A former Boston Wharf Co. industrial building in the Fort Point Channel neighborhood of South Boston has sold for $52.75 million.

Synergy Investments sold the 102,727-square-foot building at 51 Melcher St. to a member company of Zurich North America, advised by New York City-based Zurich Alternative Asset Management, after spending two years renovating and repositioning the property. Synergy’s partner in ownership and sale of the property is Independencia Asset Management LLC.

The building was empty when Synergy purchased it in 2012 for $10.5 million. It is currently 100 percent leased to three companies: WeWork, Life is good and NetSuite.

Synergy spent millions of dollars repositioning the building in the market, including base building renovations, a new main entrance and lobby, HVAC systems, new and restored windows and new roof, restrooms, plumbing, electrical service and elevators.

"Synergy did a very impressive job with this asset, and we are very pleased to be adding such a high-quality, well-located property in such a strong market to our growing portfolio," Sean Bannon, managing director and head of U.S. real estate at Zurich, said in a statement.

The 51 Melcher St. building was constructed in 1915 as part of the Boston Wharf Co. complex that eventually numbered more than 100 buildings. A portfolio from that inventory, including 51 Melcher, was sold to Goldman Sachs/Archon in the early 2000s.