This week, 4 Commercial Services & Supplies stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

This is a strong week for ADT Corporation (ADT). The company’s rating climbs to B from the previous week’s C. ADT Corporation provides electronic security, interactive home and business automation and alarm monitoring services industry in the U.S. and Canada. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of ADT stock.

Copart, Inc. (CPRT) boosts its rating from a C to a B this week. Copart, Inc. provides online auctions and vehicle remarketing services in the United States, Canada, and the United Kingdom. The company also gets A’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of CPRT stock.

This week, Brady Corporation Class A’s (BRC) ratings are up from a C last week to a B. Brady Corporation Class A makes and markets identification solutions and products that identify and protect premises, products, and people. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of BRC stock.

Cemtrex, Inc. (CETX) is seeing ratings go up from a C last week to a B this week. The company also gets A’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of CETX 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.