Out of six products rated, the Zurich Investments Global Thematic Shares and Hedged Global Thematic funds were the only ones given five stars by the research house.
The DWS Investments Global Equity Agribusiness, Global Equity Thematic and Global Equity Thematic Fully Hedged funds all gained four-star ratings.
Platinum Asset Management's Unhedged Fund was also rated four stars.
"The ratings stability for this peer group reflects its high quality, with very experienced investment teams focused on thematic investing," S&P fund analyst Tom Mills said.
"In our view, managers in this peer group produce in-depth, high-quality research.
"They have specialised processes to identify and define top-down investment themes, but also conduct extensive bottom-up company analysis."
Specifically, Mills said the Lazard Asset Management team that ran the two Zurich funds was very stable and highly experienced.
"The team has implemented its thematic investment approach continually since 1986, building an extremely strong track record, and we believe the team has the necessary skills to continue to identify and exploit future trends," he said.
