Keystone Capital Forms Gillson Sciences via Acquisition of Azzur Labs and Micro Measurement Laboratories

SGS Acquires Keystone Bioanalytical

May 4, 2026

Healthcare Services

SGS has acquired Keystone Bioanalytical, a Philadelphia-based provider of bioanalytical testing services, to strengthen its end-to-end drug development lifecycle capabilities. The acquisition expands SGS’s GLP-compliant, bioanalysis-focused capacity for North American pharma and biotech clients, including LC-MS/MS method development, validation, and analysis.

Gillson Sciences Acquires SanAir Technologies Laboratory

January 21, 2026

Environmental Services

Gillson Sciences, a Chicago-based laboratory testing and scientific solutions provider and portfolio company of Keystone Capital Management, has acquired SanAir Technologies Laboratory, an accredited environmental and industrial hygiene testing laboratory headquartered in Richmond, Virginia. The add-on expands Gillson's capabilities into environmental testing (air, asbestos, Legionella, lead/metals, industrial hygiene) and broadens its service offering across environmental and industrial end markets.

Inverness Graham Acquires Azer Scientific and Combines It with Electron Microscopy Sciences

August 17, 2023

Medical Devices

Inverness Graham, a Philadelphia-based private equity firm, has acquired Azer Scientific, a Morgantown, Pennsylvania provider of laboratory consumables and equipment. Azer will be combined with Inverness Graham portfolio company Electron Microscopy Sciences (EMS) to create a scaled life sciences and clinical diagnostics platform; terms were not disclosed.

Azelis Acquires Gillco Ingredients

May 16, 2023

Food & Beverage

Azelis has signed an agreement to acquire 100% of Gillco Ingredients, a US-based specialty ingredient provider serving the food & nutrition market. The acquisition expands Azelis' footprint in the US life sciences and food & nutrition sectors and brings Gillco's ~40 employees and application expertise into Azelis' global network.

Millstone Medical Outsourcing Acquires MycoScience

November 14, 2022

Healthcare Services

Millstone Medical Outsourcing, an Arlington Capital Partners portfolio company, has completed the acquisition of MycoScience, a Willington, Connecticut-based provider of medical device and pharmaceutical laboratory and environmental testing services. The acquisition adds advanced laboratory and regulatory testing capabilities to Millstone's post-manufacturing and aftermarket services, enabling more in-house testing, faster time to market, and expanded end-to-end offerings.

Sotera Health Acquires Gibraltar Laboratories

September 1, 2018

Healthcare Services

Sotera Health LLC, a PE-backed global provider of sterilization and laboratory services, has acquired Gibraltar Laboratories, a family-owned contract microbiology and analytical chemistry testing firm based in Fairfield, New Jersey. The acquisition — advised by Capstone Partners — expands Sotera/Nelson Labs' testing capabilities and geographic presence in the pharma and medical device markets.