Shares of

Amvescap

( AVZ) were among the

NYSE's

winners Wednesday, rising 14% after the asset management company confirmed that it received an unsolicited approach from Toronto's

CI Fund Management

to buy its Canadian operations.

Amvescap, which owns the AIM and Invesco mutual fund families, said its board considered the acquisition interest but "unanimously concluded that it is not in the best interests of shareholders." CI also indicated, according to Amvescap, that it might have an interest in buying all of Amvescap. "The board of Amvescap doubts that CI has the ability to make a firm offer for Amvescap at a level that would be in the best interests of Amvescap's shareholders," Amvescap said in a statement. Shares were recently trading up $1.75 to $14.01.

Ultralife Batteries

(ULBI) - Get Report

rose 9% after the company received multiyear contracts worth up to $25 million from

General Motors

(GM) - Get Report

and one of its joint venture partners. The contracts call for Ultralife to produce and supply custom-designed Ultralife HiRate nonrechargeable lithium backup batteries for GM's OnStar Telematics system. The batteries will be used in two of GM's vehicle platforms. Shares were trading up $1.52 to $17.88.

Shares of

Lifeway Foods

(LWAY) - Get Report

rose 18% after the company previewed second-quarter sales that rose 27% from a year ago. The maker of cultured dairy products posted sales of $5.1 million. A year ago the company reported sales of $4 million. The single-analyst estimate called for sales of $4.7 million, according to Thomson First Call. The company said that it would report its full results on Aug. 15. Shares were trading up $2.18 to $14.33.

Schnitzer Steel

(SCHN) - Get Report

rose modestly after the company posted third-quarter financial results. The metal recycler and steel manufacturer reported earnings of $33.5 million, or $1.08 a share, on sales of $226.8 million. A year ago, the company posted earnings of $42.5 million, or $1.37 a share, on sales of $193.8 million. Looking ahead, Schnitzer expects fourth-quarter net selling prices in its recycled metals business to be lower than the $230 per ton average reported during the third quarter but above the $199 per ton average that it posted during last year's fourth quarter. Fourth-quarter sales volumes, meanwhile, are expected to be below fiscal 2005's quarterly run rate, but total fiscal 2005 sales should be about equal to last year's level, the company said. Shares were trading up 8 cents to $24.73.

Shares of

Huntsman

(HUN) - Get Report

rose 4% after the chemicals maker said that it would sell its toluene diisocyanate business to BASF for an undisclosed amount. The sale also includes the transfer of Huntman's customer list and sales contracts. The manufacturing plant, which will not be transferred as part of the deal, will be shut down. Huntsman expects to record charges of about $39 million in association with the sale, with the bulk of the writedown taking place during the second quarter of 2005. Shares were trading up 84 cents to $21.57.

NYSE volume leaders included

Pfizer

(PFE) - Get Report

, down 26 cents to $26.79;

MBNA

( KRB), down 4 cents to $25.49;

Nortel Networks

( NT), down 2 cents to $2.55;

Elan

(ELN)

, up 34 cents to $7.16;

Bank of America

(BAC) - Get Report

, down 27 cents to $44.84;

Exxon Mobil

(XOM) - Get Report

, down 32 cents to $59.82;

Lucent Technologies

( LU), down 1 cent to $2.96; and

General Electric

(GE) - Get Report

, down 13 cents to $34.59.

Nasdaq

volume leaders included

Oracle

(ORCL) - Get Report

, up 18 cents to $13.45;

Sun Microsystems

(SUNW) - Get Report

, up 7 cents to $3.71;

Microsoft

(MSFT) - Get Report

, down 4 cents to $24.94;

Intel

(INTC) - Get Report

, up 18 cents to $26.86;

Cisco Systems

(CSCO) - Get Report

, up 15 cents to $18.97; and

Amegy Bancorp

(ABNK)

, down 84 cents to $22.14.