The company has also hired George Crowdy from Janus Henderson to co-manage the fund with Mike Fox, head of sustainable investments at RLAM.
Mr Crowdy worked for 10 years at Janus Henderson and was a member of its Global Sustainable Equity team.
The company says the new fund has a concentrated and active portfolio of 30 to 50 stocks.
It will use the MSCI ACWI Investable Market Index (ACWI) as a benchmark and is aimed at wholesale and institutional clients looking for exposure to global equity investments.
Mike Fox, head of sustainable investments at RLAM, said: “The new fund is a natural evolution of our sustainable proposition and will enable us to widen the universe of companies that we can invest in, to include emerging markets too.”
To be included in the fund, investments must provide products and services that benefit society or be a leader in managing their environmental, social and governance (ESG) impacts.
RLAM currently manages £4.4bn in its sustainable fund range The funds previously belonged to The Co-operative Asset Management (TCAM) which was acquired by RLAM in 2013.