TXU Corp. , renamed Energy Future Holdings, was bought for $43.3 billion by KKR and TPG in 2007. The private equity buyers valued the Texas-based utility company at $43.3 billion when counting the debt that came with it and paid $69.25 a share, 15% above the stock at the time the deal was announced. Because Texas's biggest electricity company was being sold to private investors after years as a public utility, buyers at the time said they would likely hold their investment for at least 5 years. KKR and TPG added $24.5 billion in new debt to finance the buyout.

After the recession hit, markets froze and energy prices fell. In 2008, the company had a pretax loss of almost $10.5 billion and paid almost $5 billion in interest on its debt stock of roughly $40 billion. The company has not yet registered an initial public offering filing.

If you liked this article you might like

Some of Trump's NFL Owner Friends Side With Players in Dispute With President

Google or Amazon Should Acquire Toys "R" Us -- Bankruptcy Lawyer Says

Toys 'R' Us Store Employees Set for Higher Wages Despite Bankruptcy

Pret A Manger Takeover in the Works; Cisco's M&A Shackles Come Off - ICYMI

Toys 'R' Us Debt Load Tips It Into Chapter 11