XM Satellite Radio brought in revenues of $933 million in 2006, up 67 percent from 2005, XM Satellite Radio Holdings Inc. announced Feb. 26.

XM also added 1.7 million net new subscribers in 2006 to bring its total subscribers to 7.6 million. Subscription revenue grew 64 percent to $825.6 million in 2006, compared to $502.6 million in 2005, while advertising revenue grew 76 percent to $35.3 million in 2006. The gains were driven by subscriber growth and increases in average revenue per subscriber from price increases implemented in 2005.

Subscriber acquisition cost held steady at $64 for the second consecutive year, while cost per gross addition slipped from $109 in 2005 to $108 in 2006.

XM lost $718.9 million in 2006, compared to a loss of $666.7 million in 2005. The 2006 loss included a $76.6 million charge for investments in WorldSpace and Canadian Satellite Radio, and charges of $122.2 million for balance sheet restructuring.

XM and rival Sirius Satellite Radio announced on Feb. 19 their plans to combine under a deal valued at about $13 billion, but the transaction faces intense U.S. government scrutiny. Sirius CEO Mel Karmazin and other witnesses are scheduled to appear on Feb. 28 before the House Judiciary Committee’s newly formed Antitrust Task Force.