Parexel is a leading global clinical research organisation headquartered in the United States, supporting the life sciences industry across the full drug development lifecycle. Founded in 1982, the company has grown into one of the world’s largest CROs, delivering services that help bring new therapies to market faster and more efficiently.

The company provides insights-driven clinical and consulting solutions, combining scientific, regulatory and commercial expertise to support pharmaceutical, biotechnology and medical device clients. Parexel works across all phases of clinical development (Phase I–IV), managing clinical trials, regulatory processes and post-approval activities.

Parexel operates globally with tens of thousands of employees and offices in dozens of countries, enabling the execution of complex, multi-regional clinical trials. Its model integrates clinical operations, regulatory strategy and market access expertise to streamline development pathways and improve the likelihood of successful approvals.

The company serves a broad client base ranging from emerging biotech firms to large multinational pharmaceutical companies, supporting programmes across therapeutic areas such as oncology, neuroscience, rare diseases and infectious diseases. Parexel is recognised for its strong regulatory expertise, including teams of former agency professionals and deep experience navigating global regulatory environments.

Key products and services

Clinical development services

• Phase I–IV clinical trial management
• Study design, site selection and patient recruitment
• Global clinical operations and monitoring

Regulatory and consulting services

• Regulatory strategy and submissions
• Health authority engagement (FDA, EMA and others)
• Development and approval pathway optimisation

Biometrics and data services

• Biostatistics and statistical programming
• Clinical data management and analytics
• Real-world evidence and data-driven insights

Safety and pharmacovigilance

• Drug safety monitoring and reporting
• Risk management and compliance
• Post-marketing surveillance

Market access and commercialisation support

• Pricing and reimbursement strategy
• Health economics and outcomes research (HEOR)
• Market access planning and execution

Therapeutic and specialised expertise

• Oncology, hematology and rare diseases
• Neuroscience and general medicine
• Cell and gene therapy and advanced modalities

By integrating clinical research, regulatory expertise and market access capabilities, Parexel enables life sciences companies to accelerate development timelines and bring innovative therapies to patients more efficiently. Its global scale, deep scientific expertise and insights-driven approach position the company as a strategic CRO partner for complex and large-scale drug development programmes.