Comprehensive Stock Comparison
Compare CytomX Therapeutics, Inc. (CTMX) vs Vertex Pharmaceuticals Incorporated (VRTX) Stock
Analyze side-by-side fundamentals, valuation, growth, and profitability to decide which stock is the better buy.
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Quick Verdict
| Category | Winner | Why |
|---|---|---|
| Growth | CTMX | 36.4% revenue growth vs VRTX's 8.9% |
| Value | CTMX | Lower P/E (14.1x vs 25.7x) |
| Quality / Margins | VRTX | 31.3% net margin vs CTMX's 24.7% |
| Stability / Safety | VRTX | Beta 0.44 vs CTMX's 1.08 |
| Dividends | Tie | Neither pays a meaningful dividend |
| Momentum (1Y) | CTMX | +6.9% vs VRTX's +3.6% |
| Efficiency (ROA) | CTMX | 17.7% ROA vs VRTX's 14.8% |
Who Each Stock Is For
Income & stability
Growth exposure
Long-term compounding (10Y)
Sleep-well-at-night portfolio
Defensive / Recession hedge
Business Model
What each company does and how it makes money
CytomX Therapeutics is an oncology-focused biopharmaceutical company that develops conditionally activated antibody therapeutics using its proprietary Probody technology platform. It generates revenue primarily through strategic collaborations and licensing deals with major pharmaceutical partners — including AbbVie, Amgen, and Bristol-Myers Squibb — which provide upfront payments, milestone payments, and potential future royalties on any commercialized products. The company's key competitive advantage is its Probody platform technology, which creates conditionally activated therapeutics that remain inactive until they reach the tumor microenvironment, potentially improving safety and efficacy compared to traditional antibody therapies.
Vertex Pharmaceuticals is a biotechnology company focused on developing and commercializing transformative medicines for serious diseases, with its flagship franchise targeting cystic fibrosis. It generates nearly all its revenue from CF therapies — primarily Trikafta/Kaftrio — while building a pipeline in pain, kidney disease, and type 1 diabetes. Its moat stems from deep scientific expertise in CFTR biology and a dominant, near-monopoly position in the CF treatment market.
Revenue Breakdown by Segment
How each company's revenue is distributed across its business units
Segment breakdown not available.
Financial Metrics Comparison
Side-by-side fundamentals across 2 stocks. BestLagging
Financial Scorecard
CTMX leads in 3 of 6 categories (Valuation Metrics, Profitability & Efficiency). VRTX leads in 2 (Financial Metrics, Risk & Volatility).
Financial Metrics (TTM)
VRTX is the larger business by revenue, generating $11.7B annually — 103.2x CTMX's $114M. VRTX is the more profitable business, keeping 31.3% of every revenue dollar as net income compared to CTMX's 24.7%. On growth, VRTX holds the edge at +11.0% YoY revenue growth, suggesting stronger near-term business momentum.
| Metric | CTMXCytomX Therapeuti… | VRTXVertex Pharmaceut… |
|---|---|---|
| RevenueTrailing 12 months | $114M | $11.7B |
| EBITDAEarnings before interest/tax | $25M | $4.2B |
| Net IncomeAfter-tax profit | $28M | $3.7B |
| Free Cash FlowCash after capex | -$72M | $3.3B |
| Gross MarginGross profit ÷ Revenue | +100.0% | +86.3% |
| Operating MarginEBIT ÷ Revenue | +20.5% | +34.1% |
| Net MarginNet income ÷ Revenue | +24.7% | +31.3% |
| FCF MarginFCF ÷ Revenue | -63.7% | +28.5% |
| Rev. Growth (YoY)Latest quarter vs prior year | -82.2% | +11.0% |
| EPS Growth (YoY)Latest quarter vs prior year | -2.3% | +4.7% |
Valuation Metrics
At 14.1x trailing earnings, CTMX trades at a 56% valuation discount to VRTX's 32.4x P/E. On an enterprise value basis, CTMX's 15.0x EV/EBITDA is more attractive than VRTX's 26.6x.
| Metric | CTMXCytomX Therapeuti… | VRTXVertex Pharmaceut… |
|---|---|---|
| Market CapShares × price | $430M | $126.2B |
| Enterprise ValueMkt cap + debt − cash | $401M | $124.8B |
| Trailing P/EPrice ÷ TTM EPS | 14.13x | 32.43x |
| Forward P/EPrice ÷ next-FY EPS est. | — | 25.66x |
| PEG RatioP/E ÷ EPS growth rate | — | 3.91x |
| EV / EBITDAEnterprise value multiple | 15.00x | 26.63x |
| Price / SalesMarket cap ÷ Revenue | 3.11x | 10.52x |
| Price / BookPrice ÷ Book value/share | — | 6.87x |
| Price / FCFMarket cap ÷ FCF | — | 39.51x |
Profitability & Efficiency
CTMX delivers a 26.1% return on equity — every $100 of shareholder capital generates $26 in annual profit, vs $21 for VRTX. On the Piotroski fundamental quality scale (0–9), VRTX scores 5/9 vs CTMX's 4/9, reflecting solid financial health.
| Metric | CTMXCytomX Therapeuti… | VRTXVertex Pharmaceut… |
|---|---|---|
| ROE (TTM)Return on equity | +26.1% | +21.2% |
| ROA (TTM)Return on assets | +17.7% | +14.8% |
| ROICReturn on invested capital | — | +22.8% |
| ROCEReturn on capital employed | +62.0% | +23.0% |
| Piotroski ScoreFundamental quality 0–9 | 4 | 5 |
| Debt / EquityFinancial leverage | — | 0.20x |
| Net DebtTotal debt minus cash | -$29M | $3.7B |
| Cash & Equiv.Liquid assets | $38M | $5.1B |
| Total DebtShort + long-term debt | $9M | $3.7B |
| Interest CoverageEBIT ÷ Interest expense | — | 348.55x |
Total Returns (with DRIP)
A $10,000 investment in VRTX five years ago would be worth $23,616 today (with dividends reinvested), compared to $6,355 for CTMX. Over the past 12 months, CTMX leads with a +693.0% total return vs VRTX's +3.6%. The 3-year compound annual growth rate (CAGR) favors CTMX at 35.7% vs VRTX's 19.6% — a key indicator of consistent wealth creation.
| Metric | CTMXCytomX Therapeuti… | VRTXVertex Pharmaceut… |
|---|---|---|
| YTD ReturnYear-to-date | +26.4% | +9.9% |
| 1-Year ReturnPast 12 months | +693.0% | +3.6% |
| 3-Year ReturnCumulative with dividends | +149.8% | +71.1% |
| 5-Year ReturnCumulative with dividends | -36.4% | +136.2% |
| 10-Year ReturnCumulative with dividends | -58.4% | +481.2% |
| CAGR (3Y)Annualised 3-year return | +35.7% | +19.6% |
Risk & Volatility
VRTX is the less volatile stock with a 0.44 beta — it tends to amplify market swings less than CTMX's 1.08 beta. A beta below 1.0 means the stock typically moves less than the S&P 500. VRTX currently trades 95.6% from its 52-week high vs CTMX's 84.6% drawdown — a narrower gap to the peak suggests stronger recent price momentum.
| Metric | CTMXCytomX Therapeuti… | VRTXVertex Pharmaceut… |
|---|---|---|
| Beta (5Y)Sensitivity to S&P 500 | 1.08x | 0.44x |
| 52-Week HighHighest price in past year | $6.35 | $519.68 |
| 52-Week LowLowest price in past year | $0.40 | $362.50 |
| % of 52W HighCurrent price vs 52-week peak | +84.6% | +95.6% |
| RSI (14)Momentum oscillator 0–100 | 52.0 | 54.6 |
| Avg Volume (50D)Average daily shares traded | 2.6M | 1.2M |
Analyst Outlook
Wall Street rates CTMX as "Buy" and VRTX as "Buy". Consensus price targets imply 86.2% upside for CTMX (target: $10) vs 9.7% for VRTX (target: $545).
| Metric | CTMXCytomX Therapeuti… | VRTXVertex Pharmaceut… |
|---|---|---|
| Analyst RatingConsensus buy/hold/sell | Buy | Buy |
| Price TargetConsensus 12-month target | $10.00 | $545.08 |
| # AnalystsCovering analysts | 21 | 55 |
| Dividend YieldAnnual dividend ÷ price | — | — |
| Dividend StreakConsecutive years of raises | 1 | — |
| Dividend / ShareAnnual DPS | — | — |
| Buyback YieldShare repurchases ÷ mkt cap | 0.0% | +1.6% |
Historical Charts
Charts are rendered on first load. Hover for details.
Chart 1Total Return — 5 Years (Rebased to 100)
| Stock | Mar 20 | Feb 26 | Change |
|---|---|---|---|
| CytomX Therapeutics… (CTMX) | 100 | 85.71 | -14.3% |
| Vertex Pharmaceutic… (VRTX) | 100 | 203.2 | +103.2% |
Vertex Pharmaceutic… (VRTX) returned +136% over 5 years vs CytomX Therapeutics… (CTMX)'s -36%. A $10,000 investment in VRTX 5 years ago would be worth $23,616 today (including dividends reinvested).
Chart 2Revenue Growth — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| CytomX Therapeutics… (CTMX) | $15M | $138M | +818.1% |
| Vertex Pharmaceutic… (VRTX) | $1.7B | $12.0B | +605.1% |
Vertex Pharmaceuticals Incorporated's revenue grew from $1.7B (2016) to $12.0B (2025) — a 24.2% CAGR.
Chart 3Net Margin Trend — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| CytomX Therapeutics… (CTMX) | -3.9% | 23.1% | +689.4% |
| Vertex Pharmaceutic… (VRTX) | -6.6% | 32.9% | +600.4% |
Vertex Pharmaceuticals Incorporated's net margin went from -7% (2016) to 33% (2025).
Chart 4P/E Ratio History — 8 Years
| Stock | 2017 | 2025 | Change |
|---|---|---|---|
| Vertex Pharmaceutic… (VRTX) | 144.1 | 29.6 | -79.5% |
Vertex Pharmaceuticals Incorporated has traded in a 21x–144x P/E range over 8 years; current trailing P/E is ~32x.
Chart 5EPS Growth — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| CytomX Therapeutics… (CTMX) | -1.63 | 0.38 | +123.3% |
| Vertex Pharmaceutic… (VRTX) | -0.46 | 15.32 | +3430.4% |
Vertex Pharmaceuticals Incorporated's EPS grew from $-0.46 (2016) to $15.32 (2025).
Chart 6Free Cash Flow — 5 Years
CytomX Therapeutics, Inc. generated $-87M FCF in 2024 (+28% vs 2021). Vertex Pharmaceuticals Incorporated generated $3B FCF in 2025 (+33% vs 2021).
CTMX vs VRTX: Frequently Asked Questions
9 questions · data-driven answers · updated daily
01Is CTMX or VRTX a better buy right now?
CytomX Therapeutics, Inc. (CTMX) offers the better valuation at 14.1x trailing P/E, making it the more compelling value choice. Analysts rate CytomX Therapeutics, Inc. (CTMX) a "Buy" — based on 21 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.
02Which has the better valuation — CTMX or VRTX?
On trailing P/E, CytomX Therapeutics, Inc. (CTMX) is the cheapest at 14.1x versus Vertex Pharmaceuticals Incorporated at 32.4x.
03Which is the better long-term investment — CTMX or VRTX?
Over the past 5 years, Vertex Pharmaceuticals Incorporated (VRTX) delivered a total return of +136.2%, compared to -36.4% for CytomX Therapeutics, Inc. (CTMX). A $10,000 investment in VRTX five years ago would be worth approximately $24K today (assuming dividends reinvested). Over 10 years, the gap is even starker: VRTX returned +481.2% versus CTMX's -58.4%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.
04Which is safer — CTMX or VRTX?
By beta (market sensitivity over 5 years), Vertex Pharmaceuticals Incorporated (VRTX) is the lower-risk stock at 0.44β versus CytomX Therapeutics, Inc.'s 1.08β — meaning CTMX is approximately 144% more volatile than VRTX relative to the S&P 500.
05Which has better profit margins — CTMX or VRTX?
Vertex Pharmaceuticals Incorporated (VRTX) is the more profitable company, earning 32.9% net margin versus 23.1% for CytomX Therapeutics, Inc. — meaning it keeps 32.9% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: VRTX leads at 39.1% versus 18.1% for CTMX. At the gross margin level — before operating expenses — CTMX leads at 100.0%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.
06Is CTMX or VRTX more undervalued right now?
Analyst consensus price targets imply the most upside for CTMX: 86.2% to $10.00.
07Which pays a better dividend — CTMX or VRTX?
None of the stocks in this comparison currently pay a material dividend. All are effectively zero-yield and should be held for capital appreciation rather than income.
08Is CTMX or VRTX better for a retirement portfolio?
For long-horizon retirement investors, Vertex Pharmaceuticals Incorporated (VRTX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.44), +481.2% 10Y return). Both have compounded well over 10 years (VRTX: +481.2%, CTMX: -58.4%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.
09What are the main differences between CTMX and VRTX?
Both stocks operate in the Healthcare sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both. In terms of investment character: CTMX is a small-cap deep-value stock; VRTX is a mid-cap quality compounder stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.
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