Marconi's Wireless Telegraph Company of Canada
(1903)

Canadian Marconi Company Ltd.
(1925)

CMC Electronics, Inc.
(2001)

Esterline Avionics Systems - CMC Electronics
(2007)

CMC's principal locations were in Montreal, Quebec; Ottawa, Ontario; and Chicago, Illinois.

Radio Tubes were made for the company from c. 1927. In 1939 tubes offered numbered over 160 receiving types. Some were branded Marconi and some "Made in Canada for Marconi".

1903 Incorporation of Marconi's Wireless Telegraph Company of Canada
1925 Name changed to Canadian Marconi Ltd.

1948 English Electric Company Ltd. (UK) buys Marconi Company (UK)
1953 English Electric acquires 50.6% of Canadian Marconi
1968 English Electric bought by GEC (UK)
1999 BAE Systems (British Aerospace) purchases GEC's share of CMC

2000 Name changed to BAE Systems Canda
2001 BAE bought by ONCAP (an investment group lead by Onex Corporation)
2001 Transfer of all shares to ONCAP

Rights to the Marconi name sold to Marconi plc., the former GEC (date uncertain)

2001 Name changed to CMC Electronics Inc.
2007 CMC aquired by Esterline (in March)

2019 Esterline acquired by TransDigm Group Inc