X0508 4 2025-10-01 1 0001671584 Aptevo Therapeutics Inc. APVO 0000070858 BANK OF AMERICA CORP /DE/ BANK OF AMERICA CORPORATE CENTER 100 N TRYON ST CHARLOTTE NC 28255 0 0 1 0 0001102113 BANK OF AMERICA NA 100 NORTH TRYON STREET CHARLOTTE NC 28255 0 0 1 0 0001675365 BOFA SECURITIES, INC. 150 N COLLEGE ST NC1-028-28-04 CHARLOTTE NC 28255 0 0 1 0 0 This statement is jointly filed by Bank of America Corporation ("Bank of America"), Bank of America N.A. ("BANA"), and BofA Securities, Inc. ("BOFAS"). Bank of America, BANA and BOFAS are submitting this form to indicate they are no longer subject to Section 16 as their beneficial ownership has decreased below 10 percent. /s/ Andres Ortiz, Authorized Signatory for Bank of America Corporation 2025-10-03 /s/ Andres Ortiz, Authorized Signatory for Bank of America N.A 2025-10-03 /s/ Andres Ortiz, Authorized Signatory for BofA Securities, Inc. 2025-10-03