Sirius is based in New York, NY and is traded on the Nasdaq stock exchange under the stock symbol "SIRI.". Its business model is to provide pay-for-service radio, free of commercials, analagous to the business model for cable television. Sirius competes with XM Satellite Radio.

Sirius' spacecraft Sirius 1 through Sirius 4 were manufactured by Space Systems/Loral. The first three of the series were orbited in 2000 by Proton-K Block-DM3 launch vehicles. Sirius 4 is a ground spare.

Sirius was previously known as CD Radio.

The dog in the Sirius logo is unofficially named "Mongo."

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