Key Takeaways

  • Concentrated seed managers claim a 90% win rate on targeted deals, but David Tisch estimates the real figure is closer to 20%.
  • Modern growth rounds now take 3% to 8% dilution instead of the historical 12% to 20%, leaving early seed equity far less diluted by exit.
  • Rigid 10% to 20% ownership requirements force concentrated funds into adverse selection, backing secondary companies because true outliers picked someone else.
  • Outcome expansion to $10B+ valuations allows non-lead checks and low-ownership positions to return entire fund vehicles.

The Disagreement

Traditional venture capital teaches that seed funds must buy 10% to 20% of a company to generate acceptable returns. Harry Stebbings built his early investment philosophy around that standard. David Tisch built BoxGroup by breaking it, backing hundreds of startups with flexible, smaller ownership stakes.

Tisch argues that concentrated seed managers delude themselves about their own deal access: “Every concentrated manager will say that we win 90% of the deals we want to win. And I think that's total BS. I think it's like 20%.” In his view, insisting on a fixed 15% or 20% stake forces investors to walk away from elite teams who refuse to take heavy dilution. The investor then funds an inferior competitor just to hit a quota: “Just because you have 30 that you own 10% of, it doesn't mean those are the 30 that you would have liked to be in that portfolio.”

Stebbings acknowledged the blind spot in his historical model: “What I was wrong on very specifically, I think, is like not seeing outcome size expansion in the way that we have done. And that's very rigid minded of me, which is my fault, but it's enabled incredible returns from companies with smaller checks and not having ownership, so to speak.”

Who's Right (and When They're Wrong)

Tisch is right whenever outlier valuations outpace dilution models. Two structural shifts in startup finance make his math work. First, the ceiling on tech outcomes moved from $1B to $10B and beyond. Second, late-stage capital availability compressed mid-stage dilution. As Tisch noted, “They are raising these later stage rounds at 3 to 8% dilution instead of 12 to 20%. And if you take that across multiple rounds, your early stage investment just gets diluted less and that is an economic factor.” A 3% stake in an outlier company experiencing minimal dilution yields more cash than a 15% stake in a company that hits a wall at Series B.

Tisch's model breaks down when exit sizes normalize and capital markets seize up. If public market multiples contract and software companies exit at $500M instead of $10B, a 2% entry stake cannot return a $100M fund. Concentrated managers who own 15% survive in flat or down markets because they need far smaller exits to generate real dollars for their limited partners.

For founders, the tension is practical. When a lead seed investor demands 20% of your cap table, they are serving their portfolio math, not your business. If your company has genuine momentum, giving away a fifth of your equity in a single early round creates an uphill dilution battle before you ever reach Series A.

What to Do With This

Run a cap table simulation before signing your next seed term sheet. Model two dilution paths to exit: one where you sell 20% to a single lead, and one where you raise on rolling SAFEs selling 10% total to high-conviction angels and non-lead funds. If a lead investor insists on 18% or more, demand they justify the extra 8% dilution with specific hiring or customer intro commitments in writing.