Among the companies with shares expected to actively trade premarket are Hewlett-Packard Co. (HPQ), Microsoft Corp. (MSFT), and Zumiez Inc. (ZUMZ).

Research firm IDC issued an alarming report Wednesday for PC makers, saying world-wide shipments of laptops and desktops fell 14% in the first quarter from a year earlier, the sharpest drop since IDC began tracking the data in 1994. Rival research firm Gartner Inc. (IT), meanwhile, estimated global shipments sank 11.2%, which is called the worst drop since the first quarter of 2001. PC-maker Hewlett-Packard dropped 5.5% to $21.10 premarket. Meanwhile, Microsoft earned a downgrade from Goldman Sachs to sell as consumers gravitate to tablets, which unlike PCs, aren't dominated by Microsoft's operating system. Shares fell 3.6% to $29.18 premarket.

Teen retailer Zumiez's same-store sales for March rose 2.1%, topping expectations of Wall Street analysts. Analysts surveyed by Thomson Reuters had forecast a same-store sales decrease of 7.5%. Shares climbed 9.4% to $27.25 premarket.

Fortinet Inc. (FTNT) cut its first-quarter earnings and revenue guidance, as the network-security company said billings are lower than expected. Shares dropped 18% to $18.03 in premarket trading.

Acadia Pharmaceuticals Inc. (ACAD) said the U.S. Food and Drug Administration has decided that data from a late-stage study, together with supportive data from other studies, are sufficient to support the filing of a New Drug Application for its pimavanserin drug for the treatment of Parkinson's disease psychosis. Shares jumped 46% to $11.65 premarket.

Pier 1 Imports Inc. (PIR) predicted restrained earnings growth this fiscal year as it continues to invest. The home-furnishings retailer is in the midst of an extensive investment period, including the rollout of a new point-of-sale system, increased hiring and training, and a ramped-up online store. Shares fell 3.4% to $22.55 premarket.

Medical-device maker Sunshine Heart Inc. (SSH, SHC.AU) plans to offer an undisclosed number of shares, intending to use the proceeds for clinical trials and product development, and other general purposes. Shares fell 6% to $5.65 in premarket trading.

Fifth Street Finance Corp. (FSC) has launched an offering of 13.5 million shares, planning to use the proceeds to pay down debt and to re-borrow money to invest in small and mid-sized companies. The specialty finance firm recently had around 106.2 million shares outstanding. Shares fell 2.6% premarket to $10.69.

Yum Brands Inc. (YUM) said same-store sales in its China division fell 13% in March, a larger decline than analysts had expected, and also said publicity associated with the Avian flu in China in the past week has significantly hurt KFC results. Shares slipped 2.2% to $65.29 premarket.

 
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Apogee Enterprises Inc.'s (APOG) fiscal fourth-quarter profit rose 48% as the industrial-glass manufacturer reported improved results at its architectural segment and stronger margins. However, earnings and revenue were below expectations.

Bed Bath & Beyond Inc.'s (BBBY) fiscal fourth-quarter earnings rose 6.5% as the retailer posted double-digit sales growth, with a boost from an extra week of sales. Earnings were ahead of expectations.

Burger King Worldwide Inc. (BKW) Chief Executive Bernardo Hees will leave to take the helm of H.J. Heinz Co. (HNZ) once the acquisition of the ketchup maker by Berkshire Hathaway Inc. (BRKA, BRKB) and private-equity firm 3G Capital is complete.

Integra LifeSciences Holdings Corp. (IART) said it is voluntarily recalling certain products due to production concerns, and offered guidance below analyst estimates for the first and second quarters.

Investment firm Crest Financial Ltd. has filed a preliminary proxy statement urging Clearwire Corp. (CLWR) shareholders to vote against the company's planned acquisition by Sprint Nextel Corp. (S), the latest step in its ongoing effort to block the $2.2 billion deal.

Chevron Corp. (CVX) said Wednesday its oil production and refining-business activity was lower in the first two months of 2013 than the full first quarter of 2012 because of widespread maintenance issues.

Deutsche Telekom AG (DTEGY, DTE.XE) sweetened its offer for U.S. wireless carrier MetroPCS Communications Inc. (PCS), hoping to save a merger deal that shareholders had threatened to reject. Late Wednesday, Deutsche Telekom submitted what it called its "best and final offer" to MetroPCS. The revised terms lower the amount of debt that will be transferred to the new company by $3.8 billion and cut the interest rate on that debt by half a percentage point.

Protective Life Corp. (PL) has agreed to acquire MONY Life Insurance Co. from AXA SA (CS.FR, AXAHY) and reinsure certain life insurance policies written by a MONY subsidiary for about $1.06 billion, a deal the company said will produce a steady stream of earnings for many years to come.

Ruby Tuesday Inc.'s (RT) fiscal third-quarter earnings fell 52% as the casual-dining chain was hampered by restaurant closure costs and weaker same-store sales.

Write to Anna Prior at anna.prior@dowjones.com

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