RNG, RingCentral Inc.

Will it survive?

• Can it pay its interest? 2.0×
  Thin
  Operating income $121M ÷ interest expense $60M
  What this means

  Operating profit covers interest, but with little room. A bad year, a refinancing at higher rates, or a revenue wobble closes the gap fast.

• How heavy is the debt, net of cash? $1.5B · 12.3× operating profit
  Heavy net debt
  Cash $133M + ST investments $28M − debt $1.6B
  What this means

  Netting $161M of cash and short-term investments against $1.6B of debt leaves $1.5B owed, about 12.3× a year's operating profit (13.6× on the gross debt, before the cash). Net debt is the leverage figure that matters: the cash is already set against the debt. Strategic or illiquid investments aren't counted here.

• How long is cash tied up? 42d
  Tight
  DSO 56 + DIO 0 − DPO 14 days
  What this means

  Days cash is tied up between paying suppliers and collecting from customers. Lower is better; a long cycle means growth itself eats cash.

Is it a good business?

• Return on invested capital -11%
  Below average through the cycle
  9-yr median, range -58%–17%; 10% latest = NOPAT $93M ÷ invested capital $918M
  Industry peers: median 4%
  What this means

  The rate the business earns on the money tied up in it, Buffett's north star, because over time a stock tracks the ROIC beneath it. Above ~15% sustained hints at a moat; a return below the cost of capital (~8%) erodes value as a business grows rather than building it — the test Buffett weighs most. The headline is the median of the last 9 years (it ran 10% most recently), so one peak or trough year doesn't set the verdict. Asset-light businesses (R&D expensed, little capital) read artificially high, pair this with Owner Earnings.

• Owner-earnings margin 7%
  Solid through the cycle
  10-yr median margin, range -7%–23%; latest $587M = operating cash $617M − maintenance capex $30M
  Industry peers: median 17%
  What this means

  What an owner could take out without starving the business: operating cash less the maintenance capital it must spend to hold its position — Buffett's owner earnings. That's 23% of revenue this year, a 7% median across 10 years. Treating stock comp as the real expense it is (less $270M of SBC) leaves $318M.

• Are earnings backed by cash? 14.23×
  Cash-backed
  Cash from ops $617M ÷ net income $43M
  What this means

  How much of reported profit showed up as operating cash. Above 1× is reassuring; well below suggests earnings lean on accruals. One year is noisy, growth and working-capital swings distort it, and this is operating cash, not free cash. Watch the multi-year trend.

How is the cash used?

• Where do the earnings go? 57%
  Returns about half
  Dividends + buybacks $334M ÷ Owner Earnings $587M
  What this means

  Of $587M Owner Earnings, $334M (57%) went back to shareholders, $0 dividends, $334M buybacks. Net of $270M stock comp, the real buyback was about $65M. Returning most of it is the mark of a mature business with little left to reinvest at a high return; reinvesting most could mean a long runway, or empire-building. The split doesn't say which; the return earned on it (see ROIC) does.

• Investing or harvesting? 0.14×
  Harvesting
  Capex $30M ÷ depreciation $223M
  What this means

  Descriptive, not a grade. Above ~1× means investing faster than assets wear out (growth, or, sustained for years, today's earnings carrying less depreciation than tomorrow's will). Below means spending less than it's wearing out (efficiency, or a melting asset base). The ratio won't tell you which; the filings will.

Graham’s defensive tests · 1 of 5 met

Graham’s numerical criteria for the defensive investor (The Intelligent Investor, ch. 14), run on the filings. A floor of safety, not a buy signal; many fine modern businesses fail his strictest liquidity rules by design.

• Adequate size Pass
  Revenue ≥ $2B · $2.5B
  What this means

  Big enough to weather a storm. Graham's 1972 floor was ~$100M of sales (≈ $700M today); we use a $2B revenue line as a conservative modern stand-in.

• Strong liquidity Miss
  Current ratio ≥ 2× · 0.63×
  What this means

  Current assets at least twice current liabilities, near-term bills covered without touching the business. Strict by design: many cash-rich modern firms run leaner and miss it, holding their cushion in longer-dated securities.

• Conservative debt Miss
  Debt ≤ working capital · $1.6B vs ($453M) WC
  What this means

  Graham's rule that borrowings not exceed net current assets. Capital-heavy and buyback-heavy firms routinely fail it, read it next to interest coverage, not alone.

• Earnings stability Miss
  A profit every year (10-yr record) · 9 loss years
  What this means

  Graham wanted earnings in each of the past ten years, the stability a defensive owner leans on.

• Dividend record Miss
  Uninterrupted dividends · none paid
  What this means

  An unbroken dividend was Graham's mark of durability. He wanted twenty years; the filings show about ten, and a single suspension breaks the streak. Non-payers, many fine modern compounders, fall outside his defensive net by design.

• Earnings growth —
  Earnings +33% over the record · —
  What this means

  Earnings were negative early in the record, a growth rate isn't meaningful.

• Moderate price —
  P/E ≤ 15 and P/E × P/B ≤ 22.5 · decided by the price
  What this means

  Graham's valuation gate, the wall he kept between a sound business and a sound investment. Three-year average earnings are $-0.71/share (latest year $0.51), the averaged base the calculator's gate runs on, and book value is $-6.95/share. Enter a price in “What the price implies” just below for the P/E, P/B, and whether it clears. But this is the rule Buffett outgrew: there's no hard P/E law, and a wonderful business can deserve a far richer multiple if the thesis holds, treat it as the bargain-hunter's floor, not a verdict on the price.

Durability & moat, 2016–2025

Whether the record’s returns held, and what the capital reinvested earned.

• Profitable years 1 of 10
  What this means

  Lost money in 9 year(s), look at what happened there before trusting the average.

• Return on capital ≥ 15% 1 of 9 yrs
  What this means

  A moat shows up as a high return on invested capital that holds year after year, not one good vintage.

• Operating margin −2% → −1% (3-yr avg ends)
  What this means

  Through the cycle the operating margin held roughly steady — about −2% early, −1% lately, median −5%.

• Reinvestment, incremental ROIC −3%
  What this means

  Reinvested capital came back at a negative incremental return over this window — the invested base grew while operating profit did not. The filings show where it went.

• Owner earnings growth +45%/yr
  What this means

  Owner earnings grew about 45% a year over the record.

• Worst year 2022 · −32.7% op. margin
  What this means

  Operations went underwater in 2022, understand why before trusting the good years.

• Share count +2.5%/yr
  What this means

  The share count is rising, dilution works against you on a per-share basis.

• How management talks about it Owner’s terms
  What this means

  The record and the register agree: capital is compounding and the filing reasons in an owner’s terms — per-share value, return on capital, the long term — not a promoter’s.