Rupert, Prince zu Löwenstein-Wertheim-Freudenberg, Count of Löwenstein-Scharffeneck[1] (24 August 1933 – 20 May 2014) was a Spanish-born Bavarian aristocrat and the longtime financial manager of the rock band The Rolling Stones.

Loewenstein was educated at the then Quaker St Christopher School in Letchworth, Hertfordshire, followed by Magdalen College, Oxford, where he studied medieval history.

In 1963, he was part of a consortium formed to buy the merchant bank Leopold Joseph & Sons, along with fellow Oxford graduates Jonathan Guinness, Richard Cox-Johnson and Louis Heyman,[7][8] and he became a director of the resulting firm.

[2] In 1968, then working in London as a merchant banker, he was introduced to Mick Jagger by a mutual friend, art dealer Christopher Gibbs.

[3] Loewenstein is credited with transforming the Stones into a "global brand and one of the world's richest bands", in particular by encouraging them to take into account potential tax advantages in any decisions about where to record, rehearse or perform.

[3] He managed their release from an existing contract, which paid them almost nothing, and persuaded them of the tax advantages of leaving England and moving to the south of France.

He channelled their earnings through a series of companies in the Netherlands, and got them to rehearse in Canada, rather than the United States, to reduce their tax bill.

[11] Loewenstein also copyrighted the famous red tongue logo, and enlisted corporate sponsors such as General Electric for tours.

Jagger was not pleased and was reported to have said: "Call me old-fashioned, but I don't think your ex-bank manager should be discussing your financial dealings and personal information in public.