In a string of new leases, several investment companies will join the roster at Boston Properties, 250 W. 55th St., at Eighth Avenue. The newly-constructed Midtown West 38-story tower, similar in structure to the classic Park Avenue Lever House, has nearly 1 million square feet.

Veracen Partners, a financial investment advisory firm, is opening a new office in Manhattan, with a 10-year lease for 11,263 square feet. In addition, RTW Investments, a healthcare focused investment management firm, has a five-year lease for 4,029 square feet and, is relocating from 1350 Avenue of the Americas. LifeSci Capital, an affiliate of LifeSci Advisors, a consultancy to life-sciences, medical, technology and healthcare clients, is currently a subtenant of RTW. LifeSci also has a new five-year direct lease for 3,167 square feet with Boston Properties. All three will occupy pre-built space on the 16th floor.