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%. Stanley Black & Decker — The toolmaker’s stock rose nearly 5% after it agreed to sell its aerospace manufacturing business to Howmet Aerospace for $1.8 billion. Stanley will use the proceeds primarily to pay down debt. Howmet shares are up almost 2%. Janus Henderson — Shares of the fund manager rose 3% after agreeing to be acquired by Trian Fund Management and General Catalyst. The deal is expected to close in mid-2026. Tesla — The electric vehicle maker’s stock rose nearly 3% after the Delaware Supreme Court on Friday overruled a lower court’s decision to void Elon Musk ‘s controversial pay package, which includes 300 million stock options. Tesla shares have been outperforming other “Magnificent Seven” stocks month to date, with a nearly 15% gain so far in December. First Solar — Shares of the solar energy company spiked nearly 6% after Alphabet said it would acquire Intersect for $4.75 billion in cash and debt. First Solar is a supplier of solar modules to Intersect. Clearwater Analytics — The investment management platform builder rose 8% after agreeing to be acquired by private equity firms Permira and Warburg Pincus for $8.4 billion, including debt. The deal is expected to close in the first half of 2026. Honeywell — The industrial giant fell more than 1% after it said in a regulatory filing that it expects to take a one-time charge in the fourth quarter that would lower GAAP sales by $310 million and operating income by $370 million. The charge is tied to settlement talks with Flexjet. — CNBC’s Darla Mercado, Fred Imbert, Sean Conlon and Michelle Fox contributed reporting.
