VCs will negotiate on almost anything. But there’s one right they rarely give up.
Pro rata rights let an existing investor buy into your next funding round, so their percentage of the company doesn’t shrink as you raise more money.
Why do investors hold on so tightly? Venture returns come from a handful of breakout companies. Pro rata is how a fund keeps a meaningful stake in its winners, often at exactly the moment those companies become hardest to get into. Stanford’s Ilya Strebulaev calls it the least negotiable term in venture capital.
For founders, the takeaway is simple: expect investors to ask for it, decide early who gets it and on what terms, and remember that an existing investor exercising pro rata is one of the clearest signals of conviction you can bring to your next round.
Sources: Ilya Strebulaev, “Pro Rata Rights: The Least Negotiable Term in Venture Capital” (2026); Gompers, Gornall, Kaplan & Strebulaev, “How Do Venture Capitalists Make Decisions?” (Journal of Financial Economics, 2020); Faierman & Cotter, “Your Wikipedia for Pro Rata Rights” (2025); 20VC podcast with Keith Rabois.
