Ribbon forecasts Q4 2026 revenue of $233M-$247M with adjusted EBITDA of $40M-$47M as Cloud & edge rebounds

Earnings Call Insights: Ribbon Communications (RBBN) Q3 2026

Management view

• CEO Bruce McClelland said the company delivered the “significant sequential improvement in both revenue and earnings” it had flagged, reporting “revenue increased 14% sequentially to $219 million, while adjusted EBITDA more than doubled to $27 million.”
• McClelland highlighted IP Optical execution against first-half bookings, calling it “a record third quarter of sales for the segment,” and said the quarter included “two new Tier 2 service provider customers” in the U.S.
• McClelland pointed to Verizon as a key swing factor, saying “Verizon continued as our largest 10% plus customer in the quarter with increased activity resulting in sales growth of approximately 50% compared to the first half quarterly run rate,” and framed it as “meaningful progress” on reaccelerating its modernization program.
• CFO Eric Marmurek said, “Third quarter performance improved significantly from the second quarter with strong revenue growth, higher profitability and meaningful improvement in earnings,” adding that “consolidated non-GAAP gross margin was 50.3%.”
• McClelland emphasized new growth vectors inside Cloud & Edge, including “a new partnership with TNS,” progress in enterprise AI via Salesforce, and new security capabilities: “We recently announced new capabilities… to be able to detect AI-generated voice impersonation, deep fakes and other new security threats.”

Outlook

• Management guided Q4 2026 to “revenue to be in a range of $233 million to $247 million and adjusted EBITDA to be in a range of $40 million to $47 million,” with McClelland adding, “we’re expecting sequential and year-over-year growth in the fourth quarter.”
• McClelland said Q4 growth is expected to be “led primarily from our Cloud and Edge segment,” and reiterated the cost headwind assumption: “approximately $2 million per quarter in increased product costs associated with higher component and logistics expenses,” with “potential to partially offset that through targeted price increases in 2027.”
• McClelland added a supply constraint caveat: “we do anticipate to be supply limited to some extent in the fourth quarter given the increasing demand environment for key technologies.”
• Compared with Q2 commentary, management shifted from a broad expectation of a “stronger second half” to a specific Q4 step-up framework tied to Cloud & Edge mix, professional services, and software contribution.

Financial results

• Marmurek reported Q3 2026 revenue of $219 million, “up 14% sequentially and up 2% year-over-year,” and non-GAAP diluted EPS of “$0.07.”
• Marmurek said non-GAAP operating expenses were “$88 million,” while net interest expense was “$11 million.”
• Segment results showed IP Optical Networks revenue of “$96 million,” with non-GAAP gross margin of “35.5%” and “adjusted EBITDA was a loss of $1 million.”
• Cloud & Edge revenue was “$123 million,” with non-GAAP gross margin of “61.9%” and “adjusted EBITDA… was $28 million or 23% of revenue.”
• On cash and leverage, Marmurek said operating cash flow was “a use of $14 million,” ending cash was “$42 million,” including “a $15 million draw on our revolver,” and “net debt leverage ratio was 4.4x.”

Q&A

• Michael Genovese, Rosenblatt Securities Inc.: asked for Q3 IP Optical bookings and what drives Q4 margin; President and CEO Bruce McClelland: “the bookings number in Q3 was up about 9% year-over-year… a book-to-bill of about 0.82,” and said Q4 margin lift is driven by Cloud & Edge mix including “the mix of software… and then higher professional service revenue.”
• Genovese, Rosenblatt Securities Inc.: pressed on Verizon contribution and Frontier; President and CEO McClelland: “we do anticipate a higher deployment rate or a migration rate in 2027,” while noting “the planning around the new footprint is still early.”
• Timothy Savageaux, Northland Capital Markets: asked about the “funnel/pipeline” and Tier 1 composition; President and CEO McClelland: “the biggest opportunities we’re seeing are with more traditional Tier 1 telecom operators,” and said the focus is “less into the data center directly, and it’s more with the basic customers.”
• Savageaux, Northland Capital Markets: asked about Tier 2 wins and competitive dynamics; President and CEO McClelland: “that’s exactly what we’re seeing in the market,” adding Tier 2 operators “all invest double-digit millions of dollars into their fiber infrastructure.”
• Dave Kang, B. Riley Securities: asked about Q4 IP Optical bookings and IP vs. optical mix; President and CEO McClelland: “the bookings number for Q4 looks pretty positive,” and said mix will vary because “a lot of our deployments are project-based.”
• Genovese, Rosenblatt Securities Inc.: asked about supply limits and potential revenue slippage; President and CEO McClelland: cited issues including “memory,” “core silicon,” and “optical” lead times, and said, “I do expect we’ll probably push $5 million to $10 million” into a subsequent quarter.
• Genovese, Rosenblatt Securities Inc.: asked about cash flow trajectory; CFO Marmurek: “I do expect it to improve a little bit into the fourth quarter and certainly as we move into Q1 of ’27.”

Sentiment analysis

• Analysts sentiment was slightly positive and probing, with focus on sustainability of Q4 margin/trajectory and supply constraints; Genovese framed the call as “sounding really good,” but followed with detailed questions on bookings, customer concentration, and “how much revenue could that push into ’27?”
• Management sentiment was positive and assertive in prepared remarks, with McClelland saying, “we’re encouraged,” “we believe,” and “we’re confident,” while also using cautionary language on timing variability and supply constraints.
• Versus the prior quarter, management sounded more confident on near-term execution (delivered Q3 step-up) and more specific on Q4 drivers, while analysts shifted from Q2’s emphasis on Verizon moderation and BEAD timing to Q3’s emphasis on Q4 margin mechanics and component availability.

Quarter-over-quarter comparison

• Q3 prepared remarks emphasized realized second-half inflection (“delivered on those goals”) and a Verizon activity rebound, while Q2 emphasized moderated expectations tied to “more slowly than we expected” Tier 1 migrations and a “wider range of potential outcomes.”
• Q3 introduced additional forward themes beyond Salesforce/AWS, including McClelland’s claim of “significant customer interest” in detecting “AI-generated voice impersonation,” and disclosed “a $15 million draw on our revolver to simplify cash management.”
• Q2 highlighted IP Optical bookings strength (“book-to-bill of 1.6x revenue” and backlog up “more than 60%”), while Q3 highlighted conversion to revenue and disclosed a lower Q3 IP Optical “book-to-bill of about 0.82” in Q&A, tied to the revenue step-up.

Risks and concerns

• McClelland cautioned that “the timing of individual awards and deployments can create some variability in quarterly results.”
• Management flagged component and supply constraints, with McClelland noting “memory,” “core silicon,” and optical lead times, and warning of potential shipment timing impacts of “$5 million to $10 million.”
• Management embedded margin risk in guidance assumptions, citing “approximately $2 million per quarter in increased product costs” and potential mitigation via “targeted price increases in 2027.”

Final takeaway

Management described Q3 as the start of the company’s expected second-half acceleration, pointing to sequential improvement in revenue and profitability, record IP Optical segment sales, and a rebound in Verizon activity. For Q4, management guided to $233 million-$247 million of revenue and $40 million-$47 million of adjusted EBITDA, with Cloud & Edge mix and professional services expected to drive profitability, while supply constraints and component-cost inflation remained explicit headwinds.

Read the full Earnings Call Transcript

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