7 Life Sciences Tools & 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”).

Illumina, Inc.’s (ILMN) ratings are looking better this week, moving up to a B from last week’s C. Illumina, Inc. develops, manufactures and markets integrated systems for the large-scale analysis of genetic variation and biological function. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of ILMN stock.

Bio-Rad Laboratories, Inc. Class A (BIO) gets a higher grade this week, advancing from a C last week to a B. Bio-Rad Laboratories, Inc. Class A manufactures and supplies the life science research, healthcare, analytical chemistry and other markets with products and systems used to separate complex chemical and biological materials and to identify, analyze, and purify their components. For more information, get Portfolio Grader’s complete analysis of BIO stock.

This week, Quintiles IMS Holdings, Inc.’s (Q) ratings are up from a C last week to a B. For more information, get Portfolio Grader’s complete analysis of Q stock.

ICON Plc (ICLR) improves from a C to a B rating this week. ICON Plc provides contract clinical research services to the global pharmaceutical industry. The company also gets A’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of ICLR stock.

This is a strong week for PRA Health Sciences, Inc. (PRAH). The company’s rating climbs to A from the previous week’s B. The company also gets A’s in operating margin growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of PRAH stock.

The rating of INC Research Holdings, Inc. Class A (INCR) moves up this week, rising from a C to a B. 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 INCR stock.

NanoString Technologies, Inc. (NSTG) boosts its rating from a C to a B this week. The company also gets A’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of NSTG 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.