APPN

SEC source: 0001441683-19-000190 · wf-form4_157324812446587.xml · derivative · entry 4

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock (or its cash equivalent, at the discretion of the Issuer).

F6 · derivative.exercise_date: The RSUs were granted on October 25, 2017 and vest in five (5) equal annual installments commencing on November 5, 2018, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.

F6 · derivative.expiration_date: The RSUs were granted on October 25, 2017 and vest in five (5) equal annual installments commencing on November 5, 2018, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.

SEC source: 0001441683-19-000190 · wf-form4_157324812446587.xml · nonDerivative · entry 3

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,355

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 10, 2018.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.93 to $42.33, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4).

SEC source: 0001441683-19-000190 · wf-form4_157324812446587.xml · nonDerivative · entry 2

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,843

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 10, 2018.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.93 to $41.91, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000190 · wf-form4_157324812446587.xml · nonDerivative · entry 1

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each Restricted Stock Unit ("RSU") converts into Class A Common Stock on a one-for-one basis.

SEC source: 0001441683-19-000189 · wf-form4_157324807591398.xml · nonDerivative · entry 2

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 105,913

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.89 to $42.37, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000189 · wf-form4_157324807591398.xml · nonDerivative · entry 1

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 107,113

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.86 to $41.85, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · derivative · entry 10

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F6 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (7))

F7 · derivative.exercise_price: (continued from Footnote (6)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

F6 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (7))

F7 · derivative.exercise_date: (continued from Footnote (6)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

F6 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (7))

F7 · derivative.expiration_date: (continued from Footnote (6)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · derivative · entry 9

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F6 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (7))

F7 · derivative.exercise_price: (continued from Footnote (6)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

F6 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (7))

F7 · derivative.exercise_date: (continued from Footnote (6)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

F6 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (7))

F7 · derivative.expiration_date: (continued from Footnote (6)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · derivative · entry 8

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Class B Common Stock · 20,000 shares

Expires 2025-11-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 7, 2018, as amended.

F12 · derivative.exercise_date: This option vests in five equal annual installments commencing on November 17, 2016 and on the next four anniversaries thereof, subject to the Reporting Person's continued service to the Issuer through each vesting date.

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · derivative · entry 7

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F10 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Issuer's Class A Common Stock (or its cash equivalent, at the discretion of the Issuer).

F11 · derivative.exercise_date: The RSUs were granted on October 25, 2017 and vest in five (5) equal annual installments commencing on November 5, 2018, provided that the Reporting Person has provided continuous service to the Issuer through such vesting date.

F11 · derivative.expiration_date: The RSUs were granted on October 25, 2017 and vest in five (5) equal annual installments commencing on November 5, 2018, provided that the Reporting Person has provided continuous service to the Issuer through such vesting date.

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · nonDerivative · entry 6

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,800

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 7, 2018, as amended.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.85 to $42.34, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (9).

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · nonDerivative · entry 5

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,500

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 7, 2018, as amended.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.85 to $41.845, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (8).

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · nonDerivative · entry 4

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,800

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · kind: Pursuant to the terms of the Class B Common Stock, the Reporting Person converted shares of Class B Common Stock into shares of Class A Common Stock.

F6 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (7))

F7 · price: (continued from Footnote (6)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · nonDerivative · entry 3

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,800

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 7, 2018, as amended.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.97 to $42.34, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4).

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · nonDerivative · entry 2

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,178

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 7, 2018, as amended.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.97 to $41.96, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000192 · wf-form4_157324824056589.xml · nonDerivative · entry 1

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,900

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each Restricted Stock Unit ("RSU") converts into Class A Common Stock on a one-for-one basis.

SEC source: 0001441683-19-000183 · wf-form4_157255828663836.xml · derivative · entry 1

Lynch Mark Steven · CIK 0001707384 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,990

Underlying: Class A Common Stock · 22,610 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer's Class A Common Stock (or its cash equivalent, at the discretion of the Issuer).

F2 · derivative.exercise_date: The RSUs will vest in five (5) equal annual installments commencing on the one-year anniversary of November 5, 2019, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.

F2 · derivative.expiration_date: The RSUs will vest in five (5) equal annual installments commencing on the one-year anniversary of November 5, 2019, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.

SEC source: 0001441683-19-000182 · wf-form4_157255823056414.xml · derivative · entry 1

Winters Christopher · CIK 0001706796 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,305

Underlying: Class A Common Stock · 11,305 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer's Class A Common Stock (or its cash equivalent, at the discretion of the Issuer).

F2 · derivative.exercise_date: The RSUs will vest in five (5) equal annual installments commencing on the one-year anniversary of November 5, 2019, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.

F2 · derivative.expiration_date: The RSUs will vest in five (5) equal annual installments commencing on the one-year anniversary of November 5, 2019, provided that the Reporting Person has provided continuous service to the Issuer through the vesting date.

SEC source: 0001441683-19-000167 · wf-form4_157134274400414.xml · nonDerivative · entry 4

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 108,913

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.64 to $49.03, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (5).

SEC source: 0001441683-19-000167 · wf-form4_157134274400414.xml · nonDerivative · entry 3

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 109,190

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.11 to $47.49, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4).

SEC source: 0001441683-19-000167 · wf-form4_157134274400414.xml · nonDerivative · entry 2

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 109,590

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.10 to $47.05, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000167 · wf-form4_157134274400414.xml · nonDerivative · entry 1

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 110,582

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.98 to $45.91, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

SEC source: 0001441683-19-000165 · wf-form4_157065178451026.xml · nonDerivative · entry 2

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 10, 2018.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.45 to $47.44, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000165 · wf-form4_157065178451026.xml · nonDerivative · entry 1

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,032

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 10, 2018.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.45 to $48.28, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

SEC source: 0001441683-19-000163 · wf-form4_157004896584816.xml · nonDerivative · entry 3

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 111,913

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.60 to $47.65, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4).

SEC source: 0001441683-19-000163 · wf-form4_157004896584816.xml · nonDerivative · entry 2

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 112,428

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.48 to $47.47, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 9

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 23,479

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F13 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.90 to $48.17, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (13).

F12 · ownership.nature: The reported securities are owned directly by Southgate Partner III ("SPIII"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPIII.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 8

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 23,569

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.89 to $47.88, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (11).

F12 · ownership.nature: The reported securities are owned directly by Southgate Partner III ("SPIII"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPIII.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 7

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 23,479

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F10 · ownership.nature: The reported securities are owned directly by Southgate Partner II ("SPII"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPII.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 6

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 23,507

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.96 to $47.95, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (9).

F10 · ownership.nature: The reported securities are owned directly by Southgate Partner II ("SPII"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPII.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 5

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 23,479

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.02 to $48.18, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (8).

F7 · ownership.nature: The reported securities are owned directly by Southgate Partner I ("SPI"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPI.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 4

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 23,569

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.02 to $47.91, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (6).

F7 · ownership.nature: The reported securities are owned directly by Southgate Partner I ("SPI"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPI.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 3

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 186,814

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.07 to $48.18, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (5).

F4 · ownership.nature: The reported securities are owned directly by Jack Biddle, Inc. ("JBI"). The Reporting Person is the president of JBI.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 2

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 187,114

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2019.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.99 to $47.98, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

F4 · ownership.nature: The reported securities are owned directly by Jack Biddle, Inc. ("JBI"). The Reporting Person is the president of JBI.

SEC source: 0001441683-19-000155 · wf-form4_157004856424882.xml · nonDerivative · entry 1

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,941

F1 · kind: These shares were granted under the Issuer's 2017 Equity Incentive Plan pursuant to the Issuer's Non-Employee Director Compensation Policy approved by the Board of Directors on May 10, 2017.

SEC source: 0001441683-19-000163 · wf-form4_157004896584816.xml · nonDerivative · entry 1

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,913

F1 · kind: These shares were granted under the Issuer's 2017 Equity Incentive Plan pursuant to the Issuer's Non-Employee Director Compensation Policy approved by the Board of Directors on May 10, 2017.

SEC source: 0001441683-19-000161 · wf-form4_157004883587363.xml · nonDerivative · entry 1

Mulligan Michael J. · CIK 0001706773 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,537

F1 · kind: These shares were granted under the Issuer's 2017 Equity Incentive Plan pursuant to the Issuer's Non-Employee Director Compensation Policy approved by the Board of Directors on May 10, 2017.

SEC source: 0001441683-19-000159 · wf-form4_157004874858879.xml · nonDerivative · entry 1

Kilberg Bobbie G · CIK 0001362638 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 368

F1 · kind: These shares were granted under the Issuer's 2017 Equity Incentive Plan pursuant to the Issuer's Non-Employee Director Compensation Policy approved by the Board of Directors on May 10, 2017.

F2 · balance_after: Excludes 485 shares previously owned directly that were contributed to William & Barbara Kilberg Trustees of the William Kilberg Trust DTD 07/01/98 and Barbara & William Kilberg Trustees of the Barbara Kilberg Trust DTD 07/01/98, Tenants in Common on 9/4/19.

SEC source: 0001441683-19-000157 · wf-form4_157004864466852.xml · nonDerivative · entry 1

Devine Michael G · CIK 0001435102 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,935

F1 · kind: These shares were granted under the Issuer's 2017 Equity Incentive Plan pursuant to the Issuer's Non-Employee Director Compensation Policy approved by the Board of Directors on May 10, 2017.

SEC source: 0001441683-19-000153 · wf-form4_156892393711831.xml · nonDerivative · entry 3

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,545

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.54 to $48.82, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (4).

SEC source: 0001441683-19-000153 · wf-form4_156892393711831.xml · nonDerivative · entry 2

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,645

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.52 to $48.46, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000153 · wf-form4_156892393711831.xml · nonDerivative · entry 1

Boccassam Prashanth · CIK 0001706771 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 116,095

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2019.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.51 to $47.45, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

SEC source: 0001441683-19-000151 · wf-form4_156831914164884.xml · nonDerivative · entry 2

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,000

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 10, 2018.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.70 to $49.24, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3).

SEC source: 0001441683-19-000151 · wf-form4_156831914164884.xml · nonDerivative · entry 1

Kramer Robert Charles · CIK 0001707249 · Director · General Manager

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,881

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 10, 2018.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.70 to $48.69, inclusive. The Reporting Person undertakes to provide to Appian Corporation, any security holder of Appian Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2).

SEC source: 0001441683-19-000148 · wf-form4_156814569579542.xml · nonDerivative · entry 4

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 24,479

F4 · ownership.nature: The reported securities are owned directly by Southgate Partner III ("SPIII"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPIII.

SEC source: 0001441683-19-000148 · wf-form4_156814569579542.xml · nonDerivative · entry 3

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 24,479

F3 · ownership.nature: The reported securities are owned directly by Southgate Partner II ("SPII"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPII.

SEC source: 0001441683-19-000148 · wf-form4_156814569579542.xml · nonDerivative · entry 2

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 24,479

F2 · ownership.nature: The reported securities are owned directly by Southgate Partner I ("SPI"), a family trust established for the benefit of the Reporting Person's child. The Reporting Person is the trustee of SPI.

SEC source: 0001441683-19-000148 · wf-form4_156814569579542.xml · nonDerivative · entry 1

Biddle Albert G.W. III · CIK 0001707248 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 191,814

F1 · ownership.nature: The reported securities are owned directly by Jack Biddle, Inc. ("JBI"). The Reporting Person is the president of JBI.

SEC source: 0001441683-19-000149 · wf-form4_156814579390433.xml · derivative · entry 3

Calkins Matthew W · CIK 0001309192 · Director · CEO and President · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 20,899,710

Underlying: Class A Common Stock · 375,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (3))

F3 · derivative.exercise_price: (continued from Footnote (2)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

F1 · kind: Pursuant to the terms of the Class B Common Stock, the Reporting Person converted shares of Class B Common Stock into shares of Class A Common Stock.

F2 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (3))

F3 · derivative.exercise_date: (continued from Footnote (2)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

F2 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (1) any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the Issuer's certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes or (continued to Footnote (3))

F3 · derivative.expiration_date: (continued from Footnote (2)) (2) the death or disability, as defined in the Issuer's certificate of incorporation, of the applicable Class B common stockholder (or nine months after the date of death or disability if the stockholder is one of the Issuer's founders). In addition, on the first trading day following the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate voting power of the Issuer's then outstanding capital stock, all outstanding shares of Class B Common Stock shall convert automatically into Class A Common Stock, and no additional shares of Class B Common Stock will be issued.

F4 · ownership.nature: The reportable securities are owned directly by Calkins Family LLC ("Family"). The Reporting Person serves as the managing manager of Family.

SEC source: 0001441683-19-000149 · wf-form4_156814579390433.xml · nonDerivative · entry 2

Calkins Matthew W · CIK 0001309192 · Director · CEO and President · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F4 · ownership.nature: The reportable securities are owned directly by Calkins Family LLC ("Family"). The Reporting Person serves as the managing manager of Family.