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Ribbon Communications Inc. (RBBN)

Ribbon Communications Inc. at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

Ribbon Communications Inc. (RBBN) is a Telecommunications Services company based in US with a market capitalization of $534.8M. Revenue grew 1.3% year-over-year and the company generated $26.1M in free cash flow. This page tracks RBBN's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

US · 3.05K employees · IPO May 25, 2000

Valuation

Valuation & price

$2.57 · as of May 17, 2026 · -39.5% vs 52w high

11.7

P/E ratio

Latest-FY diluted EPS

1.19

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$4.25$3.11$1.97Jul 25Dec 25Jul 26Jul 7, 25$4.08Jul 9, 25$4.07Jul 11, 25$4.01Jul 15, 25$3.88Jul 17, 25$3.99Jul 21, 25$4.07Jul 23, 25$4.25Jul 25, 25$3.83Jul 29, 25$3.87Jul 31, 25$3.76Aug 4, 25$3.63Aug 6, 25$3.79Aug 11, 25$4.02Aug 13, 25$4.08Aug 15, 25$3.87Aug 19, 25$3.74Aug 21, 25$3.74Aug 25, 25$3.93Aug 27, 25$3.99Aug 29, 25$4.08Sep 3, 25$4.01Sep 5, 25$3.99Sep 9, 25$4.05Sep 11, 25$3.94Sep 16, 25$3.82Sep 18, 25$3.97Sep 22, 25$3.87Sep 24, 25$3.87Sep 26, 25$3.75Sep 30, 25$3.80Oct 2, 25$3.77Oct 6, 25$3.84Oct 8, 25$3.76Oct 10, 25$3.60Oct 14, 25$3.81Oct 16, 25$3.81Oct 21, 25$4.04Oct 23, 25$3.45Oct 27, 25$3.45Oct 29, 25$3.45Oct 31, 25$3.36Nov 4, 25$3.17Nov 6, 25$3.16Nov 10, 25$3.27Nov 12, 25$3.24Nov 14, 25$3.08Nov 18, 25$2.79Nov 20, 25$2.76Nov 25, 25$2.82Nov 28, 25$2.86Dec 2, 25$2.82Dec 4, 25$2.77Dec 8, 25$2.87Dec 10, 25$3.02Dec 12, 25$2.98Dec 16, 25$2.89Dec 18, 25$2.91Dec 22, 25$2.94Dec 24, 25$2.94Dec 29, 25$2.94Jan 2, 26$2.90Jan 6, 26$2.83Jan 8, 26$2.79Jan 12, 26$2.81Jan 14, 26$2.81Jan 16, 26$2.81Jan 21, 26$2.65Jan 23, 26$2.70Jan 27, 26$2.77Jan 29, 26$2.68Feb 2, 26$2.76Feb 4, 26$2.69Feb 9, 26$2.00Feb 11, 26$1.97Feb 13, 26$2.09Feb 18, 26$2.02Feb 20, 26$2.08Feb 24, 26$2.20Feb 26, 26$2.26Mar 2, 26$2.43Mar 4, 26$2.37Mar 6, 26$2.15Mar 10, 26$2.25Mar 12, 26$2.15Mar 17, 26$2.20Mar 19, 26$2.20Mar 23, 26$2.25Mar 25, 26$2.20Mar 27, 26$2.13Mar 31, 26$2.12Apr 2, 26$2.18Apr 7, 26$2.25Apr 9, 26$2.25Apr 13, 26$2.38Apr 15, 26$2.62Apr 17, 26$2.81Apr 22, 26$2.75Apr 24, 26$2.78Apr 28, 26$2.60Apr 30, 26$2.64May 4, 26$2.67May 6, 26$2.68May 8, 26$2.78May 12, 26$2.55May 14, 26$2.63May 18, 26$2.64May 20, 26$2.61May 22, 26$2.79May 28, 26$3.08Jun 1, 26$3.09Jun 3, 26$3.12Jun 5, 26$2.83Jun 9, 26$2.66Jun 11, 26$2.70Jun 15, 26$2.72Jun 17, 26$2.56Jun 22, 26$2.49Jun 24, 26$2.31Jun 26, 26$2.20Jul 2, 26$2.23
$1.9552-week range$4.25
Loading valuation history…

Fundamentals

Key fundamentals

$534.8M

Market cap

1.3%

Revenue growth (YoY)

47.0%

Gross margin

$26.1M

Free cash flow (USD)

$308.7M

Net debt

1.2%

Share dilution

2/5

Graham criteria passed

Defensive-investor screen

Communication Services

Sector

Trajectory

Long-term trends

Revenue by year

2016 → 2025

FY 2016$252.6MFY 2017$329.9MFY 2018$577.9MFY 2019$563.1MFY 2020$843.8MFY 2021$845.0MFY 2022$819.8MFY 2023$826.3MFY 2024$833.9MFY 2025$844.6M
$252.6M$844.6M

Free cash flow by year

2016 → 2025

FY 2016$14.6MFY 2017$4.1MFY 2018$-17.5MFY 2019$44.9MFY 2020$74.8MFY 2021$2.0MFY 2022$-39.9MFY 2023$7.6MFY 2024$27.4MFY 2025$26.1M
$14.6M$26.1M

Gross margin by year

2021 → 2025

FY 202152.6%FY 202248.9%FY 202345.9%FY 202452.7%FY 202547.0%
52.6%47.0%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

0

Insider sells · 90 days

Earnings

Last report: 10-Q filed May 6, 2026

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • 8-K eventInvestor PresentationJun 17, 2026Filing
  • 8-K eventAnnual Meeting ResultsJun 5, 2026Filing
  • Quarterly report10-Q FiledMay 6, 2026Filing
  • 8-K eventEarnings ReleaseApr 28, 2026Filing
  • 8-K eventDirector AppointmentApr 15, 2026Filing

Questions

Frequently asked questions

What is Ribbon Communications Inc.'s market cap?

Ribbon Communications Inc. (RBBN) has a market capitalization of $534.8M.

What is RBBN's P/E ratio?

RBBN trades at a price-to-earnings ratio of 11.7, based on its latest fiscal-year diluted earnings per share and the most recent cached price.

What is RBBN's price-to-book (P/B) ratio?

RBBN trades at 1.19 times book value per share.

Are insiders buying RBBN stock?

SEC Form 4 filings show no open-market insider buys at Ribbon Communications Inc. in the last 90 days (0 sells).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

Filing Analyzer

Search the actual 10-K / 10-Q text with AI research angles

News

Latest press coverage in one feed

Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.