As smartphone screens grow larger and laptop computers grow thinner and lighter, sales of the iPad are declining and growth slowing for rival Android tablets.
Caterpillar said its profit rose 4.1% as the machinery maker benefited from lower operating costs and strong construction results, while its mining-related business continued to post weak results.
Southwest Airlines Co. said its second-quarter earnings more than doubled as the carrier reported higher passenger revenue and lower fuel costs.
Meal-delivery startups such as Plated and Blue Apron, along with their investors are hoping to avoid the fate of dot.com era food industry failures.
Boston Scientific Corp. said second-quarter earnings fell as higher costs, including a $267 million litigation-related expense, masked an increase in revenue.
GM reported an 80% drop its second-quarter net profit, with earnings hit by $1.5 billion in charges related to vehicle recalls and money set aside to fund a compensation plan for victims of accidents linked to defective ignition-switches.
Supervalu said its fiscal first-quarter earnings fell 49% as the supermarket operator was hit by weaker margins and a modest sales decline, while the year-earlier period included a tax benefit.
United Continental Holdings said its second-quarter profit surged 68% as passenger revenue climbed.
Scholastic Corp. said its fiscal fourth-quarter profit rose 31% as revenue increased in four of the company's five operating segments.
Indian software exporter Wipro said net profit rose 30% in the first quarter, helped by a revival in orders from the U.S. and Europe.