MCK vs ZSTK vs AMRX Stock Comparison

Mckesson, ZeroStack and Amneal Pharmaceuticals Prices as of Oct 28, 2026 Peers: Industry group
MCK Mckesson Corp
$960.80 +12.2% 1M +19.4% 1Y
Market cap
$112.02B
P/E
24.8x
Revenue (TTM)
$410.98B
Div. yield
0.35%
Drug Distribution Healthcare
6 wins
ZSTK ZeroStack Corp.
$3.04 -28.3% 1M -73.9% 1Y
Market cap
$30.28M
P/E
–
Revenue (TTM)
$40.03M
Div. yield
–
Drug Distribution Healthcare
2 wins

Head to Head

11 decided of 12

Mckesson leads on 6 of the 12 questions below (Mckesson 6, Amneal Pharmaceuticals 3, ZeroStack 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionMCKZSTKAMRXLeader
Larger companyMarket capitalisation $112.02B $30.28M $6.75B MCK
Cheaper on earningsLower P/E, profitable companies only 24.8x -0.2x 42.9x MCK
Cheaper on forward earningsLower price / next fiscal year consensus EPS 20.4x — 21.8x MCK
Faster revenue growthRevenue growth, trailing twelve months +8.8% +27.3% +9.3% ZSTK
More profitableNet margin, trailing twelve months 1.1% -444.3% 5.0% AMRX
Better return on capitalReturn on invested capital 107.9% -852.2% 17.4% MCK
Less leveragedLower net debt / EBITDA 0.6x 0.0x 3.8x ZSTK
Higher dividend yieldTrailing dividend yield 0.35% — — –
Better 1-year returnPrice return, last 12 months +19.4% -73.9% +105.4% AMRX
Better 5-year returnAnnualised price return, 5 years +35.8%/yr -75.4%/yr +31.0%/yr MCK
Less volatileAnnualised volatility, 1 year 30.7% 169.7% 35.1% MCK
Higher overall scoreMean of the five percentile scores vs peers 58/100 26/100 70/100 AMRX

Percentile Scorecard

MCKZSTKAMRX

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

AxisMCKZSTKAMRX
Valuation 50 #13 of 25 17 #21 of 25 91 #55 of 625
Growth 65 #9 of 24 44 #14 of 24 74 #157 of 602
Profitability 65 #9 of 24 9 #22 of 24 84 #88 of 549
Financial Health 48 #14 of 26 60 #11 of 26 12 #579 of 654
Shareholder Returns 60 #7 of 16 0 #16 of 16 87 #47 of 367
Overall 58 26 70
  • MCK ranked among 27 companies in Healthcare Payers and Distributors
  • ZSTK ranked among 27 companies in Healthcare Payers and Distributors
  • AMRX ranked among 672 companies in Pharmaceuticals and Biotechnology

Price Performance

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

Returns

PeriodMCKZSTKAMRXSPY
1 month +12.2%-28.3%+3.1% +0.9%
3 months +8.1%+102.7%+10.7% +5.9%
6 months +16.8%-51.0%+65.2% +8.5%
Year to date +17.1%-51.4%+67.8% +13.3%
1 year +19.4%-73.9%+105.4% +12.4%
3 years +114.4%-88.4%+460.7% +88.1%
3 years, per year +29.0%-51.2%+77.7% +23.5%
5 years +362.2%-99.9%+285.1% +68.2%
5 years, per year +35.8%-75.4%+31.0% +11.0%
10 years +674.2%—— +263.4%
10 years, per year +22.7%—— +13.8%

Risk

MeasureMCKZSTKAMRXSPY
Volatility, 1Y 30.7%169.7%35.1% 12.7%
Downside volatility, 1Y 27.4%132.9%30.9% 12.7%
Beta vs S&P 500, 1Y -0.271.670.70 1.00
Return / volatility, 1Y 0.63-0.443.01 0.98
Max drawdown, 5Y -27.2%-100.0%-78.2% -25.4%
From 52-week high -6.7%-74.2%-1.4% -0.9%
52-week high $1,030.18$11.80$21.44 $779.14
52-week low $725.17$1.37$10.00 $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.

MultipleMCKZSTKAMRX
P/E now vs peer median 24.8xmedian 23.9x -0.2xmedian 23.9x 42.9xmedian 17.4x
P/S now vs peer median 0.3xmedian 0.3x 0.8xmedian 0.3x 2.2xmedian 9.1x
EV/EBITDA now vs peer median 16.1xmedian 12.7x -0.1xmedian 12.7x 14.0xmedian 17.1x
P/FCF now vs peer median 17.5xmedian 15.4x -5.4xmedian 15.4x 81.2xmedian 19.0x
P/B now vs peer median -26.4xmedian 2.5x 2.2xmedian 2.5x 204.4xmedian 2.2x
PEG now vs peer median 2.08median 1.34 0.00median 1.34 0.18median 0.34

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 monthsMCKZSTKAMRX
Revenue $410.98B $40.03M $3.12B
Gross profit $14.96B $5.26M $1.23B
Operating income $6.50B -$239.39M $453.92M
Net income $5.30B -$177.88M $215.32M
Free cash flow $6.42B -$5.64M $83.11M
R&D – – $175.57M
EPS (diluted) $38.52 $-17.86 $0.48
Cash & equivalents $5.16B $2.64M $127.64M
Total debt $9.73B $2.41M $2.67B
Shares (diluted) 119.20M 9.96M 328.10M
Enterprise value $98.48B $6.97M $6.03B

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
MetricMCKZSTKAMRX
P/E 24.8x -0.2x 42.9x
P/FCF 17.5x -5.4x 81.2x
P/Operating cash flow 16.3x -5.4x 33.6x
P/S 0.3x 0.8x 2.2x
P/B -26.4x 2.2x 204.4x
P/Tangible book -13.6x 2.2x -12.2x
EV/EBITDA 16.1x -0.1x 14.0x
EV/EBIT 18.0x -0.1x 20.5x
EV/Revenue 0.3x 0.8x 3.0x
EV/FCF 18.2x -5.3x 111.8x
EV/Operating cash flow 17.0x -5.4x 46.3x
PEG (3Y EPS CAGR) 2.08 0.00 0.18

Growth

14 metrics
MetricMCKZSTKAMRX
Revenue growth (1Y) 8.8% 27.3% 9.3%
Revenue CAGR (3Y) 13.1% -13.1% 10.5%
Gross profit growth (1Y) 11.2% 171.8% 14.1%
Gross profit CAGR (3Y) 6.6% -32.4% 14.9%
Operating income growth (1Y) 46.6% -2,574% 20.6%
Operating income CAGR (3Y) 13.5% -57.0% 32.5%
Net income growth (1Y) 58.1% -1,263% 426.4%
Net income CAGR (3Y) 10.7% -37.3% 139.1%
EPS growth (1Y) 52.8% 24.9% 4,481%
EPS CAGR (3Y) 12.0% 64.4% 237.0%
Operating cash flow growth (1Y) 4.7% 37.6% -42.8%
Operating cash flow CAGR (3Y) 10.7% 23.9% 0.4%
Free cash flow growth (1Y) 6.8% 37.9% -69.3%
Free cash flow CAGR (3Y) 11.3% 25.2% -17.3%

Profitability

14 metrics
MetricMCKZSTKAMRX
Gross margin 3.6% 13.1% 39.3%
EBITDA margin 1.8% -597.5% 21.3%
Operating margin 1.6% -598.0% 14.6%
Pretax margin 1.6% -436.1% 6.5%
Net margin 1.1% -444.3% 5.0%
FCF margin 1.6% -14.1% 2.7%
Operating cash flow margin 1.7% -14.0% 6.4%
Return on equity – -702.9% –
Return on assets 6.2% -505.5% 5.9%
Return on invested capital 107.9% -852.2% 17.4%
Return on capital employed 43.4% -994.1% 16.4%
Asset turnover 4.8x 1.1x 0.9x
Cash conversion (OCF / net income) 1.3x 0.0x 0.9x
Stock comp / revenue – 13.1% 1.1%

Financial Health

11 metrics
MetricMCKZSTKAMRX
Debt / assets 11.0% 9.6% 70.7%
Debt / equity -2.3x 0.2x 80.9x
Net debt / EBITDA 0.6x 0.0x 3.8x
Debt / FCF 1.5x -0.4x 32.1x
Liabilities / assets 104.8% 45.1% 99.1%
Equity / assets -4.8% 54.9% 0.9%
Interest coverage 23.6x – –
Current ratio 0.9x 0.9x 2.2x
Quick ratio 0.5x 0.7x 1.3x
Cash ratio 0.1x 0.2x 0.1x
Altman Z-score 5.88 -47.05 2.49

Shareholder Returns

7 metrics
MetricMCKZSTKAMRX
Dividend yield 0.4% – –
Net buyback yield 5.9% -49.6% 0.0%
Shareholder yield 6.3% -49.6% 0.0%
Payout ratio (earnings) 7.4% – –
Payout ratio (FCF) 6.1% – –
Dividend growth (1Y) 11.3% – –
Dividend CAGR (3Y) 10.0% – –

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.

ConsensusMCKZSTKAMRX
Forward P/E 20.4xFY2026 – 21.8xFY2026
EPS, next fiscal year $47.15FY2026 $-4.29FY2026 $0.97FY2026
EPS growth, next FY +20.6%FY2026 – +16.9%FY2026
EPS growth, the year after +11.0% – +26.8%
Revenue, next fiscal year $444.47BFY2026 $31.29MFY2026 $3.24BFY2026
Revenue growth, next FY +10.2%FY2026 -12.3%FY2026 +7.4%FY2026
Revenue growth, the year after +1.5% -10.3% +12.4%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersMCKZSTKAMRX
Held by institutions 89.1% – 51.1%
Institutions holding 2,010 – 310
Change in shares held, QoQ -0.7% – +1.3%
Institutions buying 882 – 182
Institutions selling 791 – 86
Buyers to sellers 1.12 – 2.12

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.

MCKZSTKAMRX
MCK 1.00 -0.04 0.14
ZSTK -0.04 1.00 0.06
AMRX 0.14 0.06 1.00

Add a Peer

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Frequently Asked Questions

Which is bigger, MCK, ZSTK and AMRX?

Mckesson (MCK) is the largest by market capitalisation: Mckesson (MCK) $112.02B, ZeroStack (ZSTK) $30.28M, Amneal Pharmaceuticals (AMRX) $6.75B.

Which stock is cheaper, MCK, ZSTK and AMRX?

Mckesson (MCK) trades on the lowest price-to-earnings ratio (Mckesson (MCK) 24.8x, ZeroStack (ZSTK) -0.2x, Amneal Pharmaceuticals (AMRX) 42.9x). On next year's consensus earnings, Mckesson (MCK) is cheapest (Mckesson (MCK) 20.4x, Amneal Pharmaceuticals (AMRX) 21.8x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

ZeroStack (ZSTK) grew revenue fastest over the trailing twelve months: Mckesson (MCK) +8.8%, ZeroStack (ZSTK) +27.3%, Amneal Pharmaceuticals (AMRX) +9.3%.

Which company is more profitable?

Amneal Pharmaceuticals (AMRX) has the highest net margin (Mckesson (MCK) 1.1%, ZeroStack (ZSTK) -444.3%, Amneal Pharmaceuticals (AMRX) 5.0%). On return on invested capital, Mckesson (MCK) leads (Mckesson (MCK) 107.9%, ZeroStack (ZSTK) -852.2%, Amneal Pharmaceuticals (AMRX) 17.4%).

Which stock has performed better?

Over the past year Amneal Pharmaceuticals (AMRX) returned the most: Mckesson (MCK) +19.4%, ZeroStack (ZSTK) -73.9%, Amneal Pharmaceuticals (AMRX) +105.4%. Over five years, Mckesson (MCK) compounded fastest (Mckesson (MCK) +35.8%/yr, ZeroStack (ZSTK) -75.4%/yr, Amneal Pharmaceuticals (AMRX) +31.0%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Mckesson (MCK) 0.35%. ZeroStack (ZSTK) and Amneal Pharmaceuticals (AMRX) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Mckesson (MCK) has been the steadiest (Mckesson (MCK) 30.7%, ZeroStack (ZSTK) 169.7%, Amneal Pharmaceuticals (AMRX) 35.1%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, MCK, ZSTK and AMRX?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Mckesson (MCK) leads on 6. 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.