Quantinuum
Quantinuum develops quantum computing hardware and software, combining Cambridge Quantum's software with Honeywell's trapped-ion technology. The company has raised $1.2B and employs 730 people.
The growth story
Quantinuum grew from 85 to 730 employees between 2021 and 2026, raising $1.2B along the way, most recently a Series B in August 2025.
About
Quantinuum builds quantum computing systems that integrate software and hardware components, targeting enterprise applications. Its technology combines Cambridge Quantum's software expertise with Honeywell's trapped-ion hardware capabilities.
The company was formed in 2021 through the merger of Cambridge Quantum and Honeywell Quantum Solutions. With $1.2B in funding, it has scaled to 730 employees, positioning itself as a major player in the quantum computing space.
Founders and leadership
Quantinuum's largest function is engineering, with 151 employees. The company's leadership combines expertise from Cambridge Quantum and Honeywell Quantum Solutions, reflecting its origins as a merger of these two entities.
The Quantinuum org chart
Ilyas Khan, KSG (Founder) leads 59 mapped leaders with 2 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Research 223 (+21% YoY), Engineering 144 (+18% YoY), Information Technology 57 (+19% YoY), Operations 57 (+78% YoY), Business Development 25 (+32% YoY), Human Resources 23 (+35% YoY).
Talent flow
Quantinuum's workforce draws heavily from Honeywell Technologies (101 hires) and Cambridge Quantum (31 hires). Other key talent sources include the National Institute of Standards and Technology (24 hires) and the University of Colorado Boulder (24 hires). Alumni have moved to quantum computing firms like IonQ and Oxford Ionics.
Most common previous employers of Quantinuum staff: Honeywell Technologies (101), Cambridge Quantum (31), National Institute of Standards and Technology (NIST) (24), University of Colorado Boulder (24), Lockheed Martin (14), University of Cambridge (10). Former Quantinuum employees most often moved to IonQ (7), Oxford Ionics (6), Relational Intelligence (4), Quantinuum (4), CuspAI (3), PsiQuantum (3).
Alumni worth knowing
The Quantinuum mafia
Quantinuum alumni have founded 11 companies, including CuspAI (83 staff), Enginuity Power (28 staff), and Phaseshift (7 staff). These startups span quantum computing, energy, and AI sectors.
13Chad Edwards, was Founding Commercial Lead until 2024Tony Uttley, was President & Chief Operating Officer until 2023Rezlind Bushati, was Senior Advanced Scientist until 2025Tim Weaving, was Research Internship until 2023Bob Coecke, was Chief Scientist until 2026Alexis Toumi, was Scientific Advisor until 2024
Giovanni de Felice, was Senior Scientist until 2026
Ali Hussein, was (Q)AI Scientist and Researcher until 2025
Gyanateet Dutta, was QNLP Software Intern until 2025
Lauren Ryan, was Senior Marketing Communications Specialist until 2025
Sean Braxton, was Senior Advanced Optical Engineer until 2022Hiring now
Web traffic
Traffic mix: 24% direct, 65% search, 4% social, 0% paid.
What this company is made of
Most common skills at Quantinuum: Python (Programming Language) (258), MATLAB (204), Research Skills (203), Microsoft Office (195), Data Analysis (176), Leadership (166), Project Management (161), Physics (158).
Where the team actually sits
Quantinuum people are concentrated in Colorado, United States (199), England, United Kingdom (83), Denver Metropolitan Area (52), Minnesota, United States (39). 7 offices on record.
Search footprint
Quantinuum attracts about 6,521 organic search visits a month, traffic worth roughly $14K a month if bought through ads. It gained 853 ranking keywords and lost 524 in the last period.
What employees say
- Compensation
- 3.30 / 5
- Career opportunities
- 3.10 / 5
- Senior management
- 2.90 / 5
- Work-life balance
- 4.10 / 5
Frequently asked
Quantinuum has 730 employees as of September 2026.
Quantinuum has raised $1.2B in total, most recently a Series B round in August 2025.
Quantinuum was founded in 2021 by Ilyas Khan, KSG.
Ilyas Khan, KSG (Founder) sits at the top of Quantinuum's reporting structure, with 2 direct reports.
The most common previous employers of current Quantinuum staff are Honeywell Technologies (101 people), Cambridge Quantum (31 people), National Institute of Standards and Technology (NIST) (24 people).
Former Quantinuum employees most often move to IonQ (7), Oxford Ionics (6), Relational Intelligence (4).
At least 11 companies have a founder who previously worked at Quantinuum, including CuspAI, Enginuity Power, Phaseshift.
Quantinuum attracts about 6,521 organic search visits a month, worth roughly $14K a month in equivalent ad spend.
The most common skills among Quantinuum staff are Python (Programming Language), MATLAB, Research Skills, Microsoft Office, Data Analysis.
Quantinuum staff are concentrated in Colorado, United States (199), England, United Kingdom (83), Denver Metropolitan Area (52).
Quantinuum has about 223 people in Research, up 21% over the past year, as of September 2026.
Quantinuum has about 144 people in Engineering, up 18% over the past year, as of September 2026.
Computed from 565 current and 258 former Quantinuum profiles, as of September 2026. Source: Crustdata.
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