DS Smith shares jump as bidding war looms

International Paper of the US has emerged as a challenger to Mondi
DS Smith is Britain’s leading cardboard packaging company, making boxes for  companies such as Amazon
DS Smith is Britain’s leading cardboard packaging company, making boxes for companies such as Amazon
CHRIS RATCLIFFE/BLOOMBERG/GETTY

The prospect of a bidding war for Britain’s champion cardboard box manufacturer lifted shares in DS Smith to a two-year high.

Following confirmation that International Paper of the US had put in a counteroffer, DS Smith stock closed up 36¾p, or 10.2 per cent, at 396½p on Wednesday, valuing the company at £5.5 billion.

The shares have risen by 26.5 per cent since the start of the year and after it emerged that it was being stalked by Mondi, a rival paper and packaging firm.

This month DS Smith agreed a £10.5 billion, 54-46 all-paper merger with Mondi, a larger packaging powerhouse that was spun out from the ­Anglo-American mining empire.

The level of DS Smith’s share price at the close on Wednesday is