Co-Founder

TL;DR

An additional founder who joined at or near the company's inception, typically holding founder common stock and a meaningful equity stake.

A co-founder is one of multiple founders. Most VCs prefer co-founder teams over solo founders because of risk, complementary skill sets, and the resilience the partnership provides during difficult periods. Common co-founder splits include CEO + CTO, CEO + CTO + COO, or other complementary configurations.

Co-founder agreements should establish equity splits, vesting, decision rights, and exit provisions before there's any reason to argue. The most common cause of early-stage failure is co-founder conflict.

Worked example

Two co-founders split equity 50/50 at incorporation, both vest over 4 years with a 1-year cliff and full mutual ROFR. Roles: technical co-founder is CTO, business co-founder is CEO; board has both, plus the Series A lead from month 18.

Common pitfalls

• Splitting equity 50/50 without thinking through long-term governance.
• Failing to address co-founder departure clearly in the founders' agreement.
• Ignoring co-founder fit and cultural alignment until conflict arises.

When this shows up in a pitch deck

The Team slide explains how the co-founders met, how they complement each other, and why this team is uniquely positioned for this opportunity.

See Co-Founder in context

Co-Founder shows up most often in these scoring rubrics and investor profiles — jump straight to who cares about it and how to pitch them.

In VC frameworks

• First Round Capital — pitch deck framework
• Antler — pitch deck framework

Related terms

• Founder — A person who started or co-started the company and (typically) holds founder common stock subject to founder vesting.
• Founder Vesting — A vesting schedule applied to founder equity, typically required by VC investors to align founders with the long-term outcome.
• Common Stock — The base equity class held by founders and employees, with voting rights but no preference rights or dividends.
• 83(b) Election — A US tax election letting restricted-stock recipients pay tax on the grant-date value (not at vesting), often saving early-stage founders meaningful tax.
• Cap Table — A spreadsheet or system-of-record showing every shareholder, share class, option, warrant, and convertible instrument outstanding in a company.

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