Comprehensive Stock Comparison
Compare Mirum Pharmaceuticals, Inc. (MIRM) vs BridgeBio Pharma, Inc. (BBIO) 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 | BBIO | 126.3% revenue growth vs MIRM's 54.7% |
| Quality / Margins | MIRM | -4.5% net margin vs BBIO's -145.3% |
| Stability / Safety | MIRM | Beta 0.71 vs BBIO's 1.04 |
| Dividends | Tie | Neither pays a meaningful dividend |
| Momentum (1Y) | MIRM | +94.0% vs BBIO's +90.5% |
| Efficiency (ROA) | MIRM | -2.8% ROA vs BBIO's -77.9% |
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
Mirum Pharmaceuticals is a biopharmaceutical company that develops and commercializes novel therapies for rare liver diseases. It generates revenue primarily from sales of its FDA-approved drug LIVMARLI — which treats progressive familial intrahepatic cholestasis and Alagille syndrome — with additional income from licensing and collaboration agreements. The company's moat lies in its specialized expertise in rare hepatology and its first-to-market advantage with LIVMARLI, which addresses conditions with limited treatment options.
BridgeBio Pharma is a biopharmaceutical company focused on discovering and developing precision medicines for genetic diseases. It generates revenue primarily through drug development partnerships and potential future product sales — though currently in pre-revenue stage with multiple programs in clinical trials. The company's key advantage is its efficient hub-and-spoke operating model that allows rapid development of targeted therapies for rare genetic conditions.
Revenue Breakdown by Segment
How each company's revenue is distributed across its business units
Financial Metrics Comparison
Side-by-side fundamentals across 2 stocks. BestLagging
Financial Scorecard
MIRM leads in 5 of 6 categories — strongest in Financial Metrics and Valuation Metrics.
Financial Metrics (TTM)
MIRM and BBIO operate at a comparable scale, with $521M and $502M in trailing revenue. MIRM is the more profitable business, keeping -4.5% of every revenue dollar as net income compared to BBIO's -145.3%. On growth, BBIO holds the edge at +25.2% YoY revenue growth, suggesting stronger near-term business momentum.
| Metric | MIRMMirum Pharmaceuti… | BBIOBridgeBio Pharma,… |
|---|---|---|
| RevenueTrailing 12 months | $521M | $502M |
| EBITDAEarnings before interest/tax | $14M | -$560M |
| Net IncomeAfter-tax profit | -$23M | -$729M |
| Free Cash FlowCash after capex | $55M | -$458M |
| Gross MarginGross profit ÷ Revenue | +94.6% | +94.4% |
| Operating MarginEBIT ÷ Revenue | -4.2% | -113.3% |
| Net MarginNet income ÷ Revenue | -4.5% | -145.3% |
| FCF MarginFCF ÷ Revenue | +10.5% | -91.1% |
| Rev. Growth (YoY)Latest quarter vs prior year | +49.8% | +25.2% |
| EPS Growth (YoY)Latest quarter vs prior year | +75.5% | +28.6% |
Valuation Metrics
| Metric | MIRMMirum Pharmaceuti… | BBIOBridgeBio Pharma,… |
|---|---|---|
| Market CapShares × price | $4.8B | $12.9B |
| Enterprise ValueMkt cap + debt − cash | $4.8B | $12.4B |
| Trailing P/EPrice ÷ TTM EPS | -196.36x | -17.54x |
| Forward P/EPrice ÷ next-FY EPS est. | — | — |
| PEG RatioP/E ÷ EPS growth rate | — | — |
| EV / EBITDAEnterprise value multiple | — | — |
| Price / SalesMarket cap ÷ Revenue | 9.19x | 25.79x |
| Price / BookPrice ÷ Book value/share | 14.72x | — |
| Price / FCFMarket cap ÷ FCF | 87.28x | — |
Profitability & Efficiency
On the Piotroski fundamental quality scale (0–9), MIRM scores 6/9 vs BBIO's 3/9, reflecting solid financial health.
| Metric | MIRMMirum Pharmaceuti… | BBIOBridgeBio Pharma,… |
|---|---|---|
| ROE (TTM)Return on equity | -7.4% | — |
| ROA (TTM)Return on assets | -2.8% | -77.9% |
| ROICReturn on invested capital | -5.1% | — |
| ROCEReturn on capital employed | -3.7% | -80.6% |
| Piotroski ScoreFundamental quality 0–9 | 6 | 3 |
| Debt / EquityFinancial leverage | 1.01x | — |
| Net DebtTotal debt minus cash | $21M | -$560M |
| Cash & Equiv.Liquid assets | $297M | $570M |
| Total DebtShort + long-term debt | $317M | $10M |
| Interest CoverageEBIT ÷ Interest expense | -0.31x | -6.10x |
Total Returns (with DRIP)
A $10,000 investment in MIRM five years ago would be worth $49,940 today (with dividends reinvested), compared to $9,245 for BBIO. Over the past 12 months, MIRM leads with a +94.0% total return vs BBIO's +90.5%. The 3-year compound annual growth rate (CAGR) favors BBIO at 79.9% vs MIRM's 57.7% — a key indicator of consistent wealth creation.
| Metric | MIRMMirum Pharmaceuti… | BBIOBridgeBio Pharma,… |
|---|---|---|
| YTD ReturnYear-to-date | +18.2% | -15.0% |
| 1-Year ReturnPast 12 months | +94.0% | +90.5% |
| 3-Year ReturnCumulative with dividends | +292.6% | +482.1% |
| 5-Year ReturnCumulative with dividends | +399.4% | -7.6% |
| 10-Year ReturnCumulative with dividends | +598.6% | +141.3% |
| CAGR (3Y)Annualised 3-year return | +57.7% | +79.9% |
Risk & Volatility
MIRM is the less volatile stock with a 0.71 beta — it tends to amplify market swings less than BBIO's 1.04 beta. A beta below 1.0 means the stock typically moves less than the S&P 500. MIRM currently trades 84.5% from its 52-week high vs BBIO's 78.3% drawdown — a narrower gap to the peak suggests stronger recent price momentum.
| Metric | MIRMMirum Pharmaceuti… | BBIOBridgeBio Pharma,… |
|---|---|---|
| Beta (5Y)Sensitivity to S&P 500 | 0.71x | 1.04x |
| 52-Week HighHighest price in past year | $109.28 | $84.94 |
| 52-Week LowLowest price in past year | $36.88 | $28.33 |
| % of 52W HighCurrent price vs 52-week peak | +84.5% | +78.3% |
| RSI (14)Momentum oscillator 0–100 | 38.4 | 39.0 |
| Avg Volume (50D)Average daily shares traded | 623K | 2.5M |
Analyst Outlook
Wall Street rates MIRM as "Buy" and BBIO as "Buy". Consensus price targets imply 48.8% upside for BBIO (target: $99) vs 23.7% for MIRM (target: $114).
| Metric | MIRMMirum Pharmaceuti… | BBIOBridgeBio Pharma,… |
|---|---|---|
| Analyst RatingConsensus buy/hold/sell | Buy | Buy |
| Price TargetConsensus 12-month target | $114.20 | $98.92 |
| # AnalystsCovering analysts | 18 | 26 |
| Dividend YieldAnnual dividend ÷ price | — | — |
| Dividend StreakConsecutive years of raises | — | 0 |
| Dividend / ShareAnnual DPS | — | — |
| Buyback YieldShare repurchases ÷ mkt cap | 0.0% | +0.4% |
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 |
|---|---|---|---|
| Mirum Pharmaceutica… (MIRM) | 100 | 632.54 | +532.5% |
| BridgeBio Pharma, I… (BBIO) | 100 | 242.91 | +142.9% |
Mirum Pharmaceutica… (MIRM) returned +399% over 5 years vs BridgeBio Pharma, I… (BBIO)'s -8%. A $10,000 investment in MIRM 5 years ago would be worth $49,940 today (including dividends reinvested).
Chart 2Revenue Growth — 10 Years
| Stock | 2017 | 2025 | Change |
|---|---|---|---|
| Mirum Pharmaceutica… (MIRM) | $0.00 | $521M | — |
| BridgeBio Pharma, I… (BBIO) | $0.00 | $502M | — |
BridgeBio Pharma, Inc.'s revenue grew from $0M (2017) to $502M (2025) — a 0.0% CAGR.
Chart 3Net Margin Trend — 10 Years
| Stock | 2019 | 2025 | Change |
|---|---|---|---|
| Mirum Pharmaceutica… (MIRM) | -4.4% | -4.5% | -2.1% |
| BridgeBio Pharma, I… (BBIO) | -6.4% | -145.3% | -2162.2% |
BridgeBio Pharma, Inc.'s net margin went from -6% (2019) to -145% (2025).
Chart 4EPS Growth — 10 Years
| Stock | 2017 | 2025 | Change |
|---|---|---|---|
| Mirum Pharmaceutica… (MIRM) | -0.75 | -0.47 | +37.3% |
| BridgeBio Pharma, I… (BBIO) | -0.33 | -3.79 | -1048.5% |
BridgeBio Pharma, Inc.'s EPS grew from $-0.33 (2017) to $-3.79 (2025).
Chart 5Free Cash Flow — 5 Years
Mirum Pharmaceuticals, Inc. generated $55M FCF in 2025 (+136% vs 2021). BridgeBio Pharma, Inc. generated $-447M FCF in 2025 (+18% vs 2021).
MIRM vs BBIO: Frequently Asked Questions
7 questions · data-driven answers · updated daily
01Is MIRM or BBIO a better buy right now?
Analysts rate Mirum Pharmaceuticals, Inc. (MIRM) a "Buy" — based on 18 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 is the better long-term investment — MIRM or BBIO?
Over the past 5 years, Mirum Pharmaceuticals, Inc. (MIRM) delivered a total return of +399.4%, compared to -7.6% for BridgeBio Pharma, Inc. (BBIO). A $10,000 investment in MIRM five years ago would be worth approximately $50K today (assuming dividends reinvested). Over 10 years, the gap is even starker: MIRM returned +598.6% versus BBIO's +141.3%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.
03Which is safer — MIRM or BBIO?
By beta (market sensitivity over 5 years), Mirum Pharmaceuticals, Inc. (MIRM) is the lower-risk stock at 0.71β versus BridgeBio Pharma, Inc.'s 1.04β — meaning BBIO is approximately 46% more volatile than MIRM relative to the S&P 500.
04Which has better profit margins — MIRM or BBIO?
Mirum Pharmaceuticals, Inc. (MIRM) is the more profitable company, earning -4.5% net margin versus -145.3% for BridgeBio Pharma, Inc. — meaning it keeps -4.5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: MIRM leads at -4.2% versus -113.3% for BBIO. At the gross margin level — before operating expenses — BBIO leads at 94.4%, 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.
05Which pays a better dividend — MIRM or BBIO?
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.
06Is MIRM or BBIO better for a retirement portfolio?
For long-horizon retirement investors, Mirum Pharmaceuticals, Inc. (MIRM) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.71), +598.6% 10Y return). Both have compounded well over 10 years (MIRM: +598.6%, BBIO: +141.3%), 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.
07What are the main differences between MIRM and BBIO?
Both stocks operate in the Healthcare sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both. 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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