The Securities and Exchange Commission had accused the billionaire investor of not disclosing that he had pledged personal stock holdings as collateral for billions of dollars in loans. Securities and Commodities Violations, Stocks and Bonds, Shareholder Rights and Activism, Fines (Penalties), Icahn Enterprises L P, Securities and Exchange Commission, Icahn, Carl C The Securities and Exchange Commission had accused the billionaire investor of not disclosing that he had pledged personal stock holdings as collateral for billions of dollars in loans. NYT > Business