SoftBank Group is finalizing nearly $21 billion in potential additional borrowing to expand financing for artificial-intelligence investments. The company increased its margin loan secured by Arm Holdings shares from $20 billion to $25 billion, added $450 million to existing credit facilities to reach $6.5 billion, and plans to seek a further $10 billion to $20 billion through a large bond transaction next week, Bloomberg reported, citing people familiar with the matter.