Waltham-based Crosspoint Assoc. has completed the sale of its 10-building office portfolio in Boston’s Fort Point to Invesco Advisers of Dallas for $183.5 million.

Crosspoint acquired the brick-and-beam office space, originally built as early 20th-century warehouses, for $120.5 million in 2007, as part of a joint venture with an Anglo Irish Bank client. Since then, the South Boston neighborhood has emerged as a hub of Boston’s startup culture, and average office rents have risen past $40 per square foot, according to a recent report by Avison Young.

The 428,000-square-foot portfolio includes 11-15 and 49-51 Farnsworth St, 12-56 Thomson Place and 19-37 Stillings St. Thomson Reuters occupies 238,566 square feet.

An Invesco spokeswoman did not immediately return a message seeking comment.

CBRE/New England, which marketed the properties, touted the buildings’ potential for redevelopment with the addition of ground-floor retail and restaurant space.