"Rupert was a merchant banker, very pukka, trustworthy," Keith Richards said in his autobiography "Life" - and he proved invaluable to the band.
Rolling Stones moneyman Rupert Loewenstein dies →
"He is a great financial mind for the market," Richards told Fortune magazine in 2002. "He plays that like I play guitar. ... As long as there's a smile on Rupert's face, I'm cool."