LONDON—BP added more than a billion dollars to its share buyback programme on Tuesday as it likened itself to a “cash machine” benefiting from higher oil and gas prices and a strong trading performance in the third quarter. Natural gas and power prices around the world surged this autumn as tight gas supplies collided with…

Qualcomm Inc. on Tuesday announced a new $10 billion stock buyback, effective immediately. The repurchase will add to the company’s stockbuyback program announced in July 2018, which has $900 million of repurchase authority remaining.

Canadian National Railway Co. said on Friday it would resume a previously approved share buyback, days after walking away from its $29.6-billion deal for U.S. railroad operator Kansas City Southern. The largest Canadian railroad expects to complete the remaining C$1.1 billion ($869.02 million) of share repurchases by the end of January next year, it said…

Microsoft Corp. shares rose 1 percent in early trading on Wednesday after the company announced a $60 billion share repurchase plan, its biggest ever. The announcement comes just days after two U.S. Senate Democrats unveiled a proposal to tax corporate stock buybacks to help fund President Joe Biden’s $3.5 trillion investment plan. The senators said…