The list of 104 individuals comes from a case brought by Guardian Care Homes, which is seeking about £38M in damages from Barclays over interest rate swaps it claims it was mis-sold by the bank.
Guardian Care Homes says that the swap product it was sold was tied to Libor, which it argues was set dishonestly.
Barclays was ordered to give lawyers working for Guardian Care Homes the identities and emails of staff that it passed to regulators investigating the manipulation of the key interest rate.