Shares of

W.W. Grainger

(GWW) - Get Report

were among the

NYSE's

winners Friday, rising 7% after the company reported second-quarter earnings that beat expectations.

The maintenance equipment company posted earnings of $81.6 million, or 89 cents a share, on sales of $1.37 billion. Analysts surveyed by Thomson First Call were expecting earnings of 82 cents a share on sales of $1.37 billion. A year ago the company earned $66.6 million, or 72 cents a share, on sales of $1.26 billion.

Looking ahead, W.W. Grainger now expects 2005 earnings of $3.40 to $3.60 a share, up from previously issued guidance of $3.20 to $3.45 a share. Analysts had been expecting earnings of $3.39 a share. Shares were recently trading up $4.20 to $61.45.

J.B. Hunt Transport Services

(JBHT) - Get Report

fell 6% after the trucking company reported second-quarter earnings that fell a penny short of expectations. The company earned $54.6 million, or 33 cents a share, on sales of $759 million. Analysts were expecting earnings of 34 cents a share on higher sales of $772.5 million. A year ago the company earned $45.6 million, or 27 cents a share, on sales of $679 million. Shares were trading down $1.17 to $19.82.

Shares of

Plug Power

(PLUG) - Get Report

rose 12% after the company said that it received an order for 63 GenCore fuel cell systems from Tyco Electronics Power Systems, a division of Tyco Electronics. "This sale is Plug Power's second significant order in the past month and we believe that this is indicative of the progress we are making toward our public milestone of 300 GenCore orders this year," Plug Power said. Shares were trading up 69 cents to $6.56.

Cintas

(CTAS) - Get Report

rose 11% after the provider of uniforms posted fourth-quarter results that topped forecasts. The company earned $83 million, or 48 cents a share, on sales of $809.2 million. Analysts were expecting earnings of 46 cents a share on sales of $805.7 million. A year ago the company earned $72.7 million, or 42 cents a share, on sales of $738.2 million. Looking ahead, Cintas expects fiscal 2006 earnings of $1.95 to $2.05 a share on sales of $3.35 billion to $3.45 billion. Analysts are expecting earnings of $1.98 a share on sales of $3.37 billion. Shares were trading up $4.38 to $44.18.

Shares of

National City

( NCC) rose 2% after the company posted second-quarter earnings that blew away forecasts. The banking company earned $625 million, or 97 cents a share. Analysts were expecting earnings of 75 cents a share. A year ago the company earned $519 million, or 83 cents a share. National City posted net interest income of $1.2 billion, up from $1.07 billion a year ago. Shares were trading up 55 cents to $36.31.

NYSE volume leaders included

Lucent Technologies

( LU), down 3 cents to $3.13;

General Electric

(GE) - Get Report

, down 53 cents to $35.10;

Pfizer

(PFE) - Get Report

, unchanged at $27.60;

Citigroup

(C) - Get Report

, down 29 cents to $46.21;

Motorola

( MOT), down 4 cents to $19.25;

Exxon Mobil

(XOM) - Get Report

, down 17 cents to $58.42;

Hewlett-Packard

(HPQ) - Get Report

, up 29 cents to $24.91;

Symbol Technologies

( SBL), down $1.19 to $11.27; and

McDonald's

(MCD) - Get Report

, up $1.07 to $30.67.

Nasdaq

volume leaders included

Sirius Satellite Radio

(SIRI) - Get Report

, down 7 cents to $6.66;

Microsoft

(MSFT) - Get Report

, down 12 cents to $25.85;

Intel

(INTC) - Get Report

, up 4 cents to $27.92;

Investors Financial Services

( IFIN), down $6.62 to $34.90;

Oracle

(ORCL) - Get Report

, unchanged at $14.05;

Cisco Systems

(CSCO) - Get Report

, down 9 cents to $19.85;

Sun Microsystems

(SUNW) - Get Report

, up 4 cents to $3.78;

Ciena

(CIEN) - Get Report

, up 6 cents to $2.37; and

Apple Computer

(AAPL) - Get Report

, up 4 cents to $40.29.