Berkshire Partners has made a $125 million growth capital investment in United Biosource.
The company provides various services that help biotech companies better market and develop products, such as developing software to improve the efficiency and integrity of clinical trials, according to its website.
It was established in 2003 with $153 million from investors including Whitney & Co., Oak Investment Partners and Grotech Capital Group.
Headquartered in Maryland, it now employs 1,200 people in 20 countries.
Berkshire is investing from its seventh fund, closed on $3.1 billion in 2006. Its most recent deal was the add-on acquisition of US chain Eyeglass World to its Vision Care Holdings portfolio company. No financial details were disclosed.