Varian Associates announced that its board of...

Varian Associates announced that its board of directors has authorized the repurchase of up to 2 million of its about 22 million outstanding shares . . . Sun Co. said its shareholders overwhelmingly approved a measure aimed at preventing the nation’s 10th-largest oil company from being “greenmailed” by a corporate raider . . . Tenneco said it has completed its purchase of the French, German and Danish farm-equipment subsidiaries of International Harvester . . . The Investment Company Institute reported that the assets of the nation’s 345 money-market mutual funds rose $1.8 billion in the week ended May 8.