(Bloomberg) -- Ken Griffin’s flagship multi-strategy funds gained in February and they weren’t alone. Many of the hedge fund industry’s biggest multi-manager firms advanced, with Citadel’s Kensington and Wellington rising 1 percent, according to a person with knowledge of the matter. That pushed their showing for the first two months of the year to 4.55 percent. Citadel oversees about $29 billion in assets. Like Citadel, Izzy Englander’s Millennium Management counts on small teams of traders to manage money independently from one another.