CHARLOTTE, NC: Apple tops the list among twenty companies with the highest value of mentions across online news and social media in the fourth quarter last year, according to a report from General Sentiment.

In Q4 last year, Apple generated $941 million worth of mentions. Research shop General Sentiment, which conducted the analysis, assigns a value of the media impact of companies by measuring the purchase equivalent value of a brand's exposure.

In other words, a brand would have to spend $941 million ...