Some companies that are about to report earnings could see a slide in their share prices. With the busiest week of earnings season underway, investors are certainly in for a hectic time. Nearly a third of the companies in the S & P 500 are scheduled to report their earnings this week. CNBC Pro screened the S & P 500 for companies that could see their stocks tumble after earnings. Industrial technology company Rockwell Automation has had its earnings revised downward 29 times in the past three months.

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Persons: Myers Squibb, Steve Chesney Organizations: CNBC Pro, Myers, Bristol, Myers Squibb, Rockwell Automation, Gilead Sciences Locations: Bristol, Biopharmaceutical, Gilead