Quadrature

Quadrature is one of London's most deliberately invisible trading firms. Founded in 2008 by Greg Skinner and Suneil Setiya, both out of the quant shop G-Research, it builds statistical models to hold market-neutral positions in global securities, and it has traded only its own capital since stepping away from outside money around 2018.

The founders also endowed the Quadrature Climate Foundation in 2019, channelling a large share of the firm's proceeds into climate philanthropy. The trading business itself stays quiet, occupying the upper floors of the Leadenhall Building and expanding into Singapore and New York while saying almost nothing in public.