THL Partners Acquires Headlands Research from KKR
August 16, 2025
THL Partners entered into a definitive agreement to acquire Headlands Research, a multinational network of clinical trial sites, from funds managed by KKR. The deal is intended to accelerate Headlands’ clinical trial site expansion and enhance its technology and centralized infrastructure for pharmaceutical and biotech sponsors.
- Buyers
- THL Partners
- Targets
- Headlands Research
- Sellers
- Funds managed by KKR
- Industry
- Healthcare Services
- Location
- Florida, United States
- Transaction Type
- Buyout
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Headlands Research Acquires Summit Research Network
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Headlands Research, a KKR-backed clinical research site organization based in San Francisco, has acquired Summit Research Network in Portland, Oregon, expanding Headlands' site footprint and expertise in neurology, psychiatry and memory-health research. The deal grows Headlands' global network to 15 clinical trial sites and accompanies the launch of a fourth Horizons site in Scottsdale, Arizona.
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Headlands Research Acquires Clinical Research Professionals (St. Louis)
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Headlands Research has acquired Clinical Research Professionals, a St. Louis–area clinical research site, expanding Headlands' network and geographic reach. The acquisition adds experienced investigators and capabilities across therapeutic areas including gastroenterology, neurology, and vaccines, supporting increased participant recruitment and trial capacity.
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Headlands Research Acquires Pharmasite Research
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Headlands Research, a multinational network of clinical trial sites, has acquired Pharmasite Research, a Maryland-based clinical trial site focused on mental illness and central nervous system (CNS) disorders. The deal expands Headlands' therapeutic capabilities in mental health and extends its site network's reach in the Mid-Atlantic, bringing the network to 18 sites across the United States and Canada.
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Headlands Research Acquires Trial Management Associates
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Headlands Research has acquired Trial Management Associates (TMA), a multi-site clinical research company with locations in Wilmington, North Carolina and Myrtle Beach, South Carolina. The deal expands Headlands Research's network to 21 sites across the United States and Canada and strengthens its southeastern U.S. footprint and clinical capabilities.
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Headlands Research Acquires Peninsula Research Associates
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Headlands Research Acquires Eastern Massachusetts Clinical Research Site
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Headlands Research acquired an established clinical research site now operating as Headlands Research Eastern Massachusetts. The site — led by neurologist Dr. Donald Marks and specializing in neurodegenerative diseases such as Alzheimer’s and Parkinson’s — broadens Headlands’ neurology research capabilities and expands its clinical trial site network in Eastern Massachusetts.
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