This week, four distributors stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Edgen Group Inc. Class A (EDG) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. Edgen Group is a holding company which distributes specialty products to the energy sector. In Portfolio Grader’s specific subcategory of Equity, EDG also gets an A. For more information, get Portfolio Grader’s complete analysis of EDG stock.

This week, Willis Lease Finance Corporation (WLFC) pushes up from a C to a B rating. Willis Lease Finance leases commercial aircraft engines and other aircraft-related equipment to air carriers, manufacturers, and overhaul/repair facilities worldwide. Shares of the stock have been trading at an exceptionally rapid pace, up threefold from the week prior. For more information, get Portfolio Grader’s complete analysis of WLFC stock.

Watsco, Inc. (WSO) improves from a C to a B rating this week. Watsco is an independent distributor of air conditioning, heating and refrigeration equipment and related parts and supplies in the United States. The stock’s dividend yield is 2.4%. For more information, get Portfolio Grader’s complete analysis of WSO stock.

Lawson Products, Inc. (LAWS) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. Lawson Products sells and distributes expendable maintenance, repair, and replacement products to OEM’s. Shares of the stock have been trading at an exceptionally rapid pace, up 1307% from the week prior. For more information, get Portfolio Grader’s complete analysis of LAWS 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.