Ampersand Capital Acquires Willow Laboratories

Willow Laboratories, based in Lynn, Mass., has been acquired by Ampersand Capital Partners. Willow is a clinical and forensic toxicology laboratory that provides urine, hair, and saliva testing services to a wide range of healthcare providers, including treatment centers. Ampersand is a Boston-based, middle market private equity firm. Terms of the deal were not disclosed.

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