3 IT Services 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, Heartland Payment Systems, Inc.’s (HPY) ratings are up from a B last week to a A. Heartland Payment Systems, Inc. provides bank card-based payment processing services to small-and medium-sized merchants in the United States. The company also gets A’s in earnings momentum and return on equity. For more information, get Portfolio Grader’s complete analysis of HPY stock.

Leidos Holdings, Inc. (LDOS) boosts its rating from a B to a A this week. The company also gets A’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of LDOS stock.

Interxion Holding N.V.’s (INXN) ratings are looking better this week, moving up to a B from last week’s C. Interxion Holding N.V. provides colocation services, equipment housing, connectivity services, managed services, and performance management. The company also gets A’s in operating margin growth, earnings growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of INXN 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.