Five9 reported Q3 2026 results

Item 2.02 Results of Operations and Financial Condition.

On November 5, 2026, Five9, Inc. (the "Company") announced its financial results for the fiscal quarter ended September 30, 2026.¹ 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.² 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 as Exhibit 99.2 hereto.²

The information in Item 2.02 of this Current Report on Form 8-K (including Exhibits 99.1 and 99.2 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 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description

99.1

Press Release issued by the Company on No vember 5 , 2026.

99.2

Supplemental Metric Disclosure.

104 The 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 5, 2026

By: /s/ Bryan Lee

Bryan Lee

Chief Financial Officer

Five9 Announces Third Quarter 2026 Financial Results

Q3 Revenue Grew 13% year-over-year

Q3 Subscription Revenue Grew 16% year-over-year

Five9 Signs Definitive Agreement to Acquire Level AI

SAN RAMON, Calif. - November 5, 2026 - Five9, Inc. (NASDAQ:FIVN), the Genius CX Platform provider, today reported results for the third quarter ended September 30, 2026.

Third Quarter 2026 Financial Results

• Revenue for the third quarter of 2026 increased 13% to $323.3 million, compared to $285.8 million for the third quarter of 2025.³

• GAAP gross margin was 53.4% for the third quarter of 2026, compared to 55.0% for the third quarter of 2025.⁵

• Adjusted gross margin was 61.7% for the third quarter of 2026, compared to 62.8% for the third quarter of 2025.

• GAAP net income for the third quarter of 2026 was $14.5 million, or $0.19 per diluted share, and 4.5% of revenue, compared to GAAP net income of $18.0 million, or $0.21 per diluted share, and 6.3% of revenue, for the third quarter of 2025.⁴

• Non-GAAP net income for the third quarter of 2026 was $63.7 million, or $0.82 per diluted share, and 19.7% of revenue, compared to non-GAAP net income of $60.6 million, or $0.78 per diluted share, and 21.2% of revenue, for the third quarter of 2025.

• Adjusted EBITDA for the third quarter of 2026 was $81.2 million, or 25.1% of revenue⁵, compared to $71.7 million, or 25.1% of revenue, for the third quarter of 2025.

• GAAP operating cash flow for the third quarter of 2026 was $58.4 million, compared to GAAP operating cash flow of $59.2 million for the third quarter of 2025.⁶

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"Q3 was another solid quarter, highlighted by accelerating subscription revenue growth, with AI revenue growth stepping up significantly. These results indicate that our Humantic CX strategy is working. As AI reshapes the customer experience landscape, we believe adding Level AI strengthens our competitive position, expands the customers we can serve, and deepens the AI talent behind our continuous innovation."

- Amit Mathradas, Chief Executive Officer

Third Quarter & Recent Business Highlights

• Signed Definitive Agreement to Acquire Level AI for $325.0 million in cash

• Named a Leader in the 2026 Gartner® Magic Quadrant™ for Contact Center as a Service

• Recognized as a Leader in the 2026 IDC MarketScape: Worldwide Agentic Contact Center-as-a-Service Platforms

• Named to the 2026 Best Workplaces in Technology list by Fortune Media and Great Place To Work®

• Supplemental metric disclosure is available on the Investor Relations section of Five9'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 described 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 $1.269 to $1.275 billion.⁷

• GAAP net income per share in the range of $0.75 to $0.83, assuming diluted shares outstanding of approximately 77.1 million.

• Non-GAAP net income per share in the range of $3.17 to $3.21, assuming diluted shares outstanding of approximately 77.1 million.

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

• Revenue in the range of $328.0 to $334.0 million.⁷

• GAAP net income per share in the range of $0.28 to $0.36, assuming diluted shares outstanding of approximately 78.0 million.

• Non-GAAP net income per share in the range of $0.88 to $0.92, assuming diluted shares outstanding of approximately 78.0 million.

With respect to Five9's guidance as provided above, such guidance does not include any contribution from the pending acquisition of Level AI⁷, which is expected to close in Q4 2026, subject to customary

2 closing conditions. Please refer to the "Reconciliation of GAAP Net Income to Non-GAAP Net Income - Guidance" table for more details, including important assumptions upon which such guidance is based.

Conference Call Details

Five9 will discuss its third quarter 2026 results today, November 5, 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 prepared in accordance with U.S. generally accepted accounting principles (GAAP), this press release and the accompanying tables contain certain non-GAAP financial measures. We calculate adjusted gross profit and adjusted gross margin by adding back the following items to gross profit: stock-based compensation, depreciation, intangibles amortization, acquisition and related transaction costs and one-time integration costs, costs related to reduction in force plans, and lease amortization for finance leases. We calculate adjusted EBITDA b