3 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”).

This week, AMERISAFE, Inc.’s (AMSF) ratings are up from a B last week to a A. AMERISAFE, Inc. markets and underwrites workers’ compensation insurance. The company also gets A’s in operating margin growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of AMSF stock.

This is a strong week for Brown & Brown, Inc. (BRO). The company’s rating climbs to A from the previous week’s B. Brown & Brown, Inc. engages in the marketing and sale of insurance products and services in the United States. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of BRO stock.

Unum Group’s (UNM) ratings are looking better this week, moving up to a B from last week’s C. Unum Group is a provider of disability insurance products. The company also gets A’s in operating margin growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of UNM 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.