ARBITRON INC

CUSIP: 03875Q108 Class: COM

Magnetar Financial LLC's Holding History (CIK: 0001352851)

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

Q1 2013
Shares 315,328 Value ($000) $14,779 Avg Close — Range —
Q4 2012
Shares 478,700 Value ($000) $22,346 Avg Close — Range —