6 Insurance stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Aon plc (AON) earns a B this week, jumping up from last week’s grade of C. Aon plc provides risk management and human capital consulting services, including solutions to workforce productivity and insurance and reinsurance brokerage. The company also gets A’s in. For more information, get Portfolio Grader’s complete analysis of AON stock.

Heritage Insurance Holdings, Inc. (HRTG) is seeing ratings go up from a B last week to a A this week. The company also gets A’s in sales growth, operating margin growth, and earnings growth. For more information, get Portfolio Grader’s complete analysis of HRTG stock.

National General Holdings Corp (NGHC) shows solid improvement this week. The company’s rating rises from a C to a B. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of NGHC stock.

This week, Kingstone Companies, Inc. (KINS) pushes up from a B to a A rating. Kingstone Companies, Inc. offers homeowners, automobile, fire, canine legal liability, business owner, and umbrella coverages. The company also gets A’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of KINS stock.

This week, CNinsure, Inc. Sponsored ADR’s (CISG) ratings are up from a B last week to a A. CNinsure, Inc. Sponsored ADR is an independent insurance intermediary company that operates in China. The company also gets A’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of CISG stock.

The rating of Atlantic American Corporation (AAME) moves up this week, rising from a C to a B. Atlantic American Corporation provides life, health, property, and casualty insurance products in the United States. The company also gets A’s in earnings growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of AAME 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.