Check out some of the companies making the biggest moves at noon: Broadcom — The chipmaker soared 10% after agreeing with OpenAI to jointly build and deploy custom artificial intelligence accelerators. This is the first public plan announced by the two companies, which have been working together for 18 months to scale their AI infrastructure. Bloom Energy — The energy stock soared 30% after the hydrogen and natural gas generator maker entered into a $5 billion partnership with Brookfield Asset Management to install fuel cells in an artificial intelligence data center. Siena – The software maker soared more than 4% after BNP Paribas upgraded its share price from neutral to outperform. The investment bank also raised its price target to $185 from $120, implying a 19% upside from Friday’s closing price. Jefferies Financial Group – The investment bank rose about 3% after CEO Rich Handler sought to allay investor concerns about First Brands’ bankruptcy. Handler said in the letter that Jefferies could incur financial losses from its indirect investment in First Brands, but that the investment bank has sufficient liquidity to absorb the impact. Shake Shack — The burger chain added 4% after Jefferies received an upgrade to help it break out of a slump. Jefferies said the risk-reward ratio is more balanced following the recent share price decline. Estee Lauder — The Clinique and Origins cosmetics maker soared 5% after Goldman Sachs upgraded its shares to buy. The bank also called for a 30% rise in Estée Lauder’s stock, noting that it was approaching a fundamental inflection point. MARQUETA — The credit card issuing platform fell more than 5% after Goldman Sachs downgraded the company from neutral to sell and lowered its price target from $7.50 to $5. Wall Street banks are concerned that Marketa’s partnership with Block, which added a new issuer processing partner, will expire this earnings season. Rocket Lab — The rocket company rose 3% after Morgan Stanley raised its price target to the highest price on the street. The Wall Street company said the initial launch of the Neutron program will be the next big catalyst for the stock. U.S. Rare Earths — Shares of U.S. rare earth mining companies soared after President Donald Trump threatened retaliation over China’s strict export controls. U.S. rare earths soared more than 24%, critical metals rose more than 44%, energy fuels rose more than 18% and MP Materials rose more than 23%. FASTENAL — The industrial supplier fell 5% after missing Wall Street analysts’ quarterly profit expectations. Applied Materials — The semiconductor equipment maker rose more than 4% after buying at Bank of America. The analyst cited “the bullish multi-year outlook for Semi-Cap, an upstream beneficiary of large-scale data center deployments,” as the impetus for the upgrade. Bank of America’s new price target is $250, up from $180, implying a 19% upside. Yelp — The online business review site rose nearly 9% after Evercore upgraded its platform to outperform from inline and raised its price target from $37 to $45. Arcus Biosciences — The clinical-stage biotech rose nearly 9% after a drug trial showed improved survival rates for patients with gastrointestinal cancer. StubHub — The online ticketing platform rose about 4% after its initial public offering on Sept. 17 as bullish research coverage began on some Wall Street. Goldman Sachs, which rated StubHub a “buy,” said ticket agencies will continue to grow as consumers prioritize experiences over products. Sprouts Farmers Market — The specialty grocery store chain rose 5% after RBC Capital raised its investment rating on the battered stock, saying it could rise 44% from Friday’s close if same-store sales growth exceeds pre-pandemic levels. Warner Bros. Discovery — The owner of the HBO and CNN cable networks rallied more than 4% after Bloomberg News reported that WBD rejected a takeover offer by Paramount Skydance for about $20 a share and said the litigants could respond with a higher offer, make a hostile bid or find a partner, citing people familiar with the matter. — CNBC’s Elizabeth Napolitano, Lisa Kai-Lai Han, Spencer Kimball, Yun Li, Michelle Fox, Alex Harring, Michelle Fox and Fred Imbert contributed reporting. (Learn the best strategies for 2026 from inside the NYSE with Josh Brown and others on CNBC PRO Live. Tickets and information here.)
