Zacks Upgrades and Revisions Strategy highlights: Dril-Quip, Inc., Energizer Holdings, Inc., Greif, Inc. and NATCO Group, Inc.

CHICAGO -- Earnings estimate revisions are the most powerful force impacting stock prices. Couple that with the proven benefits of upgrades in ratings from brokerage firms and you have a strategy that delivered a +16.5% return in the first five months of 2006. Four stocks meeting this screen's exclusive criteria are: Dril-Quip, Inc. (NYSE: DRQ), Energizer Holdings, Inc. (NYSE: ENR), Greif, Inc. (NYSE: GEF) and NATCO Group, Inc. (NYSE: NTG). View the entire list of stocks for the Upgrades and Revisions Profit Track at http://at.zacks.com/?id=1844

Here are details on four companies currently identified by the Upgrades and Revisions Profit Track:

Dril-Quip, Inc. (NYSE: DRQ) is a Zacks #1 Rank (Strong Buy) company. DRQ reported second-quarter earnings per share of 49 cents, which surpassed the consensus of 44 cents by a solid 11%. In the prior-year period, the company posted profits of 19 cents per share. Total revenues increased approximately 35% to $108.5 million. DRQ satisfies the criteria for this Profit Track as evidenced by its earnings per share growth of 29% over the past five years.

Energizer Holdings, Inc. (NYSE: ENR) posted earnings per share of 82 cents for the third quarter, which ended June 30. This amounted to a 24% positive earnings surprise and a 22% year-over-year improvement. ENR beat the Street's estimate in seven out of the past eight quarters. Sales rose to $734.9 million from $691.2 million a year ago. This Zacks #1 Rank stock experienced earnings per share growth of nearly 31% over the past five years.

Greif, Inc. (NYSE: GEF) crushed the consensus earnings estimate for the third quarter by 32% with profits of $1.45 per share. Compared to the prior-year period, earnings soared 65%. Net sales came in at $690.5 million compared to $609.0 million in the third quarter of 2005. This Zacks #1 Rank stock raised its fiscal 2006 EPS guidance, which excludes special items, by 40 cents for its Class A common stock to between $4.25 and $4.35. GEF's earnings per share growth over the past five years amounted to nearly 22%.

NATCO Group, Inc. (NYSE: NTG) recently reported second-quarter earnings per share of 50 cents, which represented a new record for the company. The result easily surpassed the prior-year total of 16 cents and beat the consensus estimate by 22%. The Zacks #1 Rank stock upped its full-year profit guidance to between $1.75 and $1.85 per share. During the past five years, NTG's earnings per share grew approximately 23%.

Discover all the current stocks currently on the Upgrades and Revisions Profit Track at: http://at.zacks.com/?id=1869

About Profit Tracks

What is a "Profit Track"? Each Profit Track is a successful stock picking strategy with proven results through the Bear Market of 2001-2002 and the Bull run started in 2003. On Zacks.com we have created these nine unique screens to offer investors great strategies to potentially outperform the market in the years ahead. For the first five months of 2006, the Low Price Stocks strategy was the top performing Profit Track with a return of +22.2% followed by the Discounted Fundamental screen with a +18.6% return. To see all nine strategies along with philosophy, past performance and current stocks, go to http://at.zacks.com/?id=1838

All the Profit Track strategies were created and backtested using the Research Wizard software from Zacks Investment Research. If you like this screening strategy, but want to narrow down the list of stocks and even improve the performance, then you should start a free trial to this powerful stock picking tool. Learn more about the Research Wizard free trial offer and our new special report "Top 10 Stock Screening Strategies" at http://at.zacks.com/?id=2156

About Zacks

Zacks.com is a property of Zacks Investment Research, Inc., which was formed in 1978 by Leonard Zacks. As a PhD in mathematics Len knew he could find patterns in stock market data that would lead to superior investment results. Amongst his many accomplishments was the formation of his proprietary stock picking system; the Zacks Rank, which continues to outperform the market by nearly a 3 to 1 margin. The best way to unlock the profitable stock recommendations and market insights of Zacks Investment Research is through our free daily email newsletter; Profit from the Pros. In short, it's your steady flow of Profitable ideas GUARANTEED to be worth your time! Register for your free subscription to Profit from the Pros at http://at.zacks.com/?id=1841

Zacks Investment Research is under common control with affiliated entities (including a broker-dealer and an investment adviser), which may engage in transactions involving the foregoing securities for the clients of such affiliates.

(a) The S&P 500 Index ("S&P 500") is a well-known, unmanaged index of the prices of 500 large-company common stocks selected by Standard and Poor's. The S&P 500 includes the reinvestment of all dividends, no transaction costs, and represents the gross returns before management fees.

Disclaimer: Past performance does not guarantee future results. Investors should always research companies and securities before making any investments. Nothing herein should be construed as an offer or solicitation to buy or sell any security.