The grades of 3 Commercial Services & Supplies stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This is a strong week for Ritchie Bros. Auctioneers Incorporated (RBA). The company’s rating climbs to B from the previous week’s C. Ritchie Bros. Auctioneers Incorporated operates as an industrial auctioneer that sells through unreserved public auctions. The company also gets A’s in earnings growth, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of RBA stock.

SP Plus Corporation (SP) is seeing ratings go up from a C last week to a B this week. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of SP stock.

Versar, Inc. (VSR) shows solid improvement this week. The company’s rating rises from a C to a B. Versar, Inc. provides the government, municipalities, and the private sector with value-added, high quality innovative solutions for infrastructure, facilities management, construction, environmental quality, professional services, defense and homeland security needs. The company also gets A’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of VSR 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.