SoftBank Group is in talks to acquire the 25% stake in Arm it does not directly own from Vision Fund 1 (VF1), a $100 billion investment fund it raised in 2017, according to people familiar with the matter, potentially delivering a win for investors who have waited years for strong returns.

The discussions come as SoftBank, which currently owns 75% of Arm, is preparing to list the chip designer on Nasdaq next month at a valuation of $60 billion to $70 billion.

If the negotiations lead to a deal, the Japanese tech investor would be delivering a major, immediate windfall to VF1 investors, including Saudi Arabia¡¯s Public Investment Fund and Abu Dhabi¡¯s Mubadala. They nursed losses after many of SoftBank¡¯s bets on startups such as workspace provider WeWork and ride-sharing firm Didi Global soured.