SCHEDULE 13D/A 0000895345-24-000127 0001409888 XXXXXXXX LIVE 18 Class A Common Stock, $0.01 par value per share 09/12/2025 false 0001784254 58450D104 MediaCo Holding Inc.

767 Fifth Avenue 12th Floor New York NY 10153

Standard General L.P. 212-257-4701 767 5th Ave 12th Fl, Attn: Joseph Mause New York NY 10153 0001409888 Standard General L.P. AF DE 0 40839597 0 40839597 40839597 N 49.88 IA (1) See Item 5. 0001418202 Kim Soohyung AF X1 0 40839597 0 40839597 40839597 N 49.88 IN HC (1) See Item 5. Class A Common Stock, $0.01 par value per share MediaCo Holding Inc. 767 Fifth Avenue 12th Floor New York NY 10153 This Amendment No.18 to Schedule 13D (the "Amendment") relates to Class A Common Stock ("Class A Common Stock") of MediaCo Holding Inc., an Indiana corporation (the "Issuer" or the "Company"). This Amendment is being filed to amend the Schedule 13D that was originally filed on January 28, 2020, as amended on February 5, 2020, March 30, 2020, April 24, 2020, May 22, 2020, September 2, 2020, September 23, 2020, May 21, 2021, November 29, 2021, December 21, 2021, January 10, 2022, March 24, 2022, June 30, 2022, July 29, 2022, December 30, 2022, August 11, 2023, April 4, 2024, and April 22, 2024 (as amended, the "Schedule 13D"). Unless otherwise indicated in this Amendment, all capitalized terms have the meanings indicated to them in the Schedule 13D. This Amendment is being filed to amend and supplement Item 5 of the Schedule 13D. See Items 7-13 of the cover pages and Item 2 above. See Items 7-13 of the cover pages and Item 2 above. On September 12, 2025, a private investment vehicle management by Standard General L.P. distributed 2,105,596 shares of the Issuer's Class A Common Stock in accordance with the terms of the investment vehicle for no consideration. Other than such grant and distribution, the Reporting Persons did not effect any transactions in shares of the Issuer's Class A Common Stock during the sixty day period prior to the filing of this Amendment. The percentages reported herein are based on a statement in (i) the Issuer's Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission (the "SEC") on August 11, 2025, that there were 48,264,309 shares of the Issuer's Class A Common Stock outstanding and 5,413,197 shares of the Issuer's Class B Common Stock, which are convertible into the Issuer's Class A Common Stock, outstanding, each as of August 1, 2025, and (ii) the Issuer's Current Report on Form 8-K, filed with the SEC on September 12, 2025, that 28,205,938 shares of the Issuer's Class A Common Stock were issued on September 8, 2025. Not applicable. Not applicable. Standard General L.P. /s/ Joseph Mause 09/12/2025 Kim Soohyung /s/ Kim Soohyung 09/12/2025