Who owns the parent company of Windstream and/or TDS?

Windstream is my dsl and phone provider, and I would like to know who's thier parent company, also who is TDS's parent company? Both companys offer dsl and phone packages. I know that winstream competes with Time Warner and company. If anyone has any information on either Windstream's parent company or TDS's, please let me know. Thank You.|||Windstream was formed by Alltel's land line business and Valor communications.