Ribbon Communications Inc. (RBBN) P/E Ratio History
Deep ValueTrading at 8.4x · 0th percentile of 5-year range · Significant discount to historical valuation · Data 2004–2026
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P/E Ratio Analysis
As of September 23, 2026, Ribbon Communications Inc. (RBBN) trades at a price-to-earnings ratio of 8.4x, with a stock price of $1.84 and trailing twelve-month earnings per share of $0.09.
The current P/E is 83% below its 5-year average of 49.4x. Over the past five years, RBBN's P/E has ranged from a low of 11.0x to a high of 143.9x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Communication Services sector median P/E of 14.9x, RBBN trades at a 44% discount to its sector peers. The sector includes 106 companies with P/E ratios ranging from 0.1x to 191.8x.
Relative to the broader market, RBBN trades at a notable discount to the S&P 500 median P/E of 25.5x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our RBBN DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
RBBN Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
RBBN P/E vs Peers
Cloud Voice and UCaaS Providers peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $282M | 199.0 | - | +105% | |
| $9B | 242.7 | 53.17 | +225%Best | |
| $420B | 32.0 | 5.42Best | +31% | |
| $52B | 433.6 | - | +47% | |
| $2B | 135.2 | - | +158% | |
| $172B | 8.3Lowest | - | +104% | |
| $194B | 11.4 | - | -2% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
RBBN Historical P/E Data (2004–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q2 | - | $2.34 | $0.08 | 28.7x | -49% |
| FY2026 Q1 | - | $2.12 | $0.17 | 12.6x | -78% |
| FY2025 Q4 | Dec 31 2025 | $2.88 | $0.22 | 13.2x | -77% |
| FY2021 Q3 | - | $5.98 | $0.25 | 23.9x | -57% |
| FY2021 Q2 | Jun 30 2021 | $7.61 | $0.69 | 11.0x | -80% |
| FY2021 Q1 | Mar 31 2021 | $8.21 | $0.48 | 17.0x | -70% |
| FY2020 Q4 | - | $6.56 | $0.52 | 12.5x | -78% |
| FY2019 Q3 | Sep 30 2019 | $5.84 | $0.15 | 38.2x | -32% |
| FY2019 Q2 | Jun 30 2019 | $4.89 | $0.05 | 106.1x | +89% |
| FY2010 Q2 | Jun 30 2010 | $13.55 | $0.13 | 103.3x | +84% |
| FY2010 Q1 | Mar 31 2010 | $13.15 | $0.23 | 58.3x | +4% |
| FY2007 Q3 | Sep 30 2007 | $30.50 | $0.73 | 41.6x | -26% |
| FY2007 Q2 | Jun 30 2007 | $42.60 | $1.54 | 27.6x | -51% |
| FY2007 Q1 | Mar 31 2007 | $40.35 | $1.82 | 22.1x | -61% |
| FY2006 Q4 | Dec 31 2006 | $32.95 | $2.00 | 16.5x | -71% |
| FY2006 Q3 | Sep 30 2006 | $26.25 | $0.65 | 40.4x | -28% |
| FY2006 Q2 | Jun 30 2006 | $24.75 | $0.30 | 83.7x | +49% |
| FY2006 Q1 | Mar 31 2006 | $27.40 | $0.35 | 79.3x | +41% |
| FY2005 Q4 | Dec 31 2005 | $18.60 | $0.17 | 108.6x | +93% |
| FY2005 Q3 | Sep 30 2005 | $28.95 | $0.20 | 143.9x | +156% |
| FY2005 Q2 | - | $23.85 | $0.46 | 52.4x | -7% |
| FY2005 Q1 | - | $21.20 | $0.36 | 59.6x | +6% |
| FY2004 Q4 | Dec 31 2004 | $28.65 | $0.48 | 59.7x | +6% |
| FY2004 Q3 | - | $28.15 | $0.15 | 187.7x | +234% |
Average P/E for displayed period: 56.2x
RBBN Chart Terminal
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Intrinsic Valuation
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Historical Returns
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Peer Comparison
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RBBN — Frequently Asked Questions
Quick answers to the most common questions about buying RBBN stock.
What is RBBN's P/E ratio?
Ribbon Communications Inc. (RBBN) trailing twelve-month P/E ratio is 8.4x, based on TTM diluted EPS of $0.09. The 5-year average P/E is 49.4x and the historical range spans 11.0x to 143.9x.
Is RBBN stock overvalued or undervalued?
RBBN trades at 8.4x P/E, below its 5-year average of 49.4x. At the 0th percentile of its historical range (11.0x–143.9x), the stock is priced at a discount to its own history.
Is RBBN stock expensive?
No, RBBN is not expensive on a historical basis. The current P/E of 8.4x is below the 5-year average of 49.4x and sits at the 0th percentile of its valuation range.
What is RBBN's historical P/E range?
Over the past 5 years, RBBN's P/E ratio has ranged from 11.0x to 143.9x, with a median of 38.2x and an average of 49.4x. The current P/E of 8.4x places the stock at the 0th percentile of this range. Full historical data spans 2004–2026.
How does RBBN's P/E compare to the S&P 500?
RBBN trades at 8.4x P/E versus the S&P 500 median of 25.5x. The 67% discount to the market suggests lower growth expectations or perceived higher risk.
How does RBBN's valuation compare to Communication Services peers?
Ribbon Communications Inc. P/E of 8.4x compares to the Communication Services sector median of 14.9x. The discount suggests lower growth expectations, weaker margins, or higher perceived risk relative to peers. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is RBBN's PEG ratio?
RBBN PEG ratio is N/A, based on a P/E of 8.4x and EPS growth of 171.0%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is RBBN's earnings yield?
RBBN earnings yield is 11.96%, the inverse of its 8.4x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.