The reader's starting point
The strike price is a grant fact, not today's stock value
After an IPO, an employee may compare an old option strike price with the public stock quote and call the difference a gain. That quick calculation can miss split adjustments, grant classification, fair-market-value rules, taxes, and sale restrictions.
The 2024 plan contains a fair-market-value floor and authorizes the Board to determine fair market value. Individual option agreements establish the actual strike price and term.
Why the decision becomes consequential
A 409A valuation and a public share price answer different questions
The exercise price determines cash required and helps measure the spread, while the fair market value used for tax reporting may come from a different date and rule. Confusing either number can distort the exercise budget.
- Original option grant
- Split-adjusted share and strike record
- Grant-date valuation evidence
- Exercise confirmation
- Post-exercise cost basis
The turning point
Reconstruct adjustments before calculating the spread
Start with the original grant notice, then trace amendments, the May 2026 stock split, substitutions, vesting, and the administrator's current share and strike figures. Reconcile them before entering a tax or investment model.
Separate grant-date value, strike price, current market price, taxable spread, cash exercise cost, withholding, basis, and eventual sale proceeds.
Where the answer can change
Substituted awards and prior plans can carry special terms
The 2024 plan generally requires an option exercise price of at least fair market value at grant, with stated exceptions for substituted awards. It does not publish an employee's historic valuation or prove the tax treatment of a particular exercise.
Stock splits, recapitalizations, substituted awards, repricing, ISO modifications, and nonstatutory options can affect the record.
A practical finish
Keep the valuation trail with the exercise record
Preserve the grant-date evidence and the exercise-date evidence together. That record explains the cash paid, the value used for payroll or tax purposes, the shares received, and the basis carried into a later sale.
This guide provides general education for SpaceX employees. It is not individualized financial, investment, tax, legal, benefits, or securities-law advice and is not a recommendation to buy, hold, sell, exercise, transfer, roll over, or donate an asset.
Frequently asked questions
Questions to take back to the documents
Is my SpaceX option strike price the same as a 409A valuation?
No. The strike price is fixed by the grant terms, while a valuation may be used to establish fair market value for grant or tax purposes. Keep the exact grant-date evidence.
Did the May 2026 SpaceX stock split change option economics?
The amended plan references the 1-to-5 split. Confirm the administrator's adjusted share count and strike price for each individual grant.
Why can the public stock price differ from the value used at exercise?
Timing, plan definitions, market hours, payroll conventions, restrictions, and the specific tax event can affect the value used. Reconcile the official exercise confirmation.
Primary sources
What this guide is based on
Sources were reviewed on the dates shown. Later plan amendments, filings, agreements, or employee communications may change the answer.
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