Blue Cross Blue Shield of Michigan is moving another 125 workers into the nonprofit health insurer's new offices in the Renaissance Center in Detroit.
Tuesday's relocation begins the final wave of Blue Cross Blue Shield employees heading to the downtown building.
About 2,100 were moved last year, and more than 1,200 workers are expected to do the same by June. The move to the Renaissance Center is expected to save Blue Cross $30 million in long-term real estate costs.
Blue Cross covers 4.4 million of Michigan's 9.9 million residents.