Among the companies whose shares are expected to see active trade in Wednesday's session are TiVo Inc., Pfizer Inc. and Tribune Co.

Aeropostale Inc. (ARO) is expected to report earnings per share for the third quarter of 51 cents, according to analysts polled by Thomson First Call.

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Bon-Ton Stores Inc. is expected to post a per-share loss of 45 cents for the third quarter.

Opsware Inc. (OPSW) is expected to report a breakeven per-share result for the third quarter.

Synopsys Inc. (SNPS) is expected to report fourth-quarter income of 19 cents per share.

Tiffany & Co. (TIF) is expected to report third-quarter earnings of 16 cents per share.

TiVo (TIVO) is expected to post a third-quarter per-share loss of 14 cents.

After Tuesday's closing bell, Pfizer (PFE) said it plans to cut 20 percent of its United States sales force as the first step in its comprehensive review of operations. See full story.

Watch list

Abraxis BioScience Inc. (ABBI) said the Food and Drug Administration has granted approval of its abbreviated new drug application for its combination drug ampicillin and sulbactam for injection, 15g. The drug is the generic equivalent of Pfizer Inc.'s Unasyn, and indicated to treat several skin and skin structure, intra-abdominal and gynecological infections.

Ameriprise Financial Inc. (AMP) said its board has amended the company's by-laws to provide for majority voting for directors in uncontested elections. The new system will begin with the next election, scheduled for April.

Arena Pharmaceuticals Inc. (ARNA) said it plans to publicly offer 8 million shares, and the underwriters have a 30-day option to buy up to an additional 1.2 million shares to cover over-allotments.

Chico's FAS (CHS) said a slump in same-store sales, coupled with aggressive expansion and merchandising "missteps," dragged down third-quarter profit. The retailer said quarterly income was $42 million, or 24 cents a share, compared with $53 million, or 29 cents a share, in the year-ago quarter. See After Hours column.

Comcast Corp. (CMCSK) (CMCSA) said it has named Michael Angelakis to serve as the new co-chief financial officer. Angelakis, a managing director of a private equity firm Providence Equity Partners, is expected to join Comcast at the end of the first quarter of 2007 as co-CFO, and to become CFO in 2008.

Cott Corp. (COT) said Chief Financial Officer Clyde Preslar plans to leave the company to pursue other interests, effective Friday. The beverage company said it has named Tina Dell'Aquila, controller, as interim CFO.

Dress Barn Inc. (DBRN) said first-quarter net earnings rose to $27.4 million, or 40 cents a share, from $20.4 million, or 32 cents a share, in the same period last year, on the back of strong sales. See After Hours column.

Duke Energy Corp. (DUK) said its board has approved an employee incentive target for 2007 of $1.15 a share.

Dynavax Technologies Corp. (DVAX) said it achieved statistically significant results from the primary endpoint analysis of a Phase III trial comparing Heplisav, its hepatitis B virus vaccine, to GlaxoSmithKline's (GSK) Engerix-B vaccine. See After Hours column.

Gottschalks Inc. (GOT) said its third-quarter net loss widened to $2.75 million, or 20 cents a share, from $1.63 million, or 12 cents a share, in the same period last year, as revenue fell and costs and expenses rose.

Linn Energy LLC (LINE) named Mark Ellis as chief operating officer and said it plans to relocate its corporate headquarters to Houston from Pittsburgh.

Microchip Technology Inc. (MCHP) backed its view for third-quarter sales of $255 million and earnings per share of 33 cents.

NaviSite Inc. (NAVI) said its first-quarter net loss narrowed to $2.64 million, or 9 cents a share, from $3.47 million, or 12 cents a share, in the same period last year, as revenue grew and operating expenses shrunk.

NiSource Inc. (NI) said Gary Neale, chairman and former president and chief executive, has decided not to stand for reelection to the company's board at its annual meeting in May 2007. Effective Nov. 29, Ian Rolland, a director, will take on the role of chairman.

Papa John's International Inc. (PZZA) said domestic comparable sales were down 0.3% in November.

Principal Financial Group Inc. (PFG) said its board has authorized buying back up to $250 million of the company's shares. The financial services company added that it has increased by $100 million the amount of its 30-year fixed-rate senior notes offering, bringing the total to $600 million.

Restoration Hardware Inc. (RSTO) reported a third-quarter net loss of $5.71 million, or 15 cents a share, compared with a net loss of $4.21 million, or 11 cents a share, during the year-ago period. The home accessories retailer posted revenue of $157.1 million vs. $128.4 million.

Sigma Designs Inc. (SIGM) said third-quarter revenue rose to $25.1 million from $8.5 million during the same period in the prior year. The digital media processor company cited higher chipset sales to manufacturers of IPTV set-top boxes. Also, the board audit committee is reviewing the company's stock-option practices, and the company did not announce income for the quarter.

Communications-equipment maker 3Com Corp. (COMS) said it has agreed to buy Huawei Technologies' 49% stake in the joint venture Huawei-3Com Ltd. for $882 million. See full story.

A "strategic review" at Tribune (TRB) has "generated strong interest from a number of parties." The company said advisers have recommended that the review process be extended. See full story.

VA Software Corp. (LNUX) said the first-quarter net loss narrowed, as revenue gained, to $336,000, or a penny share, from a net loss of $1.23 million, or 2 cents a share, during the same period in the prior year.

Walt Disney Co. (DIS) said its board has raised the annual cash dividend 14.8% to 31 cents per share. The dividend is payable Jan. 12 to shareholders as of Dec. 15.

Wells Fargo & Co. (WFC) said its board has amended the company's by-laws to adopt a majority vote standard for uncontested director elections.

Wheeling-Pittsburgh Corp. (WPSC) said fourth-quarter results will be below expectations due to weaker-than-expected market conditions. The steel company said it sees negative earnings before interest, taxes, depreciation and amortization.

Wyndham Worldwide Corp. (WYN) said it is planning to offer $500 million of senior unsecured notes due 2016. The hotel and hospitality company said it plans to use the proceeds to repay $350 million of the principal under its existing interim loan facility, and a portion of its revolver.

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