What Is a SPAC? How Blank-Check Companies and De-SPACs Work
A SPAC goes public first and finds a business later. Here is how the trust account, the deadline, redemption rights and warrants work, and what the SEC's 2024 rules changed.
A SPAC (special purpose acquisition company) is a shell company that lists through an IPO, keeps the cash in a trust account and has a limited time to merge with a private company, which becomes public through that merger. Public shareholders can redeem their shares for their slice of the trust instead. The terms are in the SPAC’s SEC filings on EDGAR.
The merger with the target is called the de-SPAC transaction. For a private company, it is one of three main routes onto a stock exchange, next to a traditional IPO and a direct listing.
How does a SPAC IPO work?
A sponsor, usually an investment firm or a group of executives, forms the SPAC and takes it public by selling units to investors. A unit typically includes one share and a fraction of a warrant, and SPAC units have usually been priced around $10.
The IPO money goes into a trust account, usually invested in short-term US Treasury securities. Nasdaq’s listing rule for these companies (IM-5101-2) requires at least 90% of the IPO proceeds to be held in trust, and NYSE rules set a similar floor.
The sponsor pays a small amount for founder shares, commonly sized at about 20% of the shares outstanding after the IPO. That stake, often called the “promote”, is the sponsor’s main reward and only pays off if a merger is completed.
How long does a SPAC have to find a target?
The deadline is set in the SPAC’s charter, and exchange rules cap it. Nasdaq’s rule requires a business combination within 36 months of the IPO registration statement becoming effective, or a shorter period the SPAC chooses. Many SPACs set 18 to 24 months and ask shareholders to approve extensions if they need more time.
Each extension vote usually gives public holders another chance to redeem their shares. That is why trust accounts often shrink well before any merger.
What are redemption rights?
Redemption rights let a public SPAC shareholder hand back shares for a pro rata share of the trust account, including interest earned, when the SPAC holds a vote on a merger or an extension. Holders can generally redeem whether they vote for or against the deal.
Redemptions are the main protection for SPAC investors, and they shape the deal. When many holders redeem, less cash reaches the target company, so de-SPAC deals often add a PIPE (private investment in public equity) from outside investors to make up the difference.
| Security | What it gives the holder | If no merger happens |
|---|---|---|
| Public share | A vote on the deal and the right to redeem for cash from the trust | Cash from the trust, per share |
| Public warrant | The right to buy more shares at a set price after the merger | Usually expires worthless |
| Founder share (sponsor) | About 20% of post-IPO shares, converting at the merger | No claim on the trust; typically worthless |
What happens in the de-SPAC merger?
The de-SPAC follows the steps of a public company merger:
- The SPAC signs a merger agreement with a private target and announces it in an 8-K and press release.
- The SPAC files a proxy statement, or a registration statement on Form S-4 or F-4 when new shares are issued, describing the target, its financials and any projections.
- SPAC shareholders vote on the merger, and those who want cash submit redemption requests before the stated deadline.
- The deal closes, the SPAC takes the target’s name and the combined company trades under a new ticker.
Because sponsor shares, warrants and deal fees all come out of the combined company, each remaining share often represents less than $10 of cash. The SEC’s 2024 rules require that dilution to be laid out in the filings. The broader mechanics of a shareholder vote are explained in our guide to how a merger vote works.
What did the SEC’s 2024 SPAC rules change?
The SEC adopted new SPAC rules on January 24, 2024, and they took effect on July 1, 2024. According to the SEC’s fact sheet on the final rules, they:
- require more disclosure about sponsors, sponsor compensation, conflicts of interest and dilution;
- make the target company, in certain situations, a co-registrant that is legally responsible for the de-SPAC registration statement;
- require prospectuses and proxy statements for de-SPAC deals to be sent at least 20 calendar days before a vote, where local law allows;
- remove the PSLRA safe harbor for forward-looking statements, so projections in de-SPAC deals carry liability closer to a traditional IPO, and require disclosure of the assumptions behind projections.
Status as of November 2026: the rules remain in effect. SEC Chair Paul Atkins said in 2025 that the agency would review them, and the SEC’s rulemaking file for these rules (S7-13-22) lists no amendment so far. Check sec.gov for any later proposal.
What happens to SPAC shareholders if no deal is done?
If the SPAC misses its deadline without completing a merger, it liquidates. Public shareholders get their pro rata share of the trust account back, the warrants generally expire worthless and the sponsor’s founder shares receive nothing from the trust.
Exchanges also act on deadlines: a SPAC that has not completed a combination within the exchange’s time limit faces delisting. Shareholders of a liquidating SPAC typically receive cash through their broker after the trust is distributed.
How a SPAC listing compares with the other two routes is set out in our guide to direct listings vs IPOs vs SPACs. Insider selling limits after a de-SPAC are similar to those after an IPO; see how IPO lockups work.
Bottom line
Three numbers in a SPAC’s filings tell you most of what you need: the cash per share in the trust, the redemption deadline before each vote, and the dilution table showing how sponsor shares and warrants affect each remaining share. Whether to redeem is a personal decision; a broker or financial professional can explain the mechanics for your account.
FAQ
Why is a SPAC called a blank-check company?
Because investors give the sponsor money before any target business is identified. Under securities law, SPACs are a type of blank-check company, though they are structured to avoid the older penny-stock blank-check rules.
Can I redeem my SPAC shares and keep the warrants?
In most SPACs, yes: redemption applies to shares, and separately traded warrants stay with the holder. The prospectus and proxy state the exact terms.
How do I submit a redemption request?
If your shares are at a broker, ask the broker to submit the redemption before the deadline in the proxy statement, which is often two business days before the vote. Brokers may set an earlier internal cutoff.
Are SPAC deals still happening?
Yes. SPAC IPOs and de-SPAC mergers continue under the 2024 rules, and new SPAC filings appear on EDGAR as Form S-1 registrations for blank-check companies.
