The private equity firm created ViraCor in 2009 by merging two independent labs in Kansas City before adding on two more businesses through bolt-on deals.
VIBT provides highly-specialized, complex diagnostic tests available for infectious disease, immunology and allergy complications.
Mid-market focused Ampersand targets growth equity investments in the healthcare sector, and has managed $1bn in private equity partnerships.
In April it emerged that Ampersand had raised more than $100m towards its latest fund.
Ampersand has raised seven funds over the past 20 years, producing a 24 per cent pooled IRR.
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