Among the companies with shares expected to actively trade in Wednesday's session are Lennar Corp. (LEN, LENB), O'Reilly Automotive Inc. (ORLY) and Entropic Communications Inc. (ENTR).

Lennar's fiscal second-quarter profit soared from a year earlier, thanks in part to a tax-related gain, as the homebuilder saw stronger sales in its homebuilding unit and projected a slow and steady recovery process in the housing market. Shares jumped 5% to $28.80 in premarket trading.

O'Reilly said it expects its second-quarter earnings to be at the low end of its previous forecast, as the auto-parts retailer also lowered its same-store sales guidance. Shares slumped 14% to $82.89 premarket, dragging peers Advance Auto Parts Inc. (AAP) and AutoZone Inc. (AZO) lower as well.

Entropic Communications said it expects second-quarter results to be better than its prior estimates, due to strong results for its connectivity products. Shares of the chip-maker surged 22% to $4.98 premarket.

Omeros Corp. (OMER) plans to offer an undisclosed number of shares for the biopharmaceutical company's development of two medical products being tested for use in eye and knee surgeries and other general purposes. Shares dropped 19% to $10.75 premarket.

Alexza Pharmaceuticals Inc. (ALXA), which develops treatments for conditions affecting the central nervous system, said it plans to offer as much as $40 million in mixed securities, which may include stock. Shares were off 3.3% to $4.15 premarket.

Campus Crest Communities Inc. (CCG), which develops, builds and manages college student housing, said it will offer 6 million of its shares. Shares slumped 4.8% to $10.20 premarket.

 
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An Ohio court has granted Aetna Inc.'s (AET) request to temporarily stop the state from moving forward with its Medicaid contract process, as the insurer protests an Ohio agency's decision to cancel an earlier Medicaid contract it was awarded.

Atlantic Power Corp. (AT, ATP.T) said it will offer 5.5 million shares of its stock, intending to use the proceeds to fund a recently acquired wind-energy project under construction in Oklahoma.

AeroVironment Inc.'s (AVAV) fiscal fourth-quarter earnings edged up 0.9% as the company recorded an increase in unmanned aircraft revenue, though margins weakened.

Boeing Co. (BA) abruptly changed the chief executive of its commercial unit on the eve of a major air show where the jet maker is expected to announce significant orders for a new version of its 737 Max aircraft. Ray Conner, the senior vice president of sales and customer support for Boeing Commercial Airplanes, was named on Tuesday to replace Jim Albaugh, 62, once considered a CEO candidate.

Bristol-Myers Squibb Co. (BMY) has added $3 billion to its share repurchase program, as the pharmaceutical company looks to boost shareholder value.

Digital Realty Trust Inc.'s (DLR) upsized offering of 10 million shares of stock priced at a 0.8% discount to its Tuesday closing price.

Natural-gas utility Gas Natural Inc. (EGAS) said Chief Executive Richard M. Osborne will offer 700,000 shares of the company's stock.

Standard & Poor's Ratings Services downgraded GeoEye Inc. (GEOY) two notches, saying the satellite-imaging company faces heightened risk of lower U.S. government revenues.

H&R Block Inc.'s (HRB) fiscal fourth-quarter earnings fell 11%, as higher filing volume was masked by weaker revenue and losses from discontinued operations.

Liberty Global Inc. (LBTYA, LBTYB), along with investment funds tied to Searchlight Capital Partners LP, Tuesday agreed to acquire OneLink Communications, in a roughly $585 million deal expected to form Puerto Rico's largest cable operator.

Standard & Poor's Ratings Services placed its ratings for Ryder System Inc. (R) on watch for a possible downgrade after the truck-leasing company lowered its full-year earnings guidance last week.

Sealy Corp. (ZZ) swung to a second-quarter profit as the company posted wider margins, reflecting higher pricing on luxury mattress sales.

Write to Mia Lamar at mia.lamar@dowjones.com

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