The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query MDIA owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MDIA"
Use Arkolith to show who owns MDIA, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $23.2M | 35.3M | —Held | Q1 2026 | |
| 2 | JPMORGAN CHASE & CO | $255K | 383K | ▼−71% Reduced · −949K sh | Q1 2026 | |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | $76K | 115K | ▲+0.4% Added · +506 sh | Q1 2026 | |
| 4 | MILLENNIUM MANAGEMENT LLC | $59K | 89K | ▼−16% Reduced · −17K sh | Q1 2026 | |
| 5 | VANGUARD GROUP INC | $48K | 84K | —Held | Q4 2025 | |
| 6 | UBS Group AG | $36K | 55K | ▲+3.0% Added · +2K sh | Q1 2026 | |
| 7 | VANGUARD FIDUCIARY TRUST CO | $32K | 49K | ▲New +49K sh | Q1 2026 | |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | $21K | 33K | ▲New +33K sh | Q1 2026 | |
| 9 | STATE STREET CORP | $11K | 17K | —Held | Q1 2026 | |
| 10 | NORTHERN TRUST CORP | $9K | 14K | —Held | Q1 2026 | |
| 11 | Tower Research Capital LLC (TRC) | $3K | 5K | ▲+11% Added · +520 sh | Q1 2026 | |
| 12 | MORGAN STANLEY | $134 | 203 | ▲68× Added · +200 sh | Q1 2026 | |
| 13 | Allworth Financial LP | $22 | 32 | —Held | Q1 2026 | |
| 14 | HARBOUR INVESTMENTS, INC. | $13 | 19 | —Held | Q1 2026 | |
| 15 | CITIGROUP INC | $1 | 1 | ▲New +1 sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Sep 12, 2025 | Kim Soohyung | 10% Owner | Other (J) | 2.1M | $0 |
| Sep 5, 2025 | BlackRock Portfolio Management LLC | 10% Owner | Option exercise (X) | 28.2M | $0 |
| Sep 5, 2025 | BlackRock Portfolio Management LLC | 10% Owner | Option exercise (X) | 28.2M | — |
| Sep 5, 2025 | BlackRock Portfolio Management LLC | 10% Owner | Sell (S) | 214 | $282 |
| May 1, 2025 | Kapnick Scott | 10% Owner | Option exercise (M) | 7.1M | — |
| May 1, 2025 | Kapnick Scott | 10% Owner | Option exercise (M) | 7.1M | — |
| Jul 15, 2024 | Sogadzi Kudjo Joachen | Chief Operating Officer | Tax withholding (F) | 16K | $57K |
| May 22, 2024 | EMMIS CORP | Director, 10% Owner | Sell (S) | 11K | $13K |
| May 21, 2024 | EMMIS CORP | Director, 10% Owner | Sell (S) | 40K | $50K |
| May 17, 2024 | EMMIS CORP | Director, 10% Owner | Sell (S) | 5K | $7K |
| Apr 16, 2024 | Kim Soohyung | Director, 10% Owner | Grant (A) | 20.7M | $29.6M |
| Apr 16, 2024 | Kim Soohyung | Director, 10% Owner | Disposed to issuer (D) | 286K | — |
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MDIA. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.