Quantum/Well known

Quantinuum

Builds trapped-ion quantum computers and quantum software, formed from Cambridge Quantum and Honeywell Quantum Solutions.

Why it's here

Priced its Nasdaq IPO (QNT) on 3 June 2026 at a market cap of about $15.4B, well above the $1B threshold.

Focus: Quantum Computing
Founded: 2021
Latest round: IPO, $1.68B, Jun 2026
London office: Partnership House, Carlisle Place, London, Westminster SW1P 1BXsource: quantinuum.com
London presence: Office (HQ elsewhere)source: en.wikipedia.org
Investors: J.P. Morgan (lead), Amgen, Cambridge Quantum Holdings, Honeywell, IBM, JSR, Mitsui & Co, Quanta Computer, Serendipity Capitalsource: thequantuminsider.com
Area: Victoria & Westminster
Nearest station: Victoria, 181 m
Companies House: QUANTINUUM LTD (09109848, active)Incorporated 1 Jul 2014 · SIC 62090
Hiring: 12 open roles in London ↗Public job board, checked 9 Oct 2026
Work model: Mixed (from 12 London job posts)Current job posts only, checked 9 Oct 2026. Howsource: jobs.eu.lever.co
Visas: Licensed visa sponsor, listed as Quantinuum Limitedsource: gov.uk

For Quantinuum