An undisclosed Fortune 500 company will move its regional headquarters into the Dan Gilbert-owned building at 1 Woodward Ave.

Gilbert’s Bedrock Real Estate Services LLC was to make the announcement at a 9 a.m. Tuesday press conference that will be held with the new tenant’s president and CEO, Gilbert, Detroit Mayor Mike Duggan and Jim Ketai, managing partner of Bedrock at the One Woodward building.

Gilbert, the founder and chairman of Quicken Loans Inc. and Rock Ventures LLC, bought the 360,000-square-foot building in 2012 for $8.35 million from Lehman Bros. Holdings Inc., according to CoStar Group Inc., a Washington, D.C.-based real estate information service.

He owns more than 60 properties — buildings and parking decks — totaling more than 9 million square feet. He has spent more than $1.3 billion buying and renovating properties, mostly in downtown Detroit.

Kirk Pinho: (313) 446-0412, [email protected] Twitter: @kirkpinhoCDB