MDXHEALTH SA MDXH
SHS NEW · Common Stock · CUSIP B5950S113
- SectorHealth care
- IndustryServices-Medical Laboratories
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $0.41.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q4 2023 | 12 |
| Q1 2024 | 14 |
| Q2 2024 | 10 |
| Q3 2024 | 23 |
| Q4 2024 | 25 |
| Q1 2025 | 22 |
| Q2 2025 | 22 |
| Q3 2025 | 41 |
| Q4 2025 | 56 |
| Q1 2026 | 51 |
| Q2 2026 | 26 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 17 | 0 |
| Q4 2024 | 14 | 11 |
| Q1 2025 | 5 | 12 |
| Q2 2025 | 6 | 6 |
| Q3 2025 | 30 | 6 |
| Q4 2025 | 34 | 12 |
| Q1 2026 | 21 | 31 |
| Q2 2026 | 13 | 35 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $0 | $0 | — |
| Q4 2025 | $0 | $0 | — |
| Q1 2026 | $285.9m | $0 | 0.00 |
| Q2 2026 | $0 | $0 | — |
Biggest buyers
| JANE STREET GROUP, LLC | New | +503.2k |
| GSA CAPITAL PARTNERS LLP | Added | +470.9k |
| CITADEL ADVISORS LLC | Added | +450.0k |
| Squarepoint Ops LLC | New | +200.3k |
| HRT FINANCIAL LP | Added | +173.2k |
| XTX Topco Ltd | Added | +157.3k |
| Virtu Financial LLC | New | +134.2k |
| Ground Swell Capital, LLC | New | +88.1k |
| BlackRock, Inc. | Added | +42.7k |
| Tower Research Capital LLC (TRC) | New | +36.5k |
Biggest sellers
| AWM Investment Company, Inc. | Sold out | -5.2m |
| Samjo Management, LLC | Sold out | -1.4m |
| Mink Brook Asset Management LLC | Sold out | -1.2m |
| NORTHERN TRUST CORP | Sold out | -494.5k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -316.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Sold out | -267.7k |
| Panoramic Capital, LLC | Sold out | -238.7k |
| KENNEDY CAPITAL MANAGEMENT LLC | Sold out | -205.4k |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | Sold out | -163.7k |
| Shay Capital LLC | Sold out | -150.0k |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| LYTTON LAURENCE W 13G · passive investor +9.9 pts · filed 2026-08-17 | 19.5% |
| EXACT SCIENCES CORP 13G · passive investor filed 2026-01-16 | 12.0% |
Fell to 5% or below in the last year: AWM Investment Company, Inc. (0.0%, 2026-07-08)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 1 | $991.2k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-08-13 | Bednarski Eric +1 Director · See Footnote | Bought | $991.2k2.2m shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Bleichroeder LP 0.54% of their portfolio | 7.4m $3.0m | Unchanged |
| MVM Partners, LLC 100.00% of their portfolio | 4.7m $1.9m | Unchanged |
| PERKINS CAPITAL MANAGEMENT INC 0.44% of their portfolio | 1.4m $579.7k | Reduced -64.5k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 509.7k $209.3k | Added +450.0k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 503.2k $206.6k | New |
| GSA CAPITAL PARTNERS LLP 0.01% of their portfolio | 482.0k $198.0k | Added +470.9k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 325.1k $133.5k | Added +20.4k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 228.5k $93.8k | Reduced -316.2k |
| Squarepoint Ops LLC 0.00% of their portfolio | 200.3k $82.2k | New |
| XTX Topco Ltd 0.00% of their portfolio | 195.0k $80.1k | Added +157.3k |
| HRT FINANCIAL LP 0.00% of their portfolio | 184.5k $75.0k | Added +173.2k |
| BlackRock, Inc. 0.00% of their portfolio | 147.1k $60.4k | Added +42.7k |
| Virtu Financial LLC 0.00% of their portfolio | 134.2k $55.0k | New |
| Ground Swell Capital, LLC 0.04% of their portfolio | 88.1k $36.2k | New |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 36.5k $15.0k | New |
| FAS Wealth Partners, Inc. 0.00% of their portfolio | 22.6k $9.3k | Unchanged |
| Lido Advisors, LLC 0.00% of their portfolio | 20.3k $8.3k | Added +9.8k |
| Cambridge Investment Research Advisors, Inc. 0.00% of their portfolio | 20.0k $8.0k | Added +10.0k |
| Intesa Sanpaolo Wealth Management 0.00% of their portfolio | 10.0k $4.1k | Unchanged |
| MORGAN STANLEY 0.00% of their portfolio | 764 $313 | Reduced -15.6k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 200 $82 | Unchanged |
| Monetary Solutions, Ltd 0.00% of their portfolio | 85 $35 | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 29 $12 | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 16 $7 | Reduced -678 |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 10 $4 | Unchanged |
| UBS Group AG 0.00% of their portfolio | 3 $1 | Reduced -173 |