Concentration Risk

6 Months Ended

Jun. 30, 2012

Concentration Risk

14. Concentration Risk

Arbitron is a leading media and marketing information services firm primarily serving radio, advertisers, advertising agencies, cable and broadcast television, retailers, out-of-home media, online media, mobile media, telecommunications providers, and print media.

The Company’s quantitative radio audience ratings service and related software licensing revenue accounted for the following percentages, in the aggregate, of total Company revenue:

	Three- Month Period Ended June 30, 2012			Three- Month Period Ended June 30, 2011			Six-Month Period Ended June 30, 2012			Six-Month Period Ended June 30, 2011
Quantitative radio audience ratings service and related software licensing revenue		82	%		81	%		89	%		89	%

The Company had one customer that individually represented approximately 19% of its annual revenue for the year ended December 31, 2011. The Company had two customers that individually represented approximately 18% and 10% of its total accounts receivable balance as of June 30, 2012, and two customers that individually represented approximately 23% and 11% of its total accounts receivable balance as of December 31, 2011. The Company has historically experienced a high level of contract renewals.