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DexCom (DXCM): analysis traps
Where its figures could mislead a reader, and what to check before taking them at face value · Data: Q3 2026, to Sep 30, 2026, filed Oct 29, 2026; rules v1.1
DexCom (DXCM): 0 rules of 10 triggered on the filings to Sep 30, 2026. 1 to review; 2 with insufficient data; 2 not applicable. Each is a question to verify, with the normal explanation that would produce the same figures.
Check these first
A precise DCF value = the true value To review · confidence high
The DCF's point value is 43.28 a share (price 79.91); 72% of it is the terminal value, a number about years no one has seen. Moving revenue growth (each year) by ±5 pts alone takes it from 35.94 to 52.00; across every method the research ran the range is 15 to 144. The value is a range; the decimals are not information.
Innocent reading: A stable, mature business with a narrow range of outcomes, where the point value is a fair summary.
Every rule
A01 FCF growth = the business improved Not triggered confidence medium
Free cash flow rose $446M to $1.1B; working capital and lower capex explain 0% of it, so most of the gain is in operating cash flow itself.
The figures and how they are read
| Fiscal year before | FY2024 |
| Fiscal year | FY2025 |
| Operating cash flow, year before | $990M |
| Operating cash flow | $1.4B |
| Capex, year before | $359M |
| Capex | $364M |
| Free cash flow, year before | $631M |
| Free cash flow | $1.1B |
| Change in FCF | $446M |
| Change in capex | $5M |
| Working capital: change in its cash contribution | −$1M |
| Of which: capex cut | 0.00 |
| Of which: working capital released | 0.00 |
| Share of the increase that need not repeat | +0.0% |
| Operating cash flow before working capital: change | 452500000.00 |
FCF = operating cash flow − cash capex; ΔFCF = ΔOCF − ΔCapEx; the working-capital part is the change in the cash-bridge items (receivables, inventory, payables, accruals), with the sign of the cash flow statement
Source: FY2025 (cash flow statement, fiscal year) · FY2024 (cash flow statement, fiscal year before)
A07 Stock compensation added back = no economic cost Not triggered confidence high
Stock compensation is 3.4% of revenue, but buybacks of $500M covered it (3.1×) and the diluted share count fell 1.7%: the dilution has been paid for in cash.
The figures and how they are read
| Fiscal year | FY2025 |
| Stock compensation | $160M |
| Revenue | $4.7B |
| SBC / revenue | +3.4% |
| Buybacks | $500M |
| Buybacks / SBC | 3.1 |
| Diluted shares, year before | 412.7M shares |
| Diluted shares | 405.5M shares |
| Diluted shares: change | -1.7% |
SBC / revenue from the cash flow statement's add-back; the diluted weighted share count year over year; buybacks from the financing section
Source: FY2025 (stock compensation, buybacks and the diluted share count, fiscal year)
B02 Receivables growing = future cash is certain Not triggered confidence medium
Receivables grew 7% against revenue 11% in Q3 2026; DSO 84 against a median of 87: collections are keeping pace with sales.
The figures and how they are read
| Quarter | Q3 2026 |
| Revenue, year over year | +11.2% |
| Receivables, year over year | +6.9% |
| Quarter before | Q2 2026 |
| Revenue y/y, quarter before | +13.1% |
| Receivables y/y, quarter before | -6.8% |
| Days sales outstanding | 83.6 |
| DSO, median of eight quarters | 87.0 |
| Receivables | $1.2B |
| Revenue | $1.3B |
receivables and revenue against the same quarter a year earlier; DSO = receivables / quarterly revenue × days, against the median of the eight quarters before
Source: Q3 2026 (receivables and revenue) · Q3 2025 (the same quarter a year earlier)
B08 Adjusted profit = economic profit Insufficient data
no reconciliation table read from the releases yet and fewer than three quarters with both an adjusted and a GAAP EPS
C02 Low net debt = no refinancing risk Insufficient data
no debt figure could be read from the balance sheet (the filing may tag it in other lines)
D03 EPS growth = profit growth Not triggered confidence high
EPS rose 3% and net income fell 3% in Q3 2026; the share count fell 5.9%: EPS growth follows profit growth.
The figures and how they are read
| Quarter | Q3 2026 |
| Quarter before | Q3 2025 |
| EPS, year before | $0.70 |
| EPS | $0.72 |
| Net income, year before | $284M |
| Net income | $275M |
| Diluted shares, year before | 407.4M shares |
| Diluted shares | 383.5M shares |
| EPS growth | +2.9% |
| Net income growth | -3.1% |
| Diluted shares: change | -5.9% |
| eps from profit | -$0.02 |
| eps from share count | $0.04 |
EPS and net income against the same quarter a year earlier; the EPS bridge attributes the change to profit first, then to the share count (the order is fixed and disclosed)
Source: Q3 2026 (net income, diluted shares, EPS) · Q3 2025 (the same quarter a year earlier)
E02 Low P/E at a cyclical peak = undervalued Not triggered confidence medium
Net income of $991M is a high, but the last eight years rose almost every year (median $494M): a steady climb, not a cycle's top, so the P/E of 30.9× is not on peak profit in that sense.
The figures and how they are read
| market value | $30.6B |
| net income ttm | $991M |
| pe ttm | 30.90 |
| net income median fy | $494M |
| pe mid cycle | 62.10 |
| net income peak fy | $836M |
| years | FY2018 / -127.0; FY2019 / 101.0; FY2020 / 494.0; FY2021 / 155.0; FY2022 / 341.0; FY2023 / 542.0; FY2024 / 576.0; FY2025 / 836.0 |
| down years in window | 1 |
P/E on the trailing twelve months' net income against the P/E on the median net income of the last eight fiscal years (a mid-cycle stand-in); 'at a peak' = this year's profit at or above 90% of the best year and at least 1.3× the median
Source: Q3 2026 (net income, trailing twelve months)
E07 A precise DCF value = the true value To review confidence high
The DCF's point value is 43.28 a share (price 79.91); 72% of it is the terminal value, a number about years no one has seen. Moving revenue growth (each year) by ±5 pts alone takes it from 35.94 to 52.00; across every method the research ran the range is 15 to 144. The value is a range; the decimals are not information.
The figures and how they are read
| dcf value | 43.28 |
| price | 79.91 |
| terminal value share | +71.5% |
| swing by input | Revenue growth (each year) / ±5 pts / 35.94 / 52.0; WACC / ±1 pt / 38.44 / 49.59; Operating margin / ±3 pts / 38.06 / 48.5; Tax rate / ±5 pts / 40.62 / 45.94 |
| range all methods | 15.0; 143.99 |
the DCF's point value against the share of it that is the terminal value and the value at each input moved by one step (growth ±5 pts, WACC ±1 pt, margin ±3 pts …); the range across every method the research ran
Source: 2026-11-08 (valuation research)
What would explain it innocently
- A stable, mature business with a narrow range of outcomes, where the point value is a fair summary
- The inputs that matter most are themselves well known (a regulated return, a long contract)
What to look for in the filing
- Which input you believe differs from the research's and why
- What the price implies for growth (the reverse DCF on the fair-value page)
What would show the trap does not apply
- The DCF's value is robust to the terminal growth and discount rate (the range's low end is still above the price)
- The company's cash flows over the next three years track the DCF's early years
Look again: next filing.
J06 A bank's low P/E and high profit = safe Not applicable
not a bank
J08 A REIT's low net income = the dividend is unsafe Not applicable
not a REIT
What the statuses mean
Triggered: the filings show the pattern; read the normal explanations and the missing evidence before concluding anything. To review: one quarter or a weak signal; a reader's judgement, not a pattern. Not triggered: the pattern is absent on these figures. Insufficient data: the filings read so far do not hold what the rule needs; this is not a clean bill. Not applicable: the rule is not meant for this kind of company (a bank's working capital, a loss-making quarter's EPS growth). Out of date: the latest filing is more than fifteen months old.
Severity is what the pattern could mean for cash, value or solvency; confidence is how reliable the inputs and the reading are. The two are kept apart.
Record a view
A reader's judgement, grounds, what would change it and the next review; kept in the browser (needs JavaScript).
Every rule and the companies it triggers on → DexCom: cash flow → Earnings quality score →
Each rule reads the company's own filings by a fixed formula and says what would explain the same figures innocently. A triggered rule is a question to verify, not a finding of manipulation, and not a view on the stock. Missing data is shown as missing, never as clear. Not investment advice.