Also

* Pilgrim’s Pride Corp. said it would buy the chicken operations of ConAgra Foods Inc. for $590 million in cash and stock, which would make it the nation’s No. 2 chicken producer.

* Amylin Pharmaceuticals Inc., a San Diego drug maker seeking U.S. approval of its Symlin diabetes medicine, said it had named Ginger L. Graham chief executive and president. Current CEO Joseph C. Cook Jr. will remain as chairman of Amylin’s board of directors.

* Boeing Co. said it delivered 23 commercial jets in May, down 30% from a year earlier, amid shrunken demand from cash-strapped airlines.

* R.J. Reynolds Tobacco Holdings Inc. said Chief Financial Officer Richard Bogan has resigned after less than a year in the post. Bogan, 52, left to pursue other business opportunities, the company said.