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”).

ABM Industries Incorporated (ABM) improves from a B to a A rating this week. ABM Industries Incorporated is a facility services contractor that provides janitorial, parking, security, and engineering services for commercial, industrial, institutional, and retail facilities. The company also gets A’s in earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of ABM stock.

Tetra Tech, Inc. (TTEK) earns a A this week, jumping up from last week’s grade of B. Tetra Tech, Inc. is a global consulting and engineering company that serves public and private clients by addressing needs for water, environmental services and renewable energy. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of TTEK stock.

The rating of Brady Corporation Class A (BRC) moves up this week, rising from a B to a A. 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 surprise and earnings momentum. For more information, get Portfolio Grader’s complete analysis of BRC stock.

This week, Quad/Graphics, Inc. Class A (QUAD) pushes up from a B to a A rating. Quad/Graphics, Inc. Class A is a commercial printing company with image centers and photography studios nationwide and plants across the country. The company also gets A’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of QUAD stock.

CECO Environmental Corp. (CECE) boosts its rating from a C to a B this week. CECO Environmental Corp. provides air-pollution control technology products and services worldwide. The company also gets A’s in sales growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CECE 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.