The Billion-Dollar Seed Isn't The Deal You Think It Is
Despite attention-grabbing AI mega-seed rounds, historical data shows that very large first financings rarely produce venture-scale returns because high entry valuations limit investor upside. Instead, argues guest author Ellie McDonald, the strongest venture outcomes have typically come from capital-efficient startups that raised modest early rounds. Guest Author By Ellie McDonald Everywhere you look, venture headlines imply that seed rounds have meaningfully changed shape.
Key Takeaways
- Yann LeCun raised $1 billion for a company that didn't exist a week earlier.
- and a very long tail of modest ones.
Our experience with this trend in biotech motivated us to compile a dataset and pressure-test our intuition more broadly.
- But even there, the return math is nuanced for first round investors.
According to reports, first-round investors are looking at 30-40x returns at OpenAI's projected IPO valuations.
- Those historical investors got in at a price that left room for the upside to actually compound.
The mega round is real, but not replacing the market The number of $50 million-plus seed rounds has exploded since 2018.
- Cursor at less than $10 million is the more representative data point.
Stats & Key Facts
- #Yann LeCun raised $1 billion for a company that didn't exist a week earlier.
- #Unconventional AI hit $475 million two months after founding.
- #Biotech mega-seeds are common because the science requires it, you can't run a Phase 1 trial on $3 million, but the return profile is often humbling.
- #We pulled every publicly available $100 million-plus first round we could find over the last 15 years (roughly 200 deals) and found that only 20% had recorded exits.

It's easy to read those headlines and conclude the venture model has been rewritten, that AI is a once-in-a-generation opportunity requiring once-in-a-generation capital. The biotech parallel At Bison Ventures , we've built deep domain expertise in biotech, the sector with the longest history of mega first rounds in venture. Biotech mega-seeds are common because the science requires it, you can't run a Phase 1 trial on $3 million, but the return profile is often humbling.
Large first rounds in biotech have produced a handful of strong outcomes for first-check investors ... and a very long tail of modest ones. Our experience with this trend in biotech motivated us to compile a dataset and pressure-test our intuition more broadly.
We pulled every publicly available $100 million-plus first round we could find over the last 15 years (roughly 200 deals) and found that only 20% had recorded exits. Of those, only a few delivered what we'd call a venture-like return: 10x MOIC or better for the first-round investor. In other words, approximately 1% of companies that publicly raised $100 million or more in their first financing round generated returns that justify the asset class.
For more details please read the original article at Crunchbase News.
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