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How to Think About Selling Equity When Your Company Goes Public

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Published
06/18/2026

When a company goes public, it changes everything for employees who hold equity. One day, your shares exist mostly on paper. The next, they have a market price and a sell button. For many SpaceX employees, that moment is here, and it comes with decisions that are easy to get wrong.

The pressure to act quickly is real. Lockup windows open and close. The stock moves. Friends and colleagues start talking about what they're doing. In that environment, it's easy to make decisions that feel right in the moment but create problems that are hard to undo. Taking a step back before any window opens is one of the most valuable things you can do, especially if you're thinking about selling SpaceX stock after the IPO.

Two of the most important things to understand before you sell anything: your lockup restrictions and your tax exposure. Getting either of these wrong can be costly, and the two are more connected than most employees initially realize.

 

Understanding the Lockup Structure

Not all IPOs handle lockups the same way. The standard approach is a blanket 180-day restriction that lifts all at once, leaving employees free to sell everything after six months. SpaceX took a different approach, using a staggered release structure that unlocks different percentages of eligible shares across a series of windows tied to earnings releases and specific price triggers.

That structure gives employees more flexibility than a traditional lockup, but it also requires more planning. Each window is limited in how much you can sell, which means you can't simply wait for the lockup to expire and then act. Understanding SpaceX lockup windows and taxes together — not as separate questions — is essential to making smart decisions across each window.

 

Why Timing Affects What You Owe

When you sell matters as much as how much you sell. Shares held longer than a year qualify for long-term capital gains rates, which are meaningfully lower than ordinary income rates. Selling too quickly — or stacking too many sales into a single tax year — can push you into a higher bracket and significantly increase your bill.

Different equity types also have different holding period rules. RSU holders start the clock at vesting. Option holders start it at exercise. If you hold multiple grant types with different vesting dates, the tax treatment of each lot can vary considerably. Knowing exactly what you own and when each lot qualifies for long-term treatment is a prerequisite for any thoughtful selling plan.

State taxes add another layer. Depending on where you live, your state rate on capital gains could range from zero to well above 10%. That gap is large enough to factor meaningfully into both the timing and sequencing of your sales.

 

Selling Everything at Once Is Rarely the Right Move

The instinct to diversify is sound. Holding a large portion of your net worth in a single stock — even one you believe in — is a concentration risk most financial advisors would flag immediately. Public stocks are volatile, and a newly public company can move dramatically on a single earnings report or piece of news.

But selling your entire position in one window isn't the only way to reduce that risk. There are strategies that let you lower your concentration in a single stock without triggering a massive tax bill all at once. Some approaches defer the tax event entirely. Others use the staggered window structure to spread gains across multiple years. The right path depends on your equity type, your cost basis, your income, and your broader financial picture.

 

What to Do Before the First Window Opens

The most valuable planning happens before any lockup window opens, not after. Pull up your equity statements and understand exactly what you hold — every grant type, every vesting date, every cost basis. Run a projection of what you'd owe under different selling scenarios. Think through what you actually need the money for and over what timeline.

Most importantly, talk to a qualified advisor before you act. The decisions made in the first few weeks after an IPO are among the most consequential an employee will ever face, and they're not easily undone. For a deeper look at what to consider before you sell, check out this guide to selling SpaceX stock after the IPO, written by a fiduciary advisor. A fee-only fiduciary can help you build a plan that accounts for the full picture, not just the window in front of you.

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