In the context of the input sentence, determine the relationship between 'Euronext Amsterdam' and 'Euronext'.
Options: headquarters location, operator, creator, product/material produced

Euronext had just one new large capitalisation listing in the month of August 2015 (as opposed to seven in July 2015), Altice on Euronext Amsterdam with a market capitalisation at listing of €21.9 billion.
operator