Attorney Collin Walke for Bloomberg Law with June Grasso 

Founded in 1966 in Tulsa, Oklahoma, Hall Estill is a full-service law firm with clients ranging from Fortune 500 corporations to traditional family businesses, as well as nonprofit organizations, entrepreneurial start-ups and individuals. More than 150 legal professionals work in the firm at offices in Tulsa, Oklahoma City, Denver and Northwest Arkansas, assisting a diversified base of local, regional, national and international clients.

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