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.

Guardian Restoration Partners, a home restoration platform backed by US private equity firm Alpine Investors, has acquired two restoration services businesses, Quick Dry Restoration and Spartan Emergency Water Removal, bringing the platform’s total acquisitions to five since its launch in April.

Connecticut-based lower middle-market private equity firm Atlantic Street Capital has completed the sale of All Star Auto Parts, an alternative automotive parts distributor, to BBB Industries, a manufacturer for the automotive and industrial markets.

Ranger Fire and Security, a fire and security group launched by mid-market private equity firm Hyperion Equity Partners in February, has partnered with Simpro, a field service management software provider for trade and field services businesses.

BV Investment Partners, a private equity firm focused on tech-enabled business services, software and IT services industries, has invested in Kami, a classroom content provider, which values the business at over $175m.