Crypto startup Circle, the company behind USD Coin (USDC), raised $440M in a funding round and the company is said to be considering a SPAC transaction.The funding round included investors such as Fidelity, FTC, Digital Currency Group, Marshall Wace, Valor Capital and others, according a report from The Block. The company is targeting a valuation of $4B.The latest funding round follows a $25M investment last July led by Digital Currency, according to a Coindesk report. The report said that Circle had raised $246M over seven funding rounds with Digital Currency having been an investor since early 2014.In late March, Visa said it will start allowing transaction settlement in USDC stablecoin.