An Austrian company most people have never heard of is about to test whether Wall Street’s obsession with AI extends all the way back to the power plants keeping the lights on.
Innio, the gas engine and energy solutions manufacturer majority-owned by private equity firm Advent International, is targeting a valuation of up to $20.25 billion in a US IPO that would raise as much as $2.03 billion. The company plans to offer 75 million shares priced between $24 and $27 each.
The deal structure
Innio filed for its US IPO on May 11, 2026, with updated pricing details landing on May 26. The company sits under a holding entity called AI Alpine, which is co-owned by funds managed by Advent International and the Abu Dhabi Investment Authority, better known as ADIA.
ADIA joined as a major stakeholder in 2023, a move aimed at accelerating Innio’s push into green technologies.
