Best Large Workplaces in Biotechnology and Pharmaceuticals

To determine the Best Workplaces in Biotechnology and Pharmaceuticals in 2025, Fortune partnered with global people analytics firm Great Place to Work to analyze survey feedback representing more than 40,000 U.S. employees. See also: the Best Small and Medium Workplaces in Biotechnology & Pharmaceuticals.

The Top Ten

AbbVie

Prev. #1

Employees say: "AbbVie allows employees to dedicate work time to volunteering, and also to involvement in employee resource groups, both of which provide opportunities to develop professional and leadership skills we might not have the opportunity to develop in our formal work roles, as well as to develop meaningful relationships with our colleagues. Many times, this translates directly to more cooperative and productive work relationships, because cross-functional colleagues have the opportunity to get to know one another on a personal level and in the context of doing service for others, and this makes our professional teams stronger."

Vertex Pharmaceuticals

+1 spotPrev. #3

Employees say: "The Vertex 101 and other scientific and commercial learning series is awesome! The 'leading edge' is also a great connection point for the average employee that is appreciated and 'humanizes' the C-Suite. Finally, the continued learning series that provides development in management and job skills is one of a kind and shows the investment Vertex makes for its employees as workers and people in general."

Merck

-1 spotPrev. #2

Employees say: "Senior leadership at Merck is committed to establishing a healthy work environment, and many mid-level managers set a positive example. I believe most Merck employees genuinely strive to make a meaningful impact, both within the work environment and in patient care. A good example is the various mentorship programs I have attended. Despite mentoring me being outside of their job responsibilities and not accounted for in their annual performance reviews, all my mentors have done their best to support me and provide constructive feedback."

United Therapeutics

+1 spotPrev. #5

Employees say: "What makes this company a great place to work, in my experience, is the combination of independence and a truly positive work environment. I have the freedom to lead my projects and take ownership of them, which allows me to bring my own ideas and problem-solving approach to the table. Additionally, the company culture actively reinforces positivity—I regularly receive encouragement and appreciation for the work I do, which strengthens my motivation and commitment to give my best every day. That combination of autonomy and recognition really sets this workplace apart for me."

Alnylam Pharmaceuticals

-1 spotPrev. #4

Employees say: "We truly live our values, at every level in the organization. I have personally seen members of the executive team spend time with employees to give them medical advice for their personal or family situations—to help break down complex medical diagnoses and recommend physicians."