17 institutions reported holding $70.1M of MEDIACO HLDG INC (MDIA) in SEC 13F filings for 2026-06-30. Largest institutional holders: Standard General L.P. ($34.9M), BlackRock, Inc. ($34.8M), VANGUARD GROUP INC ($119,780), GEODE CAPITAL MANAGEMENT, LLC ($95,164), MILLENNIUM MANAGEMENT LLC ($61,277). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Standard General L.P. | $34.9M | 35.4M | Hold |
| 2 | BlackRock, Inc. | $34.8M | 35.3M | Hold |
| 3 | VANGUARD GROUP INC | $119,780 | 121,480 | Added |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | $95,164 | 96,397 | Trimmed |
| 5 | MILLENNIUM MANAGEMENT LLC | $61,277 | 62,147 | Trimmed |
| 6 | CITADEL ADVISORS LLC | $27,906 | 28,302 | New |
| 7 | NORTHERN TRUST CORP | $18,018 | 18,274 | Added |
| 8 | STATE STREET CORP | $16,426 | 16,659 | Hold |
| 9 | XTX Topco Ltd | $10,230 | 10,375 | New |
| 10 | Tower Research Capital LLC (TRC) | $6,504 | 6,596 | Added |
| 11 | Royal Bank of Canada | $1,000 | 1,000 | New |
| 12 | UBS Group AG | $228 | 231 | Trimmed |
| 13 | MORGAN STANLEY | $197 | 200 | Trimmed |
| 14 | Allworth Financial LP | $32 | 32 | Hold |
| 15 | HARBOUR INVESTMENTS, INC. | $19 | 19 | Hold |
| 16 | JPMORGAN CHASE & CO | $3 | 3 | Trimmed |
| 17 | CITIGROUP INC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30