Several states require regulatory approval of purchases of more than 10 percent of an insurance company's shares outstanding.

The Government banned the purchase of more than 15 percent of the company's stock by a single buyer until the end of next year.

The Federal Trade Commission said today that it would consider easing rules covering purchases of 10 percent or less of a company's stock.

Analysts are skeptical of some of his biggest foreign deals, like the purchase of 20 percent of Fiat.

Dow Jones has already invested nearly $1 billion in Telerate, beginning in 1985 with its purchase of 32 percent of the stock.

This coordinated strategy was used to avoid violating Britain's Companies Act, which requires any purchase of more than 5 percent in a company to be declared.

The plan sets a target for the public purchase of 75 percent of this land at an estimated cost of about $75 million.

The Federal Reserve's approval is required for any purchase of 10 percent or more of the stock of an American banking company.

One of its large investments last year was the purchase of 5 percent of its stock.

It also raised questions about the purchase of 9.5 percent of Gucci last summer by Prada, the Italian fashion house.