark Matheos as Chief Financial Officer McLean, VA ? April 4, 2022 ? Appian (NASDAQ: APPN) today announced the appointment of Mark Matheos to the position of Appian Chief Financial Officer, effective as of April 1, 2022. He reports directly to Matt Calkins, CEO of Appian. Matheos has more than 20 years of proven financial operations expertise, including over 5 years with

February 17, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Fi

February 17, 2022 EX-21.1

Filed herewith.

Exhibit 21.1 Subsidiaries of Appian Corporation Name of Subsidiary Jurisdiction of Organization Appian Europe Ltd. England and Wales Appian Software International LLC Switzerland (Zug Canton) Appian Netherlands BV Netherlands Appian Software Australia Pty Ltd Australia Appian France SARL France Appian Software Italy S.R.L. Italy Appian Software Germany GmbH Germany Appian Singapore Pte. Ltd. Singa

February 17, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

February 17, 2022 EX-99.1

Appian Announces Fourth Quarter and Full Year 2021 Financial Results Fourth quarter cloud subscription revenue increased 39% year-over-year to $51.2 million Full year cloud subscription revenue increased 39% year-over-year to $179.4 million

Exhibit 99.1 Appian Announces Fourth Quarter and Full Year 2021 Financial Results Fourth quarter cloud subscription revenue increased 39% year-over-year to $51.2 million Full year cloud subscription revenue increased 39% year-over-year to $179.4 million McLean, VA ? February 17, 2022 ? Appian (Nasdaq: APPN) today announced financial results for the fourth quarter and full year ended December 31, 2

February 17, 2022 EX-4.3

Previously filed as Exhibit 4.3 to the Company’s Annual Report on 10-K (File No. 001-38098), filed with the Securities and Exchange Commission on February 17, 2022, and incorporated herein by reference.

Exhibit 4.3 DESCRIPTION OF THE REGISTRANT?S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 Appian Corporation (?we,? ?us? and ?our?) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended: our Class A common stock, par value $0.0001 per share. The following summary description of our Class A common stock is no

February 17, 2022 EX-10.21

Previously filed as Exhibit 10.21 to the Company's Annual Report on Form 10-K (File No. 001-38098), filed with the Securities and Exchange Commission on February 17, 2022, and incorporated herein by reference.

Exhibit 10.21 THIRD AMENDMENT TO DEED OF LEASE This THIRD amendment TO DEED OF lease (this ?Amendment?) is entered into as of the 30th day of November, 2021 (the ?Effective Date?) by and between TAMARES 7950 OWNER LLC, a Delaware limited liability company, having an office c/o Tamares Real Estate Holdings, Inc., 1500 Broadway, 24th Floor, New York, New York 10036 (?Landlord?), and APPIAN CORPORATI

February 17, 2022 EX-10.24

Filed herewith.

Exhibit 10.24 FIRST LOAN MODIFICATION AGREEMENT This First Loan Modification Agreement (this ?Loan Modification Agreement?) is entered into as of December 30, 2021, by and between SILICON VALLEY BANK, a California corporation, with its principal place of business at 3003 Tasman Drive, Santa Clara, California 95054 and with a loan production office located at 1200 17th St. 16th Floor, Denver, Color

February 17, 2022 EX-10.22

Previously filed as Exhibit 10.22 to the Company's Annual Report on Form 10-K (File No. 001-38098), filed with the Securities and Exchange Commission on February 17, 2022, and incorporated herein by reference.

Exhibit 10.22 AGREEMENT OF SUBLEASE THIS AGREEMENT OF SUBLEASE (hereinafter referred to as the ?Sublease?) is made and entered into this 30th day of November, 2021 (?Effective Date?), by and between APPIAN CORPORATION, a Delaware corporation (hereinafter referred to as the "Sublessor"), and OCTAGON, INC., a District of Columbia corporation (hereinafter referred to as the "Sublessee"). WITNESSETH:

February 9, 2022 SC 13G/A

APPN / Appian Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 5)* Name of issuer: Appian Corp. Class A Title of Class of Securities: Common Stock CUSIP Number: 03782L101 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

January 19, 2022 SC 13G/A

APPN / Appian Corp / Calkins Matthew W - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule purs

January 4, 2022 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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): January 4, 2022 (December 30, 2021) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporati

December 7, 2021 EX-99.1

Appian Announces Planned Retirement of CFO, Mark Lynch, and Reaffirms Guidance for Q4 and Full Year 2021

Exhibit 99.1 Appian Announces Planned Retirement of CFO, Mark Lynch, and Reaffirms Guidance for Q4 and Full Year 2021 McLean, Va., Dec. 03, 2021 ? Appian (NASDAQ: APPN), today announced that Mark Lynch intends to retire from his role as Chief Financial Officer effective March 31, 2022. Mr. Lynch will remain in his current position through March 31, 2022, to assist with the filing and certification

December 7, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): December 7, 2021 (December 1, 2021) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporati

November 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

November 4, 2021 EX-99.1

Appian Announces Third Quarter 2021 Financial Results Cloud subscription revenue increased 36% year-over-year to $46.7 million Subscriptions revenue increased 32% year-over-year to $67.2 million

Exhibit 99.1 Appian Announces Third Quarter 2021 Financial Results Cloud subscription revenue increased 36% year-over-year to $46.7 million Subscriptions revenue increased 32% year-over-year to $67.2 million McLean, VA ? November 4, 2021 ? Appian (Nasdaq: APPN) today announced financial results for the third quarter ended September 30, 2021. ?Appian's cloud subscription revenue grew 36%, which is

November 4, 2021 EX-10.1

Previously filed as Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on November 4, 2021, and incorporated herein by reference.

Exhibit 10.1 Agreement on the Sale and Transfer of Shares relating to Lana Labs GmbH Parties 1. Karibu Capital UG (haftungsbeschr?nkt), a limited liability company under the laws of Germany, with registered office in Berlin, registered with the commercial register at the local court of Charlottenburg under HRB 176244 B, - hereinafter ?Seller 1? - 2. Thobai UG (haftungsbeschr?nkt), a limited liabil

November 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 4, 2021 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fil

September 2, 2021 S-8

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT THE SECURITIES ACT OF 1933 APPIAN CORPORATION (Exact name of registrant as specified in its charter)

As filed with the Securities and Exchange Commission on September 2, 2021 Registration No.

August 18, 2021 EX-4.5

Filed herewith.

EXHIBIT 4.5 Appian Corporation and , As Warrant Agent Form of Debt Securities Warrant Agreement Dated As Of APPIAN CORPORATION. FORM OF DEBT SECURITIES WARRANT AGREEMENT THIS DEBT SECURITIES WARRANT AGREEMENT (this ?Agreement?), dated as of [?], between APPIAN CORPORATION, a Delaware corporation (the ?Company?), and [?], a [corporation] [national banking association] organized and existing under t

August 18, 2021 EX-4.4

Filed herewith.

EXHIBIT 4.4 APPIAN CORPORATION and , As Warrant Agent Form of Class A Common Stock Warrant Agreement Dated As Of APPIAN CORPORATION FORM OF CLASS A COMMON STOCK WARRANT AGREEMENT THIS CLASS A COMMON STOCK WARRANT AGREEMENT (this ?Agreement?), dated as of [?], between APPIAN CORPORATION, a Delaware corporation (the ?Company?), and [?], a [corporation] [national banking association] organized and ex

August 18, 2021 EX-4.2

Filed herewith.

EXHIBIT 4.2 APPIAN CORPORATION Issuer AND [TRUSTEE], Trustee INDENTURE Dated as of [?], 20 Debt Securities TABLE OF CONTENTS PAGE ARTICLE 1 DEFINITIONS 1 Section 1.01 Definitions of Terms. 1 ARTICLE 2 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES 5 Section 2.01 Designation and Terms of Securities. 5 Section 2.02 Form of Securities and Trustee?s Certificate. 8 Sectio

August 18, 2021 S-3ASR

As filed with the Securities and Exchange Commission on August 18, 2021

As filed with the Securities and Exchange Commission on August 18, 2021 Registration No.

August 5, 2021 EX-99.1

Appian Announces Second Quarter 2021 Financial Results Cloud subscription revenue increased 44% year-over-year to $42.5 million Subscriptions revenue increased 37% year-over-year to $56.9 million

Exhibit 99.1 Appian Announces Second Quarter 2021 Financial Results Cloud subscription revenue increased 44% year-over-year to $42.5 million Subscriptions revenue increased 37% year-over-year to $56.9 million McLean, VA ? August 5, 2021 ? Appian (Nasdaq: APPN) today announced financial results for the second quarter ended June 30, 2021. ?In Q2, Appian increased cloud subscription revenue by 44% an

August 5, 2021 EX-10.1

Previously filed as Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on August 5, 2021, and incorporated herein by reference.

Exhibit 10.1 APPIAN CORPORATION EMPLOYEE STOCK PURCHASE PLAN ARTICLE 1 PURPOSE The purpose of the Appian Corporation Employee Stock Purchase Plan (as amended from time to time, the ?Plan?) is to allow eligible employees of Appian Corporation and its affiliates (the ?Company?) to purchase shares of Class A Common Stock (?shares?) of the Company with payroll deductions and matching employer contribu

August 5, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 5, 2021 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

August 5, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

June 16, 2021 8-K

Submission of Matters to a Vote of Security Holders

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): June 16, 2021 (June 11, 2021) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (C

June 1, 2021 DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__)

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

May 6, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

May 6, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 6, 2021 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Num

May 6, 2021 EX-99.1

Appian Announces First Quarter 2021 Financial Results Cloud subscription revenue increased 38% year-over-year to $39.1 million Subscriptions revenue increased 26% year-over-year to $63.8 million

Exhibit 99.1 Appian Announces First Quarter 2021 Financial Results Cloud subscription revenue increased 38% year-over-year to $39.1 million Subscriptions revenue increased 26% year-over-year to $63.8 million McLean, VA ? May 6, 2021 ? Appian (Nasdaq: APPN) today announced financial results for the first quarter ended March 31, 2021. ?Once again, we exceeded our guidance, grew cloud subscription re

April 29, 2021 DEFA14A

- DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 29, 2021 DEF 14A

- DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 4)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 4)* Name of issuer: Appian Corp. Class A Title of Class of Securities: Common Stock CUSIP Number: 03782L101 Date of Event Which Requires Filing of this Statement: February 26, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 18, 2021 EX-10.3

Previously filed as Exhibit 10.3 to the Company’s Annual Report on 10-K (File No. 001-38098), filed with the Securities and Exchange Commission on February 18, 2021, and incorporated herein by reference.

Exhibit 10.3 APPIAN CORPORATION NON-EMPLOYEE DIRECTOR COMPENSATION POLICY APPROVED BY THE BOARD OF DIRECTORS AS AMENDED DECEMBER 16, 2020 Each member of the Board of Directors (the ?Board?) who is not also serving as an employee of Appian Corporation (the ?Company?) or any of its subsidiaries (each such member, an ?Eligible Director?) will receive the compensation described in this Non-Employee Di

February 18, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 18, 2021 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fi

February 18, 2021 EX-21.1

Filed herewith.

Exhibit 21.1 Subsidiaries of Appian Corporation Name of Subsidiary Jurisdiction of Organization Appian Europe Ltd. England and Wales Appian Software International LLC Switzerland (Zug Canton) Appian Netherlands BV Netherlands Appian Software Australia PTY Ltd Australia Appian France SARL France Appian Software Italy SRL Italy Appian Software Germany GmbH Germany Appian Singapore Pte. Ltd. Singapor

February 18, 2021 EX-99.1

Appian Announces Fourth Quarter and Full Year 2020 Financial Results Fourth quarter cloud subscription revenue increased 40% year-over-year to $36.9 million Full year cloud subscription revenue increased 36% year-over-year to $129.2 million

Exhibit 99.1 Appian Announces Fourth Quarter and Full Year 2020 Financial Results Fourth quarter cloud subscription revenue increased 40% year-over-year to $36.9 million Full year cloud subscription revenue increased 36% year-over-year to $129.2 million McLean, VA – February 18, 2021 – Appian (Nasdaq: APPN) today announced financial results for the fourth quarter and full year ended December 31, 2

February 18, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

February 12, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) (

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule purs

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Appian Corp. Class A Title of Class of Securities: Common Stock CUSIP Number: 03782L101 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 1, 2021 SC 13D/A

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 27)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of

AMENDMENT NO. 27 TO SCHEDULE 13D SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 27)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Colin T. Mor

December 3, 2020 SC 13D/A

APPN / Appian Corp. / Abdiel Qualified Master Fund LP - AMENDMENT NO. 26 TO SCHEDULE 13D Activist Investment

AMENDMENT NO. 26 TO SCHEDULE 13D SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 26)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Colin T. Mor

November 5, 2020 EX-99.1

Appian Announces Third Quarter 2020 Financial Results Cloud subscription revenue increased 40% year-over-year to $34.3 million Subscriptions revenue increased 34% year-over-year to $50.8 million

Exhibit 99.1 Appian Announces Third Quarter 2020 Financial Results Cloud subscription revenue increased 40% year-over-year to $34.3 million Subscriptions revenue increased 34% year-over-year to $50.8 million McLean, VA – November 5, 2020 – Appian (Nasdaq: APPN) today announced financial results for the third quarter ended September 30, 2020. “We exceeded our guidance, grew cloud subscription reven

November 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

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 5, 2020 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fil

November 5, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

August 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

August 6, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 6, 2020 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

August 6, 2020 EX-99.1

Appian Announces Second Quarter 2020 Financial Results Cloud subscriptions revenue increased 30% year-over-year to $29.6 million

Exhibit 99.1 Appian Announces Second Quarter 2020 Financial Results Cloud subscriptions revenue increased 30% year-over-year to $29.6 million McLean, VA – August 6, 2020 – Appian (Nasdaq: APPN) today announced financial results for the second quarter ended June 30, 2020. “Recent circumstances have demonstrated the importance of quick adaptability. Organizations are turning to rapid-development tec

August 6, 2020 EX-10.1

to the Company's Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on

Exhibit 10.1 SEPARATION AGREEMENT AND GENERAL RELEASE AGREEMENT made this 1st of May 2020, by and between Appian Corporation (“Appian”) and David Mitchell (“Employee”). WHEREAS, Appian and Employee mutually desire to reach an agreement as to the rights, benefits and obligations of Appian and Employee concerning Employee’s employment with Appian and the Employee’s separation from employment with Ap

August 6, 2020 EX-10.2

Previously filed as Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on August 6, 2020, and incorporated herein by reference.

Exhibit 10.2 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (“Agreement”) is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents (“Appian” or “Company”), and Eric Cross (“you” and all similar references or “employee”) (collectively, the “parties”) in consideration of employee’s at-will employment relationship with Ap

June 12, 2020 8-K

Submission of Matters to a Vote of Security Holders

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): June 12, 2020 (June 9, 2020) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Co

June 1, 2020 EX-1.1

Underwriting Agreement, dated May 28, 2020, by and among Appian Corporation, Morgan Stanley & Co. LLC and certain selling stockholders named therein.

Exhibit 1.1 2,500,000 Shares APPIAN CORPORATION CLASS A COMMON STOCK, PAR VALUE $0.0001 PER SHARE UNDERWRITING AGREEMENT May 28, 2020 May 28, 2020 Morgan Stanley & Co. LLC 1585 Broadway New York, New York 10036 Ladies and Gentlemen: Appian Corporation, a Delaware corporation (the “Company”) proposes to issue and sell to the several Underwriters named in Schedule I hereto (the “Underwriters”), and

June 1, 2020 EX-99.1

Appian Announces Proposed Public Offering of Class A Common Stock

Exhibit 99.1 Appian Announces Proposed Public Offering of Class A Common Stock MCLEAN, VA, May 28, 2020 – Appian Corporation (Nasdaq: APPN) today announced the launch of a proposed underwritten public offering of 2,500,000 shares of its Class A common stock, of which 1,931,206 shares of Class A common stock are being offered by Appian and 568,794 shares of Class A common stock are being offered by

June 1, 2020 424B5

CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Amount Registered Proposed Maximum Offering Price Per Unit Proposed Maximum Aggregate Offering Price Amount of Registration Fee(1) Class A common stock, par value $0.0

424B5 Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-226941 CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Amount Registered Proposed Maximum Offering Price Per Unit Proposed Maximum Aggregate Offering Price Amount of Registration Fee(1) Class A common stock, par value $0.0001 2,500,000 $56.50 $141,250,000 $18,334.25 (1) The registration

June 1, 2020 8-K

Financial Statements and Exhibits, Other Events

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): June 1, 2020 (May 28, 2020) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Com

May 28, 2020 424B5

Subject to Completion, dated May 28, 2020

424B5 Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-226941 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any state where the offer or sale is not permitte

May 7, 2020 EX-10.2

Previously filed as Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on May 7, 2020, and incorporated herein by reference.

Exhibit 10.2 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT ("Agreement") is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents ("Appian" or "Company"), and Bob Kramer ("you" and all similar references or "employee") (collectively, the "parties") in consideration of employee's at-will employment relationship with Ap

May 7, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 7, 2020 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Num

May 7, 2020 EX-10.3

to the Company's Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on May 7, 2020, and incorporated herein by reference.

Exhibit 10.3 APPIAN CORPORATION EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (“Agreement”) is made by and between APPIAN CORPORATION, a Delaware corporation, and its affiliates, successors, assigns and agents (“Appian” or “Company”), and David Mitchell (“you” and all similar references or “employee”) (collectively, the “parties”) in consideration of employee’s at-will employment relationship wit

May 7, 2020 EX-99.1

Appian Announces First Quarter 2020 Financial Results Subscriptions revenue increased 46% year-over-year to $50.4 million Total revenue increased 31% year-over-year to $78.9 million

Exhibit 99.1 Appian Announces First Quarter 2020 Financial Results Subscriptions revenue increased 46% year-over-year to $50.4 million Total revenue increased 31% year-over-year to $78.9 million McLean, VA – May 7, 2020 – Appian (Nasdaq: APPN) today announced financial results for the first quarter ended March 31, 2020. "Appian is a platform for change. We've helped businesses around the world ada

May 7, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

April 28, 2020 DEFA14A

- DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 28, 2020 DEF 14A

Schedule 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

February 20, 2020 EX-99.1

Appian Announces Fourth Quarter and Full Year 2019 Financial Results Full year subscription revenue increased 34% year-over-year to $155.1 million Full year total revenue increased 17% year-over-year to $266.3 million

Exhibit 99.1 Appian Announces Fourth Quarter and Full Year 2019 Financial Results Full year subscription revenue increased 34% year-over-year to $155.1 million Full year total revenue increased 17% year-over-year to $266.3 million Tysons, VA – February 20, 2020 – Appian (Nasdaq: APPN) today announced financial results for the fourth quarter and full year ended December 31, 2019. "For the full year

February 20, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 20, 2020 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fi

February 20, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

February 20, 2020 EX-4.3

Previously filed as Exhibit 4.3 to the Company's Annual Report on Form 10-K (File No. 001-38098), filed with the Securities and Exchange Commission on February 20, 2020, and incorporated herein by reference.

Exhibit 4.3 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2019, Appian Corporation (“we,” “us” and “our”) had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended: our Class A common stock, par value $0.0001 per share. The following summary description of our C

February 20, 2020 EX-21.1

Subsidiaries of Appian Corporation

Exhibit 21.1 Subsidiaries of Appian Corporation Name of Subsidiary Jurisdiction of Organization Appian Europe Ltd. England and Wales Appian Software International LLC Switzerland (Zug Canton) Appian Netherlands BV Netherlands Appian Software Australia PTY Ltd Australia Appian France SARL France Appian Software Italy SRL Italy Appian Software Germany GmbH Germany Appian Singapore Pte. Ltd. Singapor

February 20, 2020 EX-10.15

Previously filed as Exhibit 10.15 to the Company's Annual Report on Form 10-K (File No. 001-38098), filed with the Securities and Exchange Commission on February 20, 2020, and incorporated herein by reference.

Exhibit 10.15 FIRST AMENDMENT TO DEED OF LEASE This FIRST amendment TO DEED OF lease (this “Amendment”) is entered into as of the 23rd day of December, 2019 (the “Effective Date”) by and between TAMARES 7950 OWNER LLC, a Delaware limited liability company, having an office c/o Tamares Real Estate Holdings, Inc., 1500 Broadway, 24th Floor, New York, New York 10036 (“Landlord”), and APPIAN CORPORATI

February 20, 2020 EX-10.16

Previously filed as Exhibit 10.16 to the Company's Annual Report on Form 10-K (File No. 001-38098), filed with the Securities and Exchange Commission on February 20, 2020, and incorporated herein by reference.

SECOND AMENDMENT TO DEED OF LEASE This SECOND amendment TO DEED OF lease (this “Amendment”) is entered into as of the 1st day of January, 2020 (the “Effective Date”) by and between TAMARES 7950 OWNER LLC, a Delaware limited liability company, having an office c/o Tamares Real Estate Holdings, Inc.

February 14, 2020 SC 13G/A

APPN / Appian Corp. / Calkins Matthew W - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) December 31, 2019 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule purs

February 12, 2020 SC 13G/A

APPN / Appian Corp. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Appian Corp Title of Class of Securities: Common Stock CUSIP Number: 03782L101 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13

January 7, 2020 SC 13G

APPN / Appian Corp. / BAILLIE GIFFORD & CO Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 APPIAN CORP - (Name of Issuer) CLASS A SHARES - (Title of Class of Securities) 03782L101 - (CUSIP Number) 31 December 2019 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X] Rule 13d-1(b

October 31, 2019 EX-99.1

Appian Announces Third Quarter 2019 Financial Results Subscription revenue increased 38% year-over-year to $40.4 million Total revenue increased 26% year-over-year to $69.4 million

Exhibit 99.1 Appian Announces Third Quarter 2019 Financial Results Subscription revenue increased 38% year-over-year to $40.4 million Total revenue increased 26% year-over-year to $69.4 million Tysons, VA - October 31, 2019 - Appian (NASDAQ: APPN) today announced financial results for the third quarter ended September 30, 2019. "We exceeded our guidance once again this quarter. Our ease-of-use and

October 31, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 31, 2019 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fil

October 31, 2019 EX-10.1

Previously filed as Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q (File No. 001-38098) filed with the Securities and Exchange Commission on October 31, 2019, and incorporated herein by reference.

Exhibit 10.1 Addendum No. 1 to Enterprise Kdb+ Software OEM License Agreement This Addendum No. 1 to Enterprise Kdb+ Software OEM License Agreement (“Addendum No. 1”) is entered into as of 20 August 2019 by and between Kx Systems, Inc., 45 Broadway, Floor 20, New York, NY 10006 (“Kx”) and Appian Corporation, 1875 Explorer Street, 4th Floor, Reston, Virginia 20190 (“Appian”). 1.SCOPE OF HOSTING ADD

October 31, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

September 9, 2019 SC 13D/A

APPN / Appian Corp. / Abdiel Qualified Master Fund LP - AMENDMENT NO. 25 TO SCHEDULE 13D Activist Investment

AMENDMENT NO. 25 TO SCHEDULE 13D SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 25)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Colin T. Mor

September 6, 2019 EX-99.2

Appian Announces Pricing of Public Offering of Class A Common Stock

EX-99.2 Exhibit 99.2 Appian Announces Pricing of Public Offering of Class A Common Stock Tysons, VA, September 4, 2019 – Appian Corporation (Nasdaq: APPN) today announced the pricing of an underwritten public offering of 2,329,000 shares of its Class A common stock, of which 1,825,000 shares of Class A common stock are being offered by Appian and 504,000 shares of Class A common stock are being of

September 6, 2019 EX-1.1

Underwriting Agreement, dated September 4, 2019, by and among Appian Corporation, Barclays Capital Inc. and certain selling stockholders named therein.

EX-1.1 Exhibit 1.1 EXECUTION VERSION 2,329,000 Shares APPIAN CORPORATION CLASS A COMMON STOCK, PAR VALUE $0.0001 PER SHARE UNDERWRITING AGREEMENT September 4, 2019 September 4, 2019 Barclays Capital Inc. 745 Seventh Avenue New York, New York 10019 Ladies and Gentlemen: Appian Corporation, a Delaware corporation (the “Company”) proposes to issue and sell to the several Underwriters named in Schedul

September 6, 2019 EX-99.1

Appian Announces Proposed Public Offering of Class A Common Stock

EX-99.1 Exhibit 99.1 Appian Announces Proposed Public Offering of Class A Common Stock Tysons, VA, September 4, 2019 – Appian Corporation (Nasdaq: APPN) today announced the launch of a proposed underwritten public offering of 2,329,000 shares of its Class A common stock, of which 1,825,000 shares of Class A common stock are being offered by Appian and 504,000 shares of Class A common stock are bei

September 6, 2019 8-K

Financial Statements and Exhibits, Other Events

8-K 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): September 4, 2019 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commissio

September 6, 2019 424B5

CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Amount Registered Proposed Maximum Offering Price Per Unit(1) Proposed Maximum Aggregate Offering Price(1) Amount of Registration Fee(2) Class A common stock, par valu

424B5 Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-226941 CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Amount Registered Proposed Maximum Offering Price Per Unit(1) Proposed Maximum Aggregate Offering Price(1) Amount of Registration Fee(2) Class A common stock, par value $0.0001 2,329,000 $58.01 $135,105,290 $16,374.77 (1) Estimated

September 4, 2019 424B5

Subject to Completion, dated September 4, 2019

424B5 Table of Contents Filed pursuant to Rule 424(b)(5) Registration No. 333-226941 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any state where the offer or sale is not permitte

August 8, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 8, 2019 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File

August 8, 2019 EX-99.1

Appian Announces Second Quarter 2019 Financial Results Subscription revenue increased 41% year-over-year to $38.0 million Total revenue increased 12% year-over-year to $66.9 million

Exhibit 99.1 Appian Announces Second Quarter 2019 Financial Results Subscription revenue increased 41% year-over-year to $38.0 million Total revenue increased 12% year-over-year to $66.9 million Tysons, VA - August 8, 2019 - Appian (NASDAQ: APPN) today announced financial results for the second quarter ended June 30, 2019. "In the second quarter of 2019, Appian subscription revenue grew 41% year-o

August 8, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

June 10, 2019 8-K

Submission of Matters to a Vote of Security Holders

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): June 10, 2019 (June 6, 2019) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Co

May 24, 2019 EX-99.1

May 23, 2019

May 23, 2019 Michael Mulligan Chairman, Compensation Committee Appian Corporation 11955 Democracy Drive Reston, VA 20190 Dear Mike: I have been informed that, at the recommendation of the Compensation Committee, the Board will be taking into consideration an award to me of an option to purchase 700,000 shares of Appian that will vest only if Appian’s share price rises by two and a half times in the next five years.

May 24, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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 24, 2019 (May 23, 2019) Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Com

May 2, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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, 2019 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission File Num

May 2, 2019 EX-99.1

Appian Announces First Quarter 2019 Financial Results Subscription revenue increased 32% year-over-year to $33.6 million Total revenue increased 15% year-over-year to $59.6 million

Exhibit 99.1 Appian Announces First Quarter 2019 Financial Results Subscription revenue increased 32% year-over-year to $33.6 million Total revenue increased 15% year-over-year to $59.6 million Reston, VA - May 2, 2019 - Appian (NASDAQ: APPN) today announced financial results for the first quarter ended March 31, 2019. "We increased 2019 subscription revenue guidance due to our ability to expand w

May 2, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38098 APPIAN CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 54-1956084 (State or other jurisdiction of incorporation or organization) (I.

April 26, 2019 DEFA14A

APPN / Appian Corp. DEFA14A DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

April 26, 2019 DEF 14A

Schedule 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

February 22, 2019 SC 13D/A

APPN / Appian Corp. / Abdiel Qualified Master Fund LP - AMENDMENT NO. 24 TO SCHEDULE 13D Activist Investment

AMENDMENT NO. 24 TO SCHEDULE 13D SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13D (Rule 13d-101) UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 24)* Appian Corporation (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 03782L101 (CUSIP Number) Abdiel Capital 90 Park Avenue, 29th Floor New York, NY 10016 Attn: Colin T. Mor

February 22, 2019 EX-99.X

Information with respect to Transactions Effected During the Past Sixty Days

EXHIBIT X EXHIBIT X Information with respect to Transactions Effected During the Past Sixty Days All of the below transactions in the Common Stock were traded in the ordinary course over The NASDAQ Global Market.

February 21, 2019 EX-99.1

Appian Announces Fourth Quarter and Full Year 2018 Financial Results Fourth quarter subscription revenue increased 44% year-over-year to $33.8 million Fourth quarter total revenue increased 19% year-over-year to $60.2 million

Appian Announces Fourth Quarter and Full Year 2018 Financial Results Fourth quarter subscription revenue increased 44% year-over-year to $33.

February 21, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 21, 2019 Appian Corporation (Exact name of Registrant as Specified in Its Charter) Delaware 001-38098 54-1956084 (State or Other Jurisdiction of Incorporation) (Commission Fi

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