Goldman Sachs has made it compulsory for its staff to be fully vaccinated against coronavirus in order to work in its US offices.
The investment bank said from 7 September all employees, along with clients and visitors, would need to be doubled jabbed to enter its buildings.
Workers who are not fully vaccinated will be expected to work from home.
Goldman told the BBC the policy was being introduced in the US, where workers returned the office in July, and not at its sites around world.
Proof of vaccination status will be required via an app from October, it added.
The bank had previously ordered its US bankers to disclose their vaccine status before returning to the office but refrained from mandating them.
The announcement comes after Pfizer’s two-dose vaccine received full approval from the US Food and Drug Administration (FDA). The vaccine had initially only been given emergency use authorisation.
The approval is expected to set off more vaccine mandates by employers and organisations in the US at a time when infections are rising and vaccine hesitancy remains high.