One of the early corporate pioneers to settle in Boston’s Seaport District, Fidelity Investments has seen the surrounding neighborhood grow into an 11 million-square-foot office market occupied by a broad range of industries including law firms, tech startups and life science companies.

Fidelity’s Pembroke real estate arm held a virtual groundbreaking ceremony Thursday to mark the beginning of its Seaport World Trade Center on Commonwealth Pier redevelopment, adding retail space and waterfront public plazas at the 737,560-square-foot complex.

Gov. Charlie Baker and Boston Mayor Marty Walsh provided videotaped testimonials to the company’s longtime presence in the transforming waterfront district. Walsh noted that he worked on the complex’s construction in his first building trades job as an 18-year-old.

The project adds 134,000 square feet of office space while eliminating the complex’s 132,000-square-foot exhibition hall. Fidelity leases the Massport-owned property.

Other elements of the project include a 25,000-square-foot outdoor Harbor Plaza, expansion of the Boston Harborwalk using space cut out of the building perimeter, 45,000 square feet of new retail space, a new Seaport Hotel ballroom and event facility within and next to the Headhouse, new ferry berthing and waiting areas and dock space for a water shuttle stop

Approximately 90 percent of Fidelity’s employees are working from home during COVID-19, spokesman Michael Aalto said.

Completion of the project, being led by Turner Construction Co. and Janey Construction Management, is scheduled for 2024.