Special Purpose Acquisition Company
A Special Purpose Acquisition Company (SPAC) is a blank-check shell corporation that raises capital through an initial public offering with no operating business, holding proceeds in trust while searching for a private company to merge with and take public within a defined timeframe, typically two years.
SPACs represent an alternative path to public markets that gained extraordinary popularity in 2020-2021, with hundreds of SPAC IPOs raising over $160 billion at the peak, before facing a sharp regulatory and market correction in 2022-2023. Understanding their mechanics is essential to evaluating any investment in a SPAC or a company that went public through a SPAC merger.
A SPAC IPO works as follows. The SPAC's founders — called sponsors — form the shell company and complete an IPO, typically selling units priced at $10.00 per share. Each unit usually includes one share and a fraction of a warrant (a right to buy additional shares at a fixed price, typically $11.50). After the IPO, the units separate into shares and warrants that trade independently. The IPO proceeds are placed in a trust account invested in US Treasury bills, where they are held for the benefit of shareholders while the SPAC management team searches for an acquisition target.
The sponsor receives a 20% promote — founder shares equal to 20% of the post-IPO equity — at essentially no cost, representing the economic incentive structure that makes sponsoring a SPAC financially attractive even if the subsequent merger performs poorly. This promote is a significant dilution to public shareholders that is often underappreciated at the time of the SPAC IPO.
SPAC shareholders have a key protection: when a merger is announced, they can vote against it and redeem their shares for the trust value (approximately $10 per share plus accrued interest). This redemption right makes SPAC shares function somewhat like a short-duration Treasury instrument with embedded upside optionality if a compelling deal is announced. In the 2020-2021 cycle, institutional arbitrageurs purchased SPAC shares not for the equity upside but for the risk-free trust return, then redeemed while retaining warrants — a dynamic that amplified SPAC issuance.
The de-SPAC transaction (the actual merger of the SPAC with a target company) has come under increased SEC scrutiny. In 2022 and 2024, the SEC adopted rules treating de-SPAC transactions more like traditional IPOs in terms of disclosure obligations and liability standards, addressing long-standing concerns that SPACs allowed companies to go public with rosier financial projections than would be permissible in a traditional IPO prospectus. SPAC activity declined sharply as these regulatory and market headwinds mounted, though the structure remains available and periodically revives for specific deal types.