A brokerage firm may buy more Kaiser stock.

Jamie Securities of New York, which has a 5.89% stake in Kaiser Aluminum & Chemical of Oakland, said it asked the Federal Trade Commission and the Department of Justice for clearance to buy more Kaiser shares. In a filing with the Securities and Exchange Commission, Jamie said it may buy Kaiser stock for investment purposes. Jamie said it doesn’t intend to seek control of Kaiser but reserved the right to do so. Jamie was an ally of the Frates group in its recent unsuccessful attempt to oust Kaiser’s board of directors.