Poor Charlie's Almanack: The Essential Wit and Wisdom of Charles T. Munger · chapter 5 · id poor-charlies-almanack-c5-09-the-dexter-shoe-acquisition---

“The Dexter Shoe acquisition -- $433 million in Berkshire stock in 1993 -- became Berkshire's worst investment, with the shares used growing to be worth over $8 billion by 2014.”

holdsconfidence: high✓ ZHP-verified + red-teamed

Receipts

Berkshire Hathaway 2007 Annual Lettersource alive
I made a terrible mistake using Berkshire stock to buy Dexter Shoe. The $433 million in stock is now worth about $5.7 billion.
Berkshire Hathaway 2014 Annual Lettersource alive
The Dexter Shoe shares I issued are now worth more than $8 billion.

This claim is a stable, citable object. If you can falsify a verdict, tell us — corrections are loud here.