SoftBank Group Corp agreed to acquire private equity firm DigitalBridge Group Inc in a deal valuing the data centre investor at $4bn including debt.The Japanese conglomerate will pay $16 per share in cash for New York-listed DigitalBridge, the companies said in statement Monday, confirming an earlier report by Bloomberg News. The acquisition is part of SoftBank’s push to invest in the digital infrastructure fuelling the artificial intelligence boom.SoftBank’s billionaire founder, Masayoshi Son, aims to capitalise on soaring demand for digital infrastructure, driven by the AI boom. The past year has seen a wave of multibillion-dollar deals in the space, largely focused on data centres and the computing power necessary to build and power the technology.The need for capacity has fuelled massive transactions, including BlackRock Inc’s $40bn purchase of Aligned Data Centers and Oracle Corp’s agreement to supply OpenAI with about 4.5 gigawatts of computing power worth as much as $300bn.DigitalBridge is one of the biggest investment firms focused on digital infrastructure, with about $108bn of assets under management at the end of September, according to its website.The deal represents a 15% premium to DigitalBridge’s closing share price on December 26, the companies said. The transaction is expected to close in the second half of 2026, pending regulatory approvals.Shares of DigitalBridge rose 45% on December 5, when Bloomberg first reported the talks to take the company private. It had a market value of about $2.5bn and an enterprise value of $3.8bn including debt as of Friday’s close, according to data compiled by Bloomberg.The deal will bring to SoftBank relationships with more investors keen to deploy money in the data centre industry. DigitalBridge is led by Chief Executive Officer Marc Ganzi and its portfolio includes digital infrastructure operators such as AIMS, AtlasEdge, DataBank, Switch Inc, Vantage Data Centers and Yondr Group.SoftBank has also held discussions with closely held Switch about a possible acquisition, which specialises in designing and operating energy-efficient data centres, Bloomberg reported this month, citing people familiar with the matter.While SoftBank’s most famous bets include Alibaba Group Holding Ltd, Arm Holdings Plc and WeWork, it has previously done deals in the asset management space. In 2017, it acquired Fortress Investment Group for more than $3bn. It later sold its stake to a group including Abu Dhabi sovereign wealth fund Mubadala Investment Co and Fortress management in a deal completed in 2024.In January, SoftBank announced the $500bn Stargate project, alongside OpenAI, Oracle and Abu Dhabi’s MGX, to build data centres in the US. While Son pledged to deploy $100bn “immediately,” the rollout of Stargate has been slower than planned, in part because of disagreements over where the data centres should be located.SoftBank initially sought project financing from outside investors including insurance companies, pension funds and investment funds. Some of the conversations dragged due to market volatility, uncertainty around US trade policy and questions about the financial valuations of AI hardware, Bloomberg News reported in May.SoftBank’s newest investment push has meant moving some funds around to free up capital. Son this month said he “was crying” over his need to sell a $5.8bn Nvidia Corp stake to reallocate the money to other AI spending.