** Shares of Honeywell's Quantinuum QNT.O jump as much as 18.9%; last up 8.7% at $65.21

** Stock opened for trading at $68 vs $60 offer price

** QNT sold 28 million shares in an upsized offering above the latest marketed range of $53-$55 per share to raise $1.68 billion

** Breakthroughs in the fast-growing technology have spurred bets that quantum machines could eventually outperform conventional computers on certain complex tasks

** Quantum-linked firms trade at the outer end of the equity risk spectrum. As such, it has to be expected that only few of those IPOs will eventually make money for investors, while many will underperform and fail - IPOX CEO Josef Schuster

** "The fact that investors are financing these deals underlines the strength of the U.S. capital markets ecosystem as world's deepest and most advanced, and best performing," Schuster said

** J.P. Morgan and Morgan Stanley acted as joint lead active book-running managers for offering