The satellite radio provider raised its full-year guidance for net subscriber additions to 1.8 mil from 1.6 mil after adding more subscribers in Q3 than any time since its '07 merger. Sirius XM (SIRI) has more than 23 mil subscribers. The announcement came in tandem with management's speaking engagement at the Liberty Media (LMCA) investor conference. Liberty owns just less than half of Sirius and has been trying to gain full control of the firm. Shares rose 4.6% to 2.75.