List of Companies involved in Quantum Computing or Communication

A previous partial list can be found on CB Insights.

Company	Date initiated	Area	Affiliate University or Research Institute
1QBit	1 December 2012	Computing
Airbus	2015	Computing
Aliyun (Alibaba Cloud)	30 July 2015	Communication
Anyon Systems Inc.	2014	Computing
Artiste-qb.net		Computing
Atos		Communication
Booz Allen Hamilton		Computing
BT		Communication
Cambridge Quantum Computing Ltd.	2014	Computing	University College London
Carl Zeiss AG			University College London
D-Wave	1 January 1999	Computing
EvolutionQ		Communication	University of Waterloo
Fujitsu	28 September 2015	Communication	University of Tokyo
Georgia Tech Quantum Institute		Computing	Georgia Tech
Google QuAIL	16 May 2013	Computing	UCSB
h-bar	2016	Computing/Communication
Hitachi		Computing	University of Cambridge, University College London
HP		Communication
HRL Laboratories		Computing
Huawei Noah's Ark Lab		Communication	Nanjing University
IBM	10 September 1990[1]	Computing
ID Quantique	1 July 2001	Communication
Infosec Global		Communication
ionQ		Computing	University of Maryland
Intel	3 September 2015	Computing	TU Delft
KPN		Communication
Lockheed Martin		Computing	University of Southern California, University College London
MagiQ		Communication
Microsoft Research QuArC	19 December 2011	Computing	TU Delft, Nils Bohr Institute, University of Sydney, Purdue University, University of Maryland, ETH Zurich, UCSB
Microsoft Research Station Q	22 April 2005	Computing	UCSB
Mitsubishi		Communication
NEC Corporation	28 September 2015	Communication	University of Tokyo
Nokia Bell Labs		Computing	University of Oxford
Northrop Grumman		Computing
NTT Laboratories		Computing	Bristol University
NuCrypt		Communication
QC Ware		Computing
QuantumCTek		Communication	University of Science and Technology of China
Quantum Circuits	28 March 2016	Computing	Yale University
Quantum Diamond Technologies		Metrology	Harvard University
Qubet		Communication
Qubitekk	2012	Computing/Communication
QuintessenceLabs		Communication
QxBranch	2014	Communication
Raytheon/BBN		Communication	MIT
Rigetti		Computing
RIKEN		Computing	Tokyo University of Science
SeQureNet		Communication
SK Quantum		Communication
Sparrow Quantum	May 2016	Communication	Niels Bohr Institute
Toshiba		Communication	University of Cambridge
Zyvex		Computing	University College London

References

1. Bennett, C.H., Bessette, F., Brassard, G. et al. J. Cryptology (1992) 5: 3. doi:10.1007/BF00191318