The single most common mistake I see early-stage investors make is not in their initial investment decisions. It is in what they do — or fail to do — after those decisions. The initial check is the beginning of the relationship, not the end of the analysis. And the investors who generate the best long-term returns are almost always the ones who have built a disciplined, systematic approach to following on in their best companies.
The single most common mistake I see early-stage investors make is not in their initial investment decisions. It is in what they do — or fail to do — after those decisions. The initial check is the beginning of the relationship, not the end of the analysis. And the investors who generate the best long-term returns are almost always the ones who have built a disciplined, systematic approach to following on in their best companies.
This is the reserve strategy problem. And it is one of the most consequential — and least discussed — aspects of venture portfolio construction.
The Reserve Allocation Question
Every venture fund faces the same fundamental tension: how much capital to deploy in initial investments versus how much to hold in reserve for follow-on rounds. The conventional wisdom is to reserve roughly 50% of fund capital for follow-ons. But the conventional wisdom is wrong — or at least, it is far too imprecise to be useful.
The right reserve allocation depends entirely on your portfolio construction philosophy and your ability to identify your winners early. A fund that makes 30 initial investments and follows on in all of them is doing something very different from a fund that makes 30 initial investments and follows on aggressively in the 5 or 6 that show the clearest signs of outlier potential. Both strategies can work. But they require very different reserve allocations and very different decision-making processes.
The Kauffman Fellows research on follow-on strategy found that the most successful funds were not the ones with the highest follow-on rates. They were the ones with the most selective follow-on strategies — the ones that concentrated their follow-on capital in their best performers rather than spreading it evenly across the portfolio.
The Sunk Cost Trap
The reason most investors get follow-on strategy wrong is the sunk cost fallacy. When you have invested in a company, you have an emotional stake in its success that is independent of its actual prospects. The investment represents not just capital but judgment — and admitting that a company is not going to work means admitting that your initial judgment was wrong.
This emotional dynamic leads to a predictable pattern: investors follow on in companies that are struggling, hoping to protect their initial investment, while failing to follow on aggressively in companies that are working, because the valuation has increased and the investment feels less exciting than it did at the seed stage.
This is exactly backwards. The company that is struggling is the one where additional capital is least likely to produce a return. The company that is working is the one where additional capital has the highest expected value — because you already have evidence that the team can execute, the market is real, and the product is resonating.
Ilya Strebulaev, a professor at Stanford's Graduate School of Business who has studied venture capital extensively, describes this as the "double down or quit" principle: the right response to a portfolio company is either to invest more aggressively because the evidence supports it, or to accept the loss and move on. The worst response — and the most common one — is to continue making small, defensive follow-on investments in companies that are not working, draining reserve capital that could be deployed more productively elsewhere.
Reading the Signals
The practical challenge of follow-on strategy is identifying which companies deserve aggressive follow-on investment and which do not. This requires a different kind of analysis than the initial investment decision — less about potential and more about evidence.
The signals I look for when evaluating a follow-on decision are different from the signals I look for at the seed stage. At the seed stage, I am asking: is this founder the right person to solve this problem? Is the problem real and large? Is the proposed solution genuinely novel?
At the follow-on stage, I am asking: has the company demonstrated the specific capabilities that matter most for the next phase of growth? Has the team shown that it can hire? Has the product shown that it can retain? Has the go-to-market motion shown that it can scale? These are questions about execution, not potential. And the answers are available in the data — if you know what to look for.
The most important signal, in my experience, is the quality of the team the founder has built around themselves. The seed-stage company is almost entirely a function of the founding team. The Series A company is a function of the founding team plus the first ten or fifteen hires. The quality of those hires — their caliber, their retention, the speed at which they were recruited — is one of the most reliable leading indicators of whether a company is on a trajectory toward outlier outcomes.
The Pro-Rata Right as an Asset
One of the most undervalued assets in a venture investor's toolkit is the pro-rata right: the contractual right to invest in future rounds at your ownership percentage. For investors who have identified their winners early, the pro-rata right is extraordinarily valuable — it gives you the option to maintain your ownership in a company that is compounding in value, at a price that is still below what the market will eventually pay.
The investors who understand this treat their pro-rata rights as a portfolio within a portfolio. They are not exercising every pro-rata right — that would be indiscriminate and capital-inefficient. They are exercising the rights in their best companies, concentrating capital where the evidence of outlier potential is strongest.
This requires discipline. It requires the willingness to let some investments go — to accept that you made a good initial bet that did not work out, and to move on without throwing good capital after bad. And it requires the conviction to put meaningful capital into your winners even when the valuation has increased and the investment feels less exciting than it did at the seed stage.
The Compounding Effect
The long-term effect of a disciplined follow-on strategy is compounding ownership in your best companies. The investor who makes a $500,000 seed investment and follows on at Series A, Series B, and Series C in a company that eventually goes public at a $5 billion valuation has a very different outcome than the investor who made the same initial investment but did not follow on.
This is the mathematics of venture portfolio construction at its most concrete. The initial investment gets you in the game. The follow-on strategy determines how much of the game you own when it matters.
The best venture funds in the world — Sequoia, Benchmark, Accel — are not just great at finding companies. They are great at following on in their best companies, maintaining meaningful ownership through multiple rounds of dilution, and arriving at the exit with a position that reflects the full value of their early conviction.
That is the reserve strategy. That is how you build a great fund. And it starts not with the initial investment, but with the discipline to double down on your winners — and the honesty to walk away from everything else.
Jay Keller is the co-founder of Keller Winston and the founder of Onyx IQ.
