How Third Rock will deploy $770M in its biggest fund yet

Staff changes and recent trends in private capital dynamics aren’t likely to sway Third Rock Ventures’ strategy as it invests its new $770 million Fund V, the firm’s largest-ever vehicle. The firm will, however, have even deeper pockets for new investments, which it hopes to make a bit more slowly than it did with Fund IV.

Since closing its $616 million Fund IV in October 2016, Third Rock has added four new partners, either via new hires or promotions, to help invest the new fund. But the firm’s 11 partners in Fund V do not include Alexis Borisy, who is embarking on an undisclosed new endeavor...