SoftBank Group Corp. secured an additional $450 million to increase the size of an existing credit line to $6.5 billion, people familiar with the matter said, giving the Japanese conglomerate more financial flexibility as it expands investments in artificial intelligence.

SoftBank Group Corp. is closing out the week with nearly $21 billion in potential fresh borrowings as it builds out its artificial intelligence financing capacity. It’s also looking to raise another $10 billion to $20 billion next week in a separate jumbo bond deal.