US quantum computing firm IonQ has announced plans to raise $2 billion through an equity offering.

The company will sell 16.5 million shares at $93 each to an entity managed by investor Heights Capital Management.

IonQ said just over five million of the shares were pre-funded. The investor has also purchased 43 million seven-year stock warrants, giving them the option to buy more shares in the future.

J.P. Morgan acted as the sole underwriter in the transaction, while Paul, Weiss, Rifkind, Wharton & Garrison LLP served as legal counsel to IonQ. Skadden, Arps, Slate, Meagher & Flom LLP acted as legal counsel to the investor.

“This investment provides an opportunity for the IonQ team to continue to grow and expand our ecosystem. IonQ is one of the only quantum companies in the world capable of delivering advanced computing, networking, and sensing solutions across every theatre – on the ground, in the air, and in space,” said Niccolo de Masi, chairman and CEO of IonQ.

“With our accelerated technology roadmap, world-renowned talent, and robust net cash position, we have strengthened our unique position. We believe this is the largest common-stock single-institutional investment in the history of the quantum industry. This $2 billion cash investment will facilitate our global growth and accelerate our quantum commercialization worldwide.”

Founded in 2015, IonQ develops systems with trapped ion technology. In June 2025, the company announced plans to acquire UK rival Oxford Ionics for $1.08bn, with hopes of combining its compute and networking research with Oxford Ionics' ion-trap technology manufactured on standard semiconductor chips.

The company previously raised $372.6bn in March of this year, also from a share sale, selling 16,038,460 shares of its common stock through an “at-the-market” equity offering program.

In early August, Amazon disclosed a $36.7 million stake in the company, a figure that represents the ownership of 854,207 shares.