This week, 4 Software stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Proofpoint, Inc. (PFPT) boosts its rating from a C to a B this week. Proofpoint, Inc. provides threat protection, regulatory compliance, archiving and governance, and secure communication solutions worldwide. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of PFPT stock.

Park City Group, Inc. (PCYG) is seeing ratings go up from a C last week to a B this week. Park City Group, Inc. provides software and consulting services for business productivity. For more information, get Portfolio Grader’s complete analysis of PCYG stock.

This is a strong week for Sapiens International Corp. NV (SPNS). The company’s rating climbs to B from the previous week’s C. Sapiens International Corp. NV is a global provider of information technology solutions. For more information, get Portfolio Grader’s complete analysis of SPNS stock.

This week, Finjan Holdings, Inc.’s (FNJN) ratings are up from a C last week to a B. The company also gets A’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of FNJN 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.