Top Tankers ( TOPT) climbed Thursday after the Greek oil shipping company saw a surge in first-quarter income. The company reported income of $30.4 million or $1.06 a share, up from $19.1 million, or 69 cents a share, a year ago. Revenue totaled $101.7 million, up from $47.3 million a year ago.

The most recent quarter includes a charge of $3.2 million, or 12 cents a share. As of March 31, the company's fleet consisted of 27 vessels, or 2.6 million dry-weight tons, compared with 18 vessels, or 1.3 million dry-weight tons, a year ago. Shares gained 71 cents, or 8.9%, to $8.73 in recent trading.

Shares of Cosi ( COSI) slumped after the Deerfield, Ill.-based restaurant chain operator reported a wider first-quarter loss. The company lost $3.9 million, or 10 cents a share, compared with a loss of $2.8 million, or 9 cents a share, a year ago. Excluding stock compensation expenses, Cosi's loss for the quarter was $2 million, or 5 cents a share, compared with $2.5 million, or 8 cents a share, a year ago.

Revenue totaled $29.6 million, up from $27.2 million. Analysts were looking for a loss of 5 cents a share on revenue of $30.5 million. Comparable restaurant sales, as measured for restaurants in operation for more than 15 months, increased 5.3%. The company said it still expects to achieve 2006 earnings guidance between 6 cents to 11 cents a share, excluding stock-based compensation expense. Shares dipped 95 cents, or 9.8%, to $8.75 in recent trading.

MTR Gaming Group ( MNTG) gained after the Chester, W.V.-based gaming, horseracing and hotel developer said first-quarter revenue grew 22% to $93 million. The company reported income of $3.4 million, or 12 cents a share, up from $2.9 million, 10 cents a share, a year ago.

The company said gaming revenue increased because of a generally mild winter, targeted campaigns, and new game themes and enhanced slot products to help its Mountaineer facility stand out from the competition. Shares climbed 61 cents, or 6.6%, to $9.85 in recent trading.

Input/Output ( IO - Get Report) stumbled after the Stafford, Texas-based oil and natural gas services company missed Wall Street's first-quarter expectations. The company posted a loss of $3.3 million, or 4 cents a share, on revenue of $86.3 million, compared to a restated loss of $8.1 million, or 10 cents a share, on revenue of $62 million.

Two analysts polled by Thomson First Call were looking for earnings of 5 cents a share. In spite of the slow start to 2006, CEO Bob Peebler said the company remained optimistic about its annual revenue guidance of $410 million to $450 million, with earnings ranging from 20 cents to 35 cents a share. Input/Output lost 67 cents, or 6.5%, to $9.68 in recent trading.

Koppers Holdings ( KOP - Get Report) gained after the Pittsburgh-based treated wood products company saw first-quarter sales rise to $264.6 million, up from $232 million a year ago.

The company posted a loss of $6 million, or 41 cents a share, compared with a profit of $600,000, or 4 cents a share, a year ago. Excluding charges, the company earned $5.5 million, or 27 cents a share. Its revenue grew to $264.6 million from $232 million a year ago. Analysts were looking for earnings of 11 cents on revenue of $248.2 million. "We are very pleased with the results for our first quarter as the company's sales and margins exceeded projections," said President and CEO Walter W. Turner in a statement. Shares gained $2.02, or nearly 10%, to $22.32 in recent trading.