Check out which companies are making headlines before the bell:
Procter & Gamble — The consumer products giant reported adjusted quarterly profit of 79 cents per share, five cents a share above estimates. Revenue also beat analysts' projections. P&G did say that current-quarter earnings would be disproportionately affected by currency fluctuations.
Pfizer — The drugmaker came in two cents a share above estimates, with quarterly profit of 64 cents per share. Revenue was also above estimates. The company's results were helped by sales of its newer products as well as its 2015 acquisition of Hospira.
Aetna — The insurer reported adjusted quarterly profit of $2.21 per share, beating estimates by nine cents a share. Revenue was also above Street forecasts. Aetna announced it would withdraw all of its 2017 public exchange expansion plans, citing significant structural challenges. Separately, Aetna and potential merger partner Humana announced the sale of some Medicare Advantage assets to Molina Healthcare. That would be contingent on completion of Aetna's purchase of Humana, which the Justice Department is currently opposing.
CVS Health — The drugstore operator and pharmacy benefits manager reported adjusted quarterly profit of $1.32 per share, two cents a share above estimates. Revenue missed analysts' forecasts. The company lowered its 2016 guidance, but did give a current-quarter forecast slightly above analysts' estimates.
Cardinal Health — The integrated health care products company earned $1.14 per share for its fiscal fourth quarter, beating estimates by a penny a share. The company also beat on the top line.
Home Depot — Stifel initiated coverage on the home improvement retailer with a "buy" rating, based in part on a bullish backdrop for home improvement spending.
Generac — The maker of home generators came in four cents a share above estimates, with adjusted quarterly profit of 64 cents per share. Revenue also exceeded forecasts. The results were driven by a strong increase in residential sales.
Mallinckrodt — The drugmaker earned an adjusted $2.20 per share for the second quarter, 19 cents a share above estimates. Revenue and the company's full-year forecast also exceeded expectations. Mallnckrodt's results are being helped by strong growth in its specialty brands segment.
AmerisourceBergen — The drug distributor earned an adjusted $1.37 per share for its fiscal third quarter, ten cents a share above estimates. Revenue and the company's full-year forecast are also above consensus. The company said its results have been helped by strong growth in its specialty segment, as well as recent acquisitions.
Honda Motor — The automaker reported stronger-than-expected first-quarter operating profit. An increase in sales helped offset the negative effects of currency fluctuations.
Volkswagen — Volkswagen is seeking dismissal of a class action lawsuit in California. The suit claims that the automaker's former CEO Martin Winterkorn and current brand chief Herbert Diess were directly involved in misleading statements regarding Volkswagen's diesel emissions scandal, but the company says no proof has been provided.
Emerson Electric — Emerson sold its motors and drives unit to Japan's Nidec Corp. for $1.2 billion, and announced an agreement to sell its Network Power unit to a group of investors for $4 billion.
Coach — Coach struck a 20-year sale and leaseback deal for its New York City headquarters, a transaction which will result in a gain of about $30 million.
Bank of America — Bank of America said its results could be adversely if Britain's exit from the European Union limits the ability of its U.K. units to conduct business in Europe.
McDonald's — The restaurant chain will use sugar instead of corn syrup in its hamburger buns, and has eliminated artificial preservatives from its Chicken McNuggets and a handful of items on its breakfast menu.
Texas Roadhouse — The restaurant operator reported a 3.7 percent increase in same-restaurant sales for the first four weeks of its third quarter, a slower rate than the second quarter's 4.5 percent pace.
Boeing — Boeing won a $640 million Pentagon contract to supply spare parts for the F/A-18 aircraft.
Williams Cos — Williams reported a quarterly loss and announced a 69 percent dividend cut, to 20 cents per share from 64 cents a share. The natural gas pipeline company wants to put more cash into affiliate Williams Partners.
Cognex — Cognex reported better-than-expected second-quarter earnings, and the maker of barcode scanners also predicted current-quarter revenue that exceeds analysts' forecasts. Cognex is benefiting from growth in its consumer electronics business, as well as other sectors.
Salesforce.com — Salesforce bought document-editing startup Quip for about $582 million. The cloud software maker already had an investment in Quip, and plans to operate it as a wholly owned subsidiary.
Twitter — Twitter communications chief Natalie Kerris has departed, just a few months after joining the company. Twitter chief marketing officer Leslie Berland will take over those duties.
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