PharmaBioSource is a global life sciences consultancy firm, supporting transformative transactions that create long term value for life science companies and investors.

For more than 20 years, our multidisciplinary team of scientists, engineers, manufacturing experts and pharmaceutical business leaders has been facilitating life-changing transactions within Pharma, BioPharma and BioTech.

What sets us apart is our ability to recognize and interpret opportunities with a level of foresight only years spent working within the life sciences industry can afford. Our expert consultants have enormous firsthand experience, specializing in life sciences facilities, company and product transactions. Offering real-time sector insights and creative strategic solutions, we help our clients make smart decisions to improve the way they do business — and this vital industry as a whole.

PharmaBioSource combines an innovative spirit with a data-driven approach to create forward-thinking solutions that give our clients the financial and market resilience to realize their full potential. From identifying growth, investment and M&A opportunities, to comprehensive risk analysis and diligence, our commitment is to exceed expectations in every transaction decision and ensure our clients land safely, without fail.

PharmaBioSource supports clients with end-to-end programs, or fill gaps in expertise or simply lighten your workload, so you’re free to focus on what you do best.

“PharmaBioSource is the firm we use when we want high value life science opportunities that only few know.”

– Senior Partner, North American Life Science Private Equity Firm

Trusted Partners

For more than two decades, we have guided leading global biopharmaceutical companies, service providers, and investors with actionable intelligence, innovative strategies, and solutions to transact on life science businesses, pharmaceutical facilities, and therapeutic assets worldwide.


Our People

Our global team of experts has firsthand experience in every pocket of Pharma, BioPharma and BioTech. We are scientists, engineers, manufacturing experts and business leaders with a mission to help life sciences companies thrive.

Our Story

PharmaBioSource was born when our founder and CEO, William (Bill) Wiederseim was helping sell a pharmaceutical plant for a multinational Pharma company. When the client expressed how much quicker and more efficient this divestment and transaction could be, were there a single company who understood the engineering and manufacturing of the drug, but could also manage the financials and accounting, Bill got an idea. He went out and put together a team of Pharma industry executives, engineers with biopharma buildings experience, scientists and finance people with industry experience. Bringing them all together, he launched PharmaBioSource, a specialized single entity that could spearhead biopharma transactions from conception to close.

From those humble beginnings over 20 years ago, we have grown to a multinational team with a presence on three continents, over 100+ transactions in therapeutic assets and pharmaceutical facilities with a value of over US $4 Billion. PharmaBioSource was created to solve a problem, and that is still our expertise today.