Allegion plc's first-quarter 2026 earnings fell short of expectations, with adjusted earnings per share of $1.80, down from $1.86 last year and missing estimates by 8.4%. However, the company achieved a notable 9.7% year-over-year revenue increase, totaling $1.03 billion and surpassing consensus estimates. Looking ahead, Allegion projects revenue growth of 6% to 8% for the year, despite a decline in operating margin to 18.9%, reflecting rising operational costs amid ongoing disruptions from an ERP implementation.