The company had already laid off staff in its bars division ahead of the furlough scheme ending, with all management and staff taking pay cuts during the first lockdown.
It said that the latest four-week lockdown was "not unexpected" and that its impact "in all three divisions will be mitigated to a large degree by the extension of the furlough scheme to the end of November".
Brighton Pier chief executive Anne Ackord said "the group is well placed to resume normal trading at the earliest opportunity."
The company will not issue a dividend for the 2019 financial year.