BIOTECHNOLOGY - 225 companies

Biotechnology is a popular term for the generic technology of the 21st century. Although it has been utilized for centuries in traditional production processes, modern biotechnology is only 50 years old and in the last decades it has been witnessing tremendous developments. Bioengineering is the science upon which all Biotechnological applications are based. With the development of new approaches and modern techniques, traditional biotechnology industries are also acquiring new horizons enabling them to improve the quality of their products and increase the productivity of their systems.

DIAGNOSTIC SUBSTANCES - 54 companies

DRUGS - 152 companies

In pharmacology, Dictionary.com defines a drug as "a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being." Drugs may be prescribed for a limited duration, or on a regular basis for chronic disorders.

HEALTHCARE SERVICES - 273 companies

Stocks in the healthcare sector are often considered to be defensive because the products and services are essential. Even during economic downturns, people will still require medical aid and medicine to overcome illness. Having a consistent demand for goods and services makes this sector less sensitive to business cycle fluctuations.