Co-Founder Leaving: What Happens to Their Equity?

A cofounder departure is one of the most stressful events in a startup's early life. Beyond the operational disruption, there's an immediate equity question: what happens to their shares? Without proper planning, a departed cofounder can retain a large ownership stake while contributing nothing — a problem that complicates fundraising and demoralizes the remaining team.

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Unvested vs. Vested Shares: The Fundamental Distinction

If the departing cofounder has a vesting schedule, only their vested shares belong to them at departure. Unvested shares typically return to the company (or are cancelled) — which is the whole point of vesting. A cofounder who leaves before the one-year cliff with no vesting agreement owns whatever percentage was written into the shareholders' agreement on day one: often 25-50% of the company. This is why establishing vesting at incorporation, not later, is essential.

25-50%of the company a cofounder can walk away with if they leave before the one-year cliff and no vesting agreement was ever put in place.

Good Leaver vs. Bad Leaver Clauses

Most investor-backed companies have good leaver / bad leaver provisions. A good leaver (someone who resigns voluntarily with reasonable notice or is made redundant) typically keeps their vested shares. A bad leaver (dismissed for cause or a competitor violation) may forfeit all or part of their vested shares. These distinctions need to be in the cofounder agreement before anyone leaves — not drafted in reaction to a departure.

Good leaverBad leaver
Typical definitionResigns voluntarily with reasonable notice, or is made redundantDismissed for cause, or in violation of a competitor clause
Vested sharesTypically keptMay be forfeited in whole or in part
Unvested sharesReturned to the company or cancelledReturned to the company or cancelled

Definitions vary by agreement — these are the common patterns in investor-backed companies.

Buyback Rights and Fair Market Value

Even if the departing cofounder keeps their vested shares, the company or other founders often want the right to buy them back rather than leaving an inactive shareholder on the cap table permanently. Buyback clauses typically allow the company to purchase vested shares at fair market value within a defined window. A departed cofounder holding permanent equity with no obligations creates governance issues and makes future investors nervous.

An inactive shareholder is a fundraising problem

Even vested shares can be repurchased if a buyback clause exists — typically at fair market value within a defined window. Without one, a departed cofounder sits on your cap table permanently, with no obligations and full upside.

Updating the Cap Table After a Departure

Once shares are cancelled or bought back, the cap table needs to reflect the new reality: all remaining shareholders' percentages shift upward. Equafy handles these adjustments through its share issuance and revert features — each action is logged in the audit trail, so the cap table always reflects the current ground truth with a clear history of what changed and when.

A departure is a cap table event, not a rewrite

When shares are cancelled or bought back, every remaining shareholder's percentage shifts upward. Equafy handles the adjustment through share issuance and revert, and logs each action in the audit trail.

Frequently Asked Questions

Protect your cap table from day one.

Equafy tracks vesting, manages contributor status, and keeps a full audit log — so a cofounder departure doesn't become a cap table crisis.

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