ROCKLAND — Since it was built more than 20 years ago, the sprawling waterfront commercial building on Water Street has been the home to multiple large-scale employers.

An owner of the 77,000-square-foot building at 12 Water St. said the building is now being rented out to multiple smaller tenants and that there is much additional space available for lease.

Stuart Smith, one of the principals of the property owner Rockland Harbor Park Inc., said the building is being developed similar to the Breakwater Marketplace on Camden St. which he is also one of the owners. Space at the Water Street building will be available from as little as 500 square feet to as much as 15,000 square feet.

There are already a few tenants lined up, Smith said.

The Rockland Harbor YMCA remains a longtime tenant.

The building was constructed in 2001 by MBNA. MBNA closed its Rockland operations in 2005. Rockland Harbor Park purchased the complex in 2007.

In June 2008, state and local officials announced with major fanfare that it had attracted Boston Financial Data Services to locate in Rockland at the Water St. building, bringing hundreds of jobs to the region.

DST Systems Inc. bought Boston Financial in March 2017 and in January 2018, SS&C Technologies Holdings Inc. bought DST.

When the COVID-19 pandemic swept the country, DST closed some of its offices center across the country including Rockland but continued to employ those workers in the region who were allowed to work remotely from home, Stuart said.

Telephone messages were left with SS&C at its corporate headquarters in Connecticut but have not been returned.