Corporations Auxiliary Company
Corporations Auxiliary Company was an American corporation created to conduct "the administration of industrial espionage" in the United States.
Corporations Auxiliary Company masqueraded under a dozen different names. It specialized at electing its agents to union office in order to control or destroy unions; providing labor spies who could propagandize, sabotage, or act as goons in exchange for payment.
In 1921, the New York World reported that Corporations Auxiliary Company issued "a bi-weekly bulletin of labor Information gathered by undercover methods in every State in the country."
An investigation revealed that the Steel Corporation of Pennsylvania possessed worker blacklists, as well as reports from two labor detective agencies, including Corporations Auxiliary Company. In the period 1933 to 1936, Corporations Auxiliary Company had 499 corporate clients.