When a SPAC deal is announced "at a $1.2 billion valuation," that number is the headline: the price negotiated for the target's existing shareholders. It is not what buyers of the stock are paying for the company. The effective valuation — every claim on the merged company's equity, counted honestly — is nearly always higher, because the headline quietly ignores the sponsor's promote, the warrants, and often the PIPE. The gap between the two numbers is the dilution, and it's computable from public filings.
A real deal, verified line by line
On June 8, 2026, Inflection Point Acquisition Corp. VI (IPFX) announced a definitive agreement with Quantum Space at a $1.2 billion headline equity value (8-K and announcement materials, SEC accessions 0001213900-26-066032 and 0001213900-26-068265). The same filings describe the rest of the structure:
- a $300 million PIPE (new shares sold to institutions at closing),
- the sponsor's promote — parsed from the deal's structure filings at 25% of post-IPO shares,
- public warrants from the IPO (a claim above $11.50 per share),
- $253 million of IPO proceeds in trust, subject to redemption.
Count every one of those claims at the $10.00 reference price and the equity of the post-close company comes to $1,787 million — not $1,200 million. That is 49% more company-on-paper than the headline suggests. A buyer at $10.00 is not buying into a $1.2B company; they're buying into a $1.79B one, and the difference accrues to people who paid $0.0036 per share (the sponsor — see the sponsor promote) or bought at a negotiated discount.
The same computation on the BCAR–Exascale Labs deal: $500 million headline, but the S-4's own pro-forma count of 60.456 million shares × $10.00 = $604.6 million effective — a 21% gap (accession 0001829126-26-005354).
The method, so you can redo it on any deal
Fast path — the filing does the work. Once an S-4 or merger proxy exists, it contains a pro-forma ownership table: the actual expected share count of the combined company, including rollover, public, founder and PIPE shares. Then:
effective equity = pro-forma shares × $10.00 dilution = (effective − headline) ÷ headline
Bottom-up — before the S-4 exists. Sum the claims yourself at $10.00 per share:
| Claim | Where it comes from |
|---|---|
| Target consideration | headline value ÷ $10 (the negotiated rollover) |
| Public shares | IPO size ÷ $10, minus any redemptions to date |
| Founder promote | typically ~20–25% of post-IPO shares, from the prospectus |
| PIPE | PIPE size ÷ PIPE price (usually $10, sometimes discounted) |
Two claims need care rather than addition:
- Warrants (what they are) are worth zero intrinsically at $10.00 with an $11.50 strike — but they cap your upside: above $11.50 each warrant mints a discounted share. Honest accounting lists them at zero today with the share count on display.
- Earnouts — extra shares management or sellers receive if the stock hits targets — are contingent. Count the shares, not the value; they dilute exactly when things go well.
We run this arithmetic automatically for every deal we cover, preferring the filing's own pro-forma count whenever one exists, and publish both numbers side by side on the deals page.
Why the gap persists
Nobody involved in announcing a deal benefits from quoting the bigger number. The target wants the flattering multiple. The sponsor's promote is part of the gap. Journalists quote the press release. And by the time the S-4's ownership table makes the real count official, the announcement headlines are months old. The information isn't hidden — it's just in chapter twelve instead of the title.
What to do with it
- Re-price the multiple. A target announced at "$1.2B, 4x revenue" is, effectively, 6x revenue at $1.79B. If the pitch only works at the headline number, it doesn't work at the real one.
- Watch redemption shrink the denominator. Fixed claims (promote, PIPE) don't redeem; public shares do. A 90%+ redemption closing — routine, as the redemption walkthrough shows — leaves remaining holders with the same dilution concentrated on far fewer shares.
- Remember which side of the floor you're on. Until the final redemption window, you can always take trust value instead of the diluted equity (why below trust matters). After it, the effective valuation is the only valuation — there is no floor left to fall back on.
The headline is the deal's asking price. The effective valuation is its cost. On every deal we track, the deals page shows both — and the gap between them is usually the single most informative number in the announcement.