Their about page [1] provides a good clue. > TLM, Inc. dba Robert McNeel & Associates is a closely held employee-owned Washington corporation funded solely fro

Their about page [1] provides a good clue. > TLM, Inc. dba Robert McNeel & Associates is a closely held employee-owned Washington corporation funded solely from retained earnings. So they're a private, employee owned company with a strong niche product that doesn't depend on outside money. They took the slow road, something that is antithetical to VCs but perfectly acceptable for bootstrapped founders that want to live comfortably but don't care about striking it rich. [1] https://www.rhino3d.com/mcneel/about/ https://www.rhino3d.com/mcneel/about/