The Mills v. Electric Auto-Lite Co. case in 1969 revolved around a merger between the Electric Auto-Lite Company and Mergenthaler Linotype Company, which was challenged by shareholders who alleged that proxy materials provided were misleading and incomplete, thus violating the Securities Exchange Act of 1934. The Supreme Court ruled in favor of the shareholders, stating that they had been denied "the full and fair corporate suffrage" guaranteed under federal law due to inadequate disclosure about financial advisors' interests in the transaction. This landmark decision underscored the importance of transparency for shareholder votes on mergers or other significant changes within a corporation.

The dissenting opinion in the Mills v. Electric Auto-Lite Co. case argued that the majority's decision to allow shareholders to sue for misleading proxy statements, even if they did not rely on those statements when voting, was a misinterpretation of Section 14(a) of the Securities Exchange Act and its related Rule 14a-9. The dissenters believed that this interpretation expanded liability too broadly and could potentially deter corporate officials from making any forward-looking projections or estimates out of fear of litigation. They also expressed concern about imposing such severe penalties without clear legislative intent or evidence that Congress intended such an expansive reading of these laws. Furthermore, they questioned whether it was appropriate for courts to intervene in internal corporate affairs based on allegations which may be trivial or insignificant but technically violate federal securities law.