Spectral AI, Inc. (MDAI) Ownership
MDAI ownership summary
as of October 17, 2026- Institutions
- 19.6% of shares outstanding
- Insiders
- 13.42% of shares outstanding
- Shares outstanding
- 32.2M
- Float
- 27.9M shares available to trade
- Short interest
- 8.19% 2.3M shares short
- Days to cover
- 20.29 short interest up 6.8% vs prior month
- Institutions 19.60%
- Insiders 13.42%
- Other investors 66.98%
MDAI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 3.09% | 994K | $1.5M | +268,120 (+36.9%) | June 30, 2026 |
| 2 | Highlander Partners, L.P. | 2.80% | 900K | $1.4M | — | June 30, 2026 |
| 3 | Marshall Wace Asset Management Ltd | 2.57% | 827K | $1.2M | +827,454 (0.0%) | June 30, 2026 |
| 4 | Bridgeway Capital Management, LLC | 0.89% | 287K | $433,370 | +88,000 (+44.2%) | June 30, 2026 |
| 5 | Jane Street Group LLC | 0.70% | 226K | $341,742 | +5,318 (+2.4%) | June 30, 2026 |
| 6 | UBS Group AG | 0.70% | 226K | $340,993 | +112,803 (+99.8%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 0.69% | 223K | $336,118 | −78,612 (−26.1%) | June 30, 2026 |
| 8 | BlackRock Inc | 0.50% | 162K | $244,283 | +39,523 (+32.3%) | June 30, 2026 |
| 9 | LPL Financial Corp | 0.50% | 161K | $242,659 | +160,701 (0.0%) | June 30, 2026 |
| 10 | Vanguard Fiduciary Trust Co | 0.44% | 143K | $215,423 | +868 (+0.6%) | June 30, 2026 |
| 11 | University Of Texas Investment Mgmt Co | 0.38% | 122K | $183,784 | −88,777 (−42.2%) | June 30, 2026 |
| 12 | Rathbone Brothers PLC | 0.27% | 87K | $131,438 | −87,045 (−50.0%) | June 30, 2026 |
| 13 | State Street Corp | 0.23% | 76K | $114,156 | — | June 30, 2026 |
| 14 | Forum Financial Management, LP | 0.19% | 61K | $91,357 | — | June 30, 2026 |
| 15 | Northern Trust Corp | 0.16% | 51K | $76,326 | +18,449 (+57.5%) | June 30, 2026 |
| 16 | Virtu Financial LLC | 0.13% | 41K | $61,878 | +40,979 (0.0%) | June 30, 2026 |
| 17 | XTX Topco Ltd | 0.10% | 33K | $49,720 | +5,839 (+21.6%) | June 30, 2026 |
| 18 | JPMorgan Chase & Co | 0.06% | 20K | $30,591 | +20,259 (0.0%) | June 30, 2026 |
| 19 | N.E.W. Advisory Services LLC | 0.06% | 20K | $30,215 | +6,010 (+42.9%) | June 30, 2026 |
| 20 | Royal Bank of Canada | 0.05% | 15K | $23,333 | +15,452 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 1.6M shares and 3 cut 254K.
MDAI top mutual fund and ETF holders
8 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.28% | 733K | $1.1M | — | August 31, 2026 |
| 2 | Bridgeway Ultra-Small Company | 0.89% | 287K | $433,370 | +88,000 (+44.2%) | June 30, 2026 |
| 3 | Fidelity Extended Market Index | 0.38% | 123K | $185,402 | +7,145 (+6.2%) | August 31, 2026 |
| 4 | iShares Micro-Cap ETF | 0.27% | 88K | $132,477 | −605 (−0.7%) | September 30, 2026 |
| 5 | Fidelity Series Total Market Index | 0.09% | 30K | $45,822 | — | August 31, 2026 |
| 6 | Fidelity Total Market Index | 0.09% | 29K | $43,363 | — | August 31, 2026 |
| 7 | Vanguard Balanced Index Inv | 0.03% | 8,967 | $13,540 | −4,769 (−34.7%) | August 31, 2026 |
| 8 | 1290 VT Micro Cap K | 0.02% | 6,203 | $9,367 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
MDAI insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-05-10 | John Michael Dimaio | Buy | $1.72 | 6,000 | $10,320 |
| 2023-11-20 | John Michael Dimaio | Buy | $2.67 | 2,000 | $5,340 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
MDAI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns MDAI
Institutional investors own 19.6% of Spectral AI's shares and insiders 13.42%. The largest holder is Vanguard Capital Management, LLC with 3.09% of the shares (994K), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 3 reduced their stake in the latest filings. Short interest is 8.19% of the float, or 20.29 days of average trading volume. The share count rose 406.6% since 2020.
Related: MDAI analyst forecast, MDAI key metrics. See the MDAI stock overview for the latest quote and news.
MDAI ownership FAQ
Who owns the most Spectral AI stock?
The largest shareholders of Spectral AI are Vanguard Capital Management, LLC (3.09%), Highlander Partners, L.P. (2.80%), Marshall Wace Asset Management Ltd (2.57%), Bridgeway Capital Management, LLC (0.89%), Jane Street Group LLC (0.70%).
What percentage of Spectral AI is owned by institutions?
Institutions hold 19.6% of Spectral AI's shares outstanding; insiders hold 13.42%.
Which funds own Spectral AI?
The largest fund holders of Spectral AI are Vanguard MStar Total Stk Mkt Idx Invest (2.28%), Bridgeway Ultra-Small Company (0.89%), Fidelity Extended Market Index (0.38%), iShares Micro-Cap ETF (0.27%), Fidelity Series Total Market Index (0.09%).
What is Spectral AI's short interest?
2.3M shares of Spectral AI were sold short, 8.19% of the float; at the average daily volume it would take 20.29 days to cover.
Are insiders buying or selling Spectral AI?
Of the latest 2 reported insider transactions in Spectral AI (since November 20, 2023), 2 were purchases and 0 were sales.
How many shares of Spectral AI are outstanding?
Spectral AI has 32.2M shares outstanding, of which 27.9M are in the public float.