he board of Ullico, a union-owned insurance company, has named James R. Thompson, the former Illinois governor, to investigate the private sale of company stock that resulted in big profits for its directors. After a stormy meeting that ended late Monday in Washington, the directors unanimously voted to have Mr. Thompson review the sales, which have badly embarrassed the labor movement and the presidents of several prominent unions. A federal grand jury in Washington is investigating whether Ullico's sale and subsequent repurchase of its stock enabled several union presidents on its board to enrich themselves improperly at the expense of...