NAII vs WST vs ZTS Stock Comparison

Natural Alternatives International, West Pharmaceutical Services and Zoetis Prices as of Nov 3, 2026 Peers: Industry group
ZTS Zoetis Inc.
$82.97 +19.1% 1M -42.5% 1Y
Market cap
$36.48B
P/E
13.9x
Revenue (TTM)
$9.52B
Div. yield
0.02%
Animal Health Healthcare
7 wins

Head to Head

12 decided of 12

Zoetis leads on 7 of the 12 questions below (Zoetis 7, West Pharmaceutical Services 4, Natural Alternatives International 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionNAIIWSTZTSLeader
Larger companyMarket capitalisation $6.45M $28.71B $36.48B ZTS
Cheaper on earningsLower P/E, profitable companies only -0.3x 44.9x 13.9x ZTS
Cheaper on forward earningsLower price / next fiscal year consensus EPS — 42.6x 14.2x ZTS
Faster revenue growthRevenue growth, trailing twelve months +9.7% +12.6% +1.5% WST
More profitableNet margin, trailing twelve months -14.5% 18.8% 27.5% ZTS
Better return on capitalReturn on invested capital -24.9% 19.3% 23.4% ZTS
Less leveragedLower net debt / EBITDA -0.8x -0.3x 1.8x NAII
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.02% ZTS
Better 1-year returnPrice return, last 12 months -61.2% +45.5% -42.5% WST
Better 5-year returnAnnualised price return, 5 years -39.4%/yr -1.2%/yr -17.6%/yr WST
Less volatileAnnualised volatility, 1 year 67.9% 31.2% 40.9% WST
Higher overall scoreMean of the five percentile scores vs peers 35/100 69/100 71/100 ZTS

Percentile Scorecard

NAIIWSTZTS

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

AxisNAIIWSTZTS
Valuation 40 #7 of 11 49 #117 of 229 87 #82 of 634
Growth 0 #11 of 11 49 #113 of 221 51 #299 of 607
Profitability 40 #7 of 11 93 #15 of 209 96 #24 of 557
Financial Health 58 #6 of 13 80 #49 of 240 34 #431 of 654
Shareholder Returns – 75 #37 of 147 89 #46 of 401
Overall 35 69 71
  • NAII ranked among 13 companies in Pharma Services
  • WST ranked among 248 companies in Medical Devices and Diagnostics
  • ZTS 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

PeriodNAIIWSTZTSSPY
1 month -28.4%+11.6%+19.1% -2.0%
3 months -54.3%+16.7%+9.2% -2.2%
6 months -59.4%+31.4%-26.3% +4.2%
Year to date -70.4%+48.0%-34.1% +10.6%
1 year -61.2%+45.5%-42.5% +10.4%
3 years -82.7%+21.5%-48.9% +73.6%
3 years, per year -44.3%+6.7%-20.0% +20.2%
5 years -91.8%-6.0%-61.9% +61.6%
5 years, per year -39.4%-1.2%-17.6% +10.1%
10 years -90.9%+445.4%+69.5% +261.3%
10 years, per year -21.4%+18.5%+5.4% +13.7%

Risk

MeasureNAIIWSTZTSSPY
Volatility, 1Y 67.9%31.2%40.9% 12.8%
Downside volatility, 1Y 76.7%30.6%49.4% 12.8%
Beta vs S&P 500, 1Y 0.870.600.48 1.00
Return / volatility, 1Y -0.901.46-1.04 0.81
Max drawdown, 5Y -92.7%-59.6%-72.0% -25.4%
From 52-week high -78.1%-2.1%-42.5% -3.2%
52-week high $4.83$415.75$144.35 $779.14
52-week low $1.06$230.95$69.12 $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.

MultipleNAIIWSTZTS
P/E now vs peer median -0.3xmedian 35.6x 44.9xmedian 28.1x 13.2xmedian 18.4x
P/S now vs peer median 0.0xmedian 2.5x 8.4xmedian 2.9x 3.6xmedian 9.0x
EV/EBITDA now vs peer median -1.3xmedian 29.7x 29.2xmedian 18.0x 10.3xmedian 16.0x
P/FCF now vs peer median -0.5xmedian 20.8x 62.7xmedian 24.8x 14.8xmedian 21.8x
P/B now vs peer median 0.1xmedian 2.8x 9.6xmedian 2.3x 10.9xmedian 2.1x
PEG now vs peer median 0.00median 1.97 6.70median 0.95 1.41median 0.37

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 monthsNAIIWSTZTS
Revenue $142.52M $3.40B $9.52B
Gross profit $9.00M $1.28B $6.81B
Operating income -$18.75M $780.20M $3.59B
Net income -$20.70M $638.90M $2.62B
Free cash flow -$12.62M $453.40M $2.32B
R&D – $75.60M $722.00M
EPS (diluted) $-3.43 $9.02 $6.26
Cash & equivalents $7.39M $464.10M $1.48B
Total debt $18.69M $202.90M $9.05B
Shares (diluted) 6.03M 70.80M 417.70M
Enterprise value -$21.63M $26.49B $28.32B

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
MetricNAIIWSTZTS
P/E -0.3x 44.9x 13.2x
P/FCF -0.5x 62.7x 14.8x
P/Operating cash flow -0.7x 43.4x 12.1x
P/S 0.0x 8.4x 3.6x
P/B 0.1x 9.6x 10.9x
P/Tangible book 0.1x 9.6x 15.4x
EV/EBITDA -1.3x 29.2x 10.3x
EV/EBIT -0.9x 36.1x 11.6x
EV/Revenue 0.1x 8.3x 4.4x
EV/FCF -1.4x 62.1x 18.0x
EV/Operating cash flow -2.0x 43.0x 14.7x
PEG (3Y EPS CAGR) 0.00 6.70 1.41

Growth

14 metrics
MetricNAIIWSTZTS
Revenue growth (1Y) 9.7% 12.6% 1.5%
Revenue CAGR (3Y) -2.6% 5.1% 5.0%
Gross profit growth (1Y) -3.1% 18.9% 1.8%
Gross profit CAGR (3Y) -20.9% 4.7% 5.7%
Operating income growth (1Y) -116.5% 32.7% -0.1%
Operating income CAGR (3Y) -81.5% 6.6% 5.2%
Net income growth (1Y) -52.4% 29.9% 0.6%
Net income CAGR (3Y) -116.9% 4.5% 5.7%
EPS growth (1Y) -50.4% 33.2% 7.7%
EPS CAGR (3Y) -115.5% 6.7% 9.4%
Operating cash flow growth (1Y) -250.3% -5.7% -4.6%
Operating cash flow CAGR (3Y) -48.4% -5.2% 12.4%
Free cash flow growth (1Y) -644.3% 19.6% 2.1%
Free cash flow CAGR (3Y) -24.7% 2.6% 21.7%

Profitability

14 metrics
MetricNAIIWSTZTS
Gross margin 6.3% 37.6% 71.5%
EBITDA margin -9.9% 28.4% 42.8%
Operating margin -13.2% 23.0% 37.7%
Pretax margin -14.2% 23.2% 34.4%
Net margin -14.5% 18.8% 27.5%
FCF margin -8.9% 13.3% 24.3%
Operating cash flow margin -6.3% 19.3% 29.8%
Return on equity -36.6% 20.9% 82.0%
Return on assets -14.7% 15.3% 17.3%
Return on invested capital -24.9% 19.3% 23.4%
Return on capital employed -18.2% 22.8% 27.5%
Asset turnover 1.0x 0.8x 0.6x
Cash conversion (OCF / net income) 0.4x 1.0x 1.1x
Stock comp / revenue 0.5% 0.8% 1.0%

Financial Health

11 metrics
MetricNAIIWSTZTS
Debt / assets 14.8% 5.0% 60.0%
Debt / equity 0.4x 0.1x 2.9x
Net debt / EBITDA -0.8x -0.3x 1.8x
Debt / FCF -1.5x 0.4x 3.9x
Liabilities / assets 60.5% 26.9% 79.1%
Equity / assets 39.5% 73.1% 20.9%
Interest coverage – 96.3x 15.1x
Current ratio 1.7x 2.8x 3.1x
Quick ratio 0.5x 1.9x 1.6x
Cash ratio 0.2x 0.7x 0.8x
Altman Z-score 1.38 19.09 4.85

Shareholder Returns

7 metrics
MetricNAIIWSTZTS
Dividend yield – 0.2% 2.6%
Net buyback yield 1.4% 2.3% 10.6%
Shareholder yield 1.4% 2.5% 13.2%
Payout ratio (earnings) – 9.8% 34.0%
Payout ratio (FCF) – 13.9% 38.4%
Dividend growth (1Y) – 3.5% 6.1%
Dividend CAGR (3Y) – 3.7% 10.9%

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.

ConsensusNAIIWSTZTS
Forward P/E – 42.6xFY2026 14.2xFY2026
EPS, next fiscal year – $9.56FY2026 $5.86FY2026
EPS growth, next FY – +31.1%FY2026 -8.6%FY2026
EPS growth, the year after – +10.6% +13.0%
Revenue, next fiscal year – $3.24BFY2026 $9.57BFY2026
Revenue growth, next FY – +5.6%FY2026 +1.0%FY2026
Revenue growth, the year after – +16.8% -7.9%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersNAIIWSTZTS
Held by institutions 10.5% 99.5% 94.7%
Institutions holding 24 836 1,419
Change in shares held, QoQ +6.0% -0.9% -2.6%
Institutions buying 8 451 675
Institutions selling 7 261 583
Buyers to sellers 1.14 1.73 1.16

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.

NAIIWSTZTS
NAII 1.00 0.10 0.05
WST 0.10 1.00 0.08
ZTS 0.05 0.08 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, NAII, WST and ZTS?

Zoetis (ZTS) is the largest by market capitalisation: Natural Alternatives International (NAII) $6.45M, West Pharmaceutical Services (WST) $28.71B, Zoetis (ZTS) $36.48B.

Which stock is cheaper, NAII, WST and ZTS?

Zoetis (ZTS) trades on the lowest price-to-earnings ratio (Natural Alternatives International (NAII) -0.3x, West Pharmaceutical Services (WST) 44.9x, Zoetis (ZTS) 13.9x). On next year's consensus earnings, Zoetis (ZTS) is cheapest (West Pharmaceutical Services (WST) 42.6x, Zoetis (ZTS) 14.2x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

West Pharmaceutical Services (WST) grew revenue fastest over the trailing twelve months: Natural Alternatives International (NAII) +9.7%, West Pharmaceutical Services (WST) +12.6%, Zoetis (ZTS) +1.5%.

Which company is more profitable?

Zoetis (ZTS) has the highest net margin (Natural Alternatives International (NAII) -14.5%, West Pharmaceutical Services (WST) 18.8%, Zoetis (ZTS) 27.5%). On return on invested capital, Zoetis (ZTS) leads (Natural Alternatives International (NAII) -24.9%, West Pharmaceutical Services (WST) 19.3%, Zoetis (ZTS) 23.4%).

Which stock has performed better?

Over the past year West Pharmaceutical Services (WST) returned the most: Natural Alternatives International (NAII) -61.2%, West Pharmaceutical Services (WST) +45.5%, Zoetis (ZTS) -42.5%. Over five years, West Pharmaceutical Services (WST) compounded fastest (Natural Alternatives International (NAII) -39.4%/yr, West Pharmaceutical Services (WST) -1.2%/yr, Zoetis (ZTS) -17.6%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Zoetis (ZTS) has the highest dividend yield: Natural Alternatives International (NAII) 0.00%, West Pharmaceutical Services (WST) 0.00%, Zoetis (ZTS) 0.02%. Natural Alternatives International (NAII) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, West Pharmaceutical Services (WST) has been the steadiest (Natural Alternatives International (NAII) 67.9%, West Pharmaceutical Services (WST) 31.2%, Zoetis (ZTS) 40.9%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, NAII, WST and ZTS?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Zoetis (ZTS) leads on 7. 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.