IPO vs Direct Listing vs SPAC: Which Route to Public Markets

Going public is not one decision. It is at least three distinct transactions with different costs, different dilution, different certainty, and different consequences for existing shareholders.

The choice is frequently made on advice from people who are paid differently depending on the answer, which is a reason to understand the mechanics yourself before the conversation starts.

This guide covers what each route actually is, where each fits, what it costs, what the preparation timeline looks like, and — the part most often skipped — what being a public company requires regardless of how you get there.

1. The Traditional IPO

The company sells newly issued shares to investors through underwriters, and the shares begin trading.

How it works

1. Organisational meeting and drafting. Underwriters, counsel and auditors prepare a registration statement.
2. SEC review. Confidential submission is available to many issuers, with comment rounds over several months.
3. Testing the waters. Permitted meetings with institutional investors to gauge appetite before public filing.
4. Roadshow. Management presents to institutions over one to two weeks.
5. Bookbuilding and pricing. Underwriters collect indications of interest, then set a price the night before trading.
6. Allocation. Underwriters decide which institutions receive shares — a genuinely valuable power.
7. Trading, stabilisation and the over-allotment option, which lets underwriters sell additional shares.

The economics

Underwriting fees are the visible cost, historically around 7% of gross proceeds for mid-sized offerings and lower as deal size grows. Add legal, audit, printing, exchange and advisory costs.

The larger and more contested cost is underpricing. Shares are typically priced below where they trade, and the first-day rise — celebrated in headlines — is money that went to allocated investors rather than to the company. Whether this is a necessary cost of building a stable shareholder base or a transfer of value to the underwriters' clients is a long-running argument, and it is the argument that produced direct listings.

What you get

• Primary capital, in a defined amount
• A curated institutional shareholder base
• Research coverage and stabilisation support
• Price certainty before trading opens

Lockups

Existing shareholders and employees are typically restricted from selling for around 180 days. The expiry is a known event that frequently pressures the price. Staggered and early-release structures have become more common.

2. The Direct Listing

Existing shares are registered and begin trading without an underwritten offering. Originally used only for secondary sales; exchanges have since permitted structures allowing the company to raise primary capital at the same time.

Where it fits

• You do not urgently need capital, or can raise it privately on better terms
• You already have brand recognition, so you do not need a roadshow to create demand
• You have enough shareholders to create real trading liquidity from day one
• You object to underpricing and want the market to set the price

Advantages

• No underwriting spread on an offering that does not happen
• No pricing discount — price is discovered by the market at open
• Typically no lockup, so employees and early investors can sell immediately, which is a substantial and under-appreciated benefit for people who have waited a decade
• No allocation process deciding who gets in

Disadvantages

• Less certainty — no committed book before trading
• Potential volatility without stabilisation
• No underwriter marketing effort, so it only works if demand already exists
• Advisors are still required and still expensive

Direct listings suit a narrow band of companies: well known, well capitalised, with an existing shareholder base broad enough to trade.

3. The SPAC Merger

A special purpose acquisition company raises money into a trust, lists, and then merges with a private company, which becomes public through the combination.

How it works

1. Sponsors raise a blank-cheque vehicle and list it
2. Proceeds sit in trust while the sponsor searches, typically for up to two years
3. A target is identified and a business combination announced
4. Additional capital is frequently raised through a concurrent private placement to institutions
5. SPAC shareholders vote and may redeem their shares for the trust value
6. The combination closes and the target trades publicly

The economics people miss

• Sponsor promote. Sponsors traditionally receive founder shares equal to roughly 20% of the SPAC's pre-combination equity for a nominal amount. That is dilution borne by the target's shareholders.
• Redemptions. Shareholders can withdraw at the vote. In difficult markets redemption rates have been extremely high, meaning the cash actually delivered can be a small fraction of the headline trust. This is the single most important number to model, and it is not knowable in advance.
• Warrants issued to SPAC investors create further dilution on exercise.
• The private placement is frequently what makes the deal viable — and it prices independently, sometimes at a discount.

The 2024 rule change

The SEC adopted rules in 2024 substantially tightening SPAC transactions. Among the most consequential: the statutory safe harbour for forward-looking statements under the Private Securities Litigation Reform Act was made unavailable for these transactions, alongside enhanced disclosure requirements and provisions addressing underwriter status and liability.

This matters because a principal attraction of the SPAC route was the ability to present multi-year projections in a way a traditional IPO does not permit. Removing that safe harbour materially increased liability exposure for forward-looking claims and removed much of the structural advantage.

Where a SPAC can still make sense

• Capital-intensive, pre-revenue businesses where a conventional IPO is not available
• Situations where a specific sponsor brings genuine operational expertise and credibility
• Companies wanting speed and negotiated certainty on valuation — subject to the redemption risk above

4. Reverse Merger Into a Shell

Merging into an existing listed company with minimal operations. Cheaper and faster than any of the above, common in biotech when the IPO window is closed and a listed company with cash but a failed programme is available.

The cautions are real: shell companies carry legacy liabilities, the shareholder base may be unsuitable, listing standards must still be met, and the reputational history of some shells is poor. Diligence on the shell is as important as diligence on the business.

5. The Preparation Timeline

The route is the last decision, not the first. Almost everything that determines whether a listing is even available happens in the two years beforehand, and it is the same work regardless of which route you eventually take.

Twenty-four to eighteen months out — the financial foundation. Audits to public company standards for the required historical periods, which means engaging an auditor capable of that work and, frequently, re-auditing prior years. Companies that used a small local firm discover here that their historical financials need to be redone, and that is a year of elapsed time nobody planned for.

Eighteen to twelve months out — the finance function. A CFO with public company experience, a controller, and a close process that can produce reliable numbers within weeks rather than months. Internal control over financial reporting has to be documented and tested. This is the largest single build, and it is a genuine step change from private company reporting.

Twelve to nine months out — governance. Independent directors recruited, an audit committee with a qualified financial expert, a compensation committee, and the charters and policies that go with them. Board recruitment takes longer than founders expect, and rushing it produces directors who are available rather than useful — see our guide to board composition.

Nine to six months out — the record. Corporate housekeeping: every consent signed, every grant properly approved, the cap table reconciled to the documents, material contracts assembled, and any historical securities issue identified and resolved. This is the same clean-up as any diligence exercise, run to a higher standard.

Six months out — the transaction. Bankers or advisors selected, drafting begins, confidential submission goes in. Only now does the route choice become concrete, and it should be made with a real view of market conditions rather than a decision taken eighteen months earlier.

The pattern worth noticing: a company that has done the first four phases has genuine optionality — it can list, sell, raise privately or wait for a better window. A company that has not done them has one option, which is to wait.

6. What Being Public Actually Requires

Independent of route, the obligations are the same — and companies routinely underestimate them.

• Audited financials to public company standards, with the required historical periods
• Internal control over financial reporting, with management assessment and, once you exceed accommodation thresholds, auditor attestation
• A finance organisation capable of closing fast enough to report quarterly — a step change from private company reporting
• Board independence and committees, including an audit committee with a financial expert
• An investor relations function, guidance policy and disclosure controls — a formalised version of what our guide to private-company IR describes
• Ongoing reporting — annual, quarterly and current reports, proxy statements, insider reporting
• Directors and officers insurance at public company levels, which is a materially larger cost than private cover — see our guide to startup insurance

Preparation typically begins twelve to twenty-four months before any listing. Companies that start six months out are the ones that miss windows.

7. Choosing

• Need primary capital and want certainty and a curated shareholder base → traditional IPO
• Do not need capital, have brand and existing liquidity, object to the pricing discount → direct listing
• Cannot access a conventional IPO, need a negotiated valuation, and a specific sponsor adds genuine value → SPAC, with the redemption risk modelled honestly
• Need a listing cheaply and quickly, with a clean shell available → reverse merger
• Want liquidity for employees and early investors without going public at all → a tender offer, which solves that problem directly and far more cheaply

That last option deserves more attention than it gets. A great many companies pursue a listing primarily to give shareholders liquidity, when a structured secondary would achieve most of it without the permanent obligations.

Frequently Asked Questions

How long does an IPO take?

Roughly six to twelve months from a serious start, assuming financials and controls are already in order. If they are not, add a year. Confidential submission means much of the process is invisible until close to launch.

What does it cost?

Underwriting fees plus several million dollars of legal, audit and other transaction costs for a typical offering, and then a substantial recurring annual cost of being public — additional finance staff, audit, insurance, legal and IR. The recurring cost is what most surprises companies.

Can employees sell immediately?

In an IPO, generally not until the lockup expires, commonly around 180 days. In a direct listing, typically yes at the open, which is one of its strongest advantages for long-tenured employees.

Do SPACs still happen?

Yes, at far lower volume than the peak and with materially different terms — higher sponsor risk capital, structures addressing redemption, and greater scrutiny after the 2024 rules. They remain a legitimate route for specific situations rather than a general alternative to an IPO.

What happens to preferred stock at listing?

It converts to common on a qualifying listing, which is why liquidation preferences generally disappear at IPO. The definition of “qualifying” — minimum offering size and price — sits in your charter and is worth reading well before you need it.

What actually is the IPO window, and how do we read it?

It is shorthand for periods when institutional appetite for new issues is strong enough that offerings price in range and trade well. It opens and closes on conditions nobody controls — volatility, rate expectations, how recent listings have performed. The practical implication is that you cannot time it, only be ready for it. Companies that complete the preparation work described above can move within months when a window opens; companies that start preparing when they see one has opened will miss it, because the audits alone take longer than the window usually stays open.

Should we hire a CFO with public company experience before we decide?

Yes, and earlier than feels comfortable — typically twelve to eighteen months out. The reason is not the transaction itself but the reporting infrastructure, which takes that long to build and cannot be compressed. A CFO who has done it before also knows which of the auditor's and banker's requests are genuinely necessary, which is worth a great deal during a process where every advisor has an incentive to ask for more. A fractional CFO is not the answer at this stage; this is a full-time build.

Do we need to be profitable?

No, and many companies list while loss-making. What markets require instead is a credible path — a growth rate, a gross margin structure and a spending trajectory that make profitability arithmetically plausible within a visible horizon. What has changed is how much patience there is for the story: appetite for growth without a margin path is materially lower than it was, and companies whose unit economics do not work at scale find the conversation ends quickly regardless of growth rate.

What are the alternatives if the window is closed?

Three realistic ones. A late-stage private round, which is slower and dilutive but avoids permanent obligations. A tender offer, which solves the shareholder liquidity problem directly — and if liquidity was the actual motivation, this is usually the better answer anyway. Or a sale, which is a different outcome entirely but sometimes the honest one; our guide to selling your company covers that path. What is rarely wise is forcing a listing into a hostile market to meet an investor's fund timeline.

How does a listing affect our existing investors?

Their preferred converts to common, so protective provisions and liquidation preferences fall away, and their position becomes a marketable security subject to lockup. For funds nearing the end of their life this is exactly the outcome they need, since they can distribute shares to LPs. It also means the investor who has been most supportive during difficult years may become a seller shortly after listing, which is not disloyalty but the structure working as designed — and it is worth understanding when reading the register in your first year public.

The Bottom Line

Start with whether you need primary capital. If you do, an IPO buys certainty and a shareholder base at the cost of fees and underpricing. If you do not, a direct listing avoids both.

SPACs are narrower than they were, and the 2024 rules removed much of what made them structurally attractive. And if the real goal is shareholder liquidity rather than public currency, a tender offer may serve you better than any of them.

Global Capital Network connects growth companies with investors, bankers and advisors across our network and events. Get in touch.

This article is general information, not legal or financial advice. Securities regulation is complex and changes. Engage qualified counsel and advisers before pursuing any listing.