It plans to upgrade the 376,000-square-foot building — a mix of office and warehouse space — and bring in a new generation of tenants.The Davis Companies, a development firm, closed on a deal Thursday to take over 88 Black Falcon Ave., a three-story complex of office and industrial space at the easternmost tip of Boston’s booming Seaport District.

 We hope we’ll be able to get companies that are actively involved in making things that really need space out here.”Massport CEO Tom Glynn said he was glad that Prologis — a national warehouse operator that is selling off its properties in New England — found an experienced local developer with plans to invest.

Davis said he expects to see tenants evolve over time, although planned renovations won’t displace existing businesses. Renovations are to be completed by next summer.That project has attracted a string of big-name tenants, such as software firm Autodesk, Elkus Manfredi Architects, and, soon, the world headquarters of Reebok.