Allegion PLC (ALLE) shares plummeted 5.32% in intraday trading on Thursday, despite the company reporting better-than-expected third-quarter results and raising its full-year earnings outlook. The sharp decline suggests investors are focusing on potential headwinds rather than the company's current performance.

The security products manufacturer reported Q3 adjusted earnings of $2.30 per share, surpassing analysts' expectations of $2.21. Revenue for the quarter also beat estimates, coming in at $1.07 billion compared to the forecasted $1.05 billion. Encouraged by these results, Allegion raised its full-year 2025 adjusted EPS guidance to a range of $8.10 to $8.20, up from the previous estimate of $8.00 to $8.15.

However, the positive earnings report was overshadowed by concerns about rising costs. Allegion estimates tariff costs of approximately $40 million in 2025, which are included in the company's reported and organic revenue growth outlooks. While management stated they expect to offset these tariffs at the operating profit and EPS level primarily through pricing actions, investors appear skeptical about the potential impact on margins and future growth. This uncertainty, combined with broader market volatility and geopolitical tensions affecting oil prices, likely contributed to the significant sell-off in Allegion's stock.