What it means
Most shareholders hold small stakes and have little power individually. A principal shareholder is different because their votes can decide elections of directors, approve mergers or block major changes.
Their interests may differ from those of smaller investors, so rules require transparency. The key tests are the size of the holding and sometimes the ability to control or influence decisions.
Many securities regimes require disclosure once a holder passes a threshold, and thresholds range from low single digits up to 10% depending on the jurisdiction and the purpose. Holdings through relatives, trusts or companies are often counted together.
Principal shareholders often face extra rules. They may have to report trades promptly, they can be restricted from profiting from short-term trading in the company's shares, and dealings between them and the company are scrutinised as related party transactions.
In an acquisition, their support or opposition is often decisive. For the company, a principal shareholder can be a source of stability and expertise, or a source of conflict.
A founder with a large stake can provide long-term vision, while an investor with a different agenda may press for a sale or a change of strategy. Boards therefore engage with these holders regularly and give them clear information.
For finance staff, the topic matters because annual reports and filings list principal shareholders and note transactions with them. When reading a company's accounts, check who the large holders are and whether any loans, leases or sales to them are on commercial terms.
This entry is a general guide, not legal advice. Disclosure also helps ordinary investors.
Knowing that a founder or a fund owns a large stake tells the market who has an incentive to see the company succeed, and who could sell and move the price. Sudden changes in a principal shareholder's holding are therefore watched closely.
In practice
Real-world examples.
Example
A founder retains 30% of her company after its stock market listing. She is a principal shareholder, must disclose any sales of her shares and holds a strong voice on strategy. Any sale of shares by her is reported and watched by the market.
Example
A pension fund builds a 12% stake in a manufacturer. The fund files a disclosure notice, and the company's board schedules regular meetings with it. Other investors follow the filing to understand who is building a position.
Example
A supplier of a listed company also owns 11% of its shares. The company's auditors review contracts with the supplier closely, because the principal shareholder relationship could lead to terms that are not at arm's length. The auditors compare the prices charged with those available from independent suppliers.
Formula
Calculation
Ownership percentage = Shares held / Total shares outstanding x 100.
An investor holds 6,500,000 shares in a company with 50,000,000 shares outstanding. The ownership percentage is 6,500,000 / 50,000,000 = 0.13, or 13%. If the relevant disclosure threshold is 10%, the investor must disclose the holding and is treated as a principal shareholder.
Suppose the investor's spouse holds another 1,000,000 shares that must be counted together with theirs. The combined holding is 6,500,000 + 1,000,000 = 7,500,000 shares, which is 7,500,000 / 50,000,000 = 15%.Case study
Seen in the real world.
Redstone Brewing is a fictional listed company in which an investment group quietly built a stake of 9%, then 14% over a year. As the holding passed the disclosure threshold in this illustrative case, the group filed a notice and became a principal shareholder.
The board met the group and learned that it wanted the company to sell its distribution division. Other shareholders worried that a large holder could push through a change that favoured short-term gains.
The fictional board commissioned an independent review of the division's value and put the question to a shareholder vote. The outcome showed that large holders influence the debate but still need the support of the wider shareholder base. The vote was close, and the wider base of smaller holders proved to be decisive.
Watch out
Common mistakes.
- Assuming a principal shareholder must own more than 50%, when influential stakes are often much smaller.
- Forgetting to count holdings of family members, trusts or companies, which regulations often add together. Check how the relevant rules define connected persons.
- Overlooking transactions between the company and its principal shareholders, which need careful review for fairness.
Questions
People also ask.
What percentage makes someone a principal shareholder?
It depends on the rules in question, with 10% being a common threshold, but others are lower or higher.
Do principal shareholders have to disclose their holdings?
In most regimes they do, and they may also have to report changes and certain trades. Failing to disclose on time can lead to fines or restrictions on voting the shares.
Can a principal shareholder control the company?
Not necessarily, but a large holding gives significant influence, especially when other shares are widely spread.
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