ARBITRON INC

CUSIP: 03875Q108 Class: COM

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q3 2013
Shares 432,697 Value ($000) $20,769 Avg Close — Range —
Q2 2013
Shares 437,540 Value ($000) $20,324 Avg Close — Range —