Ribbon Communications Inc. Reports First Quarter 2025 Financial Results

Projecting Strong 1H25 with 5-8% YoY Revenue Growth

Backlog Increased 35% on Growing Service Provider Demand

Federal and Enterprise Deal Timing Affected 1Q25 Results but Delivering in 2Q

PLANO, Texas, April 29, 2025 /PRNewswire/ -- Ribbon Communications Inc. (Nasdaq: RBBN), a leading supplier of real-time communications technology and IP optical networking solutions, today announced its financial results for the first quarter of 2025. Ribbon Communications is dedicated to assisting the world's largest service providers, enterprises, and critical infrastructure operators in modernizing and safeguarding their networks and services.

First Quarter 2025 Highlights

Financial Highlights¹:

    --  Revenue was $181 million, compared to $180 million for the first quarter
        of 2024
    --  GAAP Gross Margin was 45.4%, compared to 51.2% for the first quarter of
        2024
    --  Non-GAAP Gross Margin was 48.6%, compared to 55.1% for the first quarter
        of 2024
    --  GAAP Operating Loss was ($20) million, compared to ($13) million for the
        first quarter of 2024
    --  Non-GAAP Adjusted EBITDA was $6 million, compared to $12 million for the
        first quarter of 2024

"We continue to expect a strong first half for 2025 with sales projected to increase 5-8% year over year, overcoming the reduction in Eastern Europe revenue that began in the second quarter of 2024. In the first quarter, sales to Service Providers increased more than 10% year over year driven by a broad-based focus on Network Modernization," stated Bruce McClelland, President and Chief Executive Officer of Ribbon Communications. "Sales in the quarter were lower than expected due to timing of two key Federal and Enterprise deals which we are already fulfilling and are included in our second quarter. Bookings were once again very solid, and backlog is up 35% from the same point last year giving us improved visibility and confidence in the year."

John Townsend, Chief Financial Officer, added, "We expect gross margins to return to normal levels as product and regional mix improve in the second quarter and the rest of the year. I am particularly pleased with the disciplined approach to cost and cash management that we demonstrated in the first quarter."




                                                                                                              Three months ended



                                                                                                    March 31,


                                             In millions, except per share amounts    2025     2024



     GAAP Revenue                                                                    $181     $180



     GAAP Net income (loss)                                                         $(26)   $(30)



     Non-GAAP Net income (loss)                                                      $(5)    $(1)



     Non-GAAP Adjusted EBITDA                                                          $6      $12



     GAAP diluted earnings (loss) per share                                       $(0.15) $(0.18)



     Non-GAAP diluted earnings (loss) per share                                   $(0.03) $(0.01)



     Weighted average shares outstanding basic                                        176      172



     Weighted average shares outstanding diluted                                      180      175




     
     1 Please see the reconciliations of 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:

    --  Ribbon Delivers Open, Programmable Network Upgrade to EENet of HTM
        --  Estonian Education and Research Network of the Ministry of Education
            and Research
    --  Ribbon Expands Portfolio of Innovative, Cost-Efficient, High-Density
        Routers
    --  Converge Leverages Ribbon's AI-Enabled Data Transmission Technology,
        supports Starlink Low Latency Satellite Solutions
    --  Ribbon Showcases AI-Enabled Optical Innovation at OFC
        --  NPT 2714 Router and Apollo ADM 400/800 Optical Transport recognized
            by Lightwave
    --  Moratelindo Selects Ribbon for 20T capacity, Automated Management for
        Jakarta-Singapore Link

Business Outlook(2 )
For the second quarter of 2025, the Company projects revenue of $210 million to $220 million. Non-GAAP gross margin is projected in a range of 53% to 53.5%. Adjusted EBITDA is projected in a range of $28 million to $32 million.

Full Year 2025 projections remain unchanged. 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 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

    --  May 13, 2025: 20(th) Annual Needham Technology, Media, & Consumer 1x1
        Conference
    --  May 21-22, 2025: B. Riley Securities 25(th) Annual Institutional
        Investor Conference

Conference Call and Webcast Information

Ribbon Communications will host a conference call to discuss the Company's financial results at 4:30 p.m. ET on Tuesday, April 29, 2025.

Dial-in Information:

US/Canada: 877-407-2991
International: 201-389-0925
Instant Telephone Access: Call me(TM)

A live (listen-only) webcast and replay will be available on the Company's Investor Relations website at investors.ribboncommunications.com.

Investor Contact
+1 (978) 614-8050
ir@rbbn.com

Media Contact
Catherine Berthier
+1 (646) 741-1974
cberthier@rbbn.com

About Ribbon
Ribbon Communications (Nasdaq: RBBN) delivers communications software, IP and optical networking solutions to service providers, enterprises and critical infrastructure sectors globally. We engage deeply with our customers, helping them modernize their networks for improved competitive positioning and business outcomes in today's smart, always-on and data-hungry world. Our innovative, end-to-end solutions portfolio delivers unparalleled scale, performance, and agility, including core to edge software-centric solutions, cloud-native offers, leading-edge security and analytics tools, along with IP and optical networking solutions for 5G and broadband internet. We maintain a keen focus on our commitments to Environmental, Social and Governance (ESG) matters, offering an annual Sustainability Report to our stakeholders. To learn more about Ribbon visit rbbn.com.

Important Information Regarding Forward-Looking Statements
This release contains "forward-looking statements" within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, which are subject to a number of risks and uncertainties. All statements other than statements of historical facts contained in this release, including without limitation, statements regarding the Company's projected financial results for the second quarter of 2025 and beyond; beliefs about the Company's business strategy and market share growth, are forward-looking statements. Without limiting the foregoing, the words "anticipates", "believes", "could", "estimates", "expects", "expectations", "intends", "may", "plans", "projects" and other similar language, whether in the negative or affirmative, are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.

Forward-looking statements are based on the Company's current expectations and assumptions regarding its business, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are unknown and/or difficult to predict and that may cause the Company's actual results, performance or achievements to be materially different from those expressed or implied by the forward-looking statements. Such risks and uncertainties include, but are not limited to, unpredictable fluctuations in quarterly revenue and operating results; the impact of restructuring and cost-containment activities; increases in tariffs, trade restrictions or taxes on the Company's products; supply chain disruptions resulting from component availability and/or geopolitical instabilities and disputes (including those related to the wars in Israel and Ukraine); the impact of military call-ups of employees in Israel; material litigation; the impact of fluctuations in interest rates; material cybersecurity and data intrusion incidents, including any security breaches resulting in the theft, transfer, or unauthorized disclosure of customer, employee, or Company information; the Company's ability to comply with applicable domestic and foreign information security and privacy laws, regulations and technology platform rules or other obligations related to data privacy and security; failure to compete successfully against telecommunications equipment and networking companies; failure to grow the Company's customer base or generate recurring business from existing customers; credit risks; the timing of customer purchasing decisions and the Company's recognition of revenues; macroeconomic conditions, including inflation; the Company's ability to adapt to rapid technological and market changes; the Company's ability to generate positive returns on its research and development; the Company's ability to protect its intellectual property rights and obtain necessary licenses; the Company's ability to maintain partner, reseller, distribution and vendor support and supply relationships; the potential for defects in the Company's products; risks related to the terms of the Company's credit agreement; higher risks in international operations and markets; currency fluctuations; unanticipated adverse changes in legal, regulatory or tax laws; future accounting pronouncements or changes in the Company's accounting policies and/or failure or circumvention of the Company's controls and procedures. We therefore caution you against relying on any of these forward-looking statements.

These factors are not intended to be an all-encompassing list of risks and uncertainties that may affect the Company's business and results from operations. Additional information regarding these and other factors can be found in the Company's reports filed with the Securities and Exchange Commission, including, without limitation, its Form 10-K for the year ended December 31, 2024. Any forward-looking statement made by the Company in this release speaks only as of the date on which this release was first issued. The Company undertakes no obligation to update any forward-looking statement publicly or otherwise, whether as a result of new information, future developments or otherwise, except as required by law.

Discussion of Non-GAAP Financial Measures
The Company's management uses several different financial measures, both GAAP and non-GAAP, in analyzing and assessing the overall performance of its business, making operating decisions, planning and forecasting future periods, and determining payments under compensation programs. The Company considers the use of non-GAAP financial measures helpful in assessing the core performance of its continuing operations and when planning and forecasting future periods. The Company's annual financial plan is prepared on a non-GAAP basis and is approved by its board of directors. In addition, budgeting and forecasting for revenue and expenses are conducted on a non-GAAP basis, and actual results on a non-GAAP basis are assessed against the annual financial plan. The Company defines continuing operations as the ongoing results of its business adjusted for certain expenses and credits, as described below. The Company believes that providing non-GAAP information to investors allows them to view the Company's financial results in the way its management views them and helps investors to better understand the Company's core financial and operating performance and evaluate the efficacy of the methodology and information used by its management to evaluate and measure such performance.

While the Company's management uses non-GAAP financial measures as tools to enhance its understanding of certain aspects of the Company's financial performance, management does not consider these measures to be a substitute for, or superior to, GAAP measures. In addition, the Company's presentations of these measures may not be comparable to similarly titled measures used by other companies. These non-GAAP financial measures should not be considered alternatives for, or in isolation from, the financial information prepared and presented in accordance with GAAP. Investors are cautioned that there are material limitations associated with the use of non-GAAP financial measures. In particular, many of the adjustments to the Company's financial measures reflect the exclusion of items that are recurring and will be reflected in its financial results for the foreseeable future.

Stock-Based Compensation
The expense related to stock-based awards is generally not controllable in the short-term and can vary significantly based on the timing, size and nature of awards granted. The Company believes that presenting non-GAAP operating results that exclude stock-based compensation provides investors with visibility and insight into its management's method of analysis and its core operating performance.

Amortization of Acquired Technology (including software licenses); Amortization of Acquired Intangible Assets
Amortization amounts are inconsistent in frequency and amount and are significantly impacted by the timing and size of acquisitions. Amortization of acquired technology is reported separately within Cost of revenue and Amortization of acquired intangible assets is reported separately within Operating expenses. These items are reported collectively as Amortization of acquired intangible assets in the accompanying reconciliations of non-GAAP and GAAP financial measures. The Company believes that excluding non-cash amortization of these intangible assets facilitates the comparison of its financial results to its historical operating results and to other companies in its industry as if the acquired intangible assets had been developed internally rather than acquired.

Litigation Costs
In connection with certain ongoing litigation where Ribbon is the defendant (as described in the Company's Commitments and Contingencies footnotes in its Form 10-Qs and Form 10-Ks filed with the SEC, the Company has incurred litigation costs beginning in 2023. These costs are included as a component of general and administrative expense. The Company believes that such costs are not part of its core business or ongoing operations, are unplanned, and generally are not within its control. Accordingly, the Company believes that excluding litigation costs related to these specific legal matters facilitates the comparison of the Company's financial results to its historical operating results and to other companies in its industry.

Restructuring and Related
The Company has recorded restructuring and related expense to streamline operations and reduce operating costs by closing and consolidating certain facilities and reducing its worldwide workforce. The Company believes that excluding restructuring and related expense facilitates the comparison of its financial results to its historical operating results and to other companies in its industry, as there are no future revenue streams or other benefits associated with these costs.

Preferred Stock and Warrant Liability Mark-to-Market Adjustment
The Company recorded adjustments to the fair value of its Series A Preferred Stock and Warrants to purchase shares of the Company's common stock in Other (expense) income, net. Both of these instruments were issued in March 2023 in connection with the Company's private placement and have been classified as liabilities and marked to market each reporting period until the Series A Preferred Stock was fully redeemed on June 25, 2024. The Warrant liability remains outstanding and will continue to be marked to market each reporting period. The Company excluded these gains and losses from the change in the fair value of these liabilities because it believes that such gains or losses were not part of its core business or ongoing operations.

Tax Indemnification Write-Off
In connection with the Company's acquisition of ECI Telecom Group Ltd. in 2020, a portion of the shares of our common stock that were issued as consideration were held in escrow for potential future tax liabilities. This $6 million tax indemnity asset, consisting of 2 million shares of common stock held in escrow, was written off upon its expiration on December 31, 2024. The Company believes that excluding this tax indemnification write-off facilitates the comparison of the Company's financial results to its historical operating results and to other companies in its industry.

Tax Effect of Non-GAAP Adjustments
The Non-GAAP income tax provision is presented based on an estimated tax rate applied against forecasted annual non-GAAP income. The Non-GAAP income tax provision assumes no available net operating losses or valuation allowances for the U.S. because of reporting significant cumulative non-GAAP income over the past several years. The Company is reporting its non-GAAP quarterly income taxes by computing an annual rate for the Company and applying that single rate (rather than multiple rates by jurisdiction) to its consolidated quarterly results. The Company expects that this methodology will provide a consistent rate throughout the year and allow investors to better understand the impact of income taxes on its results. Due to the methodology applied to its estimated annual tax rate, the Company's estimated tax rate on non-GAAP income will differ from its GAAP tax rate and from its actual tax liabilities.

Adjusted EBITDA
The Company uses Adjusted EBITDA as a supplemental measure to review and assess its performance. The Company calculates Adjusted EBITDA by excluding from income (loss) from operations: depreciation; stock-based compensation; amortization of acquired intangible assets; certain litigation costs; and restructuring and related expense. In general, the Company excludes the expenses that it considers to be non-cash and/or not a part of its ongoing operations. The Company may exclude other items in the future that have those characteristics. Adjusted EBITDA is a non-GAAP financial measure that is used by the investing community for comparative and valuation purposes. The Company discloses this metric to support and facilitate dialogue with research analysts and investors. Other companies may calculate Adjusted EBITDA differently than the Company does, limiting its usefulness as a comparative measure.



     RIBBON COMMUNICATIONS INC.



     Consolidated Statements of Operations



     (in thousands, except percentages and per share amounts)



     (unaudited)






                                                                                                                            
           Three months ended


                                                                                                                  March 31,               December 31,          March 31,


                                                                                                                       2025                        2024                2024



     Revenue:


                                                                         
        Product                             $81,991                    $148,335             $87,610


                                                                         
        Service                              99,288                     103,024              92,054


                                                                         
        Total revenue                       181,279                     251,359             179,664





     Cost of revenue:


                                                                         
        Product                              57,893                      68,483              45,794


                                                                         
        Service                              35,628                      37,316              35,364


                                                                              Amortization of acquired technology             5,388                       5,487               6,551


                                                                         
        Total cost of revenue                98,909                     111,286              87,709





     Gross profit                                                            82,370                                 140,073                      91,955





     Gross margin                                                            45.4 %                                 55.7 %                     51.2 %





     Operating expenses:


                                                                         
        Research and development               43,568                      45,044              45,763


                                                                         
        Sales and marketing                  31,788                      37,070              34,716


                                                                              General and administrative               15,128                      17,060              15,191


                                                                              Amortization of acquired intangible
                                                                               assets                               6,155                       6,298               6,706


                                                                         
        Restructuring and related                5,341                       1,381               3,065


                                                                              Total operating expenses              101,980                     106,853             105,441





     Income (loss) from operations                                         (19,610)                                 33,220                    (13,486)



     Interest expense, net                                                 (10,500)                               (12,003)                    (5,987)



     Other (expense) income, net                                              3,129                                (13,159)                    (7,513)





     Income (loss) before income taxes                                     (26,981)                                  8,058                    (26,986)



     Income tax benefit (provision)                                             754                                 (1,694)                    (3,375)





     Net income (loss)                                                    $(26,227)                                 $6,364                   $(30,361)





     Earnings (loss) per share:


                                                                         
        Basic                                 $(0.15)                      $0.04             $(0.18)


                                                                         
        Diluted                             $(0.15)                      $0.04             $(0.18)





     Weighted average shares used to compute earnings (loss) per share:


                                                                         
        Basic                                 175,719                     175,321             172,428


                                                                         
        Diluted                             175,719                     178,703             172,428



     RIBBON COMMUNICATIONS INC.



     Consolidated Balance Sheets



     (in thousands)



     (unaudited)






                                                                                                         March 31,   December 31,


                                                                                                              2025            2024



     
                Assets



     Current assets:


                                                                Cash and cash equivalents                $71,243         $87,770


                                                        
           Restricted cash                            2,571           2,709


                                                                Accounts receivable, net                 225,485         254,718


                                                        
           Inventory                                 79,631          79,179


                                                        
           Other current assets                      46,133          39,286


                                                        
           Total current assets                     425,063         463,662





     Property and equipment, net                        64,744                                              60,364



     Intangible assets, net                            175,994                                             187,537



     Goodwill                                                                                          300,892         300,892



     Deferred income taxes                              93,672                                              88,982



     Operating lease right-of-use assets                48,748                                              34,544



     Other assets                                       28,364                                              26,573


                                                                                                        $1,137,477      $1,162,554





     
                Liabilities and Stockholders' Equity



     Current liabilities:


                                                                Current portion of term debt              $7,438          $6,125


                                                        
           Accounts payable                          80,843          87,759


                                                                Accrued expenses and other                89,935         106,251


                                                                Operating lease liabilities               10,341           9,443


                                                        
           Deferred revenue                         116,623         119,295


                                                                Total current liabilities                305,180         328,873





     Long-term debt, net of current                    329,176                                             330,726



     Warrant liability                                   6,179                                               8,064



     Operating lease liabilities, net of current        61,144                                              37,376



     Deferred revenue, net of current                   23,515                                              20,991



     Deferred income taxes                               5,941                                               5,941



     Other long-term liabilities                        24,527                                              25,962


                                                                          Total liabilities                755,662         757,933





     Commitments and contingencies





     Stockholders' equity:


                                                        
           Common stock                                  18              18


                                                                Additional paid-in capital             1,974,219       1,970,708


                                                        
           Accumulated deficit                  (1,600,412)    (1,574,185)


                                                                Accumulated other comprehensive
                                                                 income                                    7,990           8,080


                                                                          Total stockholders' equity       381,815         404,621


                                                                                                        $1,137,477      $1,162,554



             RIBBON COMMUNICATIONS INC.



             Consolidated Statements of Cash Flows



             (in thousands)



             (unaudited)






                                                                                      
            Three months ended


                                                                                        March 31,                 March 31,


                                                                                             2025                       2024



             Cash flows from operating activities:


      
             Net loss                                                                $(26,227)                 $(30,361)


                Adjustments to reconcile net loss to cash flows (used in) provided by
                 operating activities:


                  Depreciation and amortization of property and equipment                   3,469                      3,394


        
             Amortization of intangible assets                                        11,543                     13,257


                  Amortization of debt issuance costs and original issue
                   discount                                                                   701                        716


                  Amortization of accumulated other comprehensive gain related
                   to interest rate swap                                                        -                   (1,756)


        
             Stock-based compensation                                                  4,298                      4,522


        
             Deferred income taxes                                                   (4,628)                   (2,620)


        
             Change in fair value of warrant liability                               (1,735)                       632


                  Change in fair value of preferred stock liability                             -                     1,512


                  Dividends accrued on preferred stock liability                                -                     1,355


        
             Foreign currency exchange (gains) losses                                (1,328)                     1,144


        
             Changes in operating assets and liabilities:


          
             Accounts receivable                                                    29,459                     55,384


          
             Inventory                                                             (1,546)                   (4,379)


          
             Other operating assets                                                (5,578)                     7,923


          
             Accounts payable                                                      (2,184)                  (17,837)


                    Accrued expenses and other long-term liabilities                      (9,631)                  (11,800)


          
             Deferred revenue                                                        (148)                   (7,986)


                      Net cash (used in) provided by operating activities                 (3,535)                    13,100





             Cash flows from investing activities:


      
             Purchases of property and equipment                                      (12,149)                   (2,513)


      
             Purchases of software licenses                                                  -                     (150)


            
             Net cash used in investing activities                              (12,149)                   (2,663)





             Cash flows from financing activities:


      
             Borrowings under revolving line of credit                                       -                    15,000


      
             Principal payments on revolving line of credit                                  -                  (15,000)


      
             Principal payments of term debt                                             (875)                   (5,014)


      
             Proceeds from the exercise of stock options                                     1                         17


                Payment of tax obligations related to vested stock awards
                 and units                                                                  (938)                     (846)


            
             Net cash used in financing activities                               (1,812)                   (5,843)





             Effect of exchange rate changes on cash and cash equivalents                    831                      (293)





             Net (decrease) increase in cash and cash equivalents                       (16,665)                     4,301



             Cash, cash equivalents and restricted cash, beginning of year                90,479                     26,630



             Cash, cash equivalents and restricted cash, end of period                   $73,814                    $30,931



              RIBBON COMMUNICATIONS INC.



              Supplemental Information



              (in thousands)



              (unaudited)







              The following tables provide the details of stock-based compensation included as components
    of other line items in the Company's Consolidated Statements of Operations and the line items
    in which these amounts are reported.






                                                                                           
               Three months ended


                                                                                  March 31,                  December 31,  March 31,


                                                                                       2025                           2024        2024



              
                
                  Stock-based compensation



              Cost of revenue - product                                                $66                            $66        $106



              Cost of revenue - service                                                286                            288         472


                 Cost of revenue                                                        352                            354         578





              Research and development                                                 725                            737       1,068



              Sales and marketing                                                    1,173                          1,178       1,157



              General and administrative                                             2,048                          1,756       1,719


                 Operating expense                                                    3,946                          3,671       3,944




                   Total stock-based
                    compensation                                                     $4,298                         $4,025      $4,522



     RIBBON COMMUNICATIONS INC.



     Reconciliation of Non-GAAP and GAAP Financial Measures



     (in thousands, except per share amounts)



     (unaudited)






                                                                                                                        
     Three months ended


                                                                                                              March 31,         December 31,  March 31,


                                                                                                                   2025                  2024        2024





     
                
                  GAAP Gross margin                                                              45.4 %               55.7 %     51.2 %



     Stock-based compensation                                                                                    0.2 %                0.2 %      0.3 %



     Amortization of acquired technology                                                                         3.0 %                2.2 %      3.6 %



     
                
                  Non-GAAP Gross margin                                                          48.6 %               58.1 %     55.1 %





     
                
                  GAAP Net income (loss)                                                      $(26,227)               $6,364   $(30,361)



     Stock-based compensation                                                                                    4,298                 4,025       4,522



     Amortization of intangible assets                                                                          11,543                11,785      13,257



     Litigation costs                                                                                              800                 1,583         951



     Restructuring and related                                                                                   5,341                 1,381       3,065



     Preferred stock and warrant liability mark-to-market adjustment                                           (1,735)                2,478       3,499



     Tax indemnification write-off                                                                                   -                6,313



     Tax effect of non-GAAP adjustments                                                                          1,401               (5,648)      3,971



     
                
                  Non-GAAP Net income (loss)                                                   $(4,579)              $28,281    $(1,096)





     
                
                  GAAP Diluted earnings (loss) per share                                        $(0.15)                $0.04     $(0.18)



     Stock-based compensation                                                                                     0.02                  0.02        0.03



     Amortization of intangible assets                                                                            0.07                  0.06        0.07



     Litigation costs                                                                                      
      *                        0.01        0.01



     Restructuring and related                                                                                    0.03                  0.01        0.02



     Preferred stock and warrant liability mark-to-market adjustment                                            (0.01)                 0.01        0.02



     Tax indemnification write-off                                                                                   -                 0.04



     Tax effect of non-GAAP adjustments                                                                           0.01                (0.03)       0.02



     
                
                  Non-GAAP Diluted earnings (loss) per share                                    $(0.03)                $0.16     $(0.01)





     
                
                  Weighted average shares used to compute diluted earnings (loss) per share



      Shares used to compute GAAP diluted earnings (loss) per share                                            175,719               175,321     172,428



      Shares used to compute Non-GAAP diluted earnings (loss) per share                                        175,719               178,703     172,428





     
                
                  GAAP Income (loss) from operations                                          $(19,610)              $33,220   $(13,486)



     Depreciation                                                                                                3,469                 3,408       3,394



     Stock-based compensation                                                                                    4,298                 4,025       4,522



     Amortization of intangible assets                                                                          11,543                11,785      13,257



     Litigation costs                                                                                              800                 1,583         951



     Restructuring and related                                                                                   5,341                 1,381       3,065



     
                
                  Non-GAAP Adjusted EBITDA                                                       $5,841               $55,402     $11,703





     * Less than $0.01 impact on earnings (loss) per share.



     RIBBON COMMUNICATIONS INC.



     Reconciliation of Non-GAAP and GAAP Financial Measures



     (in thousands)



     (unaudited)






                                                                               Trailing Twelve
                                                                                      Months


                                                                     March 31,     December 31,   March 31,


                                                                          2025               2024        2024





     
                
                  GAAP Income (loss) from operations   $10,748            $16,872    $(2,582)



     Depreciation                                                      13,614             13,539      13,989



     Stock-based compensation                                          15,862             16,086      20,480



     Amortization of intangible assets                                 49,148             50,862      55,495



     Litigation costs                                                  11,047             11,198       2,081



     Acquisition-, disposal- and integration-related                        -                        2,834



     Restructuring and related                                         12,436             10,160      12,337



     
                
                  Non-GAAP Adjusted EBITDA            $112,855           $118,717    $104,634



     RIBBON COMMUNICATIONS INC.



     Reconciliation of Non-GAAP and GAAP Financial Measures - Outlook



     (unaudited)








                                                                                                                                               Three months ending                                  Year ending


                                                                                                                                                  June 30, 2025                                 December 31, 2025


                                                                                                                                      Midpoint                            Range      Midpoint
                                                                                                                                          (1)                                              (1)                              Range





     
                
                  Revenue ($ millions)                                                                           $215           +/-$5M                          $880                +/-$10M





     
                
                  Gross margin:


                                                                                                   GAAP outlook                        50.65 %                                          52.0 %


                                                                   
       Stock-based compensation                                         0.20 %                                           0.2 %


                                                                       Amortization of acquired technology                              2.40 %                                           2.3 %


                                                                                                   Non-GAAP outlook                    53.25 %                              +/-
                                                                                                                                                                          0.25%         54.5 %                           +/- 0.5%





     
                
                  Adjusted EBITDA ($ millions):


                                                                                                   GAAP income (loss) from operations     $9.3                                            $49.7


                                                                   
       Depreciation                                                        4.0                                             15.8


                                                                   
       Stock-based compensation                                            4.0                                             16.2


                                                                       Amortization of intangible assets                                  11.3                                             44.1


                                                                   
       Litigation costs                                                    0.3                                              1.2


                                                                   
       Restructuring and related                                           1.1                                              8.0


                                                                                                   Non-GAAP outlook                      $30.0                     +/-$2M                $135.0                   +/-$5M






                                                                       (1) Q2 2025 and FY 2025 outlook represents the midpoint of the
                                                                        expected ranges

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SOURCE Ribbon Communications Inc.