A cofounder who quits right after a round leaves two problems, not one: their equity, and what the timing does to investor trust. Check the vesting schedule first, since that decides whether they leave with a small stake or a large one. Then call your lead investor before they hear it elsewhere.
Why is this timing the worst version of a departure?
Because investors just priced the company on the assumption that both of you were staying. A cofounder exit soon after closing raises a question nobody wants to ask out loud: was this already brewing during diligence, and did the pitch reflect it. Cap table platform Carta tracks this pattern directly, noting that a cofounder who walks away with a large slice of equity after limited time on the team sharply reduces a startup's odds of raising again, per its research on cofounder departures. The equity problem and the trust problem feed each other.
What actually happens to their equity?
Start with the vesting schedule, not the conversation. A standard setup is four years with a one-year cliff:
| Timing of departure | Typical outcome |
|---|---|
| Before the one-year cliff | Unvested shares forfeited; departing founder often keeps nothing |
| After the cliff, mid-vest | Unvested portion forfeited; vested portion usually stays with them |
| Fully vested | Full stake stays with them unless the company has a buy-back right |
Without a vesting schedule, or with one that already fully vested, a departing founder can keep a meaningful stake while contributing nothing going forward. That stake is what the industry calls dead equity, and it is exactly what spooks the next round. See what happens to equity when a cofounder leaves for the full mechanics, and dead equity for why investors treat it as a red flag rather than a formality.
A buyback is one way to close the gap, but it only works if your shareholders' agreement actually gives the company that right. Absent that clause, you are negotiating from a weaker position: the departing founder can simply decline, and there is no mechanism forcing a sale. That is why the clause belongs in your documents before anyone leaves, not after.
Does the investment round itself add new terms?
Often, yes. The documents from the round you just closed can sit on top of your original vesting terms. A UK law firm's rundown of founder fall-outs notes that the investment agreement from the last round, together with each founder's own service agreement, can add restrictive covenants such as a non-compete that apply in addition to whatever your founders agreement already says, according to its lifecycle-of-a-startup series. Read the round's documents, not just your original cap table agreement, before you tell the departing founder what they can and cannot do next.
What do you tell investors, and when?
Immediately, with a plan already forming. Investors can sit with a founder leaving. What damages the relationship is finding out from someone else, or sensing that the raise closed on a story that was already going stale. Lead with who is covering the departing founder's work and by when, then let the equity conversation follow once the plan is clear.
If the departure follows a disagreement that was never actually settled, rather than a clean change of plans, that is the problem worth fixing before it repeats with whoever takes their place. A Conflict Session gives both sides a structured way to name what happened and agree what changes, instead of letting it surface again as another sudden exit. Start with our cofounder conflict resolution guide for the wider picture.
Frequently asked questions
- What happens to equity when a cofounder quits right after a raise?
- It depends entirely on vesting. Unvested shares are usually forfeited back to the company. Vested shares typically stay with the departing founder, which is where a large, unearned stake comes from. Check your stock purchase agreement before you assume either outcome.
- Why do investors care so much about timing after a raise?
- Because they just priced the company on the assumption that both founders would keep building. A departure days or weeks later raises a real question: did one of you already know this was coming during the raise, and did the round's story reflect that.
- Can a company buy back a departing cofounder's vested shares?
- Only if the shareholders' agreement gives it that right, and usually at a negotiated price, often tied to the last round's valuation if there is no more recent one. Without a repurchase clause, the departing founder keeps their vested stake and a buyback has to be negotiated from scratch.
- Should I tell investors right away if my cofounder wants to leave after we just raised?
- Yes. Investors who just funded the company will find out anyway, and a delay reads as if you were hiding something during diligence. Bring a plan for covering the work, not just the news, and have an honest answer ready for why this surfaced now.