SpaceX unlocks Wednesday: 319 million shares meet a 4.8% float

Figures below trace to SpaceX's Form 424B4 IPO prospectus filed June 12, 2026 (accession 0001628280-26-042639), the Form 10-Q for the period ended June 30, 2026 (accession 0001628280-26-052535), and the Q2 2026 results exhibit (accession 0001628280-26-052515), all retrieved through Aether. Options figures are delayed CBOE data from our own store as of August 18; flow premium is estimated from price and volume, and we make no claim about whether any trade was buyer- or seller-initiated. Market prices and multiples are as of August 18 and move daily. Research, not investment advice.

The loudest argument about SpaceX ($SPCX) since the June IPO has been about the multiple — how a company that lost $541 million last quarter carries a $1.9 trillion price tag. That argument will still be there in December. The document that matters this week is duller and more precise: the lockup table in the IPO prospectus. On Wednesday, August 20, the first tranche of insider shares becomes sellable — and it is half the size of the entire float that has set the price so far.

The float, from the filed numbers

Two filed numbers define the setup. The 10-Q cover page states that as of July 28, 2026 SpaceX had 7,696,293,669 Class A and 5,485,486,276 Class B shares outstanding — 13.18 billion in total. The 424B4 states that the IPO sold 638,888,888 Class A shares at $135.00 each.

Those IPO shares are essentially the only stock that has been free to trade. That is a float of roughly 4.8% of the company. Every print since June 12 — the run to about $171 at quarter-end, the drift back to the mid-$140s — happened on that sliver. When 95% of a company's shares cannot be sold, the market price is a scarcity price: it tells you what the marginal enthusiast will pay, not what the register of actual owners thinks the business is worth. The lockup calendar is the machine that converts the first kind of price into the second.

The calendar

The 424B4's lockup section lays out a staggered release rather than a single 180-day cliff:

There was an early-release valve: if the stock closed at or above 130% of the IPO price — $175.50 — for 5 of the 10 trading days ending on the first earnings release date, up to 455.8 million additional shares would have unlocked early. The stock topped out around $171. The valve never opened, so the schedule below stands.

August 20 (the 70th day after the prospectus): up to 319.0 million shares unlock — about 7% of the locked pool, and roughly half of today's entire float arriving in one day. September 9: another 319.0 million. September 10: 59.1 million shares held by affiliates. September 24 and October 9: about 328.4 million each. Further tranches follow through the fall, and the 180-day lockup expires in full around December 9, releasing the remainder of a locked pool of roughly 4.6 billion shares.

Add it up and the tradable float goes from about 639 million shares today to something like eight times that by mid-December. Eligible-to-sell is not the same as sold — plenty of insiders will sit tight — but supply that can trade is what market-makers, index committees and short-sellers price. From Wednesday onward, every marginal buyer of SpaceX is bidding against a growing register of thirteen-year-early investors and employees deciding whether $146 is a price they can live with.

The business is not the problem

Nothing in this piece is a complaint about the company, because the filed Q2 numbers were the strongest part of the story. Revenue of $7.8 billion, up 92%; adjusted EBITDA of $3.5 billion, up 191%; the net loss narrowed by $467 million to $541 million; Starlink subscribers doubled year-over-year to 12 million; $14.1 billion of cloud services contracts signed in the quarter; a $60 billion agreement to acquire Cursor expected to close in Q3 — all from the Q2 results exhibit. And the sharpest external verdict came from the market that does not do faith: in June, SpaceX sold $25 billion of investment-grade notes at coupons of 5.350% to 6.650% — the $100 billion first-half financing story we traced through the 10-Q cash-flow statement. Bond investors lent a company in peak capex burn twenty-five billion dollars at spreads normally reserved for boring compounders. That is the "trust" leg of the thesis, in a filed document.

The Tesla yardstick cuts both ways

The common bull case is a rotation argument: the people who pay 300 times earnings for Tesla ($TSLA) — because it is Musk, because the story is the product — now have a purer vehicle. The arithmetic is less absurd than it sounds. On trailing numbers SpaceX looks untouchable at over 300 times EV/EBITDA. But annualize the Q2 adjusted EBITDA — $3.5 billion a quarter, $14 billion a year — and the multiple is about 113 times, slightly below Tesla's own ~123 times trailing EV/EBITDA — on a business growing revenue 92% while Tesla's is roughly flat. On the only yardstick that cohort actually uses, SpaceX is not the expensive one.

But notice what kind of argument that is. It is not a claim about cash flows; it is a claim about a bid — that a specific crowd of buyers will keep paying a specific multiple. Until now that bid only had to absorb a 639-million-share float. Starting Wednesday, it gets tested against a supply schedule fifty times the average day's trading. Faith is not the question; absorption is.

What the options market is doing about it

Our delayed-options store shows positioning consistent with exactly this reading. As of August 18: 30-day at-the-money implied volatility near 66% — elevated for a megacap; put/call open interest at 1.12, tilted to puts; the largest put strike at $100 with about 181,000 contracts of open interest, and the largest call strike at $150 with about 139,000 — the spot price pinned just beneath it.

The flow of the last two sessions is the sharper tell. The biggest prints were not this week's speculation — they were December 2028 puts at the $105 strike (roughly $32 million of estimated premium) and the $80 strike (roughly $25 million): someone paying serious money for downside protection that outlives the entire lockup calendar and then some. Against that, the busiest near-dated lines were this Friday's $150 and $145 calls — expiring the day after the unlock. Long-dated insurance underneath, short-dated lottery tickets on top: that is what an options market looks like when it has read the same 424B4 table you just did.

Who is actually on the register

The Q2 13F census we published on deadline night — and corrected on the 17th — showed 1,752 institutions disclosing SpaceX positions worth about $570 billion at the June 30 marks. Against the filed 13.18 billion share count, that is roughly a quarter of the company in disclosed institutional hands, with Alphabet ($GOOGL) the largest single holder at 551.2 million shares — about 4.2% of the company. The other ~70% is the locked pool: founders, employees, xAI-merger holders and thirteen years of private rounds. The full register is on our institutional holders page, and it updates as filings land.

What to watch

Not the multiple — the tape. Wednesday's 319 million shares are the first real measurement of whether the Tesla-cohort bid absorbs supply or steps back from it, and the September 9–10 pair (378 million more, including the first affiliate shares) is the second. If the stock digests both without breaking the options market's $100 put wall, the scarcity price will have earned the right to be called a market price. If it doesn't, December 9 is still out there.

If SpaceX is in your book, this is precisely the kind of dated, filed, checkable claim our Thesis Monitor exists for: write down what you believe — "the unlock gets absorbed" is a thesis — and let it be tested against what actually gets filed, before the screenshots tell you what to think.

Research, not investment advice.