Series E Round Led by Union Square Ventures and FirstMark Capital Brings Total Funding to $143 Million NEW YORK, January 28, 2020-- Justworks, the nation's fastest-growing HR technology company, today announced the close of a $50 million Series E investment. Union Square Ventures and existing investor FirstMark Capital led the round, which brings Justworks' total funding to $143 million. All other existing investors in Justworks, including Bain Capital Ventures, Index Ventures, Redpoint Ventures, Spark Capital, and Thrive Capital, also participated in the Series E. Founded in 2012, Justworks makes it easier to start, run and grow a business.