Regulators are actively pursuing companies to learn what they are doing to control insider trading.

FORBES: Monitoring Traders Trade: Sell-Side, Buy-Side or Asset Managers

It suggested that a company like Ford, with 40% insider control, generates a 15% lower return than a similar company without dual shares.

FORBES: Henry Ford's Will

States do not have to acquire majority interest (control of 50% or more of the voting stock) or even insider ownership (control of 5% or more of the voting stock) to wield an influential hand in furthering their interest.

CENTERFORSECURITYPOLICY: The danger of sovereign wealth funds

As a self-made entrepreneur in a country where business often requires buying favors, many people sympathize with his efforts to reassert control over his empire while serving a 14-year sentence for bribery and insider trading.

FORBES: Gome's Jailed Tycoon Suffers Setback