FirstMark Capital, a venture capital firm, led a $40m series D funding round in Justworks, a cloud-based software platform, with participation from Index Ventures, Thrive Capital, Bain Capital and Redpoint Ventures. “We are thrilled to start a new relationship with FirstMark Capital and are proud of our continued relationships with current partners. This funding is a major milestone for Justworks, and further proof of our accelerated success in our mission to give entrepreneurs and their teams the support and peace of mind to work fearlessly,” Isaac Oates, Justworks CEO and Founder.