PrimeEnergy Corporation Joins Russell Microcap Index

FORTUNE Small Business announced that PrimeEnergy Corporation has been ranked twenty-four on the seventh annual FSB 100 list of the fastest growing small companies in America. The list, which is comprised of public companies, appears in the July/August 2007 issue of FORTUNE Small Business and is available at http://money.cnn.com/magazines/fsb/fsb100/2007/full_list/index.html.


To compile the seventh annual list, FORTUNE Small Business asked financial research firm Zacks to rank public companies with revenues less than $200 million and a stock price of more than $1, based on their percentage growth in earnings, revenue, and stock performance over the past three years. Banks and real estate firms were excluded.

"PrimeEnergy is pleased to be recognized for the third year in a row as one of the fastest growing small public companies in America," stated Charles E. Drimal, Jr., CEO.

PrimeEnergy Corporation was removed from the Russell 2000 index and added to the Russell Microcap(TM) Index when Russell Investment Group reconstituted its family of U.S. indexes on June 22, according to the official membership list posted on www.russell.com.

The Company's common stock is traded on the Nasdaq Stock Market under the symbol PNRG. If you have any questions on this release, please contact Joan Podlovits at (203) 358-5723.

This Report contains forward-looking statements that are based on management's current expectations, estimates and projections. Words such as "expects," "anticipates," "intends," "plans," "believes", "projects" and "estimates," and variations of such words and similar expressions are intended to identify such forward-looking statements. These statements constitute "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, and are subject to the safe harbors created thereby. These statements are not guarantees of future performance and involve risks and uncertainties and are based on a number of assumptions that could ultimately prove inaccurate and, therefore, there can be no assurance that they will prove to be accurate. Actual results and outcomes may vary materially from what is expressed or forecast in such statements due to various risks and uncertainties. These risks and uncertainties include, among other things, the possibility of drilling cost overruns and technical difficulties, volatility of oil and gas prices, competition, risks inherent in the Company's oil and gas operations, the inexact nature of interpretation of seismic and other geological and geophysical data, imprecision of reserve estimates, and the Company's ability to replace and expand oil and gas reserves. Accordingly, stockholders and potential investors are cautioned that certain events or circumstances could cause actual results to differ materially from those projected.


Contact:

PrimeEnergy Corporation
Joan Podlovits, 203-358-5723

Source: PrimeEnergy Corporation