Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MDXH held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Bleichroeder LP | 7.4M | $17.0M | 0.0% | 14.365% | 2.93% |
| 2 | AWM Investment Company, Inc. | 5.2M | $12.0M | 0.0% | 10.165% | 1.33% |
| 3 | MVM Partners, LLC | 4.7M | $10.8M | 0.0% | 9.151% | 100.00% |
| 4 | PERKINS CAPITAL MANAGEMENT INC | 1.5M | $3.4M | +7.1% | 2.874% | 3.18% |
| 5 | Samjo Management, LLC | 1.4M | $3.3M | +3.8% | 2.822% | 1.44% |
| 6 | Mink Brook Asset Management LLC | 1.2M | $2.8M | +356.9% | 2.343% | 1.54% |
| 7 | MILLENNIUM MANAGEMENT LLC | 545K | $1.3M | +366.3% | 1.060% | 0.00% |
| 8 | NORTHERN TRUST CORP | 495K | $1.1M | -0.8% | 0.963% | 0.00% |
| 9 | RENAISSANCE TECHNOLOGIES LLC | 305K | $701K | +21.8% | 0.593% | 0.00% |
| 10 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 268K | $616K | +8.4% | 0.521% | 0.00% |
| 11 | Panoramic Capital, LLC | 239K | $549K | 0.0% | 0.465% | 0.39% |
| 12 | KENNEDY CAPITAL MANAGEMENT, INC. | 205K | $473K | -48.0% | 0.400% | 0.01% |
| 13 | LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | 164K | $376K | — | 0.319% | 0.02% |
| 14 | Shay Capital LLC | 150K | $345K | -12.0% | 0.292% | 0.03% |
| 15 | BlackRock, Inc. | 104K | $240K | +5.2% | 0.203% | 0.00% |
| 16 | GOLDMAN SACHS GROUP INC | 99K | $227K | +16.8% | 0.192% | 0.00% |
| 17 | 683 Capital Management, LLC | 97K | $223K | -9.9% | 0.189% | 0.02% |
| 18 | Russell Investments Group, Ltd. | 69K | $158K | -64.5% | 0.134% | 0.00% |
| 19 | Hudson Bay Capital Management LP | 62K | $144K | +12.3% | 0.122% | 0.00% |
| 20 | CITADEL ADVISORS LLC | 60K | $137K | -37.3% | 0.116% | 0.00% |
| 21 | MARSHALL WACE, LLP | 50K | $115K | -70.6% | 0.098% | 0.00% |
| 22 | BANK OF AMERICA CORP /DE/ | 43K | $100K | +213.9% | 0.085% | 0.00% |
| 23 | XTX Topco Ltd | 38K | $87K | -7.7% | 0.073% | 0.00% |
| 24 | AlphaCentric Advisors LLC | 33K | $76K | -56.1% | 0.064% | 0.08% |
| 25 | GEODE CAPITAL MANAGEMENT, LLC | 29K | $67K | 0.0% | 0.057% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in MDXH — a direct measure of their conviction.
Filings activity in MDXH during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 50 | 11% | 199.99% | +0.00 pp | $57M | 34% |
| Q4 2025 | 56 | +33% | 199.99% | +0.00 pp | $87M | 18% |
| Q3 2025 | 42 | +91% | 199.99% | +29.25 pp | $106M | +123% |
| Q2 2025 | 22 | +0.0% | 170.74% | +62.81 pp | $48M | +58% |
| Q1 2025 | 22 | 12% | 107.93% | 83.12 pp | $30M | 44% |
| Q4 2024 | 25 | +4.2% | 191.05% | 8.94 pp | $53M | 99% |
| Q3 2024 | 24 | +140% | 199.99% | +128.33 pp | $7.61B | +38029% |
| Q2 2024 | 10 | — | 71.66% | — | $20M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MDXH stock.
Based on Q1 2026 13F filings, institutional ownership of MDxHealth S.A. stands at 200.0%, held across 50 reporting institutions.
Bleichroeder LP is the largest reported institutional holder of MDXH, with approximately 7,378,333 shares worth $0.02B as of Q1 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of MDXH, including MILLENNIUM MANAGEMENT LLC, RENAISSANCE TECHNOLOGIES LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for MDXH is 53 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
9 institutions opened new positions in MDXH during Q1 2026, while 15 fully exited. 4 added to existing positions and 37 trimmed.
MDXH institutional ownership rose by 0.00 percentage points quarter-over-quarter, with a net change of -6 holders.
The top 10 institutions account for 93.4% of all reported 13F value in MDXH, and the top 25 account for 99.2%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
MDxHealth S.A. (MDXH) Institutional Ownership