Exhibit 99.1 Plug Power Second Quarter 2025 Highlights · Execution on Project Quantum Leap helps accelerate business sales growth and financial performance · Q2 revenue up 21% year-over-year, driven by broad hydrogen demand LATHAM, N.Y., August 11, 2025 — Plug Power Inc. (NASDAQ: PLUG), a global leader in comprehensive hydrogen solutions for the hydrogen economy, today announced its financial results and operational milestones for the second quarter ended June 30, 2025. Revenue Growth and Run Rate Momentum ...