TPG Capital, a private equity firm, led a $300m Series F round in Acorns, an Irvine, California-based FinTech startup, with participation from Bain Capital, BlackRock, Galaxy Digital and Thirty Five Ventures. Acorns specializes in micro-investing and robo-investing. Following the transaction, the savings and investing app is valued at $1.9bn, more than double its last valuation, according to Acorns CEO Noah Kerner.