The article discusses how big shareholders in companies can sometimes act in their own interests instead of focusing on making profits for all shareholders. This can create conflicts within the company. The researchers looked at data from Finland to see how this plays out in real life. They found that when a few big shareholders control a company, they may not always make decisions that benefit everyone. This can lead to problems for smaller shareholders. The type of big shareholder, like a family or a financial institution, can also affect how the company is run.