FIVN

EX-99.1

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EX-99.1

Document

Exhibit 99.1

Five9 Announces First Quarter 2026 Financial Results

Q1 Revenue grew 9% year-over-year

Q1 Subscription Revenue grew 13% year-over-year

Announces $90 million accelerated share repurchase to complete $150 million program

Announces authorization for a new $200 million share repurchase program

SAN RAMON, Calif. - April 30, 2026 - Five9, Inc. (NASDAQ:FIVN), the Intelligent CX Platform provider, today reported results for the first quarter ended March 31, 2026.

First Quarter 2026 Financial Results

•Revenue for the first quarter of 2026 increased 9% to $305.3 million, compared to $279.7 million for the first quarter of 2025.

•GAAP gross margin was 55.9% for the first quarter of 2026, compared to 55.0% for the first quarter of 2025.

•Adjusted gross margin was 63.6% for the first quarter of 2026, compared to 62.4% for the first quarter of 2025.

•GAAP net income for the first quarter of 2026 was $18.4 million, or $0.21 per diluted share, and 6.0% of revenue, compared to GAAP net income of $0.6 million, or $0.01 per diluted share, and 0.2% of revenue, for the first quarter of 2025.

•Non-GAAP net income for the first quarter of 2026 was $58.6 million, or $0.76 per diluted share, and 19.2% of revenue, compared to non-GAAP net income of $47.3 million, or $0.62 per diluted share, and 16.9% of revenue, for the first quarter of 2025.

•Adjusted EBITDA for the first quarter of 2026 was $74.5 million, or 24.4% of revenue, compared to $52.7 million, or 18.8% of revenue, for the first quarter of 2025.

•GAAP operating cash flow for the first quarter of 2026 was $63.9 million, compared to GAAP operating cash flow of $48.4 million for the first quarter of 2025.

“This quarter marks a second quarter of accelerating subscription revenue growth and an important first step in translating our strategy into strong, quantifiable results. With a renewed focus on a performance-driven culture, we are taking decisive action to sharpen our execution and optimize our

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organizational design. We are committed to building on this momentum and demonstrating our progress as we position Five9 to win for the next decade.”

- Amit Mathradas, Chief Executive Officer

Five9 also announced today its intent to enter into an accelerated share repurchase of $90 million to close out the remaining balance of the $150 million share repurchase program announced on November 6, 2025, and that its Board of Directors authorized a new share repurchase program for up to $200 million of common stock.

First Quarter & Recent Business Highlights

•LTM subscription and telecom dollar-based retention rate was 105% as of March 31, 2026

•LTM subscription dollar-based retention rate was 107% as of March 31, 2026

•Appointed Jay Lee as Chief Marketing and Growth Officer

•Launched Joint Enterprise Customer Experience AI Solution with Google Cloud

•Supplemental metric disclosure is available on the Investor Relations section of the Company's website at https://investors.five9.com/

Business Outlook

Five9 provides guidance based on current market conditions and expectations. Five9 emphasizes that the guidance is subject to various important cautionary factors referenced in the section entitled "Forward-Looking Statements" below, including risks and uncertainties associated with the ongoing impact of macroeconomic challenges.

•For the full year 2026, Five9 expects to report:

•Revenue in the range of $1.254 to $1.266 billion.

•GAAP net income per share in the range of $0.73 to $0.85, assuming diluted shares outstanding of approximately 85.4 million.

•Non-GAAP net income per share in the range of $3.22 to $3.30, assuming diluted shares outstanding of approximately 76.0 million.

•For the second quarter of 2026, Five9 expects to report:

•Revenue in the range of $303.0 to $309.0 million.

•GAAP net loss per share in the range of $(0.09) to $0.00, assuming basic shares outstanding of approximately 75.3 million.

•Non-GAAP net income per share in the range of $0.65 to $0.69, assuming diluted shares outstanding of approximately 75.4 million.

With respect to Five9’s guidance as provided above, please refer to the “Reconciliation of GAAP Net Income (Loss) to Non-GAAP Net Income - Guidance” table for more details, including important assumptions upon which such guidance is based.

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Conference Call Details

Five9 will discuss its first quarter 2026 results today, April 30, 2026, via an audio-only Zoom webinar at 4:30 p.m. Eastern Time. To access the webinar, please register by clicking here. A copy of this press release will be furnished to the Securities and Exchange Commission on a Current Report on Form 8-K and will be posted to our website, prior to the conference call.

A live webcast and a replay will be available on the Investor Relations section of the Company’s web-site at https://investors.five9.com/.

Non-GAAP Financial Measures

In addition to disclosing financial measures pre

fivn-202602190001288847false00012888472026-02-192026-02-19

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

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

FIVE9, INC.

(Exact name of Registrant as specified in its charter)

Delaware001-3638394-3394123 (State or other jurisdiction of incorporation) (Commission File No.)(I.R.S. Employer Identification No.)

3001 Bishop Drive, Suite 350 San Ramon, CA 94583 (Address of Principal Executive Offices) (Zip Code) Registrant’s telephone number, including area code: (925) 201-2000 Not Applicable (Former name or former address if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of Each ClassTrading Symbol(s)Name of Each Exchange on Which Registered Common stock, par value $0.001 per shareFIVNThe NASDAQ Global Market

Indicated by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging Growth Company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   ☐

Item 2.02 Results of Operations and Financial Condition. On February 19, 2026, Five9, Inc. (the “Company”) announced its financial results for the fiscal quarter and year ended December 31, 2025. 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 information in Item 2.02 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. Item 8.01 Other Events. The Company’s Board of Directors has determined that the Company’s 2026 Annual Meeting of Stockholders (the “Annual Meeting”) will be held on May 20, 2026 virtually via the Internet beginning at 8:30 a.m. Pacific Daylight Time. Stockholders of record at the close of business on the record date, March 24, 2026, may vote at the Annual Meeting, including any adjournment or postponement thereof. Item 9.01 Financial Statements and Exhibits. (d) Exhibits

Exhibit No.  Description

99.1 Press Release issued by the Company on February 19, 2026.

104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

SIGNATURES

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

FIVE9, INC.

Date: February 19, 2026 By: /s/ Bryan Lee Bryan Lee Chief Financial Officer

fivn-202511060001288847false00012888472025-11-062025-11-06

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

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

FIVE9, INC.

(Exact name of Registrant as specified in its charter)

Delaware001-3638394-3394123 (State or other jurisdiction of incorporation) (Commission File No.)(I.R.S. Employer Identification No.)

3001 Bishop Drive, Suite 350 San Ramon, CA 94583 (Address of Principal Executive Offices) (Zip Code) Registrant’s telephone number, including area code: (925) 201-2000 Not Applicable (Former name or former address if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act: Title of Each ClassTrading Symbol(s)Name of Each Exchange on Which Registered Common stock, par value $0.001 per shareFIVNThe NASDAQ Global Market

Indicated by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging Growth Company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   ☐

Item 2.02 Results of Operations and Financial Condition. On November 6, 2025, Five9, Inc. (the “Company”) announced its financial results for the fiscal quarter ended September 30, 2025. 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 information in Item 2.02 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. Item 8.01 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. Item 9.01 Financial Statements and Exhibits. (d) Exhibits

Exhibit No.  Description

99.1 Press Release issued by the Company on November 6, 2025.

104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

SIGNATURES

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

FIVE9, INC.

Date: November 6, 2025 By: /s/ Bryan Lee Bryan Lee Chief Financial Officer