The grades of 4 Gas Utilities stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Atmos Energy Corporation (ATO) earns a A this week, jumping up from last week’s grade of B. 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.

The rating of Southwest Gas Corporation (SWX) moves up this week, rising from a B to a A. Southwest Gas Corporation is engaged in the business of purchasing, distributing and transporting natural gas to customers in three states. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of SWX stock.

This is a strong week for New Jersey Resources Corporation (NJR). The company’s rating climbs to B from the previous week’s C. New Jersey Resources Corporation provides retail and wholesale energy services to customers in New Jersey and in states from the Gulf Coast to New England, and Canada. For more information, get Portfolio Grader’s complete analysis of NJR stock.

South Jersey Industries, Inc. (SJI) is seeing ratings go up from a C last week to a B this week. South Jersey Industries, Inc. provides a variety of energy-related products and services. For more information, get Portfolio Grader’s complete analysis of SJI 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.