August 6 SPCX Unlock: 911 Million More Shares Are About to Flood the Market

TL;DR

• August 4: SpaceX reports Q2 results, its first earnings since listing. The report itself triggers the first unlock, so the date matters twice.
• August 6: roughly 911.5 million shares, worth about $116 billion, become eligible to trade. For scale, the entire IPO sold 555.6 million shares.
• Then it keeps coming on a fixed day count from the offering: five 7% tranches at days 70, 90, 105, 120 and 135, which fall around August 21, September 10, September 25, October 10 and October 25. Then a roughly 28% release tied to Q3 earnings, and all remaining 180-day shares on December 8, 2026.
• Musk and a select group of insiders stay locked until mid-2027. That is the one piece of good news in the calendar.
• SPCX priced at $135 on June 12 in the largest IPO ever, $86 billion raised, and closed around $113.50 on July 28. It is already below the IPO price and the supply has not started yet.

The Full Unlock Calendar

This is a schedule, not an opinion. Put these dates in a calendar.

Two features of that table deserve emphasis.

The first tranche is bigger than the IPO. SpaceX offered 555,555,555 Class A shares at $135, and underwriters exercised their option in full for a further 83,333,333, so 638,888,888 shares were sold in total to raise a record $86 billion. The August 6 eligibility covers roughly 911.5 million shares. More stock becomes sellable in one day than the entire offering that created the public float.

And that is the number that matters, because the float is tiny. SpaceX has roughly 13.1 billion shares outstanding, so the 555.6 million share public float is about 4.2% of the company. Against that base, the August 6 tranche is an increase of about 164%: the tradeable float goes to roughly 2.6 times its current size in a single day.

Hold that next to the other way of measuring the same event. Those 911.5 million shares are only about 7% of shares outstanding. So the correct reading is not that a large slice of SpaceX becomes sellable, because it does not. It is that a small company's worth of stock lands on a float that was deliberately kept scarce, and scarcity was doing a great deal of work in the valuation. If the conditional tranche eventually releases too, the float reaches roughly 3.5 times its present size.

Who Actually Owns the Shares, and Will They Sell?

The supply numbers are meaningless without knowing whose stock it is, because different holders behave in completely different ways. The register splits cleanly into three groups.

Group one: cannot sell. Elon Musk holds about 42% of the equity and more than 80% of the voting power through Class B super-voting shares, and he is locked until mid-2027. The single largest holder is mechanically absent from every date on this calendar. That is the most underweighted fact in the whole discussion.

Group two: will not sell. Alphabet owns close to 7%, from a $900 million investment made alongside Fidelity in January 2015, and has held it for eleven years without trimming. EchoStar is strategic. Nvidia and the Qatar Investment Authority arrived through the February 2026 xAI merger and have owned the position for months, not years. Sovereign wealth funds have no fund life and no redeeming investors. None of these holders has a reason to hit a bid in August.

Group three: the actual sellers. Two populations, and they are the ones that matter.

The early venture funds. Founders Fund wrote a $20 million cheque into the 2008 Series C, and that stake is now worth roughly $50 billion. That is about 2,500 times the money, held for eighteen years. Sequoia, Andreessen Horowitz and Valor Equity Partners each hold around 2% or below. Venture funds have finite lives and investors who have been waiting since the last financial crisis, and distributing a position that has become this concentrated is not greed, it is the job.

The employees. SpaceX pays its workforce in restricted stock and options, and the company does not break out the collective total in its filings, which makes it the least visible part of the register. This staggered schedule is the first genuine liquidity most of them have ever had.

The part that breaks the "they will wait for a better price" argument

The intuitive hope is that holders will not sell into a stock 19% below its IPO price and near its all-time low. For the strategics, that is right. For the group most likely to sell, it is wrong, and the reason is cost basis.

A 2008 Series C position has a cost basis of effectively nothing. At roughly 2,500 times money, the difference between selling at $135 and selling at $110 is the difference between a 2,500x and a 2,030x return. Neither number changes any decision. The seller with an eighteen-year hold and a near-zero basis is the most price-insensitive participant in the market, which is exactly what makes lock-up supply relentless rather than opportunistic.

The scale is real, too. If 20% of the restricted pool is 911.5 million shares, that pool is roughly 4.6 billion shares, and each 7% tranche is about 319 million shares, worth roughly $35 billion at $110. Set against an original float of 555.6 million, one 7% tranche is another 57% of the stock that existed before August.

Against that, one genuine mitigant: Founders Fund's first 20% slice alone is around $10 billion, against a total float worth about $61 billion. A holder that large cannot exit through the open market without destroying its own price. Positions of this size get distributed to limited partners in kind, or placed in blocks at a negotiated discount, and both routes spread the impact over months rather than dumping it into a Thursday.

This is a staircase, not a cliff. Standard lock-ups end on one date and the market braces for one bad session. SpaceX staggered it: 20% after Q2 earnings, then five 7% tranches at days 70, 90, 105, 120 and 135, roughly fortnightly through October, then a large earnings-triggered slug at Q3, then the remainder on December 8. That design reduces the size of any single shock and replaces it with something arguably worse for a stock already falling: four months of continuous, scheduled, known supply.

The Board

Not a cliff. A staircase, running from August to December.

Why August 4 Is the Date That Matters Most

Because it does two jobs at once, and most coverage only mentions one.

Job one: it is the first earnings report SpaceX has ever filed as a public company. Nobody has modelled this business against a real disclosure. The losses on record are large: a $4.9 billion net loss in 2025 and another $4.28 billion in Q1 2026, driven largely by Starship development and AI infrastructure spending. Those are the numbers investors have. What Q2 looks like, and what management says about the path, is genuinely unknown.

Job two: the report triggers the unlock. The first roughly 20% tranche is tied to Q2 earnings, with shares eligible from August 6. So a bad print does not just reprice the stock, it releases supply into the reprice two days later. A good print does the reverse: it gives early holders a better level at which to sell.

That is an unusual and unkind structure. The event with the most uncertainty is wired directly to the event with the most supply.

What the Valuation Can Absorb

Here is the honest arithmetic, and it is where our existing view comes from.

SPCX carries a market capitalisation around $1.54 trillion. On the numbers in our piece on SPCX below its IPO price, that is roughly 90x trailing sales and about 46x forward revenue, against Rocket Lab near 63x and legacy aerospace near 2x. The forward multiple only makes sense if revenue roughly doubles toward $36 billion.

One correction to our own earlier work while we are here. That piece described the lock-up as a single early-December expiry and built a December put spread around the idea of one flush. The staged schedule above supersedes that framing: the first and largest tranche arrives in August, and December is the tail rather than the event.

Now layer the share price path on it. The stock priced at $135, reached about $225 at its high, and closed near $113.50 on July 28. It has given back the entire post-IPO gain and then some, before a single locked share has been sold.

A 90x sales multiple is a promise about the future. Four months of scheduled selling is a fact about the present. Multiples that high need scarcity of stock to hold, and scarcity is precisely what this calendar removes.

What Actually Happens on an Unlock

Worth being clear, because the popular version is wrong.

"Eligible to trade" is not "will be sold." The 911.5 million figure is what becomes permitted, not what hits the tape. Employees hold for tax reasons, conviction, or because they cannot sell into weakness without crystallising a loss. Historically, actual selling into a large unlock is a fraction of the eligible amount.

But the price reacts before the selling, not after. Markets front-run known supply. The typical pattern is weakness in the days before an unlock date as traders position for it, then a relief bounce if the feared selling does not materialise. That means the tradeable event is the anticipation, not the event.

And repeated tranches train the market. Because this schedule repeats every two to four weeks, each date becomes a smaller, more predictable version of the same setup. By October the market will have learned how much supply actually arrives per tranche, and the reaction should compress.

The Playbook

• Do not buy SPCX before August 4. You would be taking an unmodelled first earnings report and a supply trigger in the same week, for no compensation.
• The dates to watch are the two or three days before each tranche, not the tranche itself. That is when positioning pressure shows up.
• Musk being locked until mid-2027 is genuinely important. The largest holder cannot sell, which removes the worst-case supply scenario for eighteen months. Weigh that against everything above.
• If you want the space theme without the calendar, own something else. Rocket Lab trades at a lower multiple with no unlock overhang. Owning SPCX specifically through August to December is choosing to fight a known supply schedule.
• For options, this is the rare case where a defined-risk bearish structure has a genuine edge in the timing, because the supply dates are published. But implied volatility already reflects them, so you are not getting the calendar for free. Read calls and puts explained before expressing this with anything short-dated.
• The bull case against all this: SpaceX is the most strategically important private company of the era, Starlink revenue compounds, and a first earnings report that shows the losses narrowing would reframe the whole multiple. If Q2 is strong, the unlocks get absorbed and December looks like the bottom. That path exists. It requires the print on August 4 to be good.

The One-Line Read

SpaceX reports on August 4 and that same report opens the gates on roughly 911.5 million shares, about $116 billion worth, eligible from August 6 and followed by 7% tranches every two to four weeks until the last 180-day shares free up on December 8: the stock is already below its $135 IPO price at around 90x sales, and a multiple that high needs scarce stock, which is exactly what this calendar spends four months removing.