In May, Path Robotics announced a $56 million Series B. It was a sizable raise, as far as robotics rounds go. But the Columbus, Ohio-based startup is already back for more, raising a “pre-emptive” Series C a mere two and a half months later.

And it’s a biggie. The firm has raised $100 million, led by Tiger Global and featuring participation from Silicon Valley Bank, an existing investor. The deal brings the robotic welding firm’s total funding to $171 million.