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Zacks Company Profile for Ribbon Communications Inc. (RBBN : NSDQ)

• Company Description    Ribbon Communications Inc. develops communication software. It provides session border controllers, diameter signals, policy and routing servers, media and signaling gateways, cloud and mobility solutions. Ribbon Communications Inc., formerly known as Sonus Networks Inc., is headquartered in Westford, Massachusetts. Number of Employees: 3,080

• Price / Volume Information    Yesterday's Closing Price: $2.75 Daily Weekly Monthly 20 Day Moving Average: 1,163,716 shares Shares Outstanding: 175.51 (millions) Market Capitalization: $482.65 (millions) Beta: 1.26 52 Week High: $4.29 52 Week Low: $1.80 Short Interest Ratio:   % Price Change % Price Change Relative to S&P 500 4 Week 26.15% 14.85% 12 Week 40.31% 34.53% Year To Date -4.51% -9.59%

• Address & Contact Information Street Address Phone / Fax Email Address Web URL 6500 Chase Oaks Boulevard Suite 100 - Plano,TX 75023 USA ph: 978-614-8100 fax: 978-614-8101 ir@ribbn.com http://www.ribboncommunications.com

• General Corporate Information    Officers Bruce McClelland - President and Chief Executive Officer Shaul Shani - Chairman John Townsend - Executive Vice President and Chief Financial Offic Eric Marmurek - Senior Vice President and Deputy Chief Financial O Stewart Ewing - Director Peer Information Ribbon Communications Inc. (GNSS) Ribbon Communications Inc. (ENETF) Ribbon Communications Inc. (CLRN) Ribbon Communications Inc. (UPHN) Ribbon Communications Inc. (RBBN) Ribbon Communications Inc. (ZPLSQ) Industry / Sector / Ticker Info Analyst Coverage: No Industry Group: Comm Network Software Sector: Computer and Technology CUSIP: 762544104 SIC: 7373 Fiscal Year Fiscal Year End: December Last Reported Quarter: 03/01/26 Next Expected EPS Date: 07/22/26 Share - Related Items Shares Outstanding: 175.51 Most Recent Split Date: 1.00 (0.20:1) Beta: 1.26 Market Capitalization: $482.65 (millions)

• EPS Information     • Dividend Information Analyst Coverage: No Dividend Yield: 0.00% Current Fiscal Quarter EPS Consensus Estimate: $-0.04 Indicated Annual Dividend: $0.00 Current Fiscal Year EPS Consensus Estimate: $0.02 Payout Ratio: 0.00 Number of Estimates in the Fiscal Year Consensus: 2.00 Change In Payout Ratio: 0.00 Estmated Long-Term EPS Growth Rate: % Last Dividend Paid: NA - $0.00 Next EPS Report Date: 07/22/26

• Fundamental Ratios P/E Current FY Estimate: 137.50 Trailing 12 Months: 5.29 PEG Ratio: - Price Ratios Price/Book: 1.08 Price/Cash Flow: 2.92 Price / Sales: 0.58 EPS Growth vs. Year Ago Period: -80.00% vs. Previous Quarter: -115.79% Sales Growth vs. Year Ago Period: -10.30% vs. Previous Quarter: -28.47% ROE 03/31/26 - 24.53 12/31/25 - 26.11 09/30/25 - 6.49 ROA 03/31/26 - 8.36 12/31/25 - 8.87 09/30/25 - 2.17 Current Ratio 03/31/26 - - 12/31/25 - 1.44 09/30/25 - 1.43 Quick Ratio 03/31/26 - - 12/31/25 - 1.19 09/30/25 - 1.16 Operating Margin 03/31/26 - 11.68 12/31/25 - 12.07 09/30/25 - 2.84 Net Margin 03/31/26 - 3.80 12/31/25 - 4.69 09/30/25 - -4.96 Pre-Tax Margin 03/31/26 - - 12/31/25 - -5.34 09/30/25 - -4.24 Book Value 03/31/26 - - 12/31/25 - 2.54 09/30/25 - 2.04 Inventory Turnover 03/31/26 - - 12/31/25 - 5.32 09/30/25 - 5.38 Debt-to-Equity 03/31/26 - - 12/31/25 - 0.72 09/30/25 - 0.91 Debt-to-Capital 03/31/26 - - 12/31/25 - 41.95 09/30/25 - 47.52

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