What is the difference between a public and private company valuation?

  • Posted by: Frédérique Pardon

A public company valuation and a private company valuation both aim to determine what a business is worth, but they use different methods, data sources, and assumptions. Public companies have market-determined prices and transparent financial disclosures. Private companies lack both, which means valuations rely on comparable data, adjusted financial statements, and professional judgment. The result is that private valuations are inherently less precise and require more interpretation.

Guessing your company’s value is costing you at the negotiating table

When founders and CFOs enter funding rounds, acquisitions, or investor conversations without a credible, well-supported valuation, they negotiate from a weak position. Buyers and investors will anchor on their own numbers, and without a defensible counter-position, you lose leverage. A rough estimate based on revenue multiples you found online is not enough. A proper business valuation, built on the right methodology for your company type, gives you a number you can defend and a story you can tell with confidence.

Using public company benchmarks on a private business inflates your expectations

One of the most common mistakes growing companies make is benchmarking their value against publicly listed peers without adjusting for the fundamental differences between the two. Public companies trade at premiums that reflect liquidity, transparency, and market confidence. Applying those same multiples to a private company produces an inflated figure that will not survive scrutiny from a serious buyer or investor. Understanding where the two valuation approaches diverge is the first step toward arriving at a realistic and credible number.

What is company valuation and why does it matter?

Company valuation is the process of determining the economic value of a business. It draws on financial performance, assets, market position, and future earning potential to arrive at a figure that represents what the business is worth to a buyer, investor, or owner at a specific point in time.

Valuation matters in a wide range of situations: raising capital, selling the business, bringing in a co-founder, structuring employee equity, resolving shareholder disputes, or preparing for a merger or acquisition. Each of these events requires a credible, defensible number that reflects the real state of the business.

Beyond transactions, regular business valuation also serves as a management tool. When you understand what drives your company’s value, you can make better decisions about where to invest, what to fix, and how to prioritize growth. It turns an abstract concept into an actionable strategic input.

What makes a public company valuation different from a private one?

The core difference is information and liquidity. Public companies have real-time share prices, audited financial statements, and continuous market feedback. Private companies have none of these, which means their valuation requires more assumptions, more adjustments, and more professional judgment to produce a reliable figure.

For public companies, the market does much of the valuation work automatically. Share price multiplied by shares outstanding gives you market capitalization instantly. Analysts, institutional investors, and market forces continuously incorporate new information into that price. The valuation is dynamic, transparent, and externally validated.

For private companies, there is no market price. Valuations are point-in-time estimates based on financial models, comparable transactions, and adjusted earnings. The quality of the valuation depends heavily on the quality of the financial data, the expertise of the person performing the analysis, and the assumptions built into the model. Two qualified professionals can arrive at meaningfully different numbers for the same private business.

There is also a structural difference in financial reporting. Public companies are required to publish detailed, audited financials on a regular schedule. Private companies often have less rigorous reporting, which means the first step in any private company valuation is frequently cleaning up and normalizing the financial statements before any analysis can begin.

What valuation methods are used for public vs. private companies?

Both public and private companies can be valued using three core approaches: the income approach, the market approach, and the asset approach. The difference lies in how each method is applied and which data is available to support it.

The income approach centers on discounted cash flow (DCF) analysis. It projects future cash flows and discounts them back to present value using a rate that reflects risk. This method works for both public and private companies, but private company DCF models carry more uncertainty because forecasts rely on internal data rather than analyst consensus estimates.

The market approach compares the business to similar companies or transactions. For public companies, this is straightforward: you pull trading multiples from listed peers. For private companies, you rely on private transaction databases and comparable deals, which are less complete and less timely. Adjustments are required to account for size, growth rate, and risk differences.

The asset approach values the business based on its net assets. It is most relevant for asset-heavy businesses or companies in financial distress. For growth-oriented private companies, this method typically undervalues the business because it does not capture earning potential or intangible value.

In practice, private company valuations often use a combination of methods and then weight the results based on which approach is most appropriate for the business type and purpose of the valuation.

What is a liquidity discount and how does it affect private company value?

A liquidity discount is a reduction applied to a private company’s value to reflect the fact that its shares cannot be easily sold on an open market. Because converting a private equity stake into cash takes time, effort, and often involves significant uncertainty, buyers demand a lower price to compensate for that illiquidity.

In practice, liquidity discounts applied to private company valuations typically range from around 20% to 40%, though the exact figure depends on the company’s size, sector, ownership structure, and how close it is to a potential exit event. A company actively preparing for a sale or IPO will carry a smaller discount than one with no near-term liquidity path.

This discount is one of the main reasons why private companies are valued lower than their public equivalents even when their financial performance is comparable. It is not a reflection of business quality. It is a structural feature of private ownership that any serious buyer or investor will factor into their offer.

Understanding the liquidity discount matters when you are entering negotiations. If you are selling a minority stake, the discount will likely be larger. If you are selling the entire business, it may be smaller or eliminated entirely because the buyer gains full control and a clear path to value realization.

When should a growing company get a formal valuation done?

A growing company should get a formal business valuation before any significant financial event: raising external capital, bringing in a new investor, selling equity to a co-founder or employee, initiating an acquisition, or preparing for a management buyout. These are the moments when an informal estimate is no longer sufficient.

Beyond event-driven triggers, there are strategic reasons to commission a valuation even when no transaction is imminent. If you are setting up an employee share option plan, you need a defensible valuation to establish the exercise price. If you are restructuring ownership or resolving a shareholder dispute, a formal valuation protects all parties.

For fast-growing companies, annual or biannual valuations can also serve as a strategic health check. Tracking how your valuation changes over time, and understanding what is driving those changes, gives leadership a clearer view of where value is being created and where it is being eroded.

In 2026, with increased investor scrutiny and more complex capital structures becoming common even at the scale-up stage, the threshold for “good enough” has risen. Investors expect founders and CFOs to understand their company’s value and the assumptions behind it.

How can a fractional CFO help with your company’s valuation process?

A fractional CFO can lead or support a business valuation by preparing clean financial statements, selecting the right valuation methodology, building the underlying financial model, and stress-testing the assumptions. They bring the financial expertise to make the process credible and the strategic context to make it useful.

Many growing companies do not have the internal finance capacity to run a rigorous valuation process. The work requires clean, normalized financials, a solid understanding of valuation methodology, and the ability to defend the output to investors or buyers. A fractional CFO fills that gap without the cost of a full-time hire.

Beyond the mechanics, an experienced fractional CFO also knows what investors and acquirers look for. They can identify the gaps in your financial story before a counterparty does, and help you address them in advance. That preparation often has a direct impact on the outcome of a funding or transaction process.

If your company is approaching a valuation event and your finance function is not ready to support it, bringing in senior financial expertise on a flexible basis is a practical and cost-effective solution. You get the capability when you need it, without building a team around a one-time requirement.

How Greyt helps with your business valuation

At Greyt, we work with scale-ups and growing businesses that need senior financial expertise at the moments that matter most. When a valuation is on the horizon, whether for a funding round, an acquisition, or a strategic review, we provide the financial leadership to make it happen properly.

Here is what we bring to the process:

  • Experienced fractional and interim CFOs who have led valuation processes across sectors including Tech, Manufacturing, and Professional Services
  • Financial modeling and scenario analysis built on clean, normalized financials
  • Methodology selection and documentation that holds up to investor and buyer scrutiny
  • Strategic preparation: identifying value drivers and closing gaps before a counterparty finds them
  • Flexible engagement from a single project to ongoing support as you approach an exit or capital raise

We do not just produce a number. We help you understand what is behind it and how to use it. You can explore our financial expert services to see how we support companies at every stage of their growth. If you are preparing for a valuation event and want to talk through your situation, get in touch with us and we will help you figure out the right next step.

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