FIVN

SEC source: 0001288847-25-000157 · wk-form4_1749243771.xml · nonDerivative · entry 3

Dignan Andy · CIK 0002000932 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 227,139

F4 · shares: 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, 2024.

SEC source: 0001288847-25-000154 · wk-form4_1749160751.xml · nonDerivative · entry 3

Burkland Michael · CIK 0001604097 · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 385,987

F4 · shares: The sales reported on this form represent a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F5 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001288847-25-000156 · wk-form4_1749243681.xml · nonDerivative · entry 1

Lee Bryan M · CIK 0002063775 · Interim CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 126,468

F1 · shares: The sale reported on this form represents a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

F3 · balance_after: Includes 76 shares acquired under the Five9, Inc. Employee Stock Purchase Plan on May 15, 2025.

SEC source: 0001288847-25-000159 · wk-form4_1749243875.xml · nonDerivative · entry 1

Kozanian Panos · CIK 0001940974 · EVP, Product Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,218

F1 · shares: The sale reported on this form represents a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

F3 · balance_after: Includes 675 shares acquired under the Five9, Inc. Employee Stock Purchase Plan on May 15, 2025.

SEC source: 0001288847-25-000160 · wk-form4_1749244342.xml · nonDerivative · entry 3

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,901

F4 · shares: 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, 2024.

SEC source: 0001288847-25-000160 · wk-form4_1749244342.xml · nonDerivative · entry 2

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 46,051

F4 · shares: 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, 2024.

F5 · shares: The reported sale was to cover taxes upon the vesting of restricted stock units.

SEC source: 0001288847-25-000160 · wk-form4_1749244342.xml · nonDerivative · entry 1

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 47,237

F1 · shares: The sale reported on this form represents a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

F3 · balance_after: Includes 674 shares acquired under the Five9, Inc. Employee Stock Purchase Plan on May 15, 2025.

SEC source: 0001288847-25-000157 · wk-form4_1749243771.xml · nonDerivative · entry 2

Dignan Andy · CIK 0002000932 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 227,839

F4 · shares: 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, 2024.

F5 · shares: The reported sale was to cover taxes upon the vesting of restricted stock units.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.83 to $28.31, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000157 · wk-form4_1749243771.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 230,506

F1 · shares: The sale reported on this form represents a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

F3 · balance_after: Includes 675 shares acquired under the Five9, Inc. Employee Stock Purchase Plan on May 15, 2025.

SEC source: 0001288847-25-000154 · wk-form4_1749160751.xml · nonDerivative · entry 2

Burkland Michael · CIK 0001604097 · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 391,462

F1 · shares: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 12, 2024. The reported sales were to cover taxes upon the vesting of restricted stock units.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.34 to $27.47, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000154 · wk-form4_1749160751.xml · nonDerivative · entry 1

Burkland Michael · CIK 0001604097 · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 396,668

F1 · shares: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 12, 2024. The reported sales were to cover taxes upon the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.32 to $27.32, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000141 · wk-form4_1747958893.xml · nonDerivative · entry 1

MARINER JONATHAN D · CIK 0001063663 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,175

SEC source: 0001288847-25-000139 · wk-form4_1747951939.xml · nonDerivative · entry 1

Iskow Julie · CIK 0001776078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,145

SEC source: 0001288847-25-000137 · wk-form4_1747950050.xml · nonDerivative · entry 1

Barsamian Sue · CIK 0001742302 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,935

SEC source: 0001288847-25-000129 · wk-form4_1747949127.xml · nonDerivative · entry 1

ZOLLARS ROBERT · CIK 0001231089 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,371

SEC source: 0001288847-25-000131 · wk-form4_1747949243.xml · nonDerivative · entry 1

Welsh David S. · CIK 0001603743 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,795

SEC source: 0001288847-25-000135 · wk-form4_1747949962.xml · nonDerivative · entry 1

Burdiek Michael J · CIK 0001324293 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,860

SEC source: 0001288847-25-000121 · wk-form4_1746477105.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 232,009

F1 · shares: 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, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.10 to $26.01, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000105 · wk-form4_1744921688.xml · nonDerivative · entry 1

Lee Bryan M · CIK 0002063775 · Interim CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,393

SEC source: 0001288847-25-000109 · wk-form4a_1745887725.xml · nonDerivative · entry 1

Lee Bryan M · CIK 0002063775 · Interim CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 128,190

F1 · balance_after: Due to administrative error, the Form 4 filed on April 17, 2025 did not include unvested restricted stock units beneficially owned by the Reporting Person.

SEC source: 0001288847-25-000085 · wk-form4_1743714909.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 232,709

F1 · shares: 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, 2024.

SEC source: 0001288847-25-000069 · primary_doc.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 233,409

SEC source: 0001288847-25-000068 · primary_doc.xml · nonDerivative · entry 1

Five9, Inc. · CIK 0001288847 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 233,409

SEC source: 0001288847-25-000056 · wk-form4_1741897380.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 193,501

F1 · shares: 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, 2024.

SEC source: 0001288847-25-000058 · wk-form4_1741897496.xml · nonDerivative · entry 1

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 47,165

F1 · shares: 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, 2024.

SEC source: 0001288847-25-000037 · wk-form4_1741134901.xml · nonDerivative · entry 2

Kozanian Panos · CIK 0001940974 · EVP, Product Engineering

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 126,359

F1 · shares: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on Mach 13, 2024.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.30 to $34.10, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000037 · wk-form4_1741134901.xml · nonDerivative · entry 1

Kozanian Panos · CIK 0001940974 · EVP, Product Engineering

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 131,124

F1 · shares: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on Mach 13, 2024.

F2 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.64 to $33.30, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000050 · wk-form4_1741307721.xml · nonDerivative · entry 1

ZWARENSTEIN BARRY · CIK 0001227348 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,583

F1 · shares: The sale reported on this form represents a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001288847-25-000048 · wk-form4_1741307628.xml · nonDerivative · entry 1

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,300

F1 · shares: The sale reported on this form represents a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

F3 · balance_after: Due to administrative error, the Form 4 filed on March 8, 2022 under reported the sale to cover transaction that occurred on March 4, 2022, by 254 shares. These shares were sold in multiple transactions at prices ranging from $98.25 to $98.75, inclusive.

SEC source: 0001288847-25-000046 · wk-form4_1741307504.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 194,201

F1 · shares: The sale reported on this form represents a Five9, Inc. mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units, and it does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker for sales to cover taxes upon vesting of restricted stock units for all employees of Five9, Inc., including the Reporting Person, on the date such sales occurred. The Reporting Person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001288847-25-000044 · wk-form4_1741223090.xml · nonDerivative · entry 2

Burkland Michael · CIK 0001604097 · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 404,056

F1 · shares: All sales occurred via a 10b5-1 trading plan with a portion used to cover taxes upon vesting of restricted stock units.

F2 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.79 to $36.60, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000044 · wk-form4_1741223090.xml · nonDerivative · entry 1

Burkland Michael · CIK 0001604097 · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 408,747

F1 · shares: All sales occurred via a 10b5-1 trading plan with a portion used to cover taxes upon vesting of restricted stock units.

F2 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.75 to $35.75, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-25-000035 · wk-form4_1740693094.xml · nonDerivative · entry 1

Kozanian Panos · CIK 0001940974 · EVP, Product Engineering

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,978

SEC source: 0001288847-25-000034 · wk-form4_1740692927.xml · nonDerivative · entry 1

Burkland Michael · CIK 0001604097 · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 416,651

SEC source: 0001288847-25-000033 · wk-form4_1740692768.xml · nonDerivative · entry 1

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,071

SEC source: 0001288847-25-000032 · wk-form4_1740692502.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 197,041

F1 · balance_after: Due to administrative error, the Form 4 filed on December 6, 2024 incorrectly reported the sale of 11 more shares than were actually sold in the sale to cover transaction that occurred on December 4, 2024.

SEC source: 0001415889-24-028905 · form4-12112024_021240.xml · nonDerivative · entry 2

Gupta Sagar · CIK 0001916410 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,377

F2 · shares: Because Mr. Gupta serves on the Board as a representative of the Anson Funds, Mr. Gupta does not have a right to any economic interest in securities of the Issuer granted to him by the Issuer in respect of his Board position. The Anson Funds are entitled to receive all of the economic interest in securities granted to Mr. Gupta by the Issuer in respect of Mr. Gupta's Board position. Mr. Gupta disclaims beneficial ownership of the Issuer's securities to which this report relates and at no time has Mr. Gupta had any economic interest in such securities except any indirect economic interest through Anson Funds, entities in which he does not have a controlling interest and over which he does not have investment control.

F4 · shares: These securities are RSUs. Each RSU represents a contingent right to receive one share of Common Stock. The RSUs will vest in full on December 8, 2025, subject to the Reporting Person continuing as a service provider through the vesting date.

F3 · ownership.direct: As discussed in footnotes 1 and 2, represents securities in which the Anson Funds have all of the economic interest.

SEC source: 0001415889-24-028905 · form4-12112024_021240.xml · nonDerivative · entry 1

Gupta Sagar · CIK 0001916410 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,416

F1 · shares: On December 8, 2024, Five9, Inc. (the "Issuer") granted a total of 11,377 restricted stock units ("RSUs") of the Issuer to Sagar Gupta, a member of the Issuer's board of directors (the "Board") in respect of his service on the Board. Mr. Gupta holds these RSUs for the benefit of certain investment funds (the "Anson Funds") for which Anson Advisors Inc. and Anson Funds Management LP serve as co-investment advisors. Each RSU represents a contingent right to receive one share of Common Stock. With respect to 9,416 of the RSUs, one-third of such RSUs will vest on December 8, 2025 and each one-year anniversary thereafter, subject to the Reporting Person continuing as a service provider through the applicable vesting date.

F2 · shares: Because Mr. Gupta serves on the Board as a representative of the Anson Funds, Mr. Gupta does not have a right to any economic interest in securities of the Issuer granted to him by the Issuer in respect of his Board position. The Anson Funds are entitled to receive all of the economic interest in securities granted to Mr. Gupta by the Issuer in respect of Mr. Gupta's Board position. Mr. Gupta disclaims beneficial ownership of the Issuer's securities to which this report relates and at no time has Mr. Gupta had any economic interest in such securities except any indirect economic interest through Anson Funds, entities in which he does not have a controlling interest and over which he does not have investment control.

F3 · ownership.direct: As discussed in footnotes 1 and 2, represents securities in which the Anson Funds have all of the economic interest.

SEC source: 0001288847-24-000167 · wk-form4_1733523582.xml · nonDerivative · entry 1

ZWARENSTEIN BARRY · CIK 0001227348 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,396

F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units. The sales reported in this Form 4 were effected in accordance with Five9, Inc.s previously established sell to cover withholding policy, the Corporations Policy.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker under the Corporations Policy for sales to cover taxes upon vesting of restricted stock units for all individuals, including the reporting person subject to the Corporations Policy on the date such sales occurred. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001288847-24-000166 · wk-form4_1733523483.xml · nonDerivative · entry 2

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 35,526

F3 · 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 13, 2023 .

F4 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.09 to $41.47, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-24-000166 · wk-form4_1733523483.xml · nonDerivative · entry 1

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 36,600

F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units. The sales reported in this Form 4 were effected in accordance with Five9, Inc.s previously established sell to cover withholding policy, the Corporations Policy.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker under the Corporations Policy for sales to cover taxes upon vesting of restricted stock units for all individuals, including the reporting person subject to the Corporations Policy on the date such sales occurred. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001288847-24-000165 · wk-form4_1733523404.xml · nonDerivative · entry 3

Kozanian Panos · CIK 0001940974 · EVP, Product Engineering

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,009

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 March 13, 2024.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.22 to $42.81, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-24-000165 · wk-form4_1733523404.xml · nonDerivative · entry 2

Kozanian Panos · CIK 0001940974 · EVP, Product Engineering

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 72,818

F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

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 March 13, 2024.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.11 to $42.22, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-24-000165 · wk-form4_1733523404.xml · nonDerivative · entry 1

Kozanian Panos · CIK 0001940974 · EVP, Product Engineering

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 73,628

F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

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 March 13, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.10 to $42.08, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-24-000164 · wk-form4_1733523317.xml · nonDerivative · entry 1

Dignan Andy · CIK 0002000932 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 115,818

F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units. The sales reported in this Form 4 were effected in accordance with Five9, Inc.s previously established sell to cover withholding policy, the Corporations Policy.

F2 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker under the Corporations Policy for sales to cover taxes upon vesting of restricted stock units for all individuals, including the reporting person subject to the Corporations Policy on the date such sales occurred. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001288847-24-000163 · wk-form4_1733445245.xml · nonDerivative · entry 1

Burkland Michael · CIK 0001604097 · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 240,894

F1 · shares: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 12, 2024.

F2 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

SEC source: 0001288847-24-000139 · wk-form4_1726177834.xml · nonDerivative · entry 2

ZWARENSTEIN BARRY · CIK 0001227348 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 101,732

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 March 4, 2024.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.27 to $27.65 inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-24-000139 · wk-form4_1726177834.xml · nonDerivative · entry 1

ZWARENSTEIN BARRY · CIK 0001227348 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 102,258

F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

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 March 4, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.64 to $27.27, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.

SEC source: 0001288847-24-000138 · wk-form4_1725660372.xml · nonDerivative · entry 2

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 36,872

F4 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units. The sales reported in this Form 4 were effected in accordance with Five9, Inc.s previously established sell to cover withholding policy, the Corporations Policy.

F5 · price: The price reported in Column 4 is a weighted average price applied to the transaction by the broker under the Corporations Policy for sales to cover taxes upon vesting of restricted stock units for all individuals, including the reporting person subject to the Corporations Policy on the date such sales occurred. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001288847-24-000138 · wk-form4_1725660372.xml · nonDerivative · entry 1

Mansharamani Leena · CIK 0001846877 · SVP, Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 37,154

F1 · shares: The reported sales were to cover taxes upon the vesting of restricted stock units.

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 13, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.22 to $30.69, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., 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 ranges set forth in this footnote.