Mylan's stock has plunged more than 26 percent since August. An earlier version misstated the percentage and month.
An earlier version of this story incorrectly said the stock had split twice instead of once. Stock purchase prices have been changed to reflect the revision.
This story has been revised to correct that American Airlines is headquartered in Fort Worth, Texas.
Sen. Sheldon Whitehouse questioned Pruitt about energy company contributions. An earlier version misidentified the senator.
This story has been updated to show that the CPI increased 2.1 percent in the 12 months through December, not October.
This story was revised to correct the spellings of Immunotherapeutics and Biomet.
An earlier version of this story misstated Palmer's title at Oculus.
This headline was updated to show that Kevin O'Leary will run against other candidates in Canada for leadership of the Conservative party. That was not made clear in an earlier headline.
This story was revised to correct that Blackstone has $361 billion in assets under management.
This story has been revised to correct the spelling of Francisco.