IonQ announced on October 12, 2026, that it would acquire Elisity, a Dallas company that sells identity-based network microsegmentation, in an all-stock transaction valued at up to $1.3 billion. Up to $150 million of that amount is an earnout tied to the performance of Elisity’s business.
IonQ will set the number of shares at closing from its volume-weighted average share price over 20 trading days, using a price no lower than $33.07 and no higher than $49.61. The company expects to close in the fourth quarter of 2026, subject to regulatory approval. Elisity will keep its current leadership, including its chief executive, James Winebrenner.
IonQ is buying Elisity’s customer relationships and its network-enforcement software, while the post-quantum feature the companies described, a cryptographic inventory, is still on their joint roadmap.
Disclosure: Quantum Observer’s Editor-in-Chief Marin Ivezic is the founder and CEO of Applied Quantum, a quantum systems integration and consulting firm, and the author of its PQC Migration Framework.
What Elisity sells
With microsegmentation, a security team divides a network into small zones defined by identity, so a compromised laptop or medical device can reach only the systems its policy allows. IonQ said Elisity’s IdentityGraph software informs least-privilege access policies for users, devices, workloads, and AI agents, so that each can reach only what it needs.
Elisity’s Virtual Edge software then programs those access policies into switches a customer already owns, from vendors including Cisco, Arista, HPE Aruba Networking, and Hirschmann. Elisity said customers need no endpoint agents or new hardware.
Customers named by Elisity and its investor Insight Partners include the drug maker GSK, the health insurer Bupa, the flooring maker Shaw Industries, and the U.S. health system MultiCare. Elisity raised a $37 million Series B round from investors including Insight Partners in April 2024, for total funding of more than $72 million.
IonQ’s security business
IonQ sells quantum key distribution (QKD) systems and quantum random number generators made by ID Quantique (IDQ), a Geneva company in which IonQ completed the purchase of a controlling stake in May 2025. QKD is a method of sharing encryption keys over optical fiber that relies on quantum physics.
In the Elisity announcement, IonQ listed quantum-safe posture management, QKD, and post-quantum cryptography (PQC) among its security offerings. IonQ has described the posture-management offering as giving customers visibility into their infrastructure to find where they are vulnerable to quantum attacks. PQC refers to the encryption and signature algorithms designed to resist attacks by quantum computers. IonQ named Switzerland, Poland, Romania, and Slovakia among the countries where it has deployed quantum-safe national networks.
What IonQ says it is buying
IonQ said it would gain “expanded channels to bring its PQC, QKD and quantum computing offerings to market” for enterprise and government networks through Elisity’s more than 100 global customer deployments and Elisity’s relationships with chief information security officers.
IonQ also said Elisity has a record of doubling its revenue and its customer base year over year, with zero churn among deployed customers. Neither company disclosed Elisity’s revenue. IonQ put the microsegmentation opportunity at more than $10 billion, with double-digit compound annual growth, without saying how it defined the market.
Niccolo de Masi, IonQ’s chairman and chief executive, said in the announcement that Elisity “will bring proven enterprise policy enforcement scale and deployment experience” to IonQ’s quantum security strategy. He compared the deal with IonQ’s purchase of SkyWater Technology, a U.S. semiconductor foundry it took over on July 31.
Winebrenner said in the same release that Elisity’s customers “need to prioritize post-quantum cryptography initiatives” while securing existing assets.
Roadmap and deadlines
IonQ said the shared roadmap “will extend IdentityGraph with cryptographic inventory and risk information.” A cryptographic inventory is a record of which algorithms and keys an organization uses and where. IonQ did not say in the release which measures of Elisity’s performance it would use for the earnout.
IonQ tied the deal to the executive order on advanced cryptographic attacks signed on June 22, 2026, Executive Order 14412. Under the order, U.S. federal agencies must move their high-value assets and high-impact systems to post-quantum key establishment by the end of 2030 and to post-quantum signatures by the end of 2031.
Update, November 12, 2026: IonQ completed the acquisition on November 4. It paid $1.15 billion in common stock at closing and will pay up to $150 million more if Elisity meets revenue milestones through January 2028.
