Vertiv Holdings Co is trading 4.2% up at $346.98 in pre-market, extending a sharp multi-day rally. - The rally is driven by recent strategic moves to deepen its AI data center cooling presence, including the acquisition of ThermoKey and expanded co-development with NVIDIA. - The company continues to benefit from exceptionally strong AI data center demand and a blowout 2026 outlook. - Vertiv reported approximately 30% year-over-year Q1 sales growth to $2.65 billion and a roughly 83% jump in earnings, leading to raised financial guidance.