RBBN

EX-99.1

2 tm2628346d1_ex99-1.htm

EXHIBIT 99.1

Exhibit 99.1

Ribbon Communications Inc. Reports

Third Quarter 2026 Financial Results

Revenue increased 14% sequentially and Net Income improved by $18M;

further significant gains expected in 4Q 2026

IP Optical Networks Revenue increased 17% QoQ led by new wins in North America

Cloud and Edge Revenue increased 11% QoQ led by U.S. Tier 1 Network Modernization

Growing Pipeline of Data Center and AI-related

Opportunities

PLANO, Texas – Ribbon Communications Inc. (Nasdaq: RBBN), a global leader in real-time communications technology, IP routing, and optical networking solutions, today announced its financial results for the third quarter of 2026.

Third Quarter 2026 Highlights

Financial Results¹:

·Revenue was $219 million, compared to $215 million for the third quarter of 2025

·GAAP

Operating Income was $6 million, compared to $3 million for the third quarter of 2025

·Non-GAAP Adjusted EBITDA was $27 million, compared to $29 million for the third quarter of 2025

·GAAP

Gross Margin was 48.2%, compared to 50.1% for the third quarter of 2025

·Non-GAAP Gross Margin was 50.3%, compared to 52.6% for the third quarter of 2025

“We had meaningful sequential increases in revenue and profitability in both of our operating segments again in the third quarter, consistent with our second quarter results commentary. The strong IP Optical Networks bookings trend in the first half of the year translated into a record third quarter sales for the business, growing 5% year over year and included two new U.S. Tier 2 Internet Service Provider customers,” stated Bruce McClelland, President and Chief Executive Officer of Ribbon Communications. “We are also encouraged by increased activity in the Cloud and Edge segment with Service Provider revenue growing 15% sequentially supported by a 50% increase in sales to our largest customer, along with further growth in the Enterprise and Government market segments. This progress clearly supports the second-half improvement we expected, with positive trends in both operating segments and stronger results projected for the fourth quarter. Looking ahead to 2027, we see further growth drivers with the adoption of voice-enabled Enterprise AI applications, new solutions to mitigate AI-generated voice-phishing cyber-attacks, and broader demand for data center fiber infrastructure.”

Rick Marmurek, Chief Financial Officer of Ribbon Communications, remarked, “Our performance improved significantly in the third quarter, with revenue increasing 14% and Adjusted EBITDA more than doubling to $27 million from $12 million in the second quarter. At the same time, Non-GAAP operating expenses remained at $88 million. We continue to focus on expanding margins, maintaining strong cost discipline, and further strengthening our balance sheet.”

1

Three months ended Nine months ended

September 30, September 30,

In millions, except per share amounts 2026 2025 2026 2025

GAAP Revenue $219 $215 $574 $617

GAAP Net income (loss) $(9) $(12) $(70) $(49)

Non-GAAP Net income (loss)

$12 $7 $(1) $12

Non-GAAP Adjusted EBITDA

$27 $29 $30 $67

GAAP diluted earnings (loss) per share $(0.05) $(0.07) $(0.40) $(0.28)

Non-GAAP diluted earnings (loss) per share

$0.07 $0.04 $- $0.07

Weighted average shares outstanding basic 179 177 177 176

Weighted average shares outstanding diluted 180 181 180 181

1 Please see the reconciliations of the non-GAAP financial measures to the most directly comparable GAAP measures and additional information about non-GAAP measures in the section entitled “Discussion of Non-GAAP Financial Measures” in the attached schedules.

Business Highlights:

·HubOne Selects Ribbon's PSX to Unify Voice Traffic Across Its Applications

·Ribbon's Optical and DCI Solutions Enable PT Jala Lintas Media (JLM) to Unlock Subsea and Metro Network Capacity Between Indonesia and Singapore

·Ribbon Bolsters Its Market-Leading Critical Infrastructure Portfolio

·Ribbon and TNS Simplify Legacy Voice Switch Replacement

Business Outlook2

For the fourth quarter of 2026, the Company projects revenue of $233 million to $247 million. Non-GAAP gross margin is projected in a range of 53.5% to 54.5%. Adjusted EBITDA is projected in a range of $40 million to $47 million.

The Company’s outlook is based on current indications for its business, which are subject to change.

2 GAAP earnings guidance is not provided. Please see the reconciliations of the non-GAAP financial measures to the most directly comparable GAAP measures and additional information about the non-GAAP measures in the section entitled “Discussion of Non-GAAP Financial Measures” in the attached schedules.

Upcoming Conference Schedule

·November 10-12, 2026: Ribbon Insights, U.S.

·November 19, 2026: Needham Virtual Technology Conference

·December 1, 2026: UBS Global Technology & AI Conference

Conference Call and Webcast Information

Ribbon Communications will host a conference call to discuss the Compan

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