Hale v. Henkel – 201 U.S. 43 (1906), Page 201 U. S. 74,

“If, whenever an officer or employee of a corporation were summoned before a grand jury as a witness, he could refuse to produce the books and documents of such corporation upon the ground that they would incriminate the corporation itself, it would result in the failure of a large number of cases where the illegal combination was determinable only upon the examination of such papers. Conceding that the witness was an officer of the corporation under investigation, and that he was entitled to assert the rights of corporation with respect to the production of its books and papers, we are of the opinion that there is a clear distinction in this particular between an individual and a corporation, and that the latter has no right to refuse to submit its books and papers for an examination at the suit of the State. The individual may stand upon his constitutional rights as a citizen. He is entitled to carry on his private business in his own way. His power to contract is unlimited. He owes no duty to the State or to his neighbors to divulge his business, or to open his doors to an investigation, so far as it may tend to criminate him. He owes no such duty to the State, since he receives nothing therefrom beyond the protection of his life and property. His rights are such as existed by the law of the land long antecedent to the organization of the State, and can only be taken from him by due process of law, and in accordance with the Constitution. Among his rights are a refusal to incriminate himself and the immunity of himself and his property from arrest or seizure except under a warrant of the law. He owes nothing to the public so long as he does not trespass upon their rights.

Upon the other hand, the corporation is a creature of the State. It is presumed to be incorporated for the benefit of the public. It receives certain special privileges and franchises, and holds them subject to the laws of the State and the limitations of its charter.”

http://supreme.justia.com/cases/federal/us/201/43/case.html