DuPont, (DD: chart), attributed its results on tax and hurricane-related charges of 42 cents a share. If not for one-time items, DuPont would have gained 33 cents a share in Q3, beating analyst estimate of 29 cents per share. Revenue for Q3 rose to $6.3 billion from $6 billion in the year-ago period.

United Auto Group, (UAG: chart), automotive retailer, reported that Q3 net profit advanced 1.2% to 70 cents a share on 10.8% revenue growth, in line with analyst estimate. The company, which had a 7% increase in same-store retail sales, announced that the year-ago quarter benefited from the sale of investment, a reduction in its effective tax rate, a refund of U.K. consumption taxes and costs from the relocation of U.K. franchises.

Ameritrade Holding Corp., (AMTD: chart), securities brokerage services firm, announced its Q4 net income jumped to 23 cents a share, up from 14 cents a share a year ago on revenue growth, beating analyst estimate by a penny. Average client trades per day amounted to 146,000. The company stated it is in discussions with the SEC concerning ""accounting for and disclosure of its prepaid variable forward contracts with respect to its investment in approximately 7.9 million shares of Knight Capital Group, Inc.""

Chicago Mercantile Exchange Holdings, (CME: chart), stock exchange, reported that Q3 net income advanced 30% to $1.72 a share on revenue growth, including securities lending interest expenses up 22%. Average daily volumes totaled 4.2 million contracts in Q3, up 30%, on considerable volume growth on foreign exchange, interest rate and equity products.

Inco Ltd, (N: chart), metals producer, announced that Q3 net income dropped 56% to30 cents a share, down from 69 cents per share in the year-ago period, stating that nickel prices declined in Q3, missing analysts’ forecasts of 59 cents per share. Revenue advanced 2.2% to $1.07 billion.

Pentair, Inc., (PNR: chart), power-tool manufacturer, reported that Q3 net income fell to 46 cents a share, a cent down from the year-ago period despite 18% revenue growth. Earnings from continuing operations advanced 44% to 47 cents a share from 33 cents a share in the same time last year.

Sonic Automotive Inc., (SAH: chart), automotive retailer, announced that earnings from continuing operations in Q3 were 65 cents per share, up from 51 cents in the same period last year on 9.5% revenue growth. Results included charges of 7 cents to 9 cents a share due to hurricane disruption. On a same-store basis, revenue increased 6%.

Coventry Health Care Inc., (CVH: chart), care products and services provider, posted Q3 earnings of 81 cents a share, up from 64 cents per share in the year-ago period on revenue growth, in line with analyst estimate for a profit of 81 cents a share.. The company stated that, as of Sept. 30, its total health plan membership stood at 2.51 million, a rise of 61,000 members over the year-ago period.

Certegy Inc., (CEY: chart), credit and debit processing company, posted Q3 earnings of 37 cents a share, down from 43 cents a share in the same period a year ago despite revenue growth. Apart from non-recurring items, such as discontinued operations and merger-related costs, the company would have earned 48 cents a share, topping analyst estimate by a penny. The company expects Q4 adjusted earnings of 60 to 62 cents a share and revenue growth of 6% to 8%.

Lexmark International Group Inc, (LXK: chart), printing solutions manufacturer, posted Q3 earnings of 59 cents a share, down from $1.17 a share in the year-ago period on revenue decline, beating analyst estimate of 47 cents a share. The latest results incorporate a charge of 5 cents a share from a workforce reduction and a tax benefit of 5 cents a share, while the year-ago quarter incorporates a 15 cents per share tax benefit. The company stated that revenue from its laser and inkjet printer products declined 10% year-over-year due to more aggressive pricing and promotional activities and weak demand.

U.S. Steel Corp., (X: chart), steel products producer, posted Q3 earnings of 82 cents a share, down from $2.72 a share in the same time last year on sales decline, beating analysts’ expectations for a profit of 77 cents a share.

Lockheed Martin Corp., (LMT: chart), aerospace company and defense contractor, posted Q3 earnings 96 cents a share, up from 69 cents a share in the same period a year ago on sales growth, beating analyst estimate of 90 cents a share.