The Société des Bains de Mer (SBM; English: Society of Sea Baths), officially the Société Anonyme des Bains de Mer et du Cercle des Etrangers à Monaco[1] (French: [sɔsjete de bɛ̃ d(ə) mɛʁ e dy sɛʁkl(ə) dez‿etʁɑ̃ʒez‿a mɔnako]; English: Society of Sea Baths and of the Circle of Foreigners in Monaco), is a publicly traded company registered in the Principality of Monaco.

He ceded the company to the businessman François Blanc for 1.7 million gold francs for the privilege of exploiting the monopoly on gambling in the Principality of Monaco for 50 years.

For assistance, he approached Basil Zaharoff, an international financier and arms dealer who had long been a patron of the Côte d’Azur.

[9] In 1953, Greek shipping magnate Aristotle Onassis bought up the shares of SBM via the use of front companies in the tax haven of Panama and took control of the organisation, moving his headquarters into the Old Sporting Club on Monaco's Avenue d'Ostende shortly after.

[13] Monaco had become less attractive as a tax haven in the wake of France's actions, and Rainier urged Onassis to invest in the construction of hotels.

In 2013, SBM celebrated its 150th anniversary on Monaco's place du Casino : a high end picnic imagined by world known Monégasque chef Alain Ducasse.