In 1856, Havas and Reuters signed an agreement to join efforts and exchange information about their respective domestic financial markets, passing on the results of trading sessions in their capitals to each other. Shortly thereafter, Wolff was invited to join the initiative, using data from the Berlin stock exchange. Three years later, the partnership was formalized with a cooperation agreement signed by the three companies, nicknamed "Grande Alliance" or Ring. On that occasion, Bernhard Wolff and Paul Julius Reuter were received in Paris by Charles-Guillaume and Auguste Havas (sons of Charles Havas and owners of the French agency since his death in 1858) on July 15, 1859.
