The roster of Oklahoma's publicly traded service sector companies got slimmer this year, after Dollar Thrifty was bought by The Hertz Corp. and Graymark Healthcare dropped off the Nasdaq Stock Market.
Sonic Corp., based in Oklahoma City, was this year's leading service industry company and 11th ranked overall — up from 16th last year. The company, which has more than 3,500 drive-in restaurants nationwide, saw a 45 percent total return in stock and dividends. Revenue dipped 1.7 percent to $535 million, compared to 2012.
Other service sector companies include ADDvantage Technologies Group Inc., a Broken Arrow-based company that resells cable TV equipment, which climbed three spots to No. 30, and Tulsa children's bookmaker Educational Development Corp., which fell to No. 35 from No. 30.
Auto rental company Dollar Thrifty, which last year ranked No. 14 overall, was bought by Hertz, the world's second largest car rental chain for $2.3 billion. The deal received final approval by the Federal Trade Commission in July.
Another company absent from this year's Oklahoma Inc. rankings, Graymark Healthcare, could come back. Oklahoma City-based Graymark, which specialized in diagnosing and treating sleep apnea, had its stock removed from the Nasdaq last November after failing to meet minimum stock price requirements. It is now trading over the counter under the symbol GRMH.
In July, the company completed a reverse merger with Foundation Surgery Affiliates. The new company will focus on the surgical facility business and is looking at re-listing its stock.