An affiliated European fund of The Riverside Company, a lower middle market-focused global private investor, has agreed to invest in GFOS Group, a German software provider for workforce management, access control and manufacturing execution systems.

SFW Capital Partners, a New York-based private equity firm focused on the industrial and life sciences technology sectors, has sold US materials science producer Micromeritics Instrument Corporation to Spectris for $630m.

Connecticut-based private equity firm Olympus Partners has sold Soliant Health, an education and healthcare staffing company, to private investment firm The Vistria Group for approximately $2.5bn, less than five years after acquiring the business for $612m, according to a report by CT Insider.

US middle-market private equity firm Thomas H Lee Partners has made a majority investment in YA GROUP, an international professional services organisation providing consulting, engineering, risk mitigation and related services.

Global private investment firm Carlyle Group is to acquire Worldpac, the wholesale distribution business of North American automotive aftermarket parts provider, Advance Auto Parts, in an all-cash $1.5bn deal, which is expected to complete by the end of the year.

UK regional private equity firm NorthEdge has completed the sale of Cutwel, a cutting tool distributor to the SME precision engineering sector in the UK and Ireland, to Inflexion Private Equity Partners.

Charlotte-based middle-market private equity firm Falfurrias Management Partners has made an investment in clinical trials solution company Jumo Health.

Private capital asset manager Pollen Street Capital has agreed to acquire European SaaS provider Keylane Group from Waterland Private Equity.