Elon Musk isn't the first to walk away from a deal. Here's how similar cases have ended.

Corrections & Clarifications: An earlier version of this story misstated the year Judge Leo Strine required the completion of Tyson's stalled deal. The year was 2001.

Elon Musk isn’t the first executive to have buyer’s remorse.

The Tesla and SpaceX CEO told Twitter this month that he was backing out of a $44 billion takeover. Twitter, in turn, filed a lawsuit against Musk.

Though the personalities and money attached make the deal one of a kind, there have been other takeover agreements in which one party tries to walk away. Many of the lawsuits that stem from these disputes wind up in the Delaware Court of Chancery, a nonjury court that has become a premier battleground for business disputes because of the state's business-friendly incorporation laws.

Many of these cases don't reach judgment because it’s more likely for the parties to settle out of court. For those that do, experts say, the rulings rely heavily on the initial contracts, many of which are seller-friendly.

“The Delaware courts very rarely grant breakups,” said Thomas Lys, an accounting professor and professor of law by courtesy at Northwestern University. "You sign a deal, you live by the deal. You can get out of it under extraordinary circumstances, but typically it's difficult."

Twitter accepted a $44 billion bid from Tesla billionaire Elon Musk, who says he wants to abolish permanent bans on the social media platform.
Twitter accepted a $44 billion bid from Tesla billionaire Elon Musk, who says he wants to abolish permanent bans on the social media platform.

Previous cases show there are a number of outcomes possible with Twitter's lawsuit.

Those include the judge ordering Musk to close the deal, or Musk walking away by paying a $1 billion breakup fee. Twitter and Musk also could renegotiate the purchase price or breakup fee and settle out of court.

Here’s how other M&A cases have been settled in the Delaware court:

Twitter sues Musk: Twitter sues Elon Musk for backing out of $44 billion deal to buy company

Tyson v. IBP

Tyson Foods agreed to purchase meat distributor IBP for $3.2 billion in January 2001. But a harsh winter led to poor performance from IBP, and Tyson soon began to have second thoughts.

Tyson announced that it planned to terminate the deal. The company claimed IBP failed to disclose crucial information and argued that declining performance was evidence of a “material adverse effect” – a circumstance laid out in a contract that would allow the buyer to walk away from the deal without penalty.

But a judge at the Delaware Court of Chancery did not consider a “short-term hiccup in earnings” to be a material adverse effect. In June 2001, Judge Leo Strine – who now works for the firm representing Twitter – ordered Tyson to close the deal.

In 2001, Tyson Foods in Springdale, Ark., sought to terminate its agreement to purchase meat distributor IBP for $3.2 billion.
In 2001, Tyson Foods in Springdale, Ark., sought to terminate its agreement to purchase meat distributor IBP for $3.2 billion.

The case “really sets this very high threshold that’s necessary to prove an MAE,” or material adverse effect, said Steven Haas, co-head of law firm Hunton Andrews Kurth LLP’s M&A practice.