PT1 is a venture fund focused on the physical world—infrastructure resilience, electrification, and AI/robotics for industrial systems—and it treats its investors as more than passive backers, connecting portfolio companies to a capital base of billions of dollars while also being willing to co-lead early rounds of up to €4 million in hard-tech and real-asset categories where many seed funds stay cautious. The firm stays involved beyond the first check, having helped its portfolio of just over 30 companies secure more than €1 billion in follow-on funding, and its founder has argued that proptech's relatively low levels of venture funding can actually lead to more disciplined companies and more rational markets.