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RBBN vs EGHT // ALTMAN Z-SCORE & DEBT/EQUITY

Ribbon Communications Inc. (NASDAQ) VS. 8x8 Inc (NASDAQ) • 15-METRIC TALLY: RBBN 1 — EGHT 8
■ METRIC PARITY
15-METRIC INSTITUTIONAL SIDE-BY-SIDE SCORECARD (RBBN VS. EGHT) EMERALD CELL = QUANTITATIVE EDGE
INSTITUTIONAL METRIC RBBN EGHT SPREAD (A - B) ADVANTAGE DEDICATED URL
Gross Profit Margin 49.80% 64.60% -14.80 EGHT /gross-margins <GO>
Return on Invested Capital (ROIC) -0.40% 4.30% -4.70 EGHT /roic <GO>
EV/EBITDA & P/E Valuation — 24.3x — TIE /valuation <GO>
Free Cash Flow Yield 8.92% 15.89% -6.97 EGHT /fcf-yield <GO>
Operating Margin -0.40% 2.60% -3.00 EGHT /operating-margins <GO>
Net Profit Margin 0.00% 0.20% -0.20 EGHT /net-margins <GO>
Revenue Growth (YoY) 1.30% 2.90% -1.60 EGHT /revenue-growth <GO>
Dividend Yield & FCF Payout Safety 0.00% 0.00% 0.00 TIE /dividend-safety <GO>
Altman Z-Score & Debt/Equity ACTIVE 0.20 0.20 0.00 TIE /balance-sheet <GO>
Piotroski F-Score Quality 8/9 7/9 +1.00 RBBN /piotroski-score <GO>
Options Implied Move & Put/Call Skew — — — TIE /options-implied-move <GO>
RSI-14 & 200D SMA Momentum 48.0 48.4 -0.40 EGHT /rsi-technicals <GO>
10Y Yield & FRED Macro Beta — — — TIE /macro-sensitivity <GO>
Forward P/E Multiple — — — TIE /forward-pe <GO>
Enterprise Scale & Market Cap $277.7M $301.9M -$24.2M EGHT /market-cap <GO>
5-YEAR HISTORICAL XBRL REVENUE & MARGIN TRAJECTORY SEC FORM 10-K FY
FISCAL YEAR RBBN REV EGHT REV RBBN GROSS % EGHT GROSS % RBBN FCF EGHT FCF
FY 2025 $844.6M $735.8M 49.8% 64.6% $26.1M $52.1M
FY 2024 $833.9M $715.1M 52.7% 67.9% $27.8M $61.2M
FY 2023 $826.3M $728.7M — — $17.1M $79.0M
FRED MACRO REGIME CORRELATION COMPARISON PEARSON r
RBBN // BETA —
EGHT // BETA —