Check out the companies making the biggest moves before the bell: Confluent – The Wall Street Journal published a report Sunday that said IBM is in advanced talks to close an $11 billion deal to acquire data infrastructure company Confluent, pushing the latter’s stock price up 27%. Broadcom — The chipmaker rose more than 2% after The Information reported that Microsoft is in talks to move its custom chip business from Marvell Technology to Broadcom. Marvell stock fell 6%. Lumentum Holdings — Shares of the optical and photonics products maker rose 4% after announcing the extension of a strategic agreement with British semiconductor company IQE. Carvana, CRH — Ireland-based manufacturer CRH and automotive e-commerce platform Carvana will join the S&P 500, S&P Dow Jones Indices announced Friday. This change is expected to take effect before the start of trading on December 22nd. CRH rose 7% and Carvana rose nearly 9%. Berkshire Hathaway — Warren Buffett’s conglomerate has announced the departure of investment director and Geico CEO Todd Combs. He will join JPMorgan Chase as head of the bank’s new security and resiliency initiative to find direct equity investments. Berkshire also announced several other structural changes before its legendary CEO steps down at the end of this year. Shares rose slightly in premarket. CoreWeave — Shares of the cloud AI company fell nearly 6% after announcing a $2 billion convertible debt offering. Five Below — The discount retailer rose more than 2% after Trust Company upgraded it to hold-from-buy. “We believe the stock has room for further upside given the sustainability of the company’s performance and the potential for earnings growth,” the company wrote about Five Below. —CNBC’s Yun Li contributed reporting.
