Shares of

Bristow Group

(BRS) - Get Report

were among the

NYSE's

winners Friday, rising 5% after the provider of helicopter services to the oil and gas industry posted better-than-expected fiscal fourth-quarter results.

For the period ended March 31, the company earned $17.8 million, or 75 cents a share, on revenue of $201.3 million. Analysts polled by Thomson First Call expected earnings of 56 cents a share on revenue of $193.3 million. During the year-earlier period, the company earned $13.2 million, or 56 cents a share, on revenue of $170.5 million. Bristow Group said its earnings were driven by strength in Europe and Southeast Asia, which offset declines in North America. Shares were trading up $1.70 to $37.22.

Shares of

Georgia Gulf

(GGC)

sank 13% after the chemicals company announced an agreement to buy

Royal Group Technologies

( RYG) in a deal valued at $1.6 billion. Georgia Gulf will pay $11.82 a share for Royal Group, a Canadian producer of vinyl building and construction products. That price represents a 48% premium over Royal Group's close of $8 Thursday. Shares of Royal Group recently shot up $3.50, or 44%, to $11.50, while Georgia Gulf shares fell $3.86 to $26.63.

Overseas Shipholding

(OSG) - Get Report

rose 7% after the energy transportation services company announced a $300 million stock buyback plan. At current prices, the buyback represents about 15% of the company's outstanding shares. "Today's announcement demonstrates our confidence in OSG and its future, and represents a meaningful step in our ongoing commitment to further enhance value for shareholders," the company said. "It also reflects our strong belief that the company's current share price does not adequately reflect the fundamental value of the firm as measured by our substantial locked-in levels of earnings as well as future earnings prospects of our business." Shares were up $3.46 to $54.46.

Shares of

Michaels Stores

(MIK) - Get Report

fell 1% after the arts-and-crafts retailer said it would delay the filing of its fiscal first-quarter report because of an internal review into its option grant practices. The company said the review is focused on the period of 1990 to 2001. "At this time, the company is unable to determine whether any accounting adjustment might be required, the final amount of any accounting adjustment, if required, or whether such an adjustment will require a restatement of prior period financial statements or will be reflected in its fiscal 2006 results of operations," the company said. Michaels has notified its independent accounting firm and the

Securities and Exchange Commission

about the internal review. The company said it is working to file its quarterly report with the SEC by the fifth calendar day following the filing deadline

Meanwhile, Michaels said that its board continues to explore strategic alternatives aimed at enhancing shareholder value, which include the possible sale of the company. Shares were trading down 46 cents to $38.25.

Diana Shipping

(DSX) - Get Report

fell 1% after the company completed a follow-on stock offering. The shipping transportation company priced 7 million shares of stock at $9.50 a share, representing a 5% discount to Thursday's closing price of $10.02. The company also granted underwriters a 30-day option to buy an additional 1.05 million shares to cover over-allotments.

Separately, Diana Shipping also said it signed an agreement that grants the company an option to acquire a new Panamax dry bulk carrier. The company expects to take delivery of the vessel in July. Shares were trading down 13 cents to $9.89.

Shares of

Quiksilver

(ZQK)

rose 8% after the sports-related apparel company posted in-line fiscal second-quarter earnings. For the quarter ended April 30, the company earned $3.7 million, or 3 cents a share, on sales of $516.9 million. Analysts expected earnings of 3 cents a share on sales of $527.3 million. A year earlier, the company earned $34.7 million, or 28 cents a share, on sales of $426.9 million.

Looking ahead, Quiksilver continues to see fiscal 2006 earnings of 87 cents to 88 cents a share and sales of $2.25 billion to $2.27 billion. The guidance excludes 11 cents a share in stock-based compensation costs. Analysts project earnings, including stock-based compensation costs, of 76 cents a share, with sales of $2.27 billion. Shares were trading up 95 cents to $12.95.

NYSE volume leaders included

Lucent Technologies

( LU), up 1 cent to $2.43;

Texas Instruments

(TXN) - Get Report

, down 59 cents to $30.13;

Pfizer

(PFE) - Get Report

, down 30 cents to $23.56;

Corning

(GLW) - Get Report

, up $1.16 to $22.90;

Exxon Mobil

(XOM) - Get Report

, down 53 cents to $59.04;

General Electric

(GE) - Get Report

, down 29 cents to $34.28; and

Ford

(F) - Get Report

, up 10 cents to $6.76.

Nasdaq

volume leaders included

Intel

(INTC) - Get Report

, up 9 cents to $17.20;

Sun Microsystems

(SUNW) - Get Report

, up 10 cents to $4.33;

Level 3 Communications

(LVLT)

, up 3 cents to $4.56;

JDSU

(JDSU)

, up 4 cents to $2.79;

Microsoft

(MSFT) - Get Report

, down 3 cents to $22.08;

Cisco Systems

(CSCO) - Get Report

, up 26 cents to $20.15;

Apple Computer

(AAPL) - Get Report

, down 87 cents to $59.89;

Oracle

(ORCL) - Get Report

, down 5 cents to $13.48; and

Finisar

(FNSR) - Get Report

, up 10 cents to $3.46.