Every year, hundreds of private companies face the same fork in the road: go public the traditional way, or merge with a Special Purpose Acquisition Company (SPAC). Both routes lead to the same destination, a public listing, but the path, timeline, and risks look very different. Understanding those differences is the first step to choosing the right one for your company.
What Is a Traditional IPO, and How Does It Work?
A traditional Initial Public Offering (IPO) is the process by which a private company sells shares to the public for the first time, typically with the help of investment banks acting as underwriters. The process usually unfolds over 12 to 18 months and involves drafting a registration statement (Form S-1), rounds of SEC review, a roadshow to pitch institutional investors, and final price discovery on the night before the stock begins trading.
Because the company’s financials, business model, and risk factors are scrutinized line by line by regulators and underwriters alike, a traditional IPO tends to signal a high degree of market and regulatory validation. That scrutiny is also what makes it slow, expensive, and unpredictable, pricing can shift right up until the morning of the listing, and market volatility in the weeks before launch can force a delay entirely.
What Is a SPAC, and How Does It Work?
A SPAC, often called a “blank check company”, is a shell corporation that raises money through its own IPO with no underlying business. Investors buy units, usually priced at $10, consisting of a share and a partial warrant. The SPAC then has a set window, typically 18 to 24 months, to find and merge with a private operating company. Once a target is identified, the two companies combine through a reverse merger, and the private company effectively “becomes” the already-public SPAC, trading under a new ticker.
Because the private company is merging into an already-listed shell rather than going through a fresh SEC review process, the path to trading is generally faster and gives the company more room to negotiate valuation directly with SPAC sponsors rather than relying on last-minute investor demand.
SPAC vs. Traditional IPO: Key Differences
| Traditional IPO | SPAC Merger | |
| Timeline | 12–18 months | 4–6 months post-target-selection |
| Price discovery | Market-driven, set night before listing | Negotiated directly with sponsor |
| Regulatory scrutiny | Extensive S-1 review | Lighter S-4/proxy review |
| Cost structure | Underwriting fees (~5–7%) | Sponsor promote (~20% founder shares) + fees |
| Certainty of closing | High once priced | Subject to shareholder redemptions |
| Forward-looking guidance | Restricted | Permitted (safe harbor protections) |
Difference in Timelines and Outcomes
The clearest practical difference is speed. A traditional IPO can take well over a year from initial filing to first trade, with the company largely at the mercy of market windows, a hot IPO market can close within weeks, stranding companies mid-process. A SPAC merger, once a target is selected, can often close in four to six months, and because pricing is negotiated privately with the sponsor rather than discovered through a live roadshow, companies get more certainty over valuation earlier in the process. The tradeoff is that SPAC deals are exposed to shareholder redemption risk, investors in the SPAC can pull their money out before the merger closes, sometimes leaving less cash in the deal than originally planned.
Pros and Risks of Going Public via SPAC
Pros:
- Faster path to public markets, often half the time of a traditional IPO
- Valuation is negotiated directly, reducing pricing volatility risk
- Companies can share forward-looking financial projections, which is restricted in a traditional IPO
- Useful for companies in industries (biotech, EVs, early-stage tech) where near-term revenue is limited but future potential is a key story
Risks:
- High redemption rates can shrink the cash the company actually receives
- Sponsor “promote” shares (commonly 20%) dilute existing shareholders
- Post-merger stock performance has been historically volatile, and many SPAC mergers have traded below their $10 offer price
- Compressed diligence timelines can mean private companies go public before their financial reporting, controls, and audit processes are truly ready, a gap that shows up quickly once quarterly reporting begins
Pros and Risks of a Traditional IPO
Pros:
- Market-tested pricing tends to reflect genuine investor demand
- Rigorous underwriting and SEC review can build long-term credibility with institutional investors
- No sponsor promote or founder-share dilution
Risks:
- Long, expensive process with significant legal and underwriting fees
- Exposed to market timing, a downturn during the roadshow can force a delay or a lower price
- Less room to discuss forward guidance, which can make the growth story harder to tell to public investors unfamiliar with the business
2026 Market Outlook for SPACs vs. IPOs
SPAC activity has been rebuilding steadily since the sharp pullback of 2022–2023, with sponsors returning with smaller, more disciplined deal structures and tighter target criteria. At the same time, the traditional IPO market has seen a cautious reopening, with several high-profile listings testing investor appetite. For companies weighing their options in 2026, the practical calculus often comes down to readiness and timing rather than which structure is inherently “better” a company with clean financials and a strong growth story can succeed either way, while one that isn’t audit-ready is likely to struggle regardless of the path chosen.
A Real Example: Sandbridge Acquisition and Owlet Baby Care
Sandbridge Acquisition Corporation, a SPAC formed by Los Angeles-based private equity firm Sandbridge Capital, offers a useful real-world illustration of how a SPAC deal comes together. Sandbridge filed with the SEC to raise up to $200 million, targeting a consumer business that could benefit from accelerating digitization and omni-channel transformation, and priced its $200 million IPO in September 2020, offering 20 million units at $10 each.
Roughly five months later, Sandbridge announced plans to merge with baby care technology company Owlet Baby Care, valuing the combined company at just over $1 billion in enterprise value. The deal brought $230 million from Sandbridge’s trust, plus an additional $130 million raised through a private placement (PIPE). The merger was expected to close in the second quarter of 2021, with the combined company trading on the NYSE under the ticker “OWLT.”
The timeline is instructive: from SPAC IPO to merger announcement to closing took roughly ten months — well inside the typical range for a traditional IPO’s pre-listing process alone, and a clear demonstration of the speed advantage SPACs can offer a private company that’s ready to move.
Which Path Is Right for Your Company?
The right structure depends less on which route is “faster” or “cheaper” in the abstract, and more on your company’s actual readiness: how mature your financial reporting is, whether your controls can withstand public-company-level scrutiny, and how confident you are in your growth story holding up under either a roadshow or a merger proxy review. Companies with clean books and a straightforward growth narrative often do well with either path. Companies still building out financial infrastructure may find the SPAC route’s speed becomes a liability rather than an advantage if reporting gaps surface after the deal closes.
Get Help Taking Your Company Public
Whether you’re evaluating a SPAC merger, a traditional IPO, or trying to determine which one fits your company’s stage and goals, Sandbridge Acquisition can help you think through the tradeoffs, assess readiness, and build a realistic path to the public markets. Reach out to start the conversation.