Monzo CEO Tom Blomfield. Photo by Noam Galai/Getty Images for TechCrunch, via CC BY 2.0 license

British fintech Monzo is in funding talks with SoftBank according to a report from British newspaper The Telegraph. The Telegraph says Monzo CEO Tom Blomfield has twice met with senior executives from the SoftBank Vision Fund, citing unidentified sources. The report comes shortly after Monzo, which has already raised more than $400 million in funding, was reported to be readying additional funding.

Monzo’s last raise was a £113 million (roughly $148 million) investment led by Y Combinator Continuity in June last year. That investment valued the five-year-old British fintech at £2 billion ($2.5 billion) post-money.

Monzo’s last raise coincided with a limited launch in the U.S., where it’s looking to as the next frontier for its digital banking service after amassing more than 3.7 million users in the U.K. Its U.S. launch was limited, with only a few thousand slots available in limited areas. This is being done in preparation for a wider rollout.

Monzo has raised funding from U.S. investors such as Stripe, Accel, Thrive Capital, and General Catalyst.