Some Oklahoma Inc. firms made their final appearances in last year's rankings.
Pre-Paid Legal Services Inc. went private after the Ada company was acquired for $650 million by a New York-based private equity firm. The company, which sells a subscription to a package of limited legal services, has changed its name to LegalShield.
Broken Arrow-based XETA Technologies, a communications technology firm, was acquired by PAETEC Holdings Corp. in a $61 million deal.
And Bronco Drilling Co. was bought out by Chesapeake Energy Corp. in a $315 million transaction to merge into its current drilling company.
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