D-Wave Quantum Stocks Rise 18.8% After-Hours on AT&T Partnership News

Quantum computing stocks including D-Wave Quantum (NYSE: QBTS) rose in after-hours trading on May 27 (local time) following an announcement that AT&T would expand its use of D-Wave technology in network operations. D-Wave closed regular trading down 5.20% at $16.21 but surged 18.8% after-hours, while Rigetti Computing (NASDAQ: RGTI) gained 10.53% during the session before declining 2.17% post-market. The gains came amid significant year-to-date volatility, with most quantum stocks down over 30% in 2026.

D-Wave Quantum Gains 18.8% After-Hours on May 27

D-Wave Quantum fell 5.20% to $16.21 during regular trading hours on May 27 (local time) on the New York Stock Exchange, according to Yahoo Finance on the 28th. The stock then rose 18.8% in after-hours trading.

Rigetti Computing rose 10.53% during the regular session but declined 2.17% after market close.

IonQ (NYSE: IONQ) stocks gained 8.81% in regular trading before falling 1.33% after-hours.

IBM (NYSE: IBM) stocks closed regular trading up 0.98% and fell 0.46% in after-hours trading.

AT&T Expands D-Wave Technology in Network Operations

Yahoo Finance reported that AT&T announced it would expand the application of D-Wave Quantum's technology in its network operations. The agreement between the two companies, based on a prior pilot project, aims to optimize telecom operations.

Quantum Stocks Fall Over 30% Year-to-Date

Quantum computing stocks have experienced considerable volatility in 2026, with most falling more than 30% year-to-date.

US Commerce Department Announced $2 Billion Quantum Subsidies in May

Quantum stocks surged after the US Commerce Department announced in May that it would provide a total of $2 billion in subsidies to quantum computing industry companies including IBM to foster the sector.

FAQ

What happened to D-Wave Quantum stocks on May 27?

D-Wave Quantum stocks fell 5.20% to $16.21 during regular trading on May 27 (local time) but rose 18.8% in after-hours trading following AT&T's announcement to expand D-Wave technology use in network operations.

Why did quantum computing stocks rise after-hours on May 27?

Quantum stocks rose after AT&T announced it would expand the application of D-Wave Quantum's technology in its network operations, based on a prior pilot project aimed at optimizing telecom operations.

How have quantum stocks performed in 2026?

Most quantum computing stocks have fallen more than 30% year-to-date in 2026, demonstrating considerable volatility despite the US Commerce Department's announcement in May of $2 billion in subsidies for the quantum computing industry.