The grades of 5 Commercial Services & Supplies stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

G&K; Services, Inc., Class A (GK) shows solid improvement this week. The company’s rating rises from a C to a B. G&K; Services, Inc., Class A provides branded uniform and facility services programs in the United States, Canada, Ireland, and the Dominican Republic. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of GK stock.

MSA Safety, Inc. (MSA) earns a B this week, jumping up from last week’s grade of C. MSA Safety, Inc. develops, makes, and supplies products that protect people’s health and safety. The company also gets A’s in earnings surprise and return on equity. For more information, get Portfolio Grader’s complete analysis of MSA stock.

Herman Miller, Inc. (MLHR) boosts its rating from a C to a B this week. Herman Miller, Inc. researches, designs, manufactures, and distributes office furniture systems, products and related services. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of MLHR stock.

Knoll, Inc. (KNL) gets a higher grade this week, advancing from a C last week to a B. Knoll, Inc. designs and manufactures branded office furniture products and textiles. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of KNL stock.

Command Security Corporation (MOC) is seeing ratings go up from a C last week to a B this week. Command Security Corporation provides uniformed security officers, aviation security services and support security services to commercial, financial, industrial, aviation and governmental customers throughout the United States. For more information, get Portfolio Grader’s complete analysis of MOC 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.