The grades of 3 Construction & Engineering 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.

Dycom Industries, Inc. (DY) is seeing ratings go up from a B last week to a A this week. Dycom Industries, Inc. provides the telecommunications and infrastructure industry with specialty contracting services, including engineering, construction, maintenance, and installation services for telecommunications providers. The company also gets A’s in sales growth, operating margin growth, earnings growth, and return on equity. For more information, get Portfolio Grader’s complete analysis of DY stock.

Argan, Inc. (AGX) shows solid improvement this week. The company’s rating rises from a C to a B. Argan, Inc. plans, builds, manages and leases warehouses. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of AGX stock.

This week, AECOM’s (ACM) ratings are up from a C last week to a B. AECOM provides government and commercial clients with technical and management support services. The company also gets A’s in earnings momentum and free cash flow. For more information, get Portfolio Grader’s complete analysis of ACM 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.