Clark joined the team in June from M&G Investments, while Hall comes from Mondrian Investment Partners.
Both Hall and Clark will work on the $2.2bn (£1.8bn) Global Horizon strategy which targets global companies trading at a discount to their intrinsic value. They will report to head of global equities Louise Keeling who also manages the fund.
Clark spent five years at M&G, working his way up from graduate intern to a global equity analyst, covering a wide variety of sectors.
Hall worked at Mondrian as an equity analyst and managed its Emerging Markets Small Cap fund, focusing chiefly on Indian, Brazilian and Mexican markets.
Keeling said: “We are focused on pursuing an unconstrained and bottom-up investment approach that will help us deliver multi-year alpha to our clients.
“Benjamin and Nathanial share this belief and their insight and experience will be invaluable as we continue to uncover those under researched and unloved companies.”
Over a one-year scale, the RWC Global Horizon Fund has underperformed the IA Global Sector, with returns of 2.9% versus 5.6%, according to Trustnet. On a three-year view it has just outperformed the average peer returning 38.7% versus the sector’s 37.3%.
RWC Global Horizon launched on 26 November 2013 and has an annual charge of 0.80%.
The move saw Agilis founder Clark Fenton, along with colleagues Charles Crowson and Praveen Kanakamedala, joining RWC to form the RWC Diversified Return team.