Mining contractor Thiess has snapped up almost 16 per cent of the MACA group after lifting its cash takeover offer and securing the support of the West Australian company’s founding shareholders.

Thiess, which is half-owned by construction group Cimic, said on Monday it had raised its takeover bid to $1.075 a share from $1.025 a share, valuing the Perth-based contractor at $367.3 million.