The bank claimed PwC gave it flawed advice when it was considering buying the United Bank of America in 1987.
Standard sued and was awarded record damages of $341 million, but the ruling was overturned.
Many of the charges against PwC were thrown out but Standard was allowed to put in a claim of negligent misrepresentation. The bank again sought to rake in $341 million plus interest.
The sum paid out by PwC in settlement has not been disclosed