MGTX
MeiraGTx Holdings plc · Healthcare · Biotechnology
Momentum inputs (comparable managers):
holder breadth +7.1% ·
share flow -0.2% ·
net new positions +6.7%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 63 | +4 | 21.97M | $296.37M | +8 | −4 |
| Q1 2026 | 61 | +4 | 17.36M | $150.28M | +6 | −2 |
| Q4 2025 | 57 | 0 | 17.52M | $139.25M | — | — |
| Q3 2025 | 15 | +1 | 13.50M | $111.10M | +1 | — |
| Q2 2025 | 11 | 0 | 11.90M | $77.60M | +1 | −1 |
| Q1 2025 | 8 | 0 | 7.28M | $49.35M | +1 | −1 |
| Q4 2024 | 8 | 0 | 6.77M | $41.23M | — | — |
| Q3 2024 | 7 | -1 | 6.26M | $26.11M | — | −1 |
| Q2 2024 | 8 | — | 6.33M | $26.64M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Adage Capital Partners ✦ | 4.18M | -30.7% | $34.44M | 0.1% | ▼ Trim | 6 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 2.77M | -3.1% | $22.83M | 0.0% | ▼ Trim | 2 | SEC ↗ ×10 |
| 3 | Millennium Management ✦ | 2.56M | +226.2% | $21.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | Morgan Stanley ✦ | 1.24M | — | $10.22M | 0.0% | n/c | 1 | SEC ↗ ×7 |
| 5 | State Street Global Advisors ✦ (passive) | 681.03K | -0.2% | $5.60M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 6 | Geode Capital Management ✦ (passive) | 555.31K | -0.4% | $4.57M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 7 | The Vanguard Group ✦ (passive) | 463.94K | +10.3% | $3.82M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 8 | Goldman Sachs Group ✦ | 260.22K | — | $2.14M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 9 | Citadel Advisors ✦ | 204.87K | +1.6% | $1.69M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 10 | D. E. Shaw & Co. ✦ | 173.20K | New | $1.43M | 0.0% | New | 1 | SEC ↗ ×2 |
| 11 | Wellington Management ✦ | 141.74K | -36.3% | $1.17M | 0.0% | ▼ Trim | 6 | SEC ↗ ×3 |
| 12 | JPMorgan Chase ✦ | 120.79K | — | $994,086 | 0.0% | n/c | 1 | SEC ↗ ×8 |
| 13 | AQR Capital Management ✦ | 107.78K | +1.1% | $887,062 | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 14 | T. Rowe Price ✦ | 22.78K | 0.0% | $188,000 | 0.0% | Held | 6 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 5.52K | +1.1% | $45,463 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| D. E. Shaw & Co. | $1.43M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 132 holders, 67.36M shares, $581.89M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 27.66K sh · $294,292
Officer, Director · 62.00K sh · $859,320
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology