Glanbia shares plunge by over 18% as threat of tariffs cloud future outlook

The food giant posted increased revenues of $3.8bn, underpinned by double-digit sales growth in its sports nutrition brands Optimum Nutrition

Glanbia CEO Hugh McGuire

Shares in Glanbia took its largest plunge since 2007 as the food group warned that a global tariff war could impact its ability to source raw materials and deliver products. 

Concerns over rising costs at the food nutrition company saw its stock sink by more than 18% in Dublin trading on Wednesday morning, more than wiping out its gains for this year.