The IPO Buzz: INNIO (INIO) Jumps in NASDAQ Debut After Big Upsizing

INNIO Holding (INIO) shares shot higher in their NASDAQ debut today – opening at $31.00 – up $4.00 for a 14.81 percent gain from their IPO price of $27.00. INNIO, which makes reciprocating gas engines and power generation systems for the grid as well as for data centers and factories, upsized its IPO last night at pricing. The deal’s size was increased to 90 million shares – from 75 million in the prospectus – and the IPO was priced at $27.00 – the top of its range – to raise $2.43 billion on Wednesday night, June 3, 2026.

Goldman Sachs, J.P. Morgan and Morgan Stanley served as the joint lead book-runners. BofA Securities, Barclays and Citigroup also served as joint book-runners. The investment banking team included Baird, BNP Paribas, Deutsche Bank Securities, RBC Capital Markets and UBS Investment Bank.

At pricing, INNIO had a market cap of about $20.66 billion.

This IPO consisted entirely of stock offered by the principal shareholder, which was the only selling shareholder.

Advent, a private equity firm, and the Abu Dhabi Investment Authority, co-own the selling shareholder. INNIO will not receive any proceeds from the IPO.

Goldman Sachs, J.P. Morgan and Morgan Stanley served as the joint lead book-runners. BofA Securities, Barclays and Citigroup also served as joint book-runners. The investment banking team included Baird, BNP Paribas, Deutsche Bank Securities, RBC Capital Markets and UBS Investment Bank.

INNIO is based in Munich, Germany. Its U.S. headquarters is in Waukesha, Wisconsin. The profitable company’s business runs two segments – equipment and services. Its equipment segment sells engines under its Jenbacher and Waukesha brands. These engines have output ranging from 200 kW to 10 MW; the engines are designed to run on natural gas as well as on hydrogen blends and other alternative fuels. Its services segment supplies parts and performs maintenance for its installed base of equipment under multi-year contracts.

(For more information about this company, please check the IPO Calendar and the individual IPO Profile found on the IPOScoop.com website.)

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