SoftBank Group Corp. is planning to pump an extra $1 billion or more into WeWork by renegotiating a warrant agreement struck before falling valuations delayed the US office-sharing startup’s IPO, the Financial Times reported.

The plan would increase the Japanese firm’s initially planned investment of $1.5 billion in WeWork as part of the agreement, giving the US company the right to receive the money in April next year in exchange for Class A common stock.

SoftBank and its Saudi-backed Vision Fund are WeWork’s biggest backers and have already funneled more than $10 billon into the US company, including the promised $1.5 billion.

The potential new investment from SoftBank could unlock more financing options for WeWork, which is in talks for a $3 billion to $4 billion loan from a consortium of banks contingent on it raising additional capital, FT added.

A new deal would reduce the price per share at which SoftBank acquires WeWork stock, giving it a larger stake in the unprofitable property group, FT said Wednesday, citing people briefed on the matter. It was unclear how renegotiations would affect the Japanese group’s valuation of its investment, FT said.

WeWork declined to comment on the report. SoftBank did not immediately respond to a request for comment.

SoftBank invested in WeWork parent We Company at a $47 billion valuation in January, but investor skepticism led to a potential IPO valuation of as low as $10 billion earlier this month, Reuters reported.

The startup postponed its IPO last week, and on Tuesday, its co-founder Adam Neumann resigned as CEO, giving up the majority of his voting control after SoftBank and other shareholders turned on him.

WeWork appointed two insiders as co-CEOs and said Neumann will stay on the board as non-executive chairman.

We Company said it is evaluating the “optimal timing” for an IPO.