“Lather, Rinse, Repeat”: FeedBurner's Serial Founding Team
The Private Firm CFO · Case 1 · Wed Sep 16, 2026 · Prof. Barrios
Four ventures, mostly the same people. What mistakes did they stop making?
Posted after the September 16 sections.
Vote tallies by section
You are Costolo: Google's offer, or the C round? Each section voted before discussion and again after the reveal.
Same case in three sections. Grade the reasoning you brought in, not the Google outcome.
Four ventures, one team
Click a venture for the one-line description. Open each board cell only after you have an answer ready.
The board: mistakes vs. best practices
- Partnered with near-strangers (DKA)
- Misaligned goals: lifestyle vs. growth
- No founder vesting
- Fourth venture, same proven team
- Roles defined up front
- Trust built over a decade = speed
- Hired friends and jacks-of-all-trades
- Too senior, too early
- Paid in promises
- A-player specialists at the right stage
- Known quantities from prior ventures
- Equity calibrated to stage
- No outside validation of the idea
- Raised from weakness → forced sale
- Took the only offer on the table
- Courted VCs before needing money
- Raised from strength; competitive round
- Kept control: board seats and terms
Financing is short here. Term sheets are Session 11.
The Founder's Pie calculator (Demmler)
Weight the factors, score the founders: weighted score = Σ(weight × score); share = weighted score ÷ team total. In class each section ran one weighting for 3 minutes. Here you can run all of them.
These founder scores are instructor stylizations. Argue with them.
What this weighting implies
Red line = equal split. This row is what the weighting implies: an input to a negotiation, not the answer.
Every section weighting lands near 28 / 25 / 28 / 19, not 25 / 25 / 25 / 25. FeedBurner still chose equal. Why?
- The model opens a negotiation. The scores are negotiable too.
- Equal is fast, and it signals trust on a team that already has history.
- Whatever the split, vesting and the 83(b) matter more.
Why static splits break: the Slicing Pie simulator
Dynamic splits let the pie settle itself: every founder's share = their cumulative at-risk dollars ÷ everyone's. Time goes in at market rate; cash at face; idea, relationships, and assets at priced dollar equivalents. a stylized team, not FeedBurner
Preset: market rate $75/hr for everyone; full-time = 500 hrs/quarter; Founder D drops to 25% of full-time hours from Q3. No cash or priced one-offs in the preset. Add your own in the $ rows.
Slicing Pie freezes at breakeven or first funding. Why freeze?
Sell or ride the curve?
Both columns were defensible. Memos were graded on reasoning, not on picking a side.
Take Google's offer
- Certainty: liquid, life-changing today
- Removes all financing risk
- Co-founders with less wealth need this more
- Fair price for current traction
- Integration risk: product loses independence
Take the C round
- Upside: ride the S-curve
- VC fund economics want the big outcome
- Dilution raises the exit bar
- Employees wait longer for liquidity
- Costolo can afford the risk. Can the others?
Where on the curve do you sell?
Click a marker. No numbers on these axes.
Exit threshold: same offer, different founders
stylized numbers, not the case's A certain offer against a risky continuation, valued with log utility over (existing wealth + your 25% stake's payoff). The two founders below differ only in wealth already in the bank.
First-exit founder (w ≈ $0)
Already-wealthy founder (w = $150M)
You, at the w slider's value
Same company and same numbers can produce different rational answers. The CFO's job is to put that conflict on the table.
Sold to Google, June 2007, ≈ $100M. Dick Costolo later became CEO of Twitter.
Easy to call after the fact. Score the reasoning you had before the reveal.
Rich vs. King, the day-one fixes, and what's next
Rich vs. King: the four ventures
The day-one fixes
Weigh idea, capital, opportunity cost, and future role. Set once, at founding.
Equity accrues with at-risk contributions over time. The split settles itself.
Teams that split equity equally, especially quickly, raised their first round at lower valuations. Hellmann & Wasserman trace most of that to differences between the teams: a fast, even split is a signal investors notice.
Founder vesting (4 years, 1-year cliff) and the 83(b) election. Sign them while the team still gets along.
Most mistakes on the left board have one fix: a contract signed on day one.
83(b) day-counter
The 83(b) election must be filed within 30 days of the grant. No extensions.
Takeaways
Team quality compounds across ventures. Protect it.
Equity splits are incentive design, not a fairness exercise.
Raise before you must. Sell from strength.
Exit decisions are portfolio decisions. Founders differ in wealth and risk.
Day-one contracts prevent year-three lawsuits.
Case 2 (Solstice Robotics) is next: vesting, 83(b), and the tax math. Packet on Canvas.