You have spent years building a company. You navigated the seed rounds and survived the growth stages. Finally, you reach the initial public offering or IPO. The company goes public and the stock price likely creates significant paper wealth for you and your early team.
However, you probably cannot access that money yet.
This is due to the lock-up agreement. It is a legally binding contract between the underwriters of the IPO and the insiders of the company. Insiders include founders, executives, managers, and early venture capital investors.
The agreement prohibits these groups from selling any shares of stock for a specified period of time. It acts as a mandatory holding period that kicks in the moment the company goes public.
The Mechanics of the Lock-up
#It is important to note that a lock-up agreement is not technically required by the SEC or federal law. It is a contractual requirement driven by the investment banks underwriting the deal.
The standard duration for a lock-up period is 180 days. That is roughly six months where your liquid net worth remains tied entirely to the performance of the stock without the ability to diversify.
While 180 days is the industry standard, timelines can vary. They might range from 90 days to a full year depending on the specific structure of the offering and the leverage the company has during negotiations.
During this time, you own the shares, but you cannot trade them. This applies even if the stock price skyrockets or if it plummets.
Why Underwriters Require It
#The primary purpose of the lock-up is market stabilization. When a company first lists on a public exchange, the trading volume and price discovery are volatile.
If every founder, employee, and early investor sold their shares on day one, it would flood the market with supply. Basic economics dictates that a massive increase in supply without a matching increase in demand causes prices to drop.
Underwriters want to ensure the stock price remains stable to protect the investors who just bought into the IPO.
There is also a psychological component.
If the founders sell immediately, it signals a lack of confidence in the company’s future. Public market investors want to see that leadership is committed to the long term vision, not just looking for a quick exit.
Variations and Release Provisions
#Not all lock-up agreements are rigid blocks of time. Modern structures often include staggered release provisions.
For example, an agreement might allow insiders to sell a percentage of their holdings if the stock price stays above a certain threshold for a set number of days. This helps release supply into the market gradually rather than having a massive sell-off event on day 181.
It is also worth noting the difference between a traditional IPO and a Direct Listing.
In a Direct Listing, companies often bypass the traditional underwriting process. Consequently, Direct Listings frequently have no lock-up agreement, allowing insiders to sell immediately. This is a significant strategic consideration for founders weighing exit options.
Strategic Questions for Founders
#As you approach a potential exit, you need to audit your personal financial runway.
Can you sustain your lifestyle for another six to twelve months after the IPO without liquidating assets?
Are you prepared for the tax implications if the stock value changes significantly during the lock-up?
Understanding the lock-up agreement helps you manage expectations for your team and yourself. It is the final hurdle in the transition from a private startup to a public entity.

