Premarket Movers | Confluent Rockets 27%; iRobot Soars 12%; Carvana Pops 9%, CRH Rises over 6% After S&P 500 Inclusion; DXYZ Advances 7%; Marvell Falls 3%

IBM is in advanced talks to acquire data infrastructure company Confluent for about $11 billion, the Wall Street Journal reported on Sunday, citing people familiar with the matter. Confluent shares surged about 27% on the news in premarket trading.

Shares of Carvana Co. rallied 9% in premarket trading. Carvana and two other companies will join the S&P 500 in about two weeks, S&P Dow Jones Indices said late Friday - dashing the hopes of those investors who expected bigger tech names or a crypto giant to get the honors this time around.

Joining the online used-car retailer on the premier U.S. stock-market index SPX are building-materials maker CRH PLC as well as Comfort Systems USA, which provides mechanical and electrical services for commercial and industrial buildings. Shares of CRH rose 6.6% in premarket trading.

The changes are scheduled to be in place before the market open on Monday, Dec. 22, S&P Dow Jones Indices said. A place in the S&P 500 is a coveted spot for companies as it exposes their shares to a much broader range of investors, including passive funds that track the equity benchmark and actively managed funds that may have restrictions on where they can invest.

The moves are part of a regularly scheduled quarterly rebalance for the index. Contenders for joining the S&P 500 included bitcoin-treasury company Strategy, chip maker Marvell Technology and social-media platform Reddit.

Shares of iRobot rose over 12% in premarket trading following a report that the Trump administration is working on accelerating development of the robotics sector.

SpaceX is planning a secondary share sale that would value it at $800 billion, the Wall Street Journal reported on Friday, citing people familiar with the matter. SpaceX was valued at about $400 billion after its last share sale. Destiny Tech100 Inc jumped 7% on the news in premarket trading.

Baidu rose over 2% in premarket trading as it assesses spin-off and listing of cip unit Kunlunxin.

Broadcom stock rose over 1% while Marvell fell over 3% in premarket trading after Microsoft is in talks to shift its custom chip business to Broadcom from Marvell.