Since 1996, Van Otterloo has not had a day-to-day money management role and is considered retired while Mayo left in December 2001 to run a hedge fund, Game Creek Capital with his son.

[2][3] Grantham drove investment strategy using his quantitative background to create both equity and bond funds that run on models to make bets when asset prices deviate from historical means.

[2][3][4][5][6] GMO generally follows the investment philosophy of Graham which believes that all asset classes and markets will revert to mean historical levels from highs and lows.

In 1994, GMO acquired a fund established by Bill Nemerever and Thomas Cooper that focused on buying defaulted bank loans and Brady Bonds.

[6][13][14] In January 2023, GMO put out a statement that it believes the next leg of resurgence will come from deep value stocks which are the cheapest ones based on their valuation multiples.