Check out the companies making headlines in premarket trading. Technology stocks — The group that was under pressure in Monday’s session bounced before the bell, trying to regain some of the lost ground. Nvidia and Palantir climbed more than 1% in Tuesday premarket trading, while AppLovin gained 0.7%. The three names were among the best performers of 2024. KB Home — Shares of the homebuilder jumped by more than 9% after fourth-quarter results topped estimates. KB Home reported $2.52 in earnings per share on $2 billion of revenue. Analysts surveyed by LSEG were expecting $2.45 per share on $1.99 billion of revenue. The company said home deliveries rose 17% year over year. Signet Jewelers — The parent company of Kay Jewelers and Zales tumbled 16% after lowering its fourth-quarter guidance. Signet said holiday sales were weak as consumers gravitated to lower price points. Teladoc Health — The virtual health care company’s stock jumped 4% in premarket trading after the company announced a partnership with Amazon . Teladoc said its diabetes, hypertension and weight-management programs will be available on the e-commerce’s platform. H & E Equipment Services — Shares soared more than 100% after United Rentals said it would acquire the rental equipment company. United, whose shares popped 2% before the bell, will pay $92 for each H & E share in cash. That values H & E at around $4.8 billion. Applied Digital — The digital infrastructure stock rallied 19.3% on news that Macquarie would invest as much as $5 billion in Applied Digital’s artificial intelligence data centers. Through the deal, Macquarie will take a 15% stake in Applied Digital’s high-performance computing business. Maplebear — Shares of the Instacart parent rose nearly 2% after receiving an upgrade to buy from neutral at BTIG. The firm pointed to accelerating order growth as a catalyst for growth. Additionally, Mizuho initiated coverage of the stock with an outperform rating, saying that its position in grocery delivery is “underappreciated.” Hesai — U.S.-listed shares of the Chinese automaker supplier jumped 6.4% following an upgrade to buy from neutral at Goldman Sachs. Analyst Tina Hou said that the market appears to have underestimated the operating leverage from Hesai’s new product cycle, and added that shares are currently trading at “attractive” levels. Celanese — The chemical manufacturer and supplier popped 2.7% following a rare double upgrade at Bank of America to buy from underperform. The bank said Celanese has an enticing valuation and should be able to see demand recover for most products. — CNBC’s Yun Li, Jesse Pound, Lisa Han, Sean Conlon, Michelle Fox and Sarah Min contributed reporting