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August 26, 2026
How do I calculate each shareholder’s ownership percentage?
To calculate a shareholder’s ownership percentage, divide the number of shares they own by the company’s total issued shares, then multiply the result by 100.
The basic formula is:
Shareholder’s shares ÷ total issued shares × 100 = ownership percentage
For example, if a shareholder owns 25 shares and the company has issued 100 shares:
25 ÷ 100 × 100 = 25%
The shareholder owns 25% of the company’s issued shares.
Before calculating the percentages, confirm:
The company’s register of members should provide the primary record of its current shareholders and their holdings.
A company has issued 100 ordinary shares, and one shareholder owns all 100.
The calculation is:
100 ÷ 100 × 100 = 100%
The shareholder owns 100% of the company.
A company could also issue only one ordinary share to its sole owner. One share out of one still represents 100% ownership.
A company has issued 100 identical ordinary shares:
The calculations are:
Shareholder A: 70 ÷ 100 × 100 = 70%
Shareholder B: 30 ÷ 100 × 100 = 30%
Together, their percentages equal 100%.
A company has issued 1,000 ordinary shares:
Their ownership percentages are:
Shareholder A: 500 ÷ 1,000 × 100 = 50%
Shareholder B: 350 ÷ 1,000 × 100 = 35%
Shareholder C: 150 ÷ 1,000 × 100 = 15%
The total is 100%.
Issued shares are shares that the company has allotted to shareholders.
Do not use the number of shares the company might issue in the future. Authorised share capital is generally an historic concept for modern UK companies and does not determine current ownership.
The denominator should normally reflect the company’s current issued shares after considering:
A share transfer changes who owns the shares but does not normally change the total number issued.
Yes. Multiple share classes can make ownership calculations more complicated.
You may need to calculate several separate percentages:
A person could own 60% of the total shares but have less than 60% of the voting rights if some of their shares are non-voting.
A company has issued:
Shareholder A owns all 40 A shares. Shareholder B owns all 60 B shares.
Based on the total number of shares:
However, if the B shares carry no general voting rights:
This is why ownership and voting control should not automatically be treated as the same thing.
To calculate voting power, divide the votes controlled by the shareholder by the total voting rights that can be exercised.
The formula is:
Shareholder’s voting rights ÷ total voting rights × 100 = voting percentage
For example, a shareholder controls 75 votes out of 100:
75 ÷ 100 × 100 = 75%
The shareholder controls 75% of the voting rights.
If a class carries multiple votes per share, calculate the votes rather than simply counting the shares.
To calculate a shareholder’s percentage of a particular class, divide their shares in that class by the total issued shares of the same class.
For example, a company has issued 200 A ordinary shares. A shareholder owns 50 of them:
50 ÷ 200 × 100 = 25%
The shareholder owns 25% of the A ordinary share class.
They may have a different percentage of the company’s total issued shares if other classes also exist.
Paying a dividend does not change the number of shares or ownership percentages.
If all shareholders hold identical shares, dividends will normally be distributed in proportion to their holdings.
For example, a shareholder owning 30 out of 100 identical shares will normally receive 30% of a dividend declared on that class.
Different share classes can carry different dividend rights, so a shareholder’s percentage of total shares may not equal their percentage of a particular dividend.
Issuing additional shares increases the total number of shares and can dilute existing shareholders.
For example, a company has 100 shares:
The company then issues 25 shares to a new investor. There are now 125 issued shares.
The new percentages are:
Shareholder A: 60 ÷ 125 × 100 = 48%
Shareholder B: 40 ÷ 125 × 100 = 32%
New investor: 25 ÷ 125 × 100 = 20%
The existing shareholders still own the same number of shares, but their percentages have fallen.
A share transfer changes ownership between shareholders but does not normally increase the total number of issued shares.
For example, a company has 100 shares. Shareholder A owns all 100 and transfers 20 to Shareholder B.
After the transfer:
The company still has 100 issued shares.
Not if all relevant shares are subdivided proportionally.
For example, a company changes each £1 share into 100 shares of £0.01.
A shareholder with 60 out of 100 shares would then hold 6,000 out of 10,000 shares. Their ownership remains 60%.
The number and nominal value of shares change, but the ownership percentage stays the same.
A proportional consolidation should not change ownership percentages.
For example, every 10 shares may be consolidated into one new share. A shareholder with 500 out of 1,000 shares would then own 50 out of 100 shares.
Their ownership remains 50%.
Fractional entitlements may require special treatment.
A fully diluted calculation estimates ownership as if outstanding rights to obtain shares had been exercised or converted.
It may include:
The formula is:
Shareholder’s current or potential shares ÷ total fully diluted shares × 100
Fully diluted ownership is commonly used in investment discussions because it shows how future conversions or option exercises could affect existing shareholders.
A company currently has 1,000 issued shares. A founder owns 600.
Based only on issued shares:
600 ÷ 1,000 × 100 = 60%
The company also has options over 200 new shares.
On a fully diluted basis, the total would be 1,200 shares:
600 ÷ 1,200 × 100 = 50%
The founder owns 60% of the currently issued shares but 50% on a fully diluted basis.
Control depends on voting rights rather than ownership percentage alone.
Common thresholds include:
The company’s articles, class rights and shareholders’ agreement may create additional approval requirements.
Review the company’s:
Companies House records can provide useful information, but they may not always reflect a very recent private transfer. The company’s register of members is the primary legal record of membership.
Ownership percentages may need to be rounded when the calculation produces a decimal.
For example:
1 share ÷ 3 total shares × 100 = 33.3333%
Each of three shareholders may be described as owning approximately 33.33%, but the exact fraction is one-third.
Avoid rounding in a way that changes voting or economic rights. Legal documents should use the exact number of shares rather than relying only on rounded percentages.
Common mistakes include:
Divide the shareholder’s shares by the total issued shares and multiply by 100.
No. One share equals 1% only where the company has issued 100 shares of the relevant type and rights.
Yes. Different classes may carry different voting rights.
No. Shares that have not been issued do not normally form part of the current ownership calculation.
Not until exercised, but they may be included in a fully diluted ownership calculation.
Yes. Issuing, cancelling, buying back, subdividing, consolidating or converting shares can affect the calculation.
Calculate a shareholder’s ownership percentage by dividing the number of shares they own by the company’s total issued shares and multiplying by 100.
This calculation is straightforward where all shares carry identical rights. If the company has multiple classes, calculate share ownership, voting power, dividend rights and capital rights separately.
Always use the company’s current share records and exact share numbers when determining ownership.
This article provides general information and does not constitute legal, tax or financial advice
