IDXX vs MRK vs PAHC Stock Comparison

Idexx Laboratories, Merck and Phibro Animal Health Prices as of Nov 5, 2026 Peers: Industry group
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MRK Merck & Co., Inc.
$146.90 +3.5% 1M +74.1% 1Y
Market cap
$362.64B
P/E
147.8x
Revenue (TTM)
$67.38B
Div. yield
0.02%
Pharmaceuticals Healthcare
5 wins

Head to Head

12 decided of 12

Merck leads on 5 of the 12 questions below (Merck 5, Idexx Laboratories 5, Phibro Animal Health 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionIDXXMRKPAHCLeader
Larger companyMarket capitalisation $53.33B $362.64B $1.34B MRK
Cheaper on earningsLower P/E, profitable companies only 45.1x 147.8x 13.1x PAHC
Cheaper on forward earningsLower price / next fiscal year consensus EPS 42.6x 56.5x 10.4x PAHC
Faster revenue growthRevenue growth, trailing twelve months +11.9% +4.9% +10.1% IDXX
More profitableNet margin, trailing twelve months 25.4% 3.6% 6.7% IDXX
Better return on capitalReturn on invested capital 45.4% 2.9% 13.9% IDXX
Less leveragedLower net debt / EBITDA 0.4x 3.4x 2.1x IDXX
Higher dividend yieldTrailing dividend yield 0.00% 0.02% 0.01% MRK
Better 1-year returnPrice return, last 12 months -6.9% +74.1% -14.0% MRK
Better 5-year returnAnnualised price return, 5 years +1.0%/yr +12.5%/yr +9.6%/yr MRK
Less volatileAnnualised volatility, 1 year 35.9% 30.0% 56.6% MRK
Higher overall scoreMean of the five percentile scores vs peers 76/100 61/100 70/100 IDXX

Percentile Scorecard

IDXXMRKPAHC

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisIDXXMRKPAHC
Valuation 74 #164 of 634 86 #90 of 634 94 #38 of 634
Growth 70 #182 of 608 29 #431 of 608 85 #90 of 608
Profitability 97 #16 of 557 90 #59 of 557 85 #86 of 557
Financial Health 47 #349 of 654 21 #519 of 654 27 #476 of 654
Shareholder Returns 92 #32 of 403 79 #87 of 403 57 #175 of 403
Overall 76 61 70
  • IDXX ranked among 671 companies in Pharmaceuticals and Biotechnology
  • MRK ranked among 671 companies in Pharmaceuticals and Biotechnology
  • PAHC ranked among 671 companies in Pharmaceuticals and Biotechnology

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodIDXXMRKPAHCSPY
1 month +30.1%+3.5%-3.3% -5.9%
3 months +13.7%+14.5%-0.3% -4.6%
6 months +17.2%+30.8%-18.0% +0.2%
Year to date -0.9%+39.6%-5.2% +7.5%
1 year -6.9%+74.1%-14.0% +8.2%
3 years +58.6%+40.8%+189.5% +68.3%
3 years, per year +16.6%+12.1%+42.5% +19.0%
5 years +5.2%+80.0%+58.2% +56.5%
5 years, per year +1.0%+12.5%+9.6% +9.4%
10 years +531.5%+149.7%+35.1% +251.5%
10 years, per year +20.2%+9.6%+3.1% +13.4%

Risk

MeasureIDXXMRKPAHCSPY
Volatility, 1Y 35.9%30.0%56.6% 13.6%
Downside volatility, 1Y 32.5%24.4%61.6% 14.2%
Beta vs S&P 500, 1Y 0.800.180.94 1.00
Return / volatility, 1Y -0.192.47-0.25 0.60
Max drawdown, 5Y -50.9%-44.7%-57.9% -25.4%
From 52-week high -12.5%-6.1%-40.6% -5.9%
52-week high $766.68$156.45$59.58 $779.14
52-week low $504.70$84.39$28.52 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleIDXXMRKPAHC
P/E now vs peer median 44.7xmedian 17.8x 147.8xmedian 17.8x 14.0xmedian 17.8x
P/S now vs peer median 11.3xmedian 8.1x 5.4xmedian 8.1x 0.9xmedian 8.1x
EV/EBITDA now vs peer median 32.1xmedian 15.7x 31.7xmedian 15.7x 7.7xmedian 15.7x
P/FCF now vs peer median 40.5xmedian 21.0x 24.6xmedian 21.0x 66.3xmedian 21.0x
P/B now vs peer median 28.3xmedian 2.0x 8.1xmedian 2.0x 3.4xmedian 2.0x
PEG now vs peer median 2.95median 0.36 -8.11median 0.36 0.20median 0.36

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsIDXXMRKPAHC
Revenue $4.66B $67.38B $1.54B
Gross profit $2.92B $48.35B $521.27M
Operating income $1.51B $5.46B $192.78M
Net income $1.18B $2.45B $102.71M
Free cash flow $1.30B $14.75B $21.67M
R&D $266.87M $30.76B –
EPS (diluted) $14.96 $0.99 $2.51
Cash & equivalents $197.54M $9.55B $75.55M
Total debt $848.88M $53.78B $610.88M
Shares (diluted) 79.05M 2.48B 40.96M
Enterprise value $52.56B $325.58B $1.02B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricIDXXMRKPAHC
P/E 44.7x 147.8x 14.0x
P/FCF 40.5x 24.6x 66.3x
P/Operating cash flow 37.2x 19.4x 16.8x
P/S 11.3x 5.4x 0.9x
P/B 28.3x 8.1x 3.4x
P/Tangible book 30.2x 17.7x 3.7x
EV/EBITDA 32.1x 31.7x 7.7x
EV/EBIT 35.5x 74.4x 10.2x
EV/Revenue 11.5x 6.0x 1.3x
EV/FCF 41.0x 27.6x 90.7x
EV/Operating cash flow 37.7x 21.7x 22.9x
PEG (3Y EPS CAGR) 2.95 -8.11 0.20

Growth

14 metrics
MetricIDXXMRKPAHC
Revenue growth (1Y) 11.9% 4.9% 10.1%
Revenue CAGR (3Y) 9.1% 4.3% 16.4%
Gross profit growth (1Y) 13.7% -2.5% 19.5%
Gross profit CAGR (3Y) 10.8% 3.8% 20.6%
Operating income growth (1Y) 15.3% -74.8% 33.8%
Operating income CAGR (3Y) 11.8% -11.1% 49.7%
Net income growth (1Y) 15.1% -87.1% 51.5%
Net income CAGR (3Y) 12.8% -19.1% 70.5%
EPS growth (1Y) 17.4% -87.0% 51.2%
EPS CAGR (3Y) 15.1% -18.2% 69.8%
Operating cash flow growth (1Y) 30.4% 9.6% 11.6%
Operating cash flow CAGR (3Y) 19.6% 2.9% 28.7%
Free cash flow growth (1Y) 35.3% 13.0% -36.8%
Free cash flow CAGR (3Y) 24.2% 3.8% 74.0%

Profitability

14 metrics
MetricIDXXMRKPAHC
Gross margin 62.7% 71.8% 33.8%
EBITDA margin 35.7% 19.0% 16.5%
Operating margin 32.3% 8.1% 12.5%
Pretax margin 31.7% 7.1% 9.1%
Net margin 25.4% 3.6% 6.7%
FCF margin 28.0% 21.9% 1.4%
Operating cash flow margin 30.4% 27.8% 5.6%
Return on equity 67.9% 5.6% 25.6%
Return on assets 33.1% 1.9% 6.8%
Return on invested capital 45.4% 2.9% 13.9%
Return on capital employed 65.2% 5.3% 15.9%
Asset turnover 1.3x 0.5x 1.0x
Cash conversion (OCF / net income) 1.2x 7.6x 0.8x
Stock comp / revenue 1.4% 1.6% 0.1%

Financial Health

11 metrics
MetricIDXXMRKPAHC
Debt / assets 22.9% 40.5% 40.3%
Debt / equity 0.5x 1.2x 1.5x
Net debt / EBITDA 0.4x 3.4x 2.1x
Debt / FCF 0.7x 3.6x 28.2x
Liabilities / assets 49.6% 66.1% 72.4%
Equity / assets 50.4% 33.9% 27.6%
Interest coverage 43.5x – 4.2x
Current ratio 1.2x 1.4x 3.2x
Quick ratio 0.7x 0.8x 1.0x
Cash ratio 0.2x 0.3x 0.3x
Altman Z-score 22.69 3.91 3.09

Shareholder Returns

7 metrics
MetricIDXXMRKPAHC
Dividend yield – 2.3% 1.4%
Net buyback yield 1.8% 0.8% –
Shareholder yield 1.8% 3.2% 1.4%
Payout ratio (earnings) – 341.6% 19.0%
Payout ratio (FCF) – 56.7% 89.9%
Dividend growth (1Y) – 3.2% 0.1%
Dividend CAGR (3Y) – 4.4% 0.0%

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusIDXXMRKPAHC
Forward P/E 42.6xFY2026 56.5xFY2026 10.4xFY2027
EPS, next fiscal year $15.74FY2026 $2.60FY2026 $3.42FY2027
EPS growth, next FY +20.3%FY2026 -71.0%FY2026 +6.2%FY2027
EPS growth, the year after +12.5% +231.2% +9.6%
Revenue, next fiscal year $5.02BFY2026 $69.61BFY2026 $1.53BFY2027
Revenue growth, next FY +16.8%FY2026 +7.1%FY2026 +0.6%FY2027
Revenue growth, the year after +0.6% -4.5% -0.2%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersIDXXMRKPAHC
Held by institutions 93.6% 79.9% 99.1%
Institutions holding 1,291 3,803 210
Change in shares held, QoQ +4.1% +2.6% +3.0%
Institutions buying 589 1,843 117
Institutions selling 496 1,469 75
Buyers to sellers 1.19 1.25 1.56

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

IDXXMRKPAHC
IDXX 1.00 0.14 0.29
MRK 0.14 1.00 0.25
PAHC 0.29 0.25 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, IDXX, MRK and PAHC?

Merck (MRK) is the largest by market capitalisation: Idexx Laboratories (IDXX) $53.33B, Merck (MRK) $362.64B, Phibro Animal Health (PAHC) $1.34B.

Which stock is cheaper, IDXX, MRK and PAHC?

Phibro Animal Health (PAHC) trades on the lowest price-to-earnings ratio (Idexx Laboratories (IDXX) 45.1x, Merck (MRK) 147.8x, Phibro Animal Health (PAHC) 13.1x). On next year's consensus earnings, Phibro Animal Health (PAHC) is cheapest (Idexx Laboratories (IDXX) 42.6x, Merck (MRK) 56.5x, Phibro Animal Health (PAHC) 10.4x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Idexx Laboratories (IDXX) grew revenue fastest over the trailing twelve months: Idexx Laboratories (IDXX) +11.9%, Merck (MRK) +4.9%, Phibro Animal Health (PAHC) +10.1%.

Which company is more profitable?

Idexx Laboratories (IDXX) has the highest net margin (Idexx Laboratories (IDXX) 25.4%, Merck (MRK) 3.6%, Phibro Animal Health (PAHC) 6.7%). On return on invested capital, Idexx Laboratories (IDXX) leads (Idexx Laboratories (IDXX) 45.4%, Merck (MRK) 2.9%, Phibro Animal Health (PAHC) 13.9%).

Which stock has performed better?

Over the past year Merck (MRK) returned the most: Idexx Laboratories (IDXX) -6.9%, Merck (MRK) +74.1%, Phibro Animal Health (PAHC) -14.0%. Over five years, Merck (MRK) compounded fastest (Idexx Laboratories (IDXX) +1.0%/yr, Merck (MRK) +12.5%/yr, Phibro Animal Health (PAHC) +9.6%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Merck (MRK) has the highest dividend yield: Idexx Laboratories (IDXX) 0.00%, Merck (MRK) 0.02%, Phibro Animal Health (PAHC) 0.01%. Idexx Laboratories (IDXX) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Merck (MRK) has been the steadiest (Idexx Laboratories (IDXX) 35.9%, Merck (MRK) 30.0%, Phibro Animal Health (PAHC) 56.6%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, IDXX, MRK and PAHC?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Merck (MRK) leads on 5. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.