Check out which companies are making headlines before the bell:
General Motors—The automaker earned an adjusted $1.29 per share for the second quarter, 21 cents above estimates, but revenue was well below forecasts, largely because of currency impact. GM did post a record North American profit, and said its second half of 2015 will be stronger than the first half.
McDonald's—McDonald's posted quarterly adjusted earnings of $1.26 a share, topping estimates, while revenue was slightly higher than estimates.
Caterpillar—The heavy equipment maker matched estimates with adjusted profit of $1.27 per share, but revenue was short, and the company also cut its revenue forecast for the year. Caterpillar cited currency impact and a soft economic environment, but said it is controlling costs and will be in position to take advantage of improving conditions when they occur.
Eli Lilly—The drug maker beat estimates by 16 cents with adjusted quarterly profit of 90 cents per share, with revenue also above estimates. Lilly also raised its full-year forecast, despite the expiration of some key patents, citing new drug approvals and significant pipeline progress.
PulteGroup—The homebuilder reported quarterly profit of 28 cents per share, 2 cents above estimate, though revenue was shy of analyst forecasts. The company saw an increase in profit margins as well as the highest values for its homes since 2007.
Fiat Chrysler—The company's Ferrari unit filed for a U.S. initial public offering, as part of its planned spin-off from Fiat Chrysler.
Apple—The company cut its projected capital spending budget for the current fiscal year by 8 percent, to $12 billion from $13 billion. Apple said in a Securities and Exchange Commission filing that the forecast was cut because it was able to spend more efficiently for manufacturing, and that there are no changes in its product plans.
Dunkin' Brands—Dunkin' earned an adjusted 50 cents per share for its latest quarter, beating estimates by two cents, with revenue also beating analyst projections. The results were helped by a 2.9 percent same-store sales increase for Dunkin' Donuts and a 3.4 percent rise for Baskin-Robbins.
Southwest Airlines—The airline earned $1.03 per share on an adjusted basis for its latest quarter, 1 cent above estimates, with revenue slightly short. The airline said its profit margins expanded significantly and cash flow was strong.
Comcast—The NBCUniversal and CNBC parent earned 84 cents per share for the second quarter, matching estimates, with revenue beating forecasts. Comcast said its total revenue per customer increased 4.5 percent from a year earlier.
Under Armour—The athletic apparel maker reported quarterly profit of 7 cents per share, 2 cents above estimates, with revenue well above forecast. Under Armour saw strong demand for both its Stephen Curry-branded shoes and its training apparel.
3M—3M beat estimates by 2 cents with quarterly profit of $2.02 per share, but revenue fell shy of forecasts. 3M noted a mixed economic environment, but said it was nonetheless able to expand profit margins.
American Express—The financial services giant earned $1.42 per share for its latest quarter, 10 cents above estimates. Revenue did fall below Street forecasts, but the company benefited from job cuts and other cost savings.
Cigna—Cigna is near a deal to be bought by rival health insurer Anthem for more than $48 billion, or about $187 per share, according to multiple reports.
Qualcomm—Qualcomm announced it would cut its workforce by 15 percent, implement $1.1 billion in cost reductions, and conduct a strategic review. The chip maker also reported adjusted quarterly profit of 99 cents per share, beating estimates by 4 cents, with revenue essentially in line.
Las Vegas Sands—Las Vegas Sands earned an adjusted 60 cents per share for its latest quarter, matching estimates, with revenue slightly below forecasts because of a slowdown in the casino operator's business in Macau.
SanDisk—SanDisk doubled analyst estimates with adjusted profit of 66 cents per share, with the memory chip maker's revenue also above estimates. SanDisk saw healthy sales growth and was helped by the introduction of new products.
Texas Instruments—Texas Instruments matched estimates with quarterly profit of 65 cents per share, with revenue also in line. However, the chip maker's current quarter earnings and revenue guidance is shy of Street forecasts, on weakness in personal computers and communications equipment markets.
Cheesecake Factory—Cheesecake Factory beat Street forecasts by 7 cents with quarterly profit of 69 cents per share, even with revenue falling slightly shy of estimates. Same-restaurant sales rose 2.8 percent, nearly double the year-ago figure, and the company also raised its quarterly dividend by 21 percent.
Xilinx—Xilinx reported quarterly profit of 55 cents per share, 1 cent above estimates, but the specialty chipmaker's revenue was short of expectations and profit fell 15 percent from a year earlier.
Bank of America—BofA has replaced its chief financial officer Bruce Thompson. The new CFO will be Paul Donofrio, who had been CFO on the bank's consumer bank and wealth management unit.
Unilever—Unilever profit fell 18 percent for the first half of the year, with per-share earnings down 10 percent. The consumer products giant is being helped by sales in emerging markets but continues to deal with softness in both North America and Europe.