The two law firms seeking to build cases on behalf of Credit Suisse bondholders following the takeover of the Swiss investment bank could end up working collaboratively, the head of one of the firms has said.

Both firms held calls for bondholders on Wednesday to discuss litigation strategies. A total of 760 people attended Quinn Emanuel Urquhart & Sullivan’s call and the firm received confirmation from multiple holders that they want to participate in its group, according to a person close to the situation.