3 Commercial Services & Supplies stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Waste Connections, Inc. (WCN) gets a higher grade this week, advancing from a B last week to a A. Waste Connections, Inc. is an integrated solid waste services company that provides solid waste collection, transfer, disposal and recycling services in mostly secondary markets in the western and southern United States. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of WCN stock.

Waste Management, Inc. (WM) is seeing ratings go up from a B last week to a A this week. Waste Management, Inc. provides collection, transfer, recycling, disposal and waste-to-energy services. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of WM stock.

Healthcare Services Group, Inc. (HCSG) earns a A this week, jumping up from last week’s grade of B. Healthcare Services Group, Inc. provides housekeeping, laundry, linen, facility maintenance, and dietary services to the health care industry in the United States. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of HCSG 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.