A major test of the UK's religious discrimination laws next week could see a record compensation payout, according to reports.
The French nationals claim bosses at the company took Jewish clients from them, and gave them to non-Muslim colleagues.
They are said to be seeking damages that could run into millions of pounds for religious and racial discrimination, among other claims.
They are said to have been on total pay in excess of £100,000 per year each. The case at the Central London Employment Tribunal is expected to begin on Monday, and is scheduled to last 55 days.
Tradition Securities and Futures denies the charges.