Saudi state petchems conglomerate Sabic boosted total production by 5.9% last year to a record 75.3mn tons, but its biggest output increases came in its metals subsidiary and in fertilizers.

While Sabic has been working to streamline all of its operations over the last three years, its metal and fertilizers businesses may both come under closer scrutiny following the planned takeover of the company by state-owned integrated petroleum firm Saudi Aramco. Whilst Aramco views Sabic’s core...