Roche's Foundation Medicine is getting a new 16-story home in Boston's Seaport District

A developer and an investment firm have joined together to add yet another biotech building to Boston’s skyline. And today, a private equity firm has joined the venture.

KKR announced today that it completed an investment and is now in a joint venture with WS Development and the Public Sector Pension Investment Board for 400 Summer Street, a life science tower under construction in Boston’s Seaport District. The amount that KKR invested into the construction of the project remains undisclosed.