In her letter, Warren pressed her call for the SEC to develop a political spending disclosure rule, something she said White has refused to do.
Such a rule would force companies to disclose their political contributions, thus increasing transparency for investors.
"Chair White's refusal to move forward on a political spending disclosure rule serves the narrow interests of powerful executives who would prefer to hide their expenditures of company money to advance their own personal ideologies," Warren said.
The Supreme Court's Citizens United decision in 2010 allowed for unlimited political spending by corporations, but Justice Anthony Kennedy expressed his strong support for public disclosure of the money spent.
"Prompt disclosure of expenditures can provide shareholders and citizens with the information needed to hold corporations and elected officials accountable for their positions and supporters," he wrote.