Quantinuum Shares Pare Gains to Close Little Changed After IPO

Quantinuum Inc. signage during the company’s initial public offering (IPO) at the Nasdaq MarketSite in New York, US, on Thursday, June 4, 2026. Quantinuum Inc., a quantum computing company backed by Honeywell International Inc., raised $1.68 billion in its upsized US initial public offering, demonstrating growing investor enthusiasm for the emerging technology.