As of March 23, 2026, the three largest insider holders of MDIA are Portfolio Management Llc Blackrock (TenPercentOwner, 35.26Mn shares), Group Gp, Llc Hps (TenPercentOwner, 7.05Mn shares), Bradford A Tobin (President, Coo, 198.66K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Portfolio Management Llc Blackrock | 0 | 35,257,476 | 08 Sep, 2025 | |
| Portfolio Management Llc Blackrock | 0 | 35,257,476 | 08 Sep, 2025 | |
| Group Gp, Llc Hps | 0 | 7,051,538 | 05 May, 2025 | |
| Bradford A Tobin | President, Coo | 198,657 | 0 | 10 Apr, 2023 |
| Ann C Beemish | Cfo | 137,536 | 0 | 10 Apr, 2023 |
| Rahsan Lindsay | Ceo | 124,020 | 0 | 05 Jul, 2023 |
| Andrew P. Glaze | 73,023 | 0 | 15 Aug, 2023 | |
| Mary Beth Riggio | 34,342 | 0 | 10 Aug, 2023 | |
| Robert L. Greene | 20,849 | 0 | 14 Aug, 2023 | |
| Ryan A Hornaday | Evp, Cfo Treasurer | 3,163 | 0 | 16 Aug, 2021 |
| Jeffrey H Smulyan | Ceo | 327 | 0 | 16 Jun, 2021 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 05 Sep, 2025 | Portfolio Management Llc Blackrock | Class A Common Stock | A | 28,206,152 | - | 35,257,690 | I | X |
| 05 Sep, 2025 | Portfolio Management Llc Blackrock | Class A Common Stock | A | 28,206,152 | - | 35,257,690 | I | X |
| 05 Sep, 2025 | Portfolio Management Llc Blackrock | Class A Common Stock | D | 214 | $1.32 | 35,257,476 | I | S |
| 05 Sep, 2025 | Portfolio Management Llc Blackrock | Class A Common Stock | D | 214 | $1.32 | 35,257,476 | I | S |
| 05 Sep, 2025 | Portfolio Management Llc Blackrock | Warrant (Right to buy) | D | 28,206,152 | $0.00 | 0 | I | X |
| 05 Sep, 2025 | Portfolio Management Llc Blackrock | Warrant (Right to buy) | D | 28,206,152 | $0.00 | 0 | I | X |
| 01 May, 2025 | Group Gp, Llc Hps | Class A Common Stock | A | 7,051,538 | - | 7,051,538 | I | M |
| 01 May, 2025 | Group Gp, Llc Hps | Option | D | 7,051,538 | - | 0 | I | M |
| 08 Aug, 2023 | Andrew P. Glaze | Class A Common Stock | A | 12,856 | - | 73,023 | D | A |
| 08 Aug, 2023 | Robert L. Greene | Class A Common Stock | A | 12,856 | - | 12,856 | D | A |
| 08 Aug, 2023 | Robert L. Greene | Class A Common Stock | A | 7,993 | - | 20,849 | D | A |
| 08 Aug, 2023 | Mary Beth Riggio | Class A Common Stock | A | 12,856 | - | 34,342 | D | A |
| 30 Jun, 2023 | Rahsan Lindsay | Class A Common Stock | D | 11,541 | $1.12 | 124,020 | D | F |
| 30 Mar, 2023 | Ann C Beemish | Class A Common Stock | A | 129,188 | $1.16 | 205,057 | D | A |
| 30 Mar, 2023 | Bradford A Tobin | Class A Common Stock | A | 86,125 | $1.16 | 244,010 | D | A |
| 30 Mar, 2023 | Ann C Beemish | Class A Common Stock | D | 67,521 | $1.13 | 137,536 | D | F |
| 30 Mar, 2023 | Bradford A Tobin | Class A Common Stock | D | 45,353 | $1.13 | 198,657 | D | F |
| 30 Mar, 2023 | Ann C Beemish | Class A Common Stock | A | 129,188 | $1.16 | 205,057 | D | A |
| 30 Mar, 2023 | Ann C Beemish | Class A Common Stock | D | 73,981 | $1.13 | 131,076 | D | F |
| 15 Mar, 2023 | Ann C Beemish | Class A Common Stock | D | 17,237 | $1.06 | 75,869 | D | F |