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NAI Sullivan Group in Oklahoma rebrands as NAI Red

With a new name, location and leadership team, NAI Red eager to hit the bricks
Sam Swanson, left, and David Hartnack. (CoStar)
Sam Swanson, left, and David Hartnack. (CoStar)
By Samuel Spangler
CoStar Research
August 7, 2025 | 8:41 P.M.

After 23 years, NAI Sullivan Group has rebranded as NAI Red, with longtime principal Bob Sullivan, an industry leader for over four decades, passing the reins to David Hartnack and Sam Swanson, who have a combined 55 years of experience.

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