Who owns MDAI (MDAI)
Which tracked institutional funds hold MDAI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MDAI 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
4 tracked funds added or opened MDAI while 2 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
MDAI’s largest tracked holder by dollar value, Q Global Advisors, LLC, sizes it at 15.8% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 15.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MDAI 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 41 tracked filers holding MDAI, 11 increased or opened the position and 13 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 MDAI 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.
New buyers 1
- VANGUARD CAPITAL MANAGEMENT LLC$1M
Full exits 2
- Hudson Bay Capital Management LP$2M
- VANGUARD GROUP INC$1M
Largest adds
- Q Global Advisors, LLC$11M
- TENOR CAPITAL MANAGEMENT Co., L.P.$7M
- JANE STREET GROUP, LLC$250K
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 |
|---|---|---|---|---|
| Q Global Advisors, LLC | 99,670 | $56M | 31.2% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 66,666 | $37M | 20.8% | 2026-Q1 |
| Highlander Partners, L.P. | 900,000 | $1M | 0.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 726,290 | $1M | 0.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 301,207 | $443K | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 221,001 | $325K | 0.2% | 2026-Q1 |
| UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO | 210,488 | $309K | 0.2% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 199,000 | $293K | 0.2% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 141,796 | $208K | 0.1% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. | 359,943 | $204K | 0.1% | 2026-Q1 |
| BlackRock, Inc. added | 122,254 | $180K | 0.1% | 2026-Q1 |
| LMR Partners LLP | 307,509 | $172K | 0.1% | 2026-Q1 |
| UBS Group AG added | 113,020 | $166K | 0.1% | 2026-Q1 |
| Clear Street Group Inc. | 285,205 | $160K | 0.1% | 2026-Q1 |
| Oasis Management Co Ltd. | 100,000 | $147K | 0.1% | 2026-Q1 |
| Rathbones Group PLC trimmed | 87,045 | $128K | 0.1% | 2026-Q1 |
| STATE STREET CORP | 75,600 | $111K | 0.1% | 2026-Q1 |
| Forum Financial Management, LP | 60,501 | $89K | 0.0% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC | 123,629 | $69K | 0.0% | 2026-Q1 |
| TORONTO DOMINION BANK | 117,931 | $66K | 0.0% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP | 100,000 | $56K | 0.0% | 2026-Q1 |
| NORTHERN TRUST CORP | 32,098 | $47K | 0.0% | 2026-Q1 |
| Caption Management, LLC | 83,537 | $47K | 0.0% | 2026-Q1 |
| Calamos Advisors LLC | 81,526 | $46K | 0.0% | 2026-Q1 |
| TPG GP A, LLC new | 74,999 | $42K | 0.0% | 2026-Q1 |
| XTX Topco Ltd trimmed | 27,088 | $40K | 0.0% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 66,666 | $37K | 0.0% | 2026-Q1 |
| Saba Capital Management, L.P. | 59,763 | $34K | 0.0% | 2026-Q1 |
| Shay Capital LLC trimmed | 14,944 | $22K | 0.0% | 2026-Q1 |
| CITIGROUP INC trimmed | 14,835 | $22K | 0.0% | 2026-Q1 |
| N.E.W. Advisory Services LLC | 14,000 | $21K | 0.0% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC | 12,800 | $19K | 0.0% | 2026-Q1 |
| Empery Asset Management, LP | 33,336 | $19K | 0.0% | 2026-Q1 |
| Philip James Wealth Mangement, LLC | 12,000 | $18K | 0.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 8,394 | $12K | 0.0% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC added | 6,489 | $10K | 0.0% | 2026-Q1 |
| OSAIC HOLDINGS, INC. trimmed | 6,480 | $10K | 0.0% | 2026-Q1 |
| FOURSIXTHREE CAPITAL LP | 11,666 | $7K | 0.0% | 2026-Q1 |
| Westside Investment Management, Inc. | 2,650 | $4K | 0.0% | 2026-Q1 |
| Farther Finance Advisors, LLC | 1,000 | $590 | 0.0% | 2026-Q1 |
| LONGFELLOW INVESTMENT MANAGEMENT CO LLC | 100 | $56 | 0.0% | 2026-Q1 |
| Clear Street Derivatives LLC | 105,049 | $74M | 41.0% | 2025-Q2 stale |
| Hudson Bay Capital Management LP new | 1,526,716 | $2M | 1.2% | 2025-Q4 stale |
| STIFEL FINANCIAL CORP | 758,584 | $2M | 1.0% | 2025-Q2 stale |
| VANGUARD GROUP INC added | 842,049 | $1M | 0.7% | 2025-Q4 stale |
| MARSHALL WACE, LLP added | 145,482 | $332K | 0.2% | 2025-Q3 stale |
| Avantax Planning Partners, Inc. | 231,336 | $266K | 0.1% | 2025-Q1 stale |
| CLEAR STREET LLC | 301,801 | $211K | 0.1% | 2025-Q2 stale |
| DNB Asset Management AS added | 136,473 | $194K | 0.1% | 2025-Q4 stale |
| BALYASNY ASSET MANAGEMENT L.P. | 190,324 | $135K | 0.1% | 2025-Q3 stale |
| Virtu Financial LLC added | 52,547 | $75K | 0.0% | 2025-Q4 stale |
| Quadrature Capital Ltd trimmed | 11,926 | $27K | 0.0% | 2025-Q3 stale |
| ANGELO GORDON & CO., L.P. new | 74,999 | $19K | 0.0% | 2025-Q1 stale |
| Tower Research Capital LLC (TRC) added | 3,949 | $6K | 0.0% | 2025-Q4 stale |
| Warberg Asset Management LLC | 20,000 | $5K | 0.0% | 2025-Q1 stale |
| TWO SIGMA SECURITIES, LLC trimmed | 13,197 | $3K | 0.0% | 2025-Q1 stale |
| Royal Bank of Canada new | 1,389 | $3K | 0.0% | 2025-Q2 stale |
| BANK OF AMERICA CORP /DE/ added | 5,941 | $3K | 0.0% | 2025-Q4 stale |
| HBW ADVISORY SERVICES LLC | 10,000 | $3K | 0.0% | 2025-Q1 stale |
| NewEdge Advisors, LLC | 1,700 | $2K | 0.0% | 2025-Q4 stale |
| FEDERATED HERMES, INC. trimmed | 451 | $1K | 0.0% | 2025-Q3 stale |
| Concord Wealth Partners new | 300 | $426 | 0.0% | 2025-Q4 stale |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC new | 100 | $115 | 0.0% | 2025-Q1 stale |
| BARCLAYS PLC new | 2 | $2 | 0.0% | 2025-Q1 stale |
| SBI Securities Co., Ltd. | 1 | $1 | 0.0% | 2025-Q4 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.