Angus Horner established Prorsus in 2009. Angus is a Chartered Surveyor who for a decade and a half has been successfully leading design, planning, professional, agency, marketing and project finance teams.

In 2011 Prorsus founded a consortium that secured an exclusive contract to buy Pfizer's 3 million sq ft Research & Development Campus in Kent.

In 2013 Prorsus and Partners acquired the Private Sector half share in Harwell Campus.