Understanding Uncontrolled Corporate Takeovers: What Is a Hostile Takeover?

A hostile takeover is an acquisition process that succeeds against the wishes of the company’s management. Unlike friendly takeovers, where all parties cooperate constructively, a hostile takeover often involves a tough battle between the attacker and the target company. The key difference is that this type of acquisition occurs without the approval of the board of directors.

Such takeover attempts typically arise from clear economic motives. The buyer wants to eliminate a competitor, increase their market share, or profit from an undervalued company. They often believe that after restructuring, they can achieve significant cost savings and increase the company’s operational value. These calculations are enough to justify the risks and costs of such an acquisition.

The Mechanisms: How does a hostile takeover work?

There are several established tactics that buyers use to try to take control of a company against management’s will. Each method has its own advantages and disadvantages and is chosen depending on the situation and objectives.

The most common method is the tender offer. In this case, the buyer bypasses the board entirely and goes directly to the shareholders. They offer to buy their shares at a price significantly above the current market value. If enough shareholders accept this offer, the buyer can gain control of the company without involving the board.

A second method is the gradual stock purchase on the open market (creeping takeover). Here, the potential acquirer discreetly buys shares in small portions on the stock exchange. This initially happens unobtrusively until a sufficiently large stake is built. Only then does the buyer reveal themselves publicly and attempt to pressure management.

The third method is called a proxy fight. In this approach, the buyer bypasses both management and existing shareholder structures. Instead, they negotiate directly with the supervisory board and influence votes at the general meeting. The goal is to oust the current management and replace them with managers who are favorable to the planned takeover.

Defense strategies against takeover attempts

When a board receives a takeover attempt and rejects it, they have a wide arsenal of countermeasures. One of the most well-known strategies is the so-called “poison pill.” This involves measures that make a purchase either impossible or so costly that the attacker gives up. An example would be issuing large amounts of new shares, diluting the current owners.

Another approach is selling off the most valuable assets. If management spins off and sells profitable core assets, the target becomes less attractive to the buyer. This is sometimes called “self-amputation” to save the board.

Simultaneously, the affected company typically looks for a “white knight.” This is another company willing to step in under conditions acceptable to management. This “friendly” bidder creates alternatives and puts pressure on the original aggressor.

Additionally, the board may reach out to larger shareholder groups to mobilize them against the takeover. An intensive media campaign with convincing arguments against the deal is also a standard tactic of defense.

A real-world example from the banking sector

In fall 2024, the takeover attempt by the Italian major bank UniCredit against the German Commerzbank exemplified how such confrontations unfold in practice. UniCredit began buying shares on the open market and later announced a formal takeover bid. The Commerzbank management rejected this attempt and tried to defend against the “aggression.”

This case illustrates both the mechanisms of a hostile takeover and the defense options available to the attacked company. The broad distribution of Commerzbank shares means no single shareholder has a decisive vote, making the process longer and more complex.

Ultimately, such events demonstrate that modern capitalism is not only about friendly cooperation. Takeover attempts remain an important mechanism of market consolidation—sometimes with the target company’s consent, sometimes against it.