IPO Alternatives: SPACs, Direct Listings, Reverse Mergers

The traditional IPO has been the gold standard for taking companies public for decades. But it is far from the only option. Over the past ten years, a growing number of companies have bypassed the conventional underwriting process entirely, choosing instead to go public through SPACs, direct listings, or reverse mergers. Each of these alternatives offers a distinct set of trade-offs in terms of speed, cost, regulatory requirements, and the role investment banks play in the transaction.

For anyone preparing for investment banking interviews or working in the industry, understanding these alternatives is no longer optional. Interviewers regularly test whether candidates can explain the differences between a SPAC merger and a traditional IPO, or articulate why a company might choose a direct listing over a conventional offering. Equity capital markets (ECM) groups, M&A teams, and even coverage groups encounter these structures in live transactions.

This article breaks down each IPO alternative in detail: how the mechanics work, what the economics look like, who the key players are, and when each path makes strategic sense. You will also find a comparison table for quick reference and a section on how these topics appear in interviews.

Before diving into the mechanics of each structure, here is a high-level comparison of the four main paths to public markets.

How SPACs Work

A Special Purpose Acquisition Company is a publicly traded shell entity created for the sole purpose of merging with a private company to take it public. The SPAC itself has no operations, no revenue, and no products. It raises capital through its own IPO, deposits that cash into a trust account, and then searches for a private company to acquire within a set deadline (typically 18 to 24 months).

SPAC (Special Purpose Acquisition Company)

A publicly listed shell company that raises capital through an IPO with the sole intent of acquiring or merging with a private operating company within a specified timeframe. The SPAC's founders (sponsors) identify and negotiate the target acquisition, while public shareholders vote on whether to approve the deal or redeem their shares for the trust value.

The SPAC lifecycle has three distinct phases. In the IPO phase, the sponsor forms the entity, files with the SEC, and raises capital from public investors. SPAC IPO investors typically receive units consisting of one share of common stock plus a fraction of a warrant (usually one-half or one-third of a warrant per share). The trust account holds approximately $10 per share, invested in Treasury securities until a deal is announced.

In the target search phase, the sponsor identifies and evaluates potential acquisition targets. The sponsor team, which typically consists of experienced dealmakers, former CEOs, or industry veterans, leverages its network to find companies that want to go public but prefer to avoid the traditional IPO process. This phase can last up to two years, though most sponsors aim to announce a deal within 12 to 18 months to maintain investor confidence.

The de-SPAC phase is where the actual business combination occurs. Once a target is identified, the SPAC and the target negotiate merger terms. The SPAC files a proxy statement (or registration statement on Form S-4) with the SEC, and shareholders vote on the proposed transaction. Shareholders who do not want to participate in the merger can redeem their shares for approximately $10 per share (plus accrued interest) from the trust.

SPAC Economics and the Sponsor Promote

The economic structure of a SPAC creates important incentive dynamics that every banker and interview candidate should understand. The sponsor typically receives a "promote" of 20% of post-IPO equity for a nominal investment (often around $25,000). This means if the SPAC raises $200 million in its IPO, the sponsor receives shares worth approximately $40 million before the de-SPAC transaction even closes.

Additional capital often comes through a PIPE (Private Investment in Public Equity) transaction, where institutional investors commit to buying shares at the time of the de-SPAC merger. PIPEs became increasingly important as redemption rates climbed, because the SPAC trust alone could not always deliver enough capital to close the deal. PIPE investors typically negotiate favorable terms, including warrants or price protections.

The SPAC Market: 2021 Boom to 2025-2026 Recovery

The SPAC market experienced a dramatic boom-and-bust cycle. In 2021, over 600 SPACs went public and raised more than $160 billion, an unprecedented surge driven by low interest rates, abundant liquidity, and celebrity sponsors entering the market. By 2022-2023, the market collapsed under the weight of poor-performing de-SPAC companies, SEC investigations, and investor skepticism.

The recovery has been meaningful but more disciplined. In 2025, approximately 133 new SPAC IPOs closed, roughly double the total from 2024, raising over $20 billion collectively. SPACs accounted for around 38% of the overall IPO market. Heading into 2026, the pipeline remains active, with over 200 private companies expressing interest in going public via SPAC and more than 100 business combinations announced. The new generation of SPACs features stronger sponsors, improved governance, and more selective investors.

SEC Regulation of SPACs (2025 Rules)

In January 2024, the SEC adopted final rules that significantly enhanced disclosure requirements for SPAC IPOs and de-SPAC transactions. These rules, which became effective on July 1, 2025, aim to align de-SPAC disclosures with traditional IPO standards. Key provisions include:

These regulatory changes have made the SPAC process more rigorous but also more credible, addressing the "regulatory arbitrage" criticism that SPACs previously offered a lower-scrutiny path to public markets than traditional IPOs.

How Direct Listings Work

A direct listing allows a company to list its existing shares on a stock exchange without issuing new shares, without hiring underwriters, and without conducting a traditional roadshow. Instead of the bookbuilding process used in IPOs, the stock price on day one is determined entirely by supply and demand in the open market.

Direct Listing

A process by which a company lists its existing shares on a public stock exchange without raising new capital or using investment bank underwriters. Existing shareholders (founders, employees, early investors) can sell their shares directly to the public starting on the first day of trading, with the opening price determined by market supply and demand rather than a negotiated offering price.

In a direct listing, the company works with financial advisors (not underwriters) to prepare the necessary SEC filings, establish a reference price, and coordinate with the exchange. On the first trading day, the exchange's designated market maker (DMM) facilitates an opening auction, matching buy and sell orders to establish the opening price.

The reference price set before trading is not an offering price; it is simply a benchmark to help investors gauge the stock's approximate value. The actual opening price can differ significantly from the reference price depending on market demand.

Notable Direct Listing Examples

Spotify (April 2018) was the first major company to use a direct listing on the NYSE. The company set a reference price of $132 per share and opened at $165.90, a 25.7% premium. Spotify paid approximately $35 million in financial advisory fees, far less than the estimated $100-200 million it would have paid in traditional IPO underwriting fees on a deal of that size. Spotify chose this path because it did not need to raise capital and wanted to avoid the lockup restrictions and underpricing that characterize traditional IPOs.

Slack (June 2019) followed Spotify's model, listing directly on the NYSE with a reference price of $26 per share and opening at $38.50. Like Spotify, Slack did not need external capital and wanted immediate liquidity for all shareholders without lockup periods. Slack paid approximately $22 million in advisory fees.

Coinbase (April 2021) chose a direct listing on Nasdaq with a reference price of $250 per share and opened at $381. The listing valued the crypto exchange at approximately $86 billion at closing on day one (shares briefly reached $429.54 intraday, pushing the valuation above $100 billion), making it the largest direct listing by market capitalization.

Palantir and Asana (September 2020) both went public via direct listings on the same day, each on the NYSE, further demonstrating that the structure was gaining acceptance beyond the initial Spotify precedent.

Advantages and Disadvantages of Direct Listings

Direct listings offer several clear benefits. No dilution occurs because no new shares are issued (unless the company opts for the primary capital raise feature). No lockup period means all existing shareholders can sell from day one, unlike the 90-to-180-day lockup in traditional IPOs. Lower fees result from not paying underwriting commissions, though advisory fees still apply. And market-driven pricing eliminates the deliberate underpricing (the "IPO pop") that effectively transfers wealth from the issuing company to institutional IPO investors.

The disadvantages are equally significant. No guaranteed demand exists because there is no bookbuilding process or underwriter commitment to sell shares. No price stabilization means there is no greenshoe option or market maker support if the stock drops after listing. Limited marketing means the company relies on its existing brand recognition rather than a structured roadshow to generate investor interest. And only established companies qualify in practice, since a company needs sufficient public awareness and existing investor interest to generate demand without a coordinated selling effort.

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How Reverse Mergers Work

A reverse merger is a transaction in which a private company acquires or merges with an existing public company (typically a shell company with no active operations) to gain public listing status. Despite the private company being the economic acquirer, the public shell is technically the legal acquirer, allowing the private company to "inherit" the shell's public listing without going through the SEC registration process required for an IPO.

Reverse Merger

A transaction in which a private operating company merges with a publicly listed shell company, resulting in the private company's shareholders owning a majority of the combined entity. The private company effectively becomes public by taking over the shell's existing stock exchange listing, bypassing the traditional IPO underwriting and marketing process.

The mechanics work as follows. The private company identifies a suitable public shell, which is typically a formerly operating company that has ceased business activities but maintained its SEC reporting status and stock exchange listing. The two entities negotiate merger terms, with the private company's shareholders receiving a controlling stake (often 80-95%) of the combined entity. After the merger closes, the combined company changes its name, ticker symbol, management team, and business description to reflect the private company's operations.

Shell Company Identification and Due Diligence

Finding the right shell company is one of the most critical steps. Shells come from several sources: formerly operating businesses that wound down operations, companies that completed asset sales but retained their listing, or entities specifically created to serve as merger vehicles. Brokers and specialized advisors maintain inventories of available shells.

Due diligence on the shell is essential and frequently underestimated. Bankers and advisors must investigate:

SEC Requirements and Post-Merger Obligations

While a reverse merger bypasses the IPO registration process, it does not eliminate regulatory obligations. The most important post-merger filing is the "Super 8-K," which must be filed within four business days of the merger closing. This filing effectively serves as the company's IPO-equivalent disclosure document, containing:

Under Nasdaq Rule 5110(c), a reverse merger company generally must trade for at least one year on the OTC markets or another exchange, file at least one full year of post-merger SEC periodic reports, and maintain the applicable share price requirement for at least 30 of the prior 60 trading days before it can uplist to a major exchange.

Additionally, following SEC rules adopted in 2024, affiliates of the private company who receive shares in the merger are treated as statutory underwriters. Restricted securities received in the transaction cannot be included in resale registration statements until one year after the Super 8-K is filed.

Notable Reverse Merger Examples

Trump Media & Technology Group (TMTG) / DWAC (2024) is the most high-profile recent example, though it was technically a SPAC merger rather than a traditional reverse merger. Digital World Acquisition Corp (DWAC) merged with TMTG in March 2024, with the combined company trading under the ticker DJT on Nasdaq. The deal valued the combined entity at approximately $8 billion at closing, with Trump holding roughly 79 million shares worth approximately $4 billion at the time. The process took over two years due to SEC investigations and regulatory scrutiny.

Burger King / Justice Holdings (2012) saw the fast-food chain go public again through a reverse merger with Justice Holdings, a London-listed shell company. The deal valued Burger King at approximately $8.1 billion and was backed by 3G Capital.

Dell Technologies (2018) executed a complex reverse merger with its tracking stock VMware to return to public markets after going private in 2013. The deal valued Dell at approximately $21.7 billion and allowed founder Michael Dell and Silver Lake Partners to bring the company back to public markets on their own terms.

The role of investment banks varies dramatically across these alternatives, which directly impacts fee revenue, headcount allocation, and the types of transactions analysts and associates work on.

Traditional IPO

Banks serve as underwriters, taking on risk by committing to purchase and resell shares. They manage the entire process: due diligence, S-1 drafting, roadshow, bookbuilding, pricing, and aftermarket stabilization. Fees are 3-7% of gross proceeds, making this the most lucrative advisory role per transaction. ECM teams lead the execution, coordinating with coverage groups and the sales and trading desk.

SPAC Transactions

Banks play dual roles. In the SPAC IPO, banks underwrite the blank-check company's initial offering, earning standard IPO fees (typically 2% paid at IPO closing plus 3.5% deferred until the de-SPAC transaction completes, totaling approximately 5.5%). In the de-SPAC merger, banks often serve as advisors to either the SPAC or the target, earning M&A advisory fees. They may also arrange the PIPE financing. Under the SEC's 2025 rules, SPAC IPO underwriters may face extended liability into the de-SPAC phase, which has made some banks more selective about which SPACs they underwrite.

Direct Listings

Banks serve as financial advisors, not underwriters. They help prepare SEC filings, establish the reference price, coordinate with the exchange, and provide investor education. Because there is no underwriting risk or bookbuilding, fees are significantly lower: Spotify paid approximately $35 million and Slack approximately $22 million in advisory fees. For banks, direct listings generate less revenue per deal but require less capital commitment and risk.

Reverse Mergers

Traditional investment banks are rarely involved in reverse mergers, particularly small ones. Specialized advisors, brokers, and boutique firms typically facilitate these transactions. Fees are minimal by investment banking standards, often $500,000 to $2 million for the transaction itself. However, banks may become involved in subsequent capital raises or uplisting transactions once the company has established its public trading history.

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The decision to use one structure over another depends on several factors, and understanding this decision framework demonstrates sophisticated thinking in interviews.

Traditional IPO is best when the company wants to raise significant primary capital, has a compelling growth story that benefits from a structured roadshow, and is large enough to justify the cost. Companies with strong institutional investor interest and a need for brand-building through the IPO marketing process gravitate toward this path. Most companies valued above $1 billion with meaningful capital needs still choose the traditional route.

SPACs make sense when the company wants price certainty (the merger price is negotiated upfront rather than set by market demand on day one), when speed matters (3-6 months vs. 4-6+ months for an IPO), or when the company's story is complex and benefits from the ability to share forward-looking projections in marketing materials. SPACs are also attractive for companies in pre-revenue stages (common in biotech, space technology, and EV companies during 2020-2021) where traditional IPO investors might demand a steeper discount.

Direct listings are ideal when the company does not need to raise new capital, has sufficient brand recognition to generate organic investor demand, and wants to avoid dilution and lockup restrictions. Companies with large employee shareholder bases benefit because all holders can sell from day one. This path is realistic only for well-known companies with strong public profiles, which is why it has been dominated by household names like Spotify and Coinbase.

Reverse mergers suit smaller companies that want public listing status quickly and cheaply, often as a stepping stone to eventual uplisting on a major exchange. Companies in niche industries, international firms seeking U.S. market access, and businesses that plan to raise capital through secondary offerings after becoming public sometimes choose this route. The trade-off is a lower-quality listing initially (typically OTC markets) and the reputational baggage associated with shell company transactions.

IPO alternatives are tested frequently in investment banking interviews, particularly for ECM roles and generalist positions at banks active in SPAC transactions. Here are the most common question formats and how to approach them.

"Walk me through the differences between an IPO, SPAC, and direct listing." Use the comparison framework from this article. Start with the traditional IPO as the baseline, then explain each alternative by highlighting what it changes: SPACs eliminate the roadshow and provide price certainty; direct listings eliminate underwriters and lockups; reverse mergers provide the fastest and cheapest path but with the least scrutiny and no capital raising.

"Why would a company choose a SPAC over a traditional IPO?" Focus on three factors: price certainty (negotiated vs. market-driven), the ability to share forward projections, and speed. Mention that pre-revenue companies often prefer SPACs because traditional IPO investors are skeptical of unproven business models. Acknowledge the dilution trade-off from the sponsor promote and redemptions.

"What happened to the SPAC market and where is it now?" Demonstrate you understand the full cycle: 2021 boom (600+ SPACs, $160 billion raised), 2022-2023 crash (poor de-SPAC performance, regulatory crackdown), and 2025-2026 recovery (133 SPACs in 2025 raising $20 billion+, stronger sponsors, SEC rules effective July 2025 aligning de-SPAC disclosure with IPOs).

"What are the risks of a direct listing?" No guaranteed demand, no price stabilization, no underwriter support, and limited marketing. The company must have strong brand recognition and existing investor interest. If something goes wrong on day one, there is no greenshoe option to support the price.

The traditional IPO remains the dominant path to public markets, but it is no longer the only serious option. SPACs have matured from a niche structure into a mainstream alternative with institutional backing, even after the painful correction of 2022-2023. Direct listings have proven viable for large, well-known companies that prioritize shareholder flexibility over capital raising. And reverse mergers continue to serve smaller companies seeking a faster, cheaper entry to public trading, despite the associated reputational considerations.

For investment banking professionals and candidates, the key is understanding not just how each structure works mechanically, but why a company would choose one over another in a given situation. The trade-offs between speed, cost, certainty, dilution, regulatory scrutiny, and banker involvement create a decision matrix that varies by company size, capital needs, brand recognition, and strategic objectives. Being able to discuss these trade-offs fluently, with real-world examples and current market context, signals the kind of capital markets awareness that banks value in their analysts and associates.