Results of Operations and Financial Condition. On August 6, 2026, Five9, Inc. (the “Company”) announced its financial results for the fiscal quarter ended June 30, 2026. The full text of the press release issued in connection with the announcement is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The Company is also providing additional financial information that will be posted on the Investor Relations section of its website at https://investors.five9.com/, which is attached a…

Executive Vice President of Product Engineering — Panos Kozanian: Mr. Kozanian and the Company mutually agreed to begin a transition with respect to his responsibilities.

Other Events. On May 4, 2026, Five9, Inc. (the “Company”) commenced an accelerated share repurchase agreement (“ASR”) with JPMorgan Chase Bank, National Association, to repurchase $90.0 million of the Company’s common stock under the share repurchase authorization previously disclosed on the Company’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on April 30, 2026. Under the ASR, on May 5, 2026, the Company will make a payment of $90.0 million and expects to…

Results of Operations and Financial Condition. On April 30, 2026, Five9, Inc. (the “Company”) announced its financial results for the fiscal quarter ended March 31, 2026. The full text of the press release issued in connection with the announcement is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The Company is also providing additional financial information that will be posted on the Investor Relations sections of its website at https://investors.five9.com/, which is attached…

Entry into a Material Definitive Agreement. As previously disclosed, on December 8, 2024, Five9, Inc. (the “Company”) entered into a cooperation letter agreement (the “Agreement”) with Anson Funds Management LP, Anson Advisors Inc. and certain other parties (collectively, “Anson”). The Agreement is summarized in the Current Report on Form 8-K filed by the Company on December 9, 2024, and a copy of the Agreement is filed as Exhibit 10.1 to that Current Report. On February 17, 2026, the Company…

of this Current Report on Form 8-K (including Exhibit 99.1 furnished herewith) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such a filing.

CEO — Michael Burkland: Michael Burkland is transitioning from CEO to a consulting role with Amit Mathradas appointed as the new CEO.

Chief Executive Officer and Director — Amit Mathradas: Amit Mathradas was appointed as the new Chief Executive Officer and Director, replacing Michael Burkland.

Other Events. On November 11, 2025, Five9, Inc. (the “Company”) commenced an accelerated share repurchase agreement (“ASR”) with JPMorgan Chase Bank, National Association, to repurchase $50.0 million of the Company’s common stock under the share repurchase authorization previously disclosed in the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on November 6, 2025. Under the ASR, on November 12, 2025, the Company will make a payment of $50.0 million and…

Other Events. Also on November 6, 2025, the Company announced a $150 million share repurchase authorization and the Company’s intention to enter into an accelerated share repurchase agreement with JPMorgan Chase Bank, National Association, to repurchase $50 million of the Company’s common stock.

of this Current Report on Form 8-K (including Exhibit 99.1 furnished herewith) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Director — David Welsh: David Welsh resigned from the Board of Directors.

CEO — Michael Burkland: Michael Burkland is retiring as CEO with a smooth transition plan in place.

of this Current Report on Form 8-K (including Exhibit 99.1 furnished herewith) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such a filing.

of this Current Report on Form 8-K (including Exhibit 99.1 furnished herewith) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Other Events. On April 3, 2025, the Company's Chief Executive Officer, Mike Burkland, sent an email to employees about the Plan, which is attached to this Current Report on Form 8-K as Exhibit 99.1, and is incorporated herein by reference. Forward-Looking Statements This Current Report on Form 8-K contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements regarding the Company’s updated guidance for the first qu…

Results of Operations and Financial Condition As of April 3, 2025, Five9, Inc. (the “Company”) expects its results for the quarter ended March 31, 2025 to be in-line with or better than the guidance for revenue, GAAP net loss per share and non-GAAP net income per share as provided in its press release issued February 20, 2025, that was previously furnished as Exhibit 99.1 to the Company’s Form 8-K filed with the Securities and Exchange Commission on February 20, 2025 (the “Prior Press Release…

Costs Associated with Exit or Disposal Activities. On March 31, 2025, the Board of Directors of the Company approved a reduction in force plan (the “Plan”) as part of the Company’s broader efforts to prioritize investments in key strategic areas, including artificial intelligence, as well as to drive profitable growth in supporting its positive, long-term outlook and increasing shareholder value. On April 3, 2025, the Company commenced execution of the Plan, which is expected to reduce the Co…

Director — Mr. Jack Acosta: Mr. Jack Acosta will not be nominated for re-election as a Class II director.

President — Andy Dignan: Andy Dignan was promoted to President from Chief Operating Officer.

CFO — Barry Zwarenstein: The CFO is retiring and a successor has been appointed.

of this Current Report on Form 8-K (including Exhibit 99.1 furnished herewith) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as expressly set forth by specific reference in such a filing.

The filing is about an extension of the Key Employee Severance Benefit Plan, which does not involve any actual management change.

Executive Vice President, Go-to-Market Strategy — Daniel Burkland: Mr. Daniel Burkland transitioned from his executive role to a consulting position.

Director — Mr. Gupta: Mr. Gupta was appointed as a Class III Director of the Board.