An indirect non-controlling interest, on the other hand, is when you own a non-controlling interest in a company via another company. It's indirect because you didn't choose or make the investment. The investment isn't registered to you in any way, but you're still an investor in it.
How does this happen? Generally, it's due to an acquisition of another company by one that you already own. For example, you have owned XYZ, Inc. for four years, and the company has recently acquired ABC, Inc. You still own XYZ, Inc., but it now owns ABC, Inc. -- and so do you, even though you don't directly own any shares of ABC, Inc.
Activist investors and non-controlling interests
Although you can hold a non-controlling interest in a company with very few shares, non-controlling interests get far more interesting when a single investor holds 5% to 10% of the shares of a company.
These people or organizations are called activist investors, and although they have no formal say in the company's management or handling, they often flex their muscles anyway. Activist investors may send proposals to the board of directors or management, or they may even suggest changes to management or company policies. When activist investors band together to support a specific measure, they may find that their voices are overwhelming, even though they technically have no control over the company on paper.
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