SpaceX’s Staggered Lockup Means Six Selling Decisions, Not One: How Employees Should Think About Each Window
Space Exploration Technologies Corp. (“SpaceX”) has spent the past two decades rethinking rocketry. Now it is rethinking initial public offering (IPO) lockups.
For decades, the standard IPO lockup has followed a simple structure: Insiders and pre-IPO shareholders wait through a single 180-day lockup period, and then everyone is free to sell on the same date. That concentrated release can create downward pressure on the stock price as early investors begin selling their shares. SpaceX has taken a different approach. Its staggered structure has the potential to benefit shareholders, but it also introduces additional complexity by requiring employees and other investors to make a series of selling decisions rather than just one.
Instead of a single cliff at 180 days, the SpaceX lockup releases shares in tranches across the entire six-month window. Per the company’s S-1 filing, eligible shareholders can sell up to 20% of their locked shares starting on the second full trading day after Q2 2026 earnings, with an additional 10% available if the stock trades at least 30% above the $135 initial public offering (IPO) price for five of the 10 trading days ending on, and including, the earnings release date. From there, 7% unlocks at each of five staggered windows on days 70, 90, 105, 120, and 135. An additional 28% unlocks on the second full trading day after Q3 2026 earnings, with the remainder coming off restriction at day 180. Elon Musk and certain significant investors are subject to a separate 366-day restriction and do not participate in the early release schedule.
For most eligible employees, that creates six primary selling decisions, or seven if the performance-based Q2 2026 release is available. For many, this is likely to be a benefit. It provides flexibility, reduces the pressure to make a large financial decision in a single emotional moment, and spreads potential selling pressure over time in a way that may may help moderate concentrated selling pressure on the stock
the share price. At the same time, it transforms one major sell-or-hold decision into a sequence of smaller ones, each with its own tax implications, behavioral traps, and coordination challenges.
Rather than viewing each window in isolation, a potentially more effective framework is to think of them as components of a single, coordinated diversification strategy.
Build Your Plan Before the First Window Opens
The first early release window arrives roughly two months after the IPO, likely sometime in August, depending on when SpaceX schedules its first earnings call. That is not a lot of time to build a thoughtful plan from scratch.
Before the first window opens, your plan should answer three questions:
- How much do you ultimately want to keep? How much do you want to sell now, and how much over time? Those answers establish your diversification targets. Without them, every window becomes an emotional bet on whether the stock is going up or down.
Diversification is not a judgment on SpaceX’s future prospects. It is recognition that the goal is not simply to maximize the return from a single investment. The goal is to help build a portfolio that aligns with your long-term financial objectives. A diversified portfolio is designed to be more robust because it relies on multiple sources of return rather than a single source, with the goal of making the overall outcome more dependable over time. - What job is the money supposed to do? A house down payment, paying off debt, funding a child’s education, building a diversified portfolio, and charitable giving: Each has different timing and tax considerations. Money that needs to be deployed within two years has different requirements than money that will compound for 30.
- What does your tax picture look like across the next few years? The full 180-day lockup period will fall within tax year 2026. Without planning, a substantial portion of your gains could land in one tax year.
If you answer these three questions before the first selling window opens, the individual decisions can become much simpler. You are no longer asking, “Should I sell now?” You are asking, “What part of my plan should I execute now?”
Avoid the Behavioral Trap of Treating Each Window as a Stand-Alone Decision
The staggered structure can create new psychological risks.
A 180-day cliff lockup forces a single decision. A staggered lockup invites a sequence of small decisions, each of which can be influenced by short-term market movements, recent news, and emotional states. If the stock rises sharply after the IPO, you may feel bullish and sell less than planned. If it falls sharply, you may feel the shares are undervalued and sell less than planned. In either case, the result can be the same: You sell too little and remain heavily concentrated.
Multiple decision points also create opportunities to procrastinate. It becomes easy to postpone a planned sale until “the next window,” especially if the stock is rising or recent news is encouraging. Small delays can compound until, by the final window, your stock holdings look very different from what you intended.
The discipline is to set the selling plan before the first window opens and to execute it according to schedule, with limited, predefined exceptions. In other words, decide once and then execute six times.
Coordinate the Selling Windows Across Tax Years
For many employees and early shareholders, much of the gain on SpaceX shares will be taxed as long-term capital gains, with federal rates up to 20% plus the 3.8% net investment income tax. If the amount of stock to be sold under your plan is large, the magnitude of the gain itself may push you into the top bracket and trigger additional state taxes and lost deductions tied to adjusted gross income (AGI) thresholds.
It’s worth considering whether shifting some gain into tax year 2027 could hep reduce tax liability. Treat the day-180 window ending December 9, 2026, as a deliberate bridge into 2027. Shares you don’t sell by year-end can be sold in early January 2027, pushing the realized gain into the next tax year. If your selling plan is, for example, 50% over 12 months, you don’t need to execute the entire 50% by December 31. You can execute half by year-end and half in January. This would spread the capital gains over two years and potentially reduce your overall tax liability.
It is important not to overstate the potential tax benefit. For very large gains, much of the income may already be taxed at the highest federal capital gains rate, limiting the benefit of spreading sales across calendar years. In addition, normal stock price volatility may have a much larger impact on after-tax wealth than modest differences in tax rates. Tax planning is worthwhile, but it should remain secondary to the broader diversification plan.
This is not market timing. It is tax-year smoothing. The point is to model whether spreading sales across 2026, 2027, or later tax years could reduce your total tax liability while helping keep your broader diversification strategy on track.
A few additional tax considerations worth modeling before the first window:
- Estimated tax payments. Capital gains do not have withholding. If you sell substantially in August, your estimated tax payment is due September 15. If you sell in November, the next quarterly payment is January 15. Coordinate estimated tax payments with your CPA or tax preparer before the first sale.
- California residency. California taxes capital gains as ordinary income, not at a preferential capital gains rate. For high earners, the applicable rate may reach the top California marginal rate. State residency planning is a significant consideration for some employees and should be addressed well before the sale.
- Charitable giving with appreciated stock. Donating SpaceX shares directly to a donor-advised fund eliminates the capital gain on the donated shares and generates a deduction at fair market value. For high-tax-bracket employees with charitable intent, this is one of the highest-leverage planning moves available.
What to Consider Now
The Q2 2026 earnings release is approaching. Before it arrives, consider putting these three things in place:
- A diversification target with specific percentages tied to specific dates.
- A multi-year tax projection that models the income across 2026 and 2027.
- A written plan for what gets sold at each window and what triggers an exception.
SpaceX has fundamentally changed the mechanics of the traditional IPO lockup. Instead of asking employees to make one major diversification decision after 180 days, it asks them to execute one diversification strategy across multiple selling windows. The employees who navigate the process most successfully will likely be those who resist treating each window as a separate decision. They will make one thoughtful plan before the first window opens, then execute it one window at a time.
The staggered lockup gives employees more flexibility than a traditional IPO. Whether that flexibility becomes an advantage depends largely on the quality of the plan that is in place before the first selling window opens.
If you are a SpaceX employee trying to build a plan around the staggered lockup, or you are not sure how to coordinate the selling windows with your broader tax picture, I work with technology professionals on equity compensation, concentrated stock positions, and tax planning, including IPO transitions like this one. You can schedule a complimentary consultation directly.
This is intended for informational purposes only. You should not assume that any discussion or information contained in this document serves as the receipt of, or as a substitute for, personalized investment or tax advice from Savant. Please consult your investment or tax professional regarding your unique situation.
Bruce R. Barton
Managing Partner / Financial Advisor
CFP®, CFA®, MBA