Check out which companies are making headlines after the bell Monday:
Alcoa - The aluminum producer posted earnings of 7 cents a share on sales of $5.85 billion, edging past estimates for 6 cents a share on revenue of $5.83 billion. Shares rose in extended-hours trading.
(Read More: Stocks Post 3-Day Win Streak; INTC Falls 3%)
Intuitive Surgical - The medical-equipment maker said it expects to post second-quarter revenue of $575 million, falling short of current Wall Street expectations for $630 million. The company is expected to post full results on July 18. Shares tumbled sharply in extended-hours trading.
"While we are disappointed in our performance this quarter, particularly with respect to our capital sales in the U.S., overall procedure performance was solid in a difficult environment, we remain confident in the value that our products and services bring to patients, hospitals and the healthcare system," said CEO Gary Guthart, in the company's press release.