Check out which companies are making headlines before the bell:
Transocean—The oilfield services company said it would take a $2.76 billion impairment charge against third quarter earnings, and would delay reporting its results. The charge is related to the precipitous drop in day rates for oil rigs that have impacted the industry.
Humana—The health insurer earned $1.85 per share for the third quarter, 15 cents below estimates, with revenue missing as well. Humana cites increased investments in health exchanges and higher specialty drug costs. However, it still expects to meet its prior full-year guidance.
Sears Holdings—The retailer is exploring the idea of selling up to 300 of its stores to a real estate investment trust, which it would then offer to shareholders through a rights offering as a means of raising cash. Separately, Sears said third quarter same-store sales would likely be flat compared to the same quarter a year ago.
GNC—Goldman Sachs upgraded the nutritional products seller's shares to "buy" from "neutral," pointing to GNC's strategic turnaround and its move to break away from heavy promotional activity. At the same time, it downgraded competitor Vitamin Shoppe to "neutral" from "buy," pointing to the lack of margin recovery.
Walt Disney—The media and theme park company matched estimates with quarterly profit of 89 cents per share. Revenue beat forecasts, helped by growth in the media and studio entertainment units. Separately, Disney said a fourth "Toy Story" movie will be released in 2017.
Bank of America—The bank tripled its previously reported third quarter loss, citing legal expenses related to currency trading investigations.
Zynga—The online game maker lost an adjusted 1 cent per share for its latest quarter, matching estimates, with revenue beating forecasts. Zynga also posted a 15 percent rise in expected bookings, which measures future revenue trends, more than analysts had been forecasting.
Gap—The company reported a three percent drop in October same-store sales, below Street estimates, but the clothing retailer is still predicting quarterly profit that exceeds current analyst forecasts.
Nike—The footwear and apparel company said Minnesota Vikings running back Adrian Peterson is no longer a Nike athlete, following his no-contest plea in his court case involving alleged child abuse.
Home Depot—The retailer said a security breach exposed 53 million more email addresses than it had reported in September, when it revealed that about 56 million payment cards had been compromised. Home Depot said the additional emails did not contain any payment card information.
King Digital—The maker of the popular "Candy Crush Saga" game beat estimates by 9 cents with adjusted quarterly profit of 56 cents per share, with revenue well above estimates as well. King also announced a $150 million stock buyback.
Nvidia—Nvidia reported quarterly profit of 31 cents per share, 3 cents above estimates, with revenue also beating consensus. The company's results were fueled by sales of its newest graphics chips for personal computers, as well as chips designed to be used in automobiles.
Salix Pharmaceutical—The drug maker missed estimates on both the top and bottom lines, saying that inventories of its key treatments rose to at least a five-month supply. Previously, Salix had said it had only a few weeks' worth of inventory.
Walgreen—The drugstore chain received an unfavorable ruling from a Chicago court in a defamation filed by its former chief financial officer Wade Miquelon. The court ruled against Walgreen's move to seal certain information that it had deemed confidential.
PetSmart—The pet supplies retailer may be closer to being sold, with the Wall Street Journal reporting that several private equity firms have been invited to submit final round bids for PetSmart.
AVG Technologies—The maker of anti-virus and other security software has been approached by potential buyers, according to the Journal.
Norfolk Southern and CSX—The two railroad stocks are getting a boost from reported comments by Pershing Square's Bill Ackman, who is said to have told a conference in Chicago that Canadian Pacific may be seeking to merge with a CSX rival.