M33 Growth, a Boston-based growth-stage investment firm, completed the investment in O3 Solutions, a construction project management software provider. Financial terms were not disclosed. "The M33 Growth investment validates the growing demand for Construction Project Management software and shows confidence in O3's growth plans. When searching for an investment partner, we made it a priority to find a firm that had a track record of accelerating growth with leading software businesses focused on growth, client-success, and innovation. With their extensive experience in construction software, M33 is the perfect fit for O3's growth and future," Josh Girvin, O3 CEO and Co-Founder.