This week, these five stocks have the best ratings in Operating Margin, one of the eight Fundamental Categories on Portfolio Grader.

Ocean Rig UDW Inc (ORIG) engages in the provision of oilfields services. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of ORIG stock.

Eagle Materials Inc. (EXP) is a diversified producer of basic building materials and construction products used in residential, industrial, commercial and infrastructure construction. The company also gets A’s in operating margin growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of EXP stock.

Shutterstock, Inc.. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SSTK stock.

KNOT Offshore Partners LP. The company also gets A’s in operating margin growth, earnings growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of KNOP stock.

Dave & Buster’s Entertainment, Inc.. The company also gets A’s in operating margin growth, earnings growth, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of PLAY 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.