July 15 (Reuters) - Concentra Group, a Select Medical ( SEM )

unit, is eyeing a valuation of $3.30 billion in its U.S.

initial public offering, joining a growing list of firms testing

the market after a near two-year dry spell.

The occupational health services company is aiming to sell

22.50 million shares in the offering, priced between $23 and $26

apiece, to raise as much as $585 million, it revealed in a

regulatory filing on Monday.

U.S. IPOs are on the road to recovery as stock markets scale

record highs and the economy shows resilience in the face of

higher interest rates, giving companies the confidence to move

ahead with their listings.

Concentra, founded in 1979, is now the largest provider of

occupational health services in the United States by number of

locations, according to its IPO prospectus.

Earlier this year, Select Medical ( SEM ) had announced its plan to

pursue the separation of Concentra, aiming to create two

independent and publicly traded companies.

Concentra is set to list on the New York Stock Exchange and

trade under the ticker symbol "CON".

J.P. Morgan, Goldman Sachs and BofA Securities are the lead

underwriters for the offering.