Plus500 has improved its H1 pretax profit to $58.5m, from $52.1m, at the same time hiking its interim dividend 10% to $0.2324/share.
"Plus500 achieved record first half results whilst continuing to grow both its Active and New Customers," said CEO Asaf Elimelech.
"This performance was driven by continued marketing activity and market volatility; the UK's Brexit decision boosted customer activity in late Q2 - leading to increased New Customer sign ups, customer re-activations, and customer trading levels.
"We have started the second half strongly as these New Customers deliver growth in revenues with an associated bounce back in margins.
"We are encouraged by the continuing levels of new and existing customer activity resulting from the market volatility and our own actions as we continue to invest in enhancing the business to deliver future growth.
"Overall our expectations are unchanged - momentum is expected to continue, resulting in strong growth in 2016."
Revenues totalled $158.8m, from $127.0m.