What is a SPAC? Special purpose acquisition companies explained

If you have encountered the term while researching investments or following financial news, this guide will walk you through the mechanics, compare SPACs to traditional IPOs and outline the considerations you should understand before forming any view on these instruments.

The meaning of a special purpose vehicle (SPV) company relates tangentially here. A SPAC is a form of SPV, which serves as a legal structure for specific transactions but differs from a SPAC in fundamental purpose and function.

What does SPAC stand for?

SPAC stands for special purpose acquisition company. You may also hear it called a ‘blank cheque company’ or ‘shell company’ because, at formation, it has no commercial operations. The sole purpose of a SPAC is to raise capital through an initial public offering (IPO) and then use that money to acquire or merge with an existing private company.

The SPAC itself produces nothing, sells nothing and employs few people beyond its management team. Its value proposition rests entirely on the ability of its sponsors to identify and complete a merger with a suitable target business. This distinguishes it from a publicly listed company in the traditional sense, where the entity already operates a functioning business before shares trade publicly.

Think of a SPAC as an empty vessel. Investors provide the fuel by purchasing shares. The sponsors then steer that vessel toward a destination: a private company seeking public status without the traditional IPO process.

How does a SPAC work?

The lifecycle of a SPAC unfolds across three main stages. Each carries specific mechanics and timelines that shape the experience for all parties involved.

The SPAC IPO process

When sponsors form a SPAC, they register it with securities regulators and conduct a SPAC IPO. During this offering, investors purchase units typically priced at a standard amount, often around $10 per unit in US markets. Each unit usually contains one common share plus a fraction of a warrant, which grants the holder the right to buy additional shares at a set price in the future.

The proceeds from this offering go into a trust account. This money sits in government securities or similar low-risk instruments until a target is identified. This does not eliminate risk; SPAC share prices can fall and investors may still lose money. Sponsors cannot use these funds for operating expenses or compensation during the search phase.

Understanding what an IPO is in this context matters because the SPAC IPO differs fundamentally from a traditional one. Investors are not buying into a business with revenues, customers or products. They are buying into a promise: that management will find and execute a worthwhile acquisition.

Finding a target company

Once publicly listed, SPAC management begins searching for a private company to acquire. This phase typically has a deadline, commonly 18 to 24 months from the IPO date. The time pressure exists because investors need certainty about when their capital will either be deployed or returned.

During the search, sponsors evaluate potential targets based on industry, growth prospects and fit with their stated investment thesis. Most SPACs outline a general focus area in their prospectus, such as technology, healthcare or consumer goods, though they retain flexibility to pursue opportunities outside that initial scope.

The de-SPAC merger

The de-SPAC transaction occurs when the SPAC announces its intended merger target and seeks shareholder approval. This process involves regulatory filings, detailed disclosure about the target company and a vote by SPAC shareholders.

Crucially, shareholders who disapprove of the proposed merger can redeem their shares. They receive back their pro-rata portion of the trust account, typically close to the original offering price. This redemption right provides some downside protection, though it introduces complications explored later in the risks section.

If shareholders approve and the merger completes, the combined entity becomes an operating public company. The SPAC stock ticker often changes to reflect the acquired business, and the former SPAC shell ceases to exist as a separate structure.

SPAC vs traditional IPO: Key differences

Understanding the distinction between these two paths to public markets helps clarify why each exists and who might prefer one over the other.

A traditional IPO involves underwriters who help price shares based on investor demand. The company going public participates directly in marketing its shares. The process can be lengthy, expensive and subject to market conditions on the pricing date.

A SPAC merger, by contrast, allows a private company to negotiate terms directly with SPAC sponsors. The target company knows the deal value in advance, reducing uncertainty. However, this convenience comes with trade-offs in terms of sponsor economics and potential dilution.

Why do companies choose to go public via SPAC?

Private companies consider the SPAC route for several practical reasons, though none guarantee a better outcome than traditional alternatives.

Speed ranks highly. A company merging with an already-listed SPAC can reach public markets faster than navigating the full IPO process. For businesses in rapidly evolving sectors, this timing advantage may matter.

Valuation certainty appeals to some management teams. Rather than accepting whatever price emerges from the bookbuilding process, they can lock in terms through direct negotiation.

Market volatility creates another consideration. A traditional IPO can be delayed or repriced if market conditions deteriorate between filing and listing. A SPAC merger, while still subject to market forces, offers somewhat more insulation from day-to-day fluctuations during the deal process.

Finally, some companies believe SPAC sponsors bring strategic value: industry expertise, networks or operational guidance. Whether this proves true varies considerably case by case.

These perceived advantages do not mean SPAC investments are lower risk, and outcomes for public shareholders can be poor.

Risks and considerations when investing in SPACs

SPACs are complex investment structures with inherent risks. Past SPAC performance does not guarantee future results, and these instruments are not suitable for all investors.

Dilution and sponsor incentives

The sponsor promote represents one of the most significant structural features of SPACs. Sponsors typically receive a substantial equity stake, often around 20% of the SPAC shares, for a nominal investment. This founder stake dilutes public shareholders.

Additionally, the warrants included in SPAC units create further dilution when exercised. If the combined company performs well enough for warrant holders to exercise, existing shareholders see their ownership percentage reduced.

This structure means public investors and sponsors have different breakeven points. Sponsors can profit even if the share price declines from the offering price, while public shareholders require appreciation to achieve returns. This misalignment of incentives deserves careful consideration.

Timeframe pressures

The deadline to complete an acquisition creates pressure that can influence deal quality. As the two-year window closes, sponsors face a choice: return money to investors or complete a transaction.

This pressure may lead some sponsors to pursue deals at unfavourable terms rather than accept the reputational impact of failing to find a target. Investors should consider whether announced deals represent genuine opportunities or deadline-driven compromises.

Regulatory and transparency concerns

Historically, companies going public via SPAC faced somewhat different disclosure requirements than traditional IPO candidates. Regulators have increased scrutiny in recent years, but gaps may remain.

Forward-looking projections, which traditional IPO prospectuses largely avoid, have featured prominently in some SPAC merger presentations. These projections carry significant uncertainty, and investors should treat them with appropriate scepticism.

In the US, SEC rules adopted in 2024 removed the distinction between how SPACs and IPOs treated forward-looking projections, by eliminating the safe harbor that had previously protected such statements in de-SPAC transactions.

SPACs and the UK market

UK investors can access SPAC shares listed on international exchanges, subject to their broker’s offerings and any applicable restrictions. Some SPACs have also listed on the London Stock Exchange under rules that regulators have updated to encourage such listings.

The Financial Conduct Authority (FCA) has established specific requirements for SPAC listings in the UK, including shareholder protections and disclosure standards. These rules aim to provide greater certainty for investors while maintaining market integrity.

UK investors considering SPAC investments should understand that most activity has historically occurred in US markets. Currency exposure, different trading hours and varying regulatory frameworks all add complexity beyond the inherent risks of SPACs themselves.

FCA rules set listing/disclosure requirements but do not mean the FCA endorses or guarantees any SPAC investment. Tax treatment of SPAC investments may differ from other equity holdings depending on individual circumstances. Professional advice from a qualified adviser is appropriate before making investment decisions in this area.

Summary: Key points about SPACs

SPACs offer an alternative path to public markets for private companies, but they introduce specific complexities and risks that distinguish them from traditional investments.

Key points to remember:

• A SPAC is a shell company formed solely to raise capital and acquire a private business.

• The SPAC IPO raises funds held in trust until a merger target is identified.

• The de-SPAC process converts the combined entity into an operating public company.

• Sponsor promotes and warrants create dilution for public shareholders.

• Deadline pressures may influence deal quality and terms.

• Redemption rights offer some downside protection but reduce capital available for mergers.

• UK investors can access SPACs but should understand cross-border complexities.

SPACs are not inherently better or worse than traditional IPOs. They represent a different mechanism with distinct trade-offs. Any investment decision should rest on thorough understanding of the specific SPAC, its sponsors, the announced or potential target and your own financial situation and risk tolerance.

This article provides general information only and does not constitute investment advice. You should consider seeking independent financial advice before making any investment decisions.