Shares of Krispy Kreme (DNUT) surged after the company said it has reached a deal to sell its doughnuts at McDonald's (MCD) restaurants across the U.S. The doughnut maker's stock jumped 28% to nearly $16 in recent trading. McDonald's said it will start rolling out the doughnuts in the second half of this year and they will be available all over the country by the end of 2026. McDonald's had already started trialing the rollout of Krispy Kreme donuts at some locations.