Core Viewpoint - West Pharmaceutical Services reported Q4 results that exceeded analysts' expectations for revenue and earnings, but its future guidance fell short, leading to a significant decline in stock price [1][4]. Financial Performance - Q4 revenue reached 749million,a2.31.82 per share compared to 1.83intheprior−yearquarter[4].StockPerformance−WSTstockhasdropped432.89 billion and adjusted earnings of 6.10persharefor2025,whichisbelowmarketexpectationsof3.04 billion and 7.44,respectively[4].ValuationAnalysis−WSTstockiscurrentlytradingataround200, at a price-to-sales ratio of 5.1x, compared to its five-year average of 9.2x, indicating it may be undervalued despite lower profit margins and cautious guidance [7].