Fast-growing fintech Pipe has raised another round of funding at a $2 billion valuation, just weeks after raising $50 million in growth funding, according to sources familiar with the deal. Although the round is still ongoing, Pipe has reportedly raised $150 million in a “massively oversubscribed” round led by Baltimore, Maryland-based Greenspring Associates. While the company has signed a term sheet, more money could still come in, according to the source. Both new and existing investors have participated in the fundraise. The increase in valuation is “a significant step up”…