Mid-market private equity firm Quadrivio Group has acquired a majority stake in Italy-based rotational moulding business Rototech. Unquote understands that the deal values the company at €30m, which equates to 5.5x its 2018 EBITDA of €5.5m. Quadrivio bought a 60% stake in the company from the founding Accornero family, who reinvested alongside the GP and…