This week, 3 Gas Utilities stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

The rating of Atmos Energy Corporation (ATO) moves up this week, rising from a B to a A. Atmos Energy Corporation is engaged in the business of regulated natural gas distribution, transmission and storage. The company also gets A’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of ATO stock.

Laclede Group, Inc. (LG) improves from a B to a A rating this week. Laclede Group, Inc. is involved in the retail distribution of natural gas. The company also gets A’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of LG stock.

Chesapeake Utilities Corporation (CPK) earns a A this week, jumping up from last week’s grade of B. Chesapeake Utilities Corporation is a utility company engaged in the distribution, transmission, and marketing of natural gas; the distribution and wholesale marketing of propane; advanced information services; and other related businesses. The company also gets A’s in earnings growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CPK stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.