The grades of 5 Aerospace & Defense 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.

TransDigm Group Incorporated (TDG) boosts its rating from a B to a A this week. TransDigm Group Incorporated is a global designer, producer and supplier of highly engineered aircraft components for use on nearly all commercial and military aircraft in service today. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of TDG stock.

HEICO Corporation (HEI) gets a higher grade this week, advancing from a B last week to a A. HEICO Corporation designs, manufactures, and sells aerospace products and services. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of HEI stock.

This is a strong week for Mercury Systems, Inc. (MRCY). The company’s rating climbs to A from the previous week’s B. Mercury Systems, Inc. designs, manufactures, and markets real-time digital signal processing computer systems. The company also gets A’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of MRCY stock.

The rating of DigitalGlobe, Inc. (DGI) moves up this week, rising from a B to a A. DigitalGlobe, Inc. provides commercial earth imagery products and information services worldwide. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of DGI stock.

Innovative Solutions and Support, Inc. (ISSC) improves from a C to a B rating this week. Innovative Solutions and Support, Inc. designs, manufactures, and sells flight information computers, electronic displays, and advanced monitoring systems to the military and government, commercial air transport, and corporate aviation markets. The company also gets A’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of ISSC 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.