TMDX
TransMedics Group, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth -8.3% ·
share flow +6.6% ·
net new positions -9.1%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 103 | -3 | 25.85M | $1.72B | +11 | −15 |
| Q1 2026 | 110 | -2 | 27.24M | $2.71B | +6 | −9 |
| Q4 2025 | 113 | -2 | 29.10M | $3.52B | +1 | −2 |
| Q3 2025 | 21 | +2 | 20.81M | $2.34B | +2 | −1 |
| Q2 2025 | 17 | +3 | 18.14M | $2.43B | +3 | — |
| Q1 2025 | 11 | -1 | 3.86M | $259.47M | +2 | −3 |
| Q4 2024 | 12 | +2 | 3.62M | $225.65M | +3 | −1 |
| Q3 2024 | 9 | -4 | 2.19M | $344.12M | — | −4 |
| Q2 2024 | 13 | — | 2.46M | $370.15M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 1.31M | -4.0% | $87.90M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 2 | Geode Capital Management ✦ (passive) | 793.41K | +2.7% | $53.39M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 3 | Citadel Advisors ✦ | 609.69K | +161.7% | $41.02M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 4 | Wellington Management ✦ | 290.62K | +76.7% | $19.55M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 5 | Baillie Gifford ✦ | 259.68K | -3.8% | $17.47M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 6 | Capital World Investors ✦ | 227.44K | New | $15.30M | 0.0% | New | 1 | SEC ↗ |
| 7 | Marshall Wace ✦ | 152.45K | New | $10.26M | 0.0% | New | 1 | SEC ↗ ×3 |
| 8 | T. Rowe Price ✦ | 135.70K | -47.5% | $9.13M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 9 | Norges Bank ✦ (passive) | 40.27K | -89.0% | $2.71M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 10 | Two Sigma Investments ✦ | 22.70K | +81.3% | $1.53M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | D. E. Shaw & Co. ✦ | 17.91K | +147.3% | $1.20M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Capital World Investors | $15.30M | 0.0% |
| Marshall Wace | $10.26M | 0.0% |
Exited
| Millennium Management | $10.28M | was 0.0% |
| AQR Capital Management | $263,866 | was 0.0% |
| Bridgewater Associates | $215,918 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 412 holders, 36.17M shares, $3.51B 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.