Check out the companies making headlines in midday trading. UnitedHealth — The health insurer's stock popped roughly 7% as investors scooped up shares of the beaten-down name, which lost 23% last week. UnitedHealth had suspended its 2025 guidance, announced that its CEO is stepping down and is reportedly the subject of a U.S. Department of Justice investigation . Reddit — Shares of the social media stock dropped more than 4% following a downgrade to equal weight from overweight at Wells Fargo. The firm said search traffic disruptions at Reddit are likely to become lasting as Google's search integrates full artificial intelligence capabilities. Tesla , Palantir — Shares of retail investor favorites Tesla and Palantir each slid more than 3% as key tech stocks led Monday's stock market losses. Regeneron Pharmaceuticals — Shares of the drugmaker dropped about 1% after the company announced it had agreed to pay $256 million to buy most of the assets of genetic data company 23andMe out of bankruptcy. Regeneron's deal does not include Lemonaid Health, 23andMe's telehealth subsidiary. Bath & Body Works — Shares ticked 1% lower after the personal care retailer said CEO Gina Boswell would step down immediately. The company said former Nike executive Daniel Heaf would replace her. Alibaba — U.S.-listed shares of the Chinese e-commerce giant traded 1% lower after the New York Times reported that the Trump administration has raised concerns about Apple' s plan to use Alibaba's A.I. on iPhones in China. TXNM Energy — Shares of the energy company popped 7% after TXNM agreed to be acquired by Blackstone's infrastructure unit. TXNM Energy shareholders will receive $61.25 in cash for each share as part of the deal. — CNBC's Alex Harring, Jesse Pound and Michelle Fox contributed reporting.