Who owns MDIA (MDIA)
Which tracked institutional funds hold MDIA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MDIA company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
2 tracked funds added or opened MDIA while 1 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
MDIA’s largest tracked holder by dollar value, Standard General L.P., sizes it at 6.9% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 6.9pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MDIA divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 17 tracked filers holding MDIA, 8 increased or opened the position and 4 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in MDIA between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
Largest adds
- Standard General L.P.$3M
- BlackRock, Inc.$3M
Largest trims
- JPMORGAN CHASE & CO$518K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Standard General L.P. | 35,426,400 | $23M | 42.5% | 2026-Q1 |
| BlackRock, Inc. | 35,284,678 | $23M | 42.4% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 383,403 | $255K | 0.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 115,265 | $76K | 0.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 89,276 | $59K | 0.1% | 2026-Q1 |
| UBS Group AG added | 54,970 | $36K | 0.1% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 49,246 | $32K | 0.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 32,591 | $21K | 0.0% | 2026-Q1 |
| STATE STREET CORP | 16,659 | $11K | 0.0% | 2026-Q1 |
| NORTHERN TRUST CORP | 13,854 | $9K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 5,183 | $3K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 1,726 | $1K | 0.0% | 2026-Q1 |
| MORGAN STANLEY added | 203 | $134 | 0.0% | 2026-Q1 |
| Allworth Financial LP | 32 | $22 | 0.0% | 2026-Q1 |
| HARBOUR INVESTMENTS, INC. | 19 | $13 | 0.0% | 2026-Q1 |
| CITIGROUP INC trimmed | 1 | $1 | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN | 0 | — | 0.0% | 2026-Q1 |
| HPS Investment Partners, LLC new | 7,051,538 | $8M | 14.0% | 2025-Q2 stale |
| VANGUARD GROUP INC | 83,563 | $48K | 0.1% | 2025-Q4 stale |
| CITADEL ADVISORS LLC trimmed | 32,354 | $41K | 0.1% | 2025-Q3 stale |
| BANK OF AMERICA CORP /DE/ added | 132 | $77 | 0.0% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 13 | $14 | 0.0% | 2025-Q2 stale |
| US BANCORP \DE\ | 10 | $11 | 0.0% | 2025-Q1 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.