"Yes, we are open to it," he said only a few weeks before the first anniversary of the $2.5 billion (1.5 billion pound) London float of Essar Energy.
"Last year, when we looked at doing this, it was very much focused on doing it as a single experience... but we have been very happy over the past year. We have other businesses, which are listed in Bombay – the shipping business for example. I'm sure we will look," he said.
He said nothing was imminent and that no final decisions would be taken until next year. Essar Ports have an annual capacity of 76 million tonnes and handles 40 million tonne of cargo a year, mainly crude oil and iron ore.
It is already India's second-largest privately owned ports group in terms of volumes but is on track to double capacity to 158 million tonne in the next two years. The group is investing $1.1 billion to acquire 12 new vessels and jack up rigs for its shipping operation.
Separately, Ruia said Essar Energy, the FTSE 100 listed company in which the Ruias retain nearly 77 per cent, was examining acquisitions to bolster its access to oil and coal for the Indian market.
"We are looking at international resources in coal, oil and gas in Africa, Indonesia and Australia. "With revenues of $15 billion last year, Essar has interests in businesses from ports and shipping to outsourcing."
He said other divisions could also be considered for a London listing, although he declined to comment on the specifics.