What Is a White Knight?
A white knight is a friendly company or investor that acquires a takeover target at the target's own invitation, saving it from a hostile bidder, often labeled the black knight. The target's board concludes it cannot stay independent, so instead of fighting the raider indefinitely, it seeks a buyer it actually wants.
The white knight typically offers a higher price, commitments to retain management and employees, or a better strategic fit. It is a defense of last resort in the sense that the company still gets sold, but on terms the board negotiated rather than terms imposed by an aggressor.
How a White Knight Rescue Unfolds
Once a hostile tender offer or bear hug letter lands, the target's bankers quietly canvass potential friendly buyers while the board buys time with defenses like a poison pill. If a white knight emerges, it signs a negotiated merger agreement, often with deal protections such as a breakup fee, and the board recommends that deal over the hostile bid.
For example, if a raider offers 50 dollars per share for a company trading at 40 dollars, the board might solicit a white knight willing to pay 55 dollars in a friendly merger. The hostile bidder must then raise its offer, walk away, or attempt a proxy fight, and shareholders usually end up capturing a larger premium because of the competition.
White Knights, White Squires, and Other Chess Pieces
M&A borrows heavily from chess vocabulary here. A white squire is a friendly investor that buys a significant minority stake, large enough to block the hostile bidder from gaining control, without acquiring the whole company, while a grey knight is an opportunistic second bidder whose intentions are unclear.
A famous historical example is the 1980s battle for Gulf Oil, in which Chevron acted as white knight against a corporate raider, and in 2006 Mittal Steel's pursuit of Arcelor prompted Arcelor to court a white knight before ultimately merging with Mittal. Knowing these terms and one example is easy credibility in an IB interview when takeover defenses come up.
Trade-Offs for the Target
A white knight sale is still a sale, so the company loses its independence, and boards must be careful to satisfy their fiduciary duties. Under the Revlon doctrine from Delaware case law, once a sale becomes inevitable the board's job shifts to maximizing the price for shareholders, meaning it cannot simply hand the company to a favored buyer at a lower price.
Bankers running these situations manage a live auction under hostile pressure, produce fairness opinions on competing bids, and negotiate protections that keep the white knight committed without foreclosing higher offers.
