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Institutional Ownership · SEC Form 13F

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.

41
Institutional holders
5,283,126
Shares held (tracked funds)
17.2%
Of shares outstanding

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).

FundSharesReported value% of valueQuarter
Q Global Advisors, LLC99,670$56M31.2%2026-Q1
TENOR CAPITAL MANAGEMENT Co., L.P.66,666$37M20.8%2026-Q1
Highlander Partners, L.P.900,000$1M0.7%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new726,290$1M0.6%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added301,207$443K0.2%2026-Q1
JANE STREET GROUP, LLC added221,001$325K0.2%2026-Q1
UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO210,488$309K0.2%2026-Q1
BRIDGEWAY CAPITAL MANAGEMENT, LLC199,000$293K0.2%2026-Q1
VANGUARD FIDUCIARY TRUST CO new141,796$208K0.1%2026-Q1
ARISTEIA CAPITAL, L.L.C.359,943$204K0.1%2026-Q1
BlackRock, Inc. added122,254$180K0.1%2026-Q1
LMR Partners LLP307,509$172K0.1%2026-Q1
UBS Group AG added113,020$166K0.1%2026-Q1
Clear Street Group Inc.285,205$160K0.1%2026-Q1
Oasis Management Co Ltd.100,000$147K0.1%2026-Q1
Rathbones Group PLC trimmed87,045$128K0.1%2026-Q1
STATE STREET CORP75,600$111K0.1%2026-Q1
Forum Financial Management, LP60,501$89K0.0%2026-Q1
GOLDMAN SACHS GROUP INC123,629$69K0.0%2026-Q1
TORONTO DOMINION BANK117,931$66K0.0%2026-Q1
MOORE CAPITAL MANAGEMENT, LP100,000$56K0.0%2026-Q1
NORTHERN TRUST CORP32,098$47K0.0%2026-Q1
Caption Management, LLC83,537$47K0.0%2026-Q1
Calamos Advisors LLC81,526$46K0.0%2026-Q1
TPG GP A, LLC new74,999$42K0.0%2026-Q1
XTX Topco Ltd trimmed27,088$40K0.0%2026-Q1
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND66,666$37K0.0%2026-Q1
Saba Capital Management, L.P.59,763$34K0.0%2026-Q1
Shay Capital LLC trimmed14,944$22K0.0%2026-Q1
CITIGROUP INC trimmed14,835$22K0.0%2026-Q1
N.E.W. Advisory Services LLC14,000$21K0.0%2026-Q1
RAYMOND JAMES FINANCIAL INC12,800$19K0.0%2026-Q1
Empery Asset Management, LP33,336$19K0.0%2026-Q1
Philip James Wealth Mangement, LLC12,000$18K0.0%2026-Q1
MORGAN STANLEY trimmed8,394$12K0.0%2026-Q1
WOLVERINE ASSET MANAGEMENT LLC added6,489$10K0.0%2026-Q1
OSAIC HOLDINGS, INC. trimmed6,480$10K0.0%2026-Q1
FOURSIXTHREE CAPITAL LP11,666$7K0.0%2026-Q1
Westside Investment Management, Inc.2,650$4K0.0%2026-Q1
Farther Finance Advisors, LLC1,000$5900.0%2026-Q1
LONGFELLOW INVESTMENT MANAGEMENT CO LLC100$560.0%2026-Q1
Clear Street Derivatives LLC105,049$74M41.0%2025-Q2 stale
Hudson Bay Capital Management LP new1,526,716$2M1.2%2025-Q4 stale
STIFEL FINANCIAL CORP758,584$2M1.0%2025-Q2 stale
VANGUARD GROUP INC added842,049$1M0.7%2025-Q4 stale
MARSHALL WACE, LLP added145,482$332K0.2%2025-Q3 stale
Avantax Planning Partners, Inc.231,336$266K0.1%2025-Q1 stale
CLEAR STREET LLC301,801$211K0.1%2025-Q2 stale
DNB Asset Management AS added136,473$194K0.1%2025-Q4 stale
BALYASNY ASSET MANAGEMENT L.P.190,324$135K0.1%2025-Q3 stale
Virtu Financial LLC added52,547$75K0.0%2025-Q4 stale
Quadrature Capital Ltd trimmed11,926$27K0.0%2025-Q3 stale
ANGELO GORDON & CO., L.P. new74,999$19K0.0%2025-Q1 stale
Tower Research Capital LLC (TRC) added3,949$6K0.0%2025-Q4 stale
Warberg Asset Management LLC20,000$5K0.0%2025-Q1 stale
TWO SIGMA SECURITIES, LLC trimmed13,197$3K0.0%2025-Q1 stale
Royal Bank of Canada new1,389$3K0.0%2025-Q2 stale
BANK OF AMERICA CORP /DE/ added5,941$3K0.0%2025-Q4 stale
HBW ADVISORY SERVICES LLC10,000$3K0.0%2025-Q1 stale
NewEdge Advisors, LLC1,700$2K0.0%2025-Q4 stale
FEDERATED HERMES, INC. trimmed451$1K0.0%2025-Q3 stale
Concord Wealth Partners new300$4260.0%2025-Q4 stale
HIGHBRIDGE CAPITAL MANAGEMENT LLC new100$1150.0%2025-Q1 stale
BARCLAYS PLC new2$20.0%2025-Q1 stale
SBI Securities Co., Ltd.1$10.0%2025-Q4 stale
CONCOURSE FINANCIAL GROUP SECURITIES, INC.00.0%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.

HoldersTotal shares

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.

Learn how to read institutional ownership