Also

* Cereal maker Kellogg Co. said it shifted the roles of its top executives, promoting its U.S. division head to the new post of chief operating officer to let Chief Executive Carlos Gutierrez pull back from day-to-day operations. The Battle Creek, Mich., company said it named David Mackay to the post, which will oversee the company’s U.S. and international operations. Mackay had headed the U.S. division since 2000.

* General Motors Corp. said it would begin seeking shareholder approval early next month for the planned split-off of its Hughes Electronics Corp. subsidiary. GM plans to sell its 19.8% stake in Hughes, the parent of DirecTV, to Rupert Murdoch’s News Corp. Murdoch’s company agreed in April to acquire control of Hughes in a $6.6-billion cash and stock deal.

* Big City Radio Inc., which has sold 11 of the 12 radio stations it owned, said its board had decided to liquidate assets and repay the Los Angeles-based company’s debt.