This week, 5 Aerospace & Defense stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, L-3 Communications Holdings, Inc. (LLL) pushes up from a B to a A rating. L-3 Communications Holdings, Inc. is a provider of intelligence, surveillance and reconnaissance systems and aircraft modernization and maintenance services. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of LLL stock.

The rating of United Technologies Corporation (UTX) moves up this week, rising from a C to a B. United Technologies Corporation provides technology products and services to building systems and aerospace industries. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of UTX stock.

Vectrus Inc (VEC) improves from a B to a A rating this week. The company also gets A’s in operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of VEC stock.

AeroVironment, Inc. (AVAV) is seeing ratings go up from a C last week to a B this week. AeroVironment, Inc. designs, tests, and manufactures diversified technological products, including small, unmanned, remote-control military aircraft and rapid battery-charging stations. The company also gets A’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of AVAV stock.

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