The story
Ernst Thalmann, an American banker, and Adolph Ladenburg, the son of German banker Emil Ladenburg, founded Ladenburg Thalmann in 1876. In 1879, Ernst Thalmann paid $13,550 (equivalent to $468,000 in 2025) for a seat on the New York Stock Exchange.
Ladenburg Thalmann became one of the most influential private merchant banking firms, a major financial intermediary between America, Great Britain, and the European Continent. It played an important role in financing the growth of American industry—particularly America's railroads, utilities, and emerging industries—through the early twentieth century and was among the few investment banks to prosper during the Great Depression. It has financed the merger of Ferrocarril Central Mexicano (Mexican Central Railway) of Mexico, the electrification of Companhia Paulista de Estradas de Ferro in Brazil, led the syndicate for Port Authority of New York and New Jersey bonds and was the bank Albert Einstein chose to invest 75% of his Nobel Prize money.
In the early part of the 20th century, many notable businessmen joined Ladenburg Thalmann as partners, including Gerson von Bleichröder and Benjamin Seymour Guinness and Walter Tower Rosen.
World War II
Ladenburg Thalmann provided banking services for the Allies' covert warfare activities throughout World War II. SOE in London was tasked by HM Treasury in July 1942 as the lead British agency for the acquisition of foreign currency, required in small denominations by members of the plethora of British covert wartime agencies, as well as the escape packs of Allied aircrew. SOE turned to British Security Coordination (BSC) for help with this task; the very close links between BSC and the OSS meant that there was continual collaboration between the two agencies in support of this task. Some of the currencies acquired were seized from ships being searched in the Contraband Control Bases, such as Bermuda, Gibraltar, and Aden, or legitimately bought from legitimate passengers on those ships. Another source was the black markets in Tangiers, Beirut, Istanbul, and elsewhere, from the sale of commodities such as gold, platinum, diamonds, precious stones, and Swiss watches. Most of these items, in short supply because of the Allied blockade and restrictions on movement, could be purchasing using sterling by British government supply departments within the British Empire.
Virtually every European currency was acquired, as well as South American and Far Eastern currencies; a statement from mid-1944 prepared for Winston Churchill cited the cumulative acquisitions to that date as being 600m French francs, 20m Belgian francs, 8m Dutch guilders, 3.5m Norwegian kroner, 3.5m Danish kroner, 6m Reichsmarks, 8m Spanish pesetas, 16m U.S. dollars, and 0.5m Argentine pesos. Excluding the U.S. dollars and Argentine pesos, the balance had cost the British Treasury around £2m. A major problem that both SOE and BSC had to contend with was the sheer weight and volume of small denomination bank notes; a number of surviving signals in SOE files at National Archives in Kew mention "tons" of bank notes.
There is no doubt that contraband seizures by Allied blockade authorities were 'recycled' to support wartime covert activity. Musson's Smuggling Fleet, which operated from Gibraltar carrying SOE and SIS agents to and from Spanish soil, covered its tracks with a smuggling operation based initially on selling tobacco seized from blockade-running merchant ships. Tobacco was deemed a more useful bribe to badly-paid Spanish border and customs officials, and hundreds of tons were shipped in from Latin America, and North Africa post-TORCH, blended and packaged in Gibraltar, and handed to Musson's operation to maintain the smuggling cover.
From Wikipedia’s article on Ladenburg Thalmann, shared under CC BY-SA 4.0.4