SIRIUS XM RADIO INC

CUSIP: 82967N108 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q4 2013
Shares 2,310,096 Value ($000) $8,062 Avg Close — Range —
Q3 2013
Shares 558,987 Value ($000) $2,163 Avg Close — Range —
Q2 2013
Shares 981,253 Value ($000) $3,287 Avg Close — Range —