Should I Sell My Company Stock When the IPO Lockup Period Expires?
Last reviewed: July 2026
In most cases, yes, you should sell at least a meaningful portion of your company stock when the IPO lockup period expires. The lockup period is the 90-to-180-day window after a company goes public during which employees and insiders are barred from selling shares. Once it lifts, you finally control a position that may represent an outsized chunk of your net worth, and concentration risk is the real problem to solve, not market timing.
Key Takeaways
- The IPO lockup period typically lasts 180 days after a company goes public, during which insiders cannot sell.
- RSUs are taxed as ordinary income at vesting, so selling at lockup expiration usually creates no new tax bill.
- Long-term capital gains rates apply only after you hold shares for more than one year, per the IRS.
- A single stock should rarely exceed 10% to 15% of your total investable net worth.
- Selling on a rule-based schedule beats holding for an arbitrary price target you invented.
About the Author: Jeff Judge, CFP®, AEP®, ChFC®, CLU® is Managing Partner of Chesapeake Financial Planners in Forest Hill, Maryland. He has been helping families and business owners in Harford County and the Baltimore metro area navigate equity compensation and concentrated stock decisions since earning his CFP® certification in 2013, by using Chesapeake Financial Planners’ signature process, the R.U.D.D.E.R. method™. Jeff has watched talented engineers hold a winning IPO stock all the way back down to break-even because they were waiting for a number that was never coming.
What Is the IPO Lockup Period and How Long Does It Last?
The IPO lockup period is a contractual restriction that prevents company insiders, employees, early investors, and founders from selling their shares for a set window after the company goes public. Most lockups run 180 days. Some are shorter at 90 days, and executive or founder shares can be locked up for 12 months or longer.
Underwriters set these terms, and the company discloses them in its S-1 registration statement filed with the Securities and Exchange Commission. The point is to stop a flood of insider selling from crushing the stock in its first days as a public company. It also signals confidence to new public investors who are buying in.
Here is what trips people up: the lockup is not the only restriction you will face. Once it lifts, you become subject to the company's quarterly trading windows and blackout periods, which I cover below. So the lockup expiration is often your first genuinely clear shot at selling without a corporate restriction in the way.
What Happens to the Stock When the Lockup Expires?
When the lockup expires, thousands of employees become eligible to sell on the same day, and trading volume usually spikes. Academic and market research has long documented a measurable price drift downward around lockup expiration, often in the range of a few percentage points in the days surrounding the event, even when the market knows the date is coming.
This is called "lockup expiration overhang." Markets often price some of it in ahead of time, but actual selling pressure frequently pushes the stock lower anyway. The pattern is not guaranteed, and a strong company can absorb the supply. But you are gambling if you assume your stock is the exception.
Jeff Judge tells clients the same thing every time this comes up: the expiration date is not a market-timing puzzle to solve, it is a risk you can finally retire. The stock could rise. It could fall. What you actually control is how much of your future depends on one ticker symbol.
Why Should I Sell Instead of Holding for More Upside?
You should sell because holding a concentrated position past lockup expiration usually means taking speculative risk for no extra reward you can count on. For employees who joined three to five years before an IPO, company equity often balloons to 40% to 60% of net worth. That is not a portfolio, it is a bet.
There are several reasons selling makes sense at this point:
- You already took the real risk. The hard part, joining a private company that might have failed, is behind you. Lockup expiration is when you get paid for that risk and lock in the outcome.
- Newly public stocks are volatile. Recent IPOs swing harder than seasoned public companies. Riding that volatility with half your net worth on the line adds risk without a clear payoff.
- Your job is already a bet on the company. If the stock craters, you can face reduced wealth, a smaller future equity grant, and higher layoff risk all at once. That triple exposure is the core danger of concentration in employer stock.
A useful rule of thumb: no single stock should make up more than 10% to 15% of your total investable assets. If you are well above that, selling down to a sane level is not pessimism, it is basic diversification. For a deeper look at this threshold, see our breakdown of How Much of My Portfolio Should Be in One Stock?.
This is where a structured planning process matters. The R.U.D.D.E.R. Method™ is Chesapeake Financial Planners' six-step planning process: Review and Recognize, Uncover and Understand, Design and Develop, Discuss and Decide, Execute and Empower, and Reassess and Refine. For an IPO windfall, the "Design and Develop" step is where we build a written selling schedule so the decision is made before emotion takes over.
Will Selling Trigger a Big Tax Bill?
Usually not, and this surprises people. RSUs are taxed as ordinary income at vesting, based on the share value on the vesting date. According to the IRS, you generally recognize that income when the stock is transferred to you and it is no longer subject to forfeiture. Because you already paid tax at vesting, selling those shares at or near the same price creates little to no additional tax.
The one exception worth flagging: shares you hold hoping to qualify for long-term capital gains treatment. The IRS requires you to hold an asset for more than one year for the lower long-term rate to apply, per IRS Topic 409. Chasing that lower rate by holding a concentrated position is often a tax tail wagging an investment dog. If the stock drops 25% while you wait to save a few points on taxes, you lost the trade. Jeff Judge notes: "Holding a concentrated position an extra year to chase long-term capital gains rates only makes sense if the stock cooperates, and your employer's stock doesn't owe you that favor."
How does equity compensation affect my financial plan? covers how to fold this into your broader plan, and our piece on How should my investment mix change as I get closer to retirement? explains where the proceeds should go once you sell.
Frequently Asked Questions
How long is the typical IPO lockup period?
The typical IPO lockup period lasts 180 days from the company's first day of public trading. Some lockups run shorter at 90 days, while founder and executive shares can be restricted for 12 months or longer. The exact terms are set by underwriters and disclosed in the company's S-1 filing with the SEC.
Do I owe taxes when I sell RSUs after the lockup expires?
Generally, no new tax is created when you sell RSUs shortly after lockup expiration. RSUs are taxed as ordinary income at vesting, so you have already paid tax on that value. Selling near the vesting price produces little or no additional gain. You only owe capital gains tax on appreciation that occurs after vesting.
What is the long-term capital gains holding period for my company stock?
You must hold a stock for more than one year to qualify for long-term capital gains rates, according to the IRS. Shares held one year or less are taxed at higher short-term rates equal to your ordinary income bracket. For RSUs, the holding period clock starts at vesting, not at grant or at the IPO date.
Does a stock always drop after the lockup period ends?
No, a stock does not always drop after lockup expiration, but research shows a measurable tendency toward modest price declines around the event. Markets often anticipate the date and price in some of the effect ahead of time. Strong companies sometimes absorb the added supply with little impact, so the pattern is a tendency, not a guarantee.
What are trading windows and blackout periods after an IPO?
Trading windows are limited periods, often two to three weeks after each quarterly earnings release, when employees may legally sell shares. Blackout periods are the stretches between windows when selling is prohibited to prevent trading on inside information. After lockup expiration, your selling is governed by these windows, which is why a pre-set plan matters so much.
How much of my net worth should be in one company's stock?
A single stock should generally not exceed 10% to 15% of your total investable net worth. Many employees who joined before an IPO end up with 40% to 60% concentrated in employer stock, which is speculative rather than prudent. Selling down to a reasonable percentage protects you from a single company's downturn wiping out years of savings.
Where to Go From Here
The IPO lockup expiration is not a market call, it is a chance to convert a concentrated bet into a real, diversified plan. Decide your selling schedule before the date arrives, not in the heat of a price swing.
If this was helpful, our guide to managing equity windfalls and building a diversification plan walks through the full process step by step. Download it at chesapeakefp.com and take the guesswork out of your next selling window.
Want to go deeper? Our Tech Equity Tax Traps Guide walks through this step by step.
Disclosures
The information provided is for educational purposes only and should not be construed as investment advice. Investment strategies should be tailored to individual circumstances, risk tolerance, and goals. Past performance doesn't guarantee future results. Consult with qualified financial professionals regarding your specific situation.
This information is not intended to be a substitute for specific individualized tax, investment or legal advice. We suggest that you discuss your specific situation with a qualified tax, legal or financial advisor.
Advisors associated with Chesapeake Financial Planners may be either (1) LPL Financial Registered Representatives offering securities through LPL Financial, Member FINRA and SIPC, and investment advisor representatives offering investment advice through Great Valley Advisor Group; or (2) solely investment advisor representatives offering investment advice through Great Valley Advisor Group and not affiliated with LPL Financial. Great Valley Advisor Group, and Chesapeake Financial Planners are separate entities from LPL Financial.
