Check out the companies making the biggest moves in midday trading: Dominion Energy — The energy company’s shares fell nearly 5% after the Trump administration halted five East Coast wind projects, including Dominion Energy’s Coastal Virginia Offshore Wind, the largest project of its kind in the U.S. Maplebear — The Instacart parent’s stock fell more than 3% after it said it would end the use of artificial intelligence-driven pricing tests for its grocery platform. The pricing tests had caused some customers to pay more for identical items in the same store than other customers. Warner Bros. Discovery — Shares rose 3% after Paramount Skydance said it guaranteed Larry Ellison would back an amended offer for the HBO parent. Warner Bros. has already accepted an offer from Netflix . Paramount shares jumped 5%, while Netflix stock fell less than 1%. Rocket Lab — The aerospace stock rallied 10% after Rocket Lab was awarded an $816 million contract to build a missile-defense satellite system for the U.S. Space Force. UniFirst — Shares popped about 18% after Cintas submitted a bid to acquire the workwear company. Cintas is making an offer of $275 per share in cash , implying a total value of about $5.2 billion and representing a 64% premium to UniFirst’s 90-day average closing price as of Dec. 11. Cintas shares advanced about 3%. …
