A company may have far more potential shares than the number currently trading in the market. Stock options, warrants, convertible securities and other equity awards can all increase the share count over time, which can affect ownership percentages and earnings per share. Fully diluted shares help investors see that bigger picture by estimating how many shares could exist if all eligible securities were exercised or converted. Understanding how to calculate this figure can give you a clearer view of a company’s valuation and the potential impact of future dilution.
You can also work with a financial advisor to help you understand all of your assets better and to make a long-term financial goal.
What Are Fully Diluted Shares?
Calculating fully diluted shares starts with identifying securities that could eventually increase the number of common shares outstanding. These may include employee stock options, warrants, convertible preferred stock, convertible bonds and restricted stock units, depending on their terms and whether they can be converted or exercised.
Employee stock options and warrants are typically included when they are exercisable and could result in additional common shares. However, the calculation may account for the cash the company would receive from exercising those securities, which can reduce the net increase in shares under methods such as the treasury stock method.
Convertible securities require a different approach. Convertible bonds and preferred shares may be counted as additional common shares if they can be converted, while the related interest expense or preferred dividends may also need to be adjusted when calculating diluted earnings per share.
Restricted stock units and other equity awards can also contribute to dilution once their vesting or performance conditions are met. Investors should review a company’s financial statements and footnotes carefully because the number of potentially dilutive securities can differ significantly from the number of shares currently outstanding.
How Are Fully Diluted Shares Calculated?
Calculating fully diluted shares means adding together all the common shares and special securities investors hold. For example, say the company in question has 4 million common shares available in the market. Furthermore, the company provides 500,000 shares in stock options, 250,000 shares through convertible securities and 250,000 more in employee stock options. Therefore, the total common shares are 5 million.
Identify Eligible Options and Securities
Sources of dilution are the eligible options and securities that turn into common stock. They typically include:
- Stock Options: Companies can allow employees, contractors, consultants and investors to purchase a specific number of shares at a favorable price. Shares in this scenario are known as stock options and they increase the total number of outstanding shares.
- Convertible Securities: Holders of convertible securities can convert them into common shares at a predetermined conversion ratio. One type of security is a convertible bond. Counting the fully diluted shares means acting as though all existing convertible securities turned into stock.
- Warrants: A warrant is a contract allowing an investor to purchase stock at a preferential price. When warrant-holders exercise this right, the number of outstanding shares increases. However, warrants have an expiration date, meaning the investor must act on the contract before the specified date.
- Restricted Stock Units (RSUs): RSUs are stocks that companies commit to providing to employees upon meeting particular vesting requirements. When RSUs vest and are settled in shares, they contribute to the fully diluted share count.
- Employee Stock Purchase Plans (ESPPs): ESPPs allow employees to purchase company stock at a discounted price. If employees participate in these plans and acquire shares, it increases the fully diluted share count.
Diluted Shares Impact on Earnings Per Share (EPS)
You can calculate each stockholder’s earnings per share (EPS) by dividing the company’s net income (minus dividend payments) by the fully diluted share count. Using the fully diluted share count of 5 million will serve to continue with the example from above.
Say the company posts $23 million net income for the year. It pays preferred shareholders $3 million, meaning the net income to divide amongst the remaining stock is $20 million. So, you divide the net income after dividends ($20 million) by the total common shares (5 million) for a $4.00 EPS adjusted for dilution.
Advantages and Disadvantages of Fully Diluted Shares

Diluting stock has pros and cons for companies and shareholders. Here are the advantages:
- Capital Infusion: Diluting stock is a way for a company to raise additional capital. By issuing more shares and selling them to investors, the company can generate funds to finance its operations, invest in growth opportunities, or fund research and development.
- Reduced Debt Burden: If a company has a significant amount of debt, issuing new shares can be a way to reduce its debt burden. The proceeds from the stock sale can reduce or eliminate debt, leading to lower interest expenses and improved financial stability.
- Acquisition and Expansion: Stock dilution can facilitate mergers and acquisitions. By issuing shares to acquire another company, the acquiring company can expand its operations and improve revenue, leading to increased shareholder value.
- Employee Incentives: Incentive stock options, restricted stock units (RSUs) and other equity-based compensation plans can attract and retain talented employees. These equity incentives can align employee interests with those of shareholders and motivate employees to contribute to the company’s success.
It’s also important to analyze where these shares might not benefit you. Here are the disadvantages:
- Ownership Dilution: The most obvious disadvantage of stock dilution is that it reduces the ownership stake of existing shareholders. When new shares are issued, each existing shareholder’s percentage ownership in the company decreases, requiring them to purchase more stock to maintain the same level of ownership. Otherwise, new investors will snap up shares and get themselves a piece of the pie.
- Earnings Per Share (EPS) Impact: Stock dilution negatively affects a company’s (EPS) because more shares are now outstanding. A lower EPS can lead to a lower stock price, reducing the value of your investment.
- Dilution of Control: If significant stock dilution occurs, it can result in a loss of control for existing shareholders, especially if new shareholders have different agendas or voting preferences.
- Market Perception: Investors may view stock dilution as a signal that the company needs capital urgently or lacks other means to finance its operations. This perception can negatively impact the company’s stock price and reputation.
Bottom Line

Understanding fully diluted shares and their implications is a valuable tool for both companies and investors in the dynamic world of corporate finance. A higher number of fully diluted shares can lead to a lower EPS, which may affect investor sentiment, market perceptions and stock price. However, diluting stock can provide advantages such as raising capital, reducing debt and motivating employees through equity-based compensation plans. As a result, diluted shares aren’t a reason to jump ship when investing, but it’s crucial to account for them when calculating your return on investment.
Tips for Investing
- The stock market is constantly in flux, and it can be challenging to understand what companies are worth an investment. To create a diversified, robust portfolio, talk to a financial advisor. You’ll learn about how share dilution can affect your assets and how to weather economic turbulence. Finding a financial advisor doesn’t have to be hard. SmartAsset’s free tool matches you with vetted financial advisors who serve your area, and you can have a free introductory call with your advisor matches to decide which one you feel is right for you. If you’re ready to find an advisor who can help you achieve your financial goals, get started now.
- If diluted shares sound like a drag, don’t worry, there are other ways to invest in stock. For example, you can invest in an IPO to get the first crack at company shares.
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