NEWTOWN, Pa., Sept. 11, 2024 /PRNewswire/ — Edelson Lechtzin LLP, a leading class action law firm, is investigating securities fraud claims on behalf of all investors of Agenus, Inc. (“Agenus”) (NASDAQ: AGEN) between January 23, 2023, and July 17, 2024, inclusive (the “Class Period”)….