How a Single Investor Can Force a Giant Company to Change
Activist investors buy a stake in a company they think is underperforming and then pressure it publicly to change. In 2025 they launched a record number of campaigns and forced out 32 CEOs. Here is how a single investor can bend a giant company to its will.
A Small Stake and a Loud Voice
An activist investor buys a meaningful but usually minority stake in a public company, often just a few percent, and then uses that position to demand change. The change might be cutting costs, returning cash to shareholders, replacing the chief executive, breaking the company up, or selling it outright. What makes activists remarkable is how much leverage they wield with so little ownership. They do not control the company, yet they routinely force boards and management to do what they want, and in 2025 they did it more than ever, launching a record number of campaigns.
How a Few Percent Becomes Real Power
The power comes not from the stake itself but from the votes the activist can rally behind it. Most shares of a big public company are held by large institutions, the index funds, pension funds, and asset managers, who pay limited attention to any single company they own. An activist does the homework, builds a detailed public argument that the company is mismanaged or undervalued, and then campaigns to win those institutions over to its side. If enough of them agree, the activist can secure seats on the board or force a vote, and the mere threat of that fight is often enough to make management come to the table.
This is the heart of it. An activist with 3 percent of the shares and a convincing case can effectively borrow the votes of the other 97 percent. The campaign is really a battle for the support of the big, quiet institutions that actually own most of the company.
The 2025 Record
2025 was one of the busiest years for activism on record. Investors launched roughly 255 campaigns against companies worldwide, nearly 20 percent above the long-term average. More than half of those campaigns targeted board seats, up sharply from the historical norm, and activists won close to 100 board seats over the year, most of them through negotiated settlements rather than open proxy fights. Most striking of all, 32 chief executives resigned within a year of being targeted, the highest number ever recorded and a 60 percent jump over the prior average. The message to boards was unmistakable. An activist campaign is now one of the most serious threats a management team can face.
What Activists Push For
The demands tend to fall into a few buckets. Some are financial, pressing the company to return more cash through buybacks or dividends, or to adopt a more efficient capital structure. Some are operational, demanding cost cuts or a sharper focus. Some are structural, pushing for a breakup or a sale, which is why activism and the recent wave of spinoffs are so closely linked. And many are about governance and people, seeking board seats and, increasingly often, the removal of the chief executive. The common thread is a belief that the company is worth more than the market gives it credit for, and that specific changes will close the gap.
The Case For and Against
Supporters argue that activists are a healthy check on complacent management, forcing boards to justify their strategy and to treat shareholders' capital with respect. Plenty of campaigns have genuinely improved the companies they targeted. Critics counter that some activists chase short-term gains, pushing for buybacks and cost cuts that flatter the stock for a year while starving the business of long-term investment. Both are true, depending on the activist and the situation. The best campaigns sharpen a business. The worst strip it for parts.
Why Boards Settle
One of the quieter lessons of recent years is how often boards now settle rather than fight. The vast majority of board seats activists won in 2025 came through negotiated agreements, not bruising public votes. A proxy fight is expensive, distracting, and unpredictable, and a public airing of a company's weaknesses is damaging in itself. Faced with a credible activist and a persuasive case, many boards conclude that giving up a seat or two is cheaper than the war. That calculation is exactly why a small investor can move a very large company.
Why It Matters for the Role
Activism sits right at the intersection of strategy, valuation, and governance. The work an activist does, building a sum-of-the-parts case, identifying the specific changes that would unlock value, and quantifying the upside, is the same analytical work that underpins serious corporate finance. Understanding how and why companies get pushed to change is part of understanding how the whole system holds management accountable.