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Marlinspike: The 21st Century Offset · Nov 18, 2025

Part II: Multi-Stage Fund Deployment Strategies Compared

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Marlinspike VC · Marlinspike: The 21st Century Offset

In Part II, we crunched the numbers to evaluate multi-stage fund strategies and the key drivers of returns. We compare a multi-stage fund returns with no concentration limits and standard 10% concentration limit. In addition, we discuss probabilities of generating returns for each strategy.

Assumptions

· Fund with no concentration limit is a $100 million fund.

· Our research indicates that most funds run a 10% concentration limit for their portfolio, this means a $26 million investment would require a $260 million fund.

· Both funds aim for 10% ownership and exercise their pro-rata after leading the Seed round.

· Exit is at a $2.6 billion valuation; the probability of achieving this exit is 0.1%.

Deployment and Return Analysis

As expected, funds with higher concentration limit generate higher fund-level returns. A closer look at deployment and returns at each stage gives us an interesting insight.

While both strategies increase their check sizes as the companies’ scale, fund-level returns are consistently 2.6x higher in every round for the No Concentration Limit strategy. Conceptually, strategies differ in philosophy: aggressive vs. play-safe.

ROI Probabilities

The probability of any single company achieving a valuation above $2 billion is approximately 0.1%. Just like the lottery — more companies in a portfolio increases the probability of investing in one. But unlike a lottery, this probability is dynamic, increasing as a company demonstrates momentum and traction; Follow-on investing is more akin to purchasing a ticket after several numbers have already been drawn.

The probability of having at least one company valued over $2 billion in a portfolio of 30 seed companies is under 3%; having at least two is 0.04%. Furthermore, 70–80% of companies fail to break out past Series A.

With probabilities like these, a good question arises: Are fund managers professional lottery players? Some obviously are; others are not. Consistent returns generated by managers would imply skill. In our minds, the key to generating consistent returns is:

· Having a thesis/view on where the world is going, and

· Understanding when to move chips towards the center.

A typical “spray and pray” model should, at best, deliver consistent market returns. However, venture is a game of upsized — not market — returns. For LPs seeking market returns, our advice is to invest in the S&P 500, a much safer bet. For market-beating returns, our recommendation is to invest in managers with the skill to identify breakout companies and execute a successful concentrated investment strategy.

Read the original on marlinspike.substack.com

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