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Exhibit 21.1

SELLAS Life Sciences Group, Inc.

The following is a list of subsidiaries of the Company as of December 31, 2023.

SUBSIDIARY						STATE OF INCORPORATION OR OTHER
(Name under which subsidiary does business)						JURISDICTION OF ORGANIZATION
Sellas Life Sciences Limited						Ireland
Sellas Life Sciences Group Ltd.						Bermuda
SLSG Limited LLC						Delaware
Apthera, Inc.						Delaware