Most companies go public because they have a business to sell to investors. A SPAC does it backwards: it sells the promise of a business it hasn't found yet. Understanding this strange, popular structure explains a good deal about how companies reach the stock market — and why "shortcut" and "good deal" aren't the same thing.

What a SPAC is

A SPAC — special purpose acquisition company — is a shell company with no commercial operations that raises money through an IPO for one purpose: to buy or merge with a private company and thereby bring it onto the stock market, as Investopedia defines it. It's often called a "blank-check company," because investors hand over money before knowing what it will actually buy.

The people who create and run a SPAC are its sponsors — typically experienced investors or executives whose reputation is the pitch. In effect, backers are betting on the sponsors' ability to find a good target.

How the process works

The mechanics unfold in stages:

  1. The IPO. The SPAC raises cash by selling shares to the public, usually at a standard price (commonly $10 a share). The money is placed in a trust, held safely while the sponsors hunt.
  2. The search. The sponsors look for a private company to acquire, generally within a set deadline — often about two years.
  3. The merger (the "de-SPAC"). When they find a target, they negotiate a deal. Once completed, the private company effectively takes the SPAC's stock-market listing and becomes public — bypassing the traditional IPO process.
  4. If they fail. If no deal is done in time, the SPAC is liquidated and, in principle, investors get their money back from the trust.

Why SPACs appeal — to different people

The structure exists because it offers something to each side:

  • For the target company, it can be a faster, more flexible route to going public than a traditional IPO, with the price negotiated directly with the sponsor rather than left to a volatile IPO market.
  • For sponsors, the rewards can be large: they typically receive a sizable stake (the "promote") for putting the deal together — which is also the source of much of the criticism.
  • For public investors, the pitch is a chance to get in early on a company before or as it goes public.

The catch — and the warnings

SPACs have a checkered record, and regulators have repeatedly cautioned investors. The SEC has warned that the interests of sponsors and early backers can differ sharply from those of ordinary investors, and that celebrity involvement is no guarantee a deal is sound, in its investor bulletin on SPACs. Key concerns include:

  • Misaligned incentives. Sponsors often profit handsomely just for completing a deal — creating pressure to do one even if it isn't a great one.
  • Dilution. The sponsor's promote and other features can water down the value held by ordinary shareholders.
  • Weaker scrutiny. Because a de-SPAC merger isn't a standard IPO, the target has sometimes faced less rigorous vetting — and a number of companies that went public this way later disappointed badly.

The structure had a huge boom around 2020–2021, followed by a wave of poor performance that soured many investors — a real-time lesson in the risks.

Why it matters

For investors, a SPAC is a bet on people, not yet on a business — and the fine print, especially the sponsor's cut and the incentives it creates, matters enormously. For companies, it remains a genuine alternative path to public markets, useful in the right circumstances. And for anyone watching the market, the SPAC boom and bust is a compact case study in how a clever financial structure can outrun the quality of the deals it produces. Boursel gives no investment advice; the essential point is to know what you're buying — in a SPAC's early life, that's a pile of cash and a promise, and the value depends entirely on what the sponsors do with it.