Among the state-based offerings still being contemplated is an offering from Chesapeake Energy Corp. with a royalty trust that will hold a share of the proceeds from the company's Colony Granite Wash play in Washita County. That offering contemplates the sale of about 23 million common units, raising as much as $483 million.
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.