Differences between John F. Antioco and the company’s board over his compensation package have dragged on for nearly two years.

For a second year, General Motors says that about 20 top managers, including the chief executive, will not get cash bonuses.

These are the biggest global enterprises based on a composite of sales, market value, assets and profits.

Now each executive will earn either above-median or below-median incentive pay instead of the 75th percentile. That’s a 20 percent hit for the chief executive.

The top executives of Deutsche Bank and Credit Suisse received substantially bigger pay packages last year, but they still lagged behind their American counterparts.

The combined $21 million in stock payouts to five top executives at American Airlines is looming large in labor talks with pilots.

Robert Diamond, the president and head of investment banking, made $30 million in 2006, five times as much as John Varley, the C.E.O.

The company gave no reason for the departures nor did it say if the company had chosen successors for the directors.

Chief executive Gerald Grinstein will not receive any stock, incentive payments or severance when the company exits bankruptcy protection this spring.

The total compensation for J. Raymond Elliott, head of Zimmer Holdings, was 16.3 percent higher last year than in 2005.

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