Among the companies whose shares are expected to see active trade in Thursday's session are Hilton Hotels Corp., Healthways Inc. and General Motors Corp.

Healthways Inc. (HWAY) is expected to report fiscal third-quarter earnings of 29 cents a share, according to a poll of analysts by Thomson Financial.

After Tuesday's closing bell, Hilton Hotels Corp. (HLT) agreed to be acquired by Blackstone Group (BX) in a $26 billion deal that will add one of the largest U.S. hotel chains to the list of companies bought out by private-equity firms this year.

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Allied Healthcare International Inc. (AHCI) said Timothy Aitken is resigning as chairman and chief executive, effective immediately.

AMR Corp.'s (AMR) American Airlines said traffic in June fell 3.5 percent from a year ago, as capacity decreased 5.4 percent. Load factor, or the percentage of a plane filled with passengers, rose 1.7 percentage points to 87.1 percent. Separately, AMR's American Eagle Airlines said June traffic fell 2.4 percent as capacity fell 2.2 percent. The airline reported a June load factor of 80.3 percent versus 80.5 percent a year ago.

Apollo Group Inc. (APOL) said the Securities and Exchange Commission has notified the company that it has completed its investigation and does not plan to recommend any enforcement action. Phoenix-based Apollo is a provider of education programs and services.

General Motors Corp. (GM) posted a 21.3 percent plunge in June U.S. light vehicle sales, placing the blame on a planned move away from rental car sales as well as a tough industry climate and aggressive promotions by rivals.

Meridian Gold Inc. (MDG) said that Yamana Gold Inc.'s (AUY) unsolicited acquisition proposal does not provide a basis to enter into merger talks.

LCC International Inc. (LCCI) said it's eliminating roughly 60 positions worldwide and consolidating certain facilities in the U.K. as part of its recent WFI acquisitions. The workforce reduction is expected to reduce expenses by roughly $5.2 million a year. The McLean, Va.-based provider of wireless voice and data services said it expects to take $2.3 million charge, primarily in its second and third quarters, related to the actions.

Penson Worldwide Inc (PNSN) said it now expects 2007 earnings of $1.20 to $1.24 a share. The Dallas-based provider of securities-processing infrastructure products and services previously said it was "comfortable" with the consensus analysts' estimate of $1.35 to $1.44 a share.

Tecumseh Products Co. (TECUA) (TECUB) has agreed to sell the majority of its electrical components business to Regal Beloit Corp. (RBC) for $220 million in cash, the companies said. Regal-Beloit expects the acquired businesses to add 10 cents to 15 cents a share to earnings in 2008, along with roughly $290 million in sales. The deal is expected to close in the third quarter.

Toyota Motor Corp. (TM) said sales at its U.S. unit increased 10.2 percent in June to 245,739 vehicles from 223,018 a year earlier, when there was one fewer selling day. Toyota Division's sales grew 11 percent to 216,870 vehicles from 195,332, as passenger car sales grew to 145,696 vehicles from 133,611 vehicles. On an adjusted basis, the division's sales rose 6.9 percent. Lexus brand sales rose slightly to 28,869 vehicles from 27,686 a year earlier. Light truck sales in June climbed to 100,043 from 89,407.

UAL Corp.'s (UAUA) United Airlines reported traffic in June fell 0.3 percent from last year as capacity decreased 1.2 percent. The Chicago-based airline said its June load factor, or the percentage of its planes filled with passengers, came in at 89.1 percent versus 88.3 percent a year ago.