Tamir kalifa for the boston globe

A pedestrian walked past 313 Congress St., a 70,000-square-foot building that is home to Collaborative Partners.

Tamir kalifa for the boston globe

DivcoWest acquired the Davenport Building at 25 First St. in Cambridge in March. It is home to several high-tech ventures.

Tamir kalifa for the boston globe

This 150,000-square-foot building at 51 Sleeper St. in the Innovation District is home to Agencyport Software and AvalonBay.

Tamir kalifa for the boston globe

DivcoWest also is finalizing the closing on this 99,000-square-foot building at 300 A St. in the Innovation District.

Tamir kalifa for the boston globe

The Mentor Network is in this 36,000-square-foot building at 330 Congress St. The closing is being finalized.