Skip to content

Special Purpose Acquisition Company (SPAC)

A special purpose acquisition company is a shell company that raises money in an initial public offering with no business of its own, holds the cash in trust, and has a fixed period, usually two years, to merge with a private operating company, which thereby becomes public. If no deal closes, the cash goes back to shareholders; if one does, shareholders may take their share of the trust instead of staying in.

Last reviewed by Steven Fox, CFP®, EA on

Quick Summary

  • The SEC's regulation defines a SPAC by its business plan: to conduct a primary offering outside the blank-check rules, to "complete a business combination ... with one or more target companies within a specified time frame," and to "return proceeds from the offering ... to its security holders" if it does not.
  • A SPAC IPO typically sells units at $10, each a share of common stock plus a warrant, and places the proceeds in a trust or escrow account invested in safe short-term instruments until a deal closes or the SPAC liquidates.
  • When a merger, the "de-SPAC transaction," is proposed, public shareholders may redeem for their pro rata share of the trust, roughly $10 a share plus interest, whatever they paid on the open market.
  • The sponsor typically acquires a large block of shares for nominal consideration before the IPO, so the sponsor profits from almost any completed deal, and SEC rules since 2024 require the resulting dilution and conflicts to be disclosed.
  • A SPAC is a type of blank check company. The SEC's investor guidance notes that its shares are a claim on a trust account until a deal closes, and that buying above the trust value on the open market means the redemption right returns less than you paid.

Definition

A special purpose acquisition company is a company formed to raise capital in a public offering for the sole purpose of acquiring or merging with an as yet unidentified operating business within a set time. The SEC's Regulation S-K defines the term at Item 1601(b): a company that has "indicated that its business plan is to: (i) Conduct a primary offering of securities that is not subject to the requirements of ... (Rule 419 under the Securities Act); (ii) Complete a business combination, such as a merger, consolidation, exchange of securities, acquisition of assets, reorganization, or similar transaction, with one or more target companies within a specified time frame; and (iii) Return proceeds from the offering and any concurrent offering ... to its security holders if the company does not complete a business combination ... within the specified time frame," or that has "represented that it pursues or will pursue a special purpose acquisition company strategy." The same item defines the de-SPAC transaction as the business combination itself, the SPAC sponsor as the person or entity "primarily responsible for organizing, directing, or managing the business and affairs" of the SPAC, and the target company as "an operating company, business or assets."

The SEC's glossary places the term in its genus: "'SPAC' stands for special purpose acquisition company, and it is a type of blank check company." A blank check company is a development-stage company with no specific business plan or one to merge with an unidentified company; Rule 419 imposes escrow and shareholder-approval requirements on most of them, and a SPAC is, by definition, one structured so that Rule 419 does not apply. Rule 419 reaches only a blank check company that is issuing "penny stock," and the SEC's definition of that term excludes a security listed on a qualifying exchange and a security whose issuer has more than $5 million of net tangible assets, which is how a SPAC of ordinary size stays outside it while voluntarily adopting the trust-account and redemption features that make it saleable to public investors.

Advanced Explanation

The life cycle, in the SEC's account. A sponsor forms the SPAC and takes it public. The SEC's investor bulletin describes the pieces. The IPO is "typically priced at $10 per unit," each unit "consisting of common stock and warrants," and the units later split so the shares and warrants trade separately with their own ticker symbols. The proceeds, less amounts used for certain taxes, "are typically held in a trust account or an escrow account," which the SEC likens to the escrow in a house purchase, "held by a third party until the transaction is consummated," and generally invested "in relatively safe, interest-bearing instruments," though the bulletin notes there is no rule requiring that. The SPAC "will typically provide for a two-year period to identify and complete a de-SPAC transaction, but it can be as long as three years," may extend with shareholder approval, and if listed on an exchange "is generally required to complete a de-SPAC transaction within three years of its IPO or face delisting." If it finds no target, it liquidates and each shareholder receives a pro rata share of the trust.

The redemption right, and the trap in buying above trust value. When a target is found, the SPAC's shareholders "will typically have the opportunity to redeem their shares and, in many cases, vote on the de-SPAC transaction." A holder who does not like the deal takes cash, roughly the original $10 plus accumulated interest; a holder who does becomes a shareholder of the combined company. The SEC's warning concerns the open market: "if you purchased your shares on the open market, you are only entitled to your pro rata share of the trust or escrow account and not the price at which you bought the SPAC shares on the market." Its example is a SPAC that sold units at $10 and whose shares an investor later bought at $12: 100 shares are backed by about $1,000 of trust, "not the $1,200 you paid." Between the IPO and the deal, then, a SPAC share is a cash claim with an option attached, and any premium over the trust value is a bet on the sponsor finding a deal the market will like.

The sponsor's economics, and where the dilution comes from. The bulletin states the structural fact plainly: sponsors "generally purchase equity in the SPAC at more favorable terms than investors in the IPO or subsequent investors on the open market," and their shares "may have been obtained for nominal consideration." So although "most of the SPAC's capital has been provided by IPO investors, the sponsors and potentially other initial investors will benefit more than investors from the SPAC's completion of a de-SPAC transaction and may have an incentive to complete a transaction on terms that may be less favorable to you." Two mechanisms compound it. Heavy redemptions shrink the trust while the sponsor's block stays the same size, so the sponsor's percentage of the surviving SPAC rises as public money leaves. And the deal often needs additional financing, frequently from the sponsor, which "may dilute your interest in the combined company or may be provided in the form of a loan or security that has different rights from your investments." Warrants add a third layer: a SPAC "can redeem warrants pursuant to their terms," often once the stock trades above a stated price such as $18 for a period, and a holder who misses the redemption notice and fails to exercise can find the warrants "essentially worthless."

The 2024 rules. In January 2024 the SEC adopted Subpart 1600 of Regulation S-K and related rules, effective July 1, 2024, with a later compliance date of June 30, 2025 for one item. The adopting release summarizes what they do: disclosure requirements covering "compensation paid to sponsors, conflicts of interest, dilution, and the determination, if any, of the board of directors ... regarding whether a de-SPAC transaction is advisable and in the best interests of the SPAC and its security holders"; a minimum dissemination period for the documents sent to shareholders before a de-SPAC vote; a rule deeming a business combination involving a reporting shell company to be a sale of securities to that shell company's shareholders, so that the target's disclosure comes with Securities Act liability; a re-determination of smaller reporting company status after the deal; amendments on the use of projections; and guidance on when a SPAC might be an investment company. The bulletin's list of what a SPAC prospectus must now highlight follows from those rules: material conflicts between public shareholders and the sponsor, the sponsor's compensation and the securities issued to it, "material dilution to public shareholders," any agreements bearing on whether to proceed, and the sponsor's experience. Separately, the safe harbor for forward-looking statements under the Private Securities Litigation Reform Act has never been available to a blank check company, a point the earnings guidance page covers, and the 2024 release addressed its scope for de-SPAC transactions.

Reading one before investing. The SEC's advice reduces to documents. The IPO prospectus discloses the trust terms, the redemption rights, the deadline, the sponsor's holdings and the warrant terms. When a deal is announced, the proxy statement/prospectus, information statement/prospectus or tender offer statement discloses the target's business and financial statements, the parties' interests, the background of the negotiation and the board's determination. All of it is on EDGAR. What none of it discloses is whether the target is worth what the deal implies, and the SEC notes that a SPAC "is not obligated to pursue a target in the identified industry" it named in its prospectus.

How to Remember

A SPAC is a pile of cash in a trust with a sponsor holding the key and a two-year timer running. Until the timer stops, your share is worth about $10; after that, it is worth whatever the company the sponsor bought is worth.

Used in a Sentence

“The electric-bus maker went public not through an IPO but by merging with a special purpose acquisition company that had raised $300 million eighteen months earlier without any business of its own.”

How It Works

A sponsor forms the SPAC, buys founder shares for a nominal sum, and takes the SPAC public by selling units at $10, each a share plus a fraction of a warrant. The IPO proceeds go into a trust. The sponsor searches for a target; when it signs a deal, shareholders receive disclosure documents and, usually, a vote, and each may redeem for a pro rata share of the trust or stay in. If the deal closes, the target's business becomes the public company's business and the SPAC's shares become shares of the combined company. If the deadline passes with no deal, the trust is distributed and the SPAC dissolves.

A hypothetical example. Meridian Acquisition Corp sells 20 million units at $10 in its IPO, placing $200 million in trust. Before the IPO its sponsor bought 5 million founder shares for $25,000, so the sponsor holds 20 percent of the 25 million shares outstanding (5 million divided by 25 million) having contributed a little over one hundredth of one percent of the capital. Fourteen months later Meridian announces a merger with a private company.

Dana bought 1,000 Meridian shares on the open market at $12 for $12,000. The trust holds $10.20 a share after interest. If Dana redeems, she receives $10,200, a loss of $1,800 against what she paid; the SEC's warning about buying above trust value is that arithmetic. Suppose public holders of 12 million shares redeem. The trust pays out $122.4 million (12 million times $10.20) and keeps $81.6 million. The sponsor's 5 million founder shares are untouched, so the sponsor now holds 38.5 percent of the 13 million SPAC shares that remain (5 million divided by 13 million), against 20 percent at the IPO, and the combined company receives $81.6 million rather than the $204 million the trust held. Dana, if she stays in, owns 1,000 shares of a company whose value depends entirely on the target's business, alongside a sponsor whose stake cost $25,000.

Pros and Cons

Pros

  • Until a deal closes, a SPAC share is a claim on cash held in trust, and the redemption right lets a holder who dislikes the proposed merger take that cash back instead of staying in.
  • It gives a private company a route to public markets with more certainty about price and terms than a traditional IPO, which the SEC notes is the argument its proponents make.
  • Since 2024 the SEC's rules require disclosure of sponsor compensation, conflicts, dilution and the board's view of the deal, and treat the merger as a sale of securities to the SPAC's shareholders, which attaches liability to the target's disclosure.

Cons

  • The sponsor's stake, acquired for nominal consideration, means the sponsor profits from almost any completed deal, and its percentage of the company grows as public shareholders redeem.
  • Buying SPAC shares on the open market above the trust value means the redemption right returns less than you paid; the premium is a bet on an unknown deal.
  • Warrants can be redeemed by the SPAC once the stock passes a trigger price, and a holder who misses the notice can lose their value entirely.
  • The SPAC has no operating history to evaluate, is not bound to the industry it named, and often needs additional financing that further dilutes public holders; the forward-looking-statement safe harbor is unavailable to blank check companies.

People Also Asked

Answers to the most frequently asked questions.

What happens to my money if a SPAC never finds a company to buy?
The SPAC liquidates and distributes the trust. The SEC's bulletin explains that IPO proceeds are held in the trust or escrow account until the SPAC either completes a de-SPAC transaction or liquidates, and that on liquidation "shareholders at the time of the liquidation will be entitled to their pro rata share of the aggregate amount then on deposit." That is roughly the $10 IPO price per share plus interest, regardless of what you paid on the open market, and the warrants expire worthless.
What is a de-SPAC transaction?
It is the business combination that gives the SPAC a business. The SEC's regulation defines it as "a merger, consolidation, exchange of securities, acquisition of assets, reorganization, or similar transaction, involving a special purpose acquisition company and one or more target companies." It is often structured as a reverse merger in which the target merges into the SPAC or a subsidiary, and afterward the combined company carries on the target's business as a publicly traded company.
How is a SPAC different from a traditional IPO?
In a traditional IPO an operating company with a history sells its own shares to the public. In a SPAC, a shell with no business sells shares first and finds the business later, so IPO investors are relying on the sponsor rather than evaluating a company. The private company then becomes public by merging with the SPAC, a step the SEC says its proponents view as offering more certainty on pricing and terms, and one that comes with the sponsor's promote, redemptions and warrants that an IPO does not have.
Why do SPAC sponsors make money even when investors lose?
Because of how they acquire their stake. The SEC's bulletin notes that sponsors "generally purchase equity in the SPAC at more favorable terms" than public investors, often for nominal consideration, so a sponsor holding a fifth of the shares for a nominal sum profits from a deal that leaves public holders, who supplied nearly all the capital, with shares worth less than $10. That is why the SEC says sponsors "may have an incentive to complete a transaction on terms that may be less favorable to you," and why the 2024 rules require the compensation and dilution to be disclosed.
What are SPAC warrants and can they become worthless?
A warrant is a contract giving the holder the right to buy additional shares from the company at a set price in the future, and SPAC units typically include one or a fraction of one alongside each share. Their terms vary by SPAC, and most allow the SPAC to redeem them once the stock trades above a trigger price, such as $18, for a stated period. The SEC warns that a holder who misses the redemption notice and fails to exercise within the window can be left with warrants that are essentially worthless.

Sources

AdviceOnly maintains high editorial standards to improve the quality and accuracy of our educational content. Content is written with the assistance of artificial intelligence tools following a rigorous quality assurance process, and periodically reviewed by credentialed and experienced human financial advisors. References used include government data, academic papers, interviews with industry experts, and reputable primary sources. You can learn more about our efforts to produce accurate content in our editorial policy.

  1. Code of Federal Regulations. "17 CFR 229.1601 (Item 1601) — Definitions" (Regulation S-K, Subpart 1600).
  2. U.S. Securities and Exchange Commission. "Special Purpose Acquisition Companies, Shell Companies, and Projections" (final rule), 89 FR 14158.
  3. U.S. Securities and Exchange Commission (Investor.gov). "SPACs."
  4. U.S. Securities and Exchange Commission (Investor.gov). "What You Need to Know About SPACs – Updated Investor Bulletin."
  5. U.S. Securities and Exchange Commission (Investor.gov). "Blank Check Company."
  6. Code of Federal Regulations. "17 CFR 230.419 — Offerings by blank check companies" (Rule 419).
  7. Code of Federal Regulations. "17 CFR 240.3a51-1 — Definition of 'penny stock'" (Rule 3a51-1).

Have a question a definition can't answer?

Advice-only advisors answer questions like this for a transparent flat fee — no products, no commissions, no asset management.

Find an Advisor