American billionaire hedge fund manager Bill Ackman is delisting his investment company Pershing Square Holdings from the Amsterdam stock exchange, citing the violence against Israeli football supporters in the capital last November.

The last day of trading in Amsterdam will be January 30, Euronext said in a statement.

Ackman said in November he wanted to concentrate Pershing stock in one location and it will continue to be traded in London.

“The board had been considering the move because our second listing on the @LSEplc now represents more than 90% of our trading. Events in Amsterdam during the last 24 hours provide an appropriate tipping point for this conclusion,” Ackman said on social media.

He also said he had “begun the conversation” with Universal Music Group, which is domiciled in Amsterdam as well as listed there, about moving to the United States.

However, a day later, UMG said in a statement that “Pershing does not have any right to require UMG to become a US domiciled company or delist from Euronext Amsterdam,” Reuters reported at the time.

Ackman, a former Democrat who endorsed Donald Trump at the last US presidential election, has repeatedly expressed his support for Israel in its war with Hamas.