IonQ is a publicly traded quantum computing company developing trapped-ion quantum computers, quantum networking, and quantum sensing technologies. Co-founded in 2015 by Christopher Monroe (University of Maryland / Duke) and Jungsang Kim (Duke), IonQ commercialized trapped-ion qubit technology and became the first pure-play quantum computing company to go public via a 2021 SPAC merger with dMY Technology Group III on the NYSE under ticker IONQ. The company sells access to its quantum systems via AWS Braket, Microsoft Azure Quantum, and Google Cloud Marketplace, and has assembled an aggressive quantum platform via M&A including Oxford Ionics (trapped-ion hardware), Lightsynq (photonic interconnects), Qubitekk (quantum networking), a controlling stake in ID Quantique (QKD), Vector Atomic (quantum sensing/atomic clocks), Capella Space (SAR satellites), and Skyloom Global (space optical communications). IonQ targets 256 physical qubits at 99.99% fidelity by 2026, >10,000 qubits at 99.99999% logical accuracy by 2027, and 2 million physical qubits by 2030.
IonQ is publicly traded
This company is no longer available on our private secondary market. Shares can be traded publicly under its listed ticker.
Company data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Founded
2015
Employees
501–1,000
Total Funding
$434M
5 rounds
Last Private Valuation
$2B
Mar 8, 2021
Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Total raised $434M across 5 rounds
Last updated 06-25-2026
| Date | Round | Amount Raised | Valuation | Lead Investors |
|---|---|---|---|---|
| Mar 8, 2021 | Pre-SPAC PIPE | $350M | $2B | Fidelity |
| Jun 17, 2020 | Series C extension | $7M | — | Lockheed Martin, Robert Bosch VC, Cambium |
| Oct 22, 2019 | Series C | $55M | $0.18B | Samsung Catalyst Fund, Mubadala Capital |
Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Entry · Series C
$185M
Oct 2019
IonQ today
$2B
Mar 2021 · latest mark
IonQ multiple
10.8x
valuation uplift since first round
Y-axis is logarithmic. Hollow dots = estimated valuations. Does not represent realized investor returns.
Niccolo de Masi
Chairman & Chief Executive Officer
Inder M. Singh
Chief Financial Officer & Chief Operating Officer
Peter Chapman
Executive Chair (former CEO)
Jungsang Kim
Co-Founder & Chief Technology Officer
Christopher Monroe
Co-Founder & Chief Scientist (former)
Competitor list is illustrative and may be incomplete, stale, or erroneous.
Quantinuum
Trapped-ion quantum computing company (Honeywell/Cambridge Quantum merger) producing the Helios processor; widely cited as IonQ's closest trapped-ion competitor with industry-leading fidelity.
Rigetti Computing
Public superconducting quantum computing company (NASDAQ: RGTI) offering full-stack quantum-classical hybrid systems.
D-Wave Quantum
Public quantum annealing company (NYSE: QBTS) using a fundamentally different qubit architecture for combinatorial optimization workloads.
PsiQuantum
Private photonic quantum computing company pursuing a million-qubit fault-tolerant machine; major recent funding rounds and government deals in Australia and the US.
IBM Quantum
IBM's quantum computing division (NYSE: IBM), the largest incumbent in superconducting quantum hardware and the Qiskit software stack.
Atom Computing
Private neutral-atom quantum computing company building scalable atom-array quantum systems, a competing trapped-particle modality.
IonQ became the first publicly traded, pure-play quantum computing company on October 1, 2021 via a SPAC merger with dMY Technology Group III, listing on NYSE under ticker IONQ at an implied market cap of ~$2.0B. As of May 2026 the company trades at ~$51 per share with a market capitalization in the ~$17-21B range and has raised over $3.4B in post-IPO equity (including a $372M ATM in 2024, a $1.0B raise in July 2025, and a $2.0B raise in October 2025), fueling an aggressive 2025 M&A campaign across the quantum stack.
IonQ shares can be purchased through any standard brokerage account — including Fidelity, Charles Schwab, TD Ameritrade, and online platforms like Robinhood or E*TRADE. Search for the ticker to place an order.
IonQ had a valuation of approximately $2B at the time of its public offering. Current market capitalization fluctuates with the share price.
IonQ raised $434M across 5 disclosed funding rounds prior to its public listing.
IonQ was co-founded by Jungsang Kim, and Christopher Monroe in 2015.
IonQ is headquartered in College Park, MD, USA.
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