Michelle Celarier After Its ‘Toughest Period’ Ever, AQR Is Making a Big Comeback “The first three months of 2021 have made for one of the strongest starts to a year we have had in our history,” co-founder Cliff Asness says. Michelle Celarier April 28, 2021 Cliff Assness, co-founder of AQR Capital Management. (Patrick T. Fallon/Bloomberg)