P/E Ratio for West Pharmaceutical Services (WST)

West Pharmaceutical Services (WST) P/E ratio is 42.0× as of June 5, 2026. The 5-year average is 42.7×. The sector median currently stands at 25.0×. The current ratio is at the 46th percentile of its own 10-year history.

West Pharmaceutical Services (WST) historical P/E ratio has ranged from a low of 14.3× (2009) to a high of 72.5× (2021) in the available daily series.

The price-to-earnings (P/E) ratio, also called the earnings multiple, measures how much investors pay per dollar of a company's trailing twelve-month (TTM) earnings. It is calculated as share price ÷ TTM diluted EPS (equivalent to market capitalisation ÷ TTM net income). A higher P/E implies the market is pricing in stronger future earnings growth or lower risk; a lower P/E can signal slower expected growth, higher risk, or potential undervaluation.