IonQ is a publicly traded quantum platform company (NYSE: IONQ) building trapped-ion quantum computers alongside quantum networking, sensing and security products. Founded in 2015 by Christopher Monroe and Jungsang Kim, it became the first pure-play quantum company to list publicly, via a 2021 SPAC merger, and sells system access through AWS Braket, Microsoft Azure Quantum and Google Cloud. An aggressive acquisition programme -- Qubitekk, ID Quantique, Lightsynq, Capella Space, Oxford Ionics, Vector Atomic, Skyloom, Seed Innovations, Nexus Photonics and, in July 2026, semiconductor foundry SkyWater Technology -- has made IonQ a vertically integrated, full-stack quantum platform.
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
1,001–5,000
Total Funding
$434M
5 rounds
Last Private Valuation
$2B
Mar 8, 2021
Closed $1.8B acquisition of SkyWater Technology, forming first vertically integrated quantum platform company
Adds domestic chip fab capacity; ~$741M cash plus new shares deployed, diluting some cash cushion
Agreed to raise $2B from Heights Capital (Susquehanna) via equity sale at $93/share, a 20% premium to prior close
Large premium-priced equity raise; supports public-market valuation, fresh cash reduces dilution risk
Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Total raised $434M across 5 rounds
Last updated 10-11-2026
| 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 the NYSE under ticker IONQ at an implied market capitalization of ~$2.0B. As of September 10, 2026 it trades at $36.84 per share for a market capitalization of ~$14.6B. Post-IPO equity raises -- a $372M ATM in 2024, $1.0B in July 2025 and $2.0B in October 2025 -- have funded a continuous acquisition programme across the quantum stack, culminating in the ~$1.8B cash-and-stock purchase of NASDAQ-listed semiconductor foundry SkyWater Technology, completed July 31, 2026, which made IonQ a vertically integrated quantum platform owning design, wafer fabrication and advanced packaging.
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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