0001671584 2026-08-21 2026-08-21 0001671584 1 2026-08-21 2026-08-21 iso4217:USD pure shares S-1 S-1 EX-FILING FEES 0001671584 Aptevo Therapeutics Inc. N/A N/A S-1 Aptevo Therapeutics Inc. false Equity Common Stock, par value $0.001 per share true 6444858 2.79 17981153.82 0.0001381 2483.20 17981153.82 2483.20 0.00 0.00 2483.20 Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act of 1933, as amended (the "Securities Act"), based on the average of the high and low prices of the shares of the registrant's common stock on the Nasdaq Capital Market on August 18, 2026 (such date being within five business days of the date that this registration statement was first filed with the Securities and Exchange Commission, in accordance with Rule 457(c) of the Securities Act).