In the case of Alleghany Corporation v. Breswick & Co., the U.S. Supreme Court ruled in favor of Breswick & Co., upholding a lower court's decision that certain transactions by Alleghany Corporation violated the Investment Company Act of 1940 and were therefore illegal. The dispute centered around whether or not Alleghany, which had acquired control over two railroad companies, was an investment company under federal law and thus subject to specific regulations regarding its business practices. The Court found that it was indeed an investment company because it engaged in activities such as buying, holding, selling and trading securities for its own account rather than operating railroads directly itself.

In the dissenting opinion for Alleghany Corporation v. Breswick & Co., Justice Frankfurter, joined by Justices Burton and Harlan, argued that the majority had overstepped its bounds in interpreting the Interstate Commerce Act to include transactions not directly related to transportation. They contended that this interpretation was a significant departure from previous understandings of the Act's scope and could potentially have far-reaching implications beyond those intended by Congress when it enacted the legislation. The dissenters also disagreed with how broadly the majority interpreted "control" under Section 5(2) of this act, arguing that such an expansive view would lead to unnecessary regulatory burdens on businesses engaged in non-transportation activities. Furthermore, they expressed concern about judicial interference with administrative agencies' discretion in applying statutory provisions within their purview.