IonQ posts $173.8 million Q3 revenue and raises 2026 guidance to $505M-$515M

IonQ just had the best quarter in its history. The stock market responded by knocking roughly a tenth off its share price.

The quantum computing company reported $173.8 million in GAAP revenue for the third quarter of 2026, up 336% year over year. It also raised its full-year revenue guidance to between $505 million and $515 million, up from a prior range of $450 million to $460 million.

The numbers behind the record

This was IonQ’s sixth record quarter in a row, and it came in ahead of consensus estimates.

The revenue splits into two clean pieces. The IonQ Platform segment, which covers the company’s quantum computing business, brought in $90.3 million, up 127% from the same quarter last year.

The other $83.5 million came from SkyWater Technology, which IonQ acquired. That segment contributes foundry services revenue, meaning it earns money manufacturing chips rather than selling quantum computers.

That distinction matters for anyone reading the 336% figure. A big chunk of the headline growth is acquisition math. The core platform still more than doubled, which is impressive on its own terms.

Looking at the full year, IonQ expects quantum computing revenue to grow 110%. The company is pointing to deployments of its Tempo quantum computer as a key driver of that momentum.

The forward-looking number that may matter most is backlog. IonQ’s remaining performance obligations, essentially signed work it has not yet delivered and booked as revenue, more than doubled to $1.2 billion.

A balance sheet with some asterisks

IonQ ended the quarter with $1.7 billion in cash, cash equivalents, and investments. After an equity offering in October 2026, the company’s pro-forma cash position stands at $3.7 billion.

The bottom line looks spectacular at first glance. IonQ reported GAAP net income of $564 million for the quarter.

Look closer, though, and the profit benefited from non-cash warrant adjustments. Those are accounting changes tied to the value of warrants, not cash generated by selling quantum hardware or services.

The operating picture is better captured by adjusted EBITDA, which strips out several non-cash and one-time items. On that basis, IonQ posted a loss of $133.6 million.

Why the stock went the other way

IonQ’s shares fell approximately 10% on the day the results came out.

The concerns weighing on sentiment are fairly straightforward. Operating losses remain large, recent equity offerings have diluted shareholders, and folding acquisitions like SkyWater into the business brings integration challenges.

What this means for IonQ and the quantum sector

For IonQ shareholders, the quarter offers two competing readings. The bullish read focuses on the raised guidance, the 110% expected growth in quantum revenue, and a $1.2 billion backlog that suggests customer demand is real.

The cautious read focuses on the adjusted EBITDA loss, the reliance on acquired foundry revenue to reach the headline number, and the share issuance behind that $3.7 billion cash pile. The roughly 10% drop suggests the cautious camp had the louder voice this time.

Several things are worth watching from here. The first is how the IonQ Platform segment grows independently of SkyWater, since that is the purest measure of demand for quantum computing itself.

The second is how quickly the $1.2 billion backlog converts into recognized revenue.

The third is the trajectory of adjusted EBITDA losses. With $3.7 billion in pro-forma cash, IonQ is not under immediate pressure.