Security record · archived quarter
TMDX
TransMedics Group, Inc. · Healthcare · Medical - Devices
17Tracked holders
+3Δ holders
18.14MShares held
$2.43BReported value
+3New positions
−0Exits
Momentum inputs (comparable managers):
holder breadth +21.4% ·
share flow +2.5% ·
net new positions +17.6%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 105 | -3 | 25.87M | $1.72B | +11 | −13 |
| 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 | — | — |
Who holds it · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 5.22M | — | $700.02M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | Fidelity (FMR) ✦ | 5.02M | — | $673.23M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | Fidelity (FMR) ✦ | 5.02M | — | $673.23M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | Fidelity (FMR) ✦ | 5.02M | — | $673.23M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Fidelity (FMR) ✦ | 5.02M | — | $673.23M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | Fidelity (FMR) ✦ | 5.02M | — | $673.23M | 0.0% | n/c | 1 | SEC ↗ |
| 23 | Fidelity (FMR) ✦ | 5.02M | — | $673.23M | 0.0% | n/c | 1 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 5.02M | — | $673.23M | 0.0% | n/c | 1 | SEC ↗ |
| 25 | The Vanguard Group ✦ (passive) | 3.60M | — | $481.89M | 0.0% | n/c | 1 | SEC ↗ |
| 26 | The Vanguard Group ✦ (passive) | 3.60M | — | $481.89M | 0.0% | n/c | 1 | SEC ↗ |
| 27 | The Vanguard Group ✦ (passive) | 3.60M | — | $481.89M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | The Vanguard Group ✦ (passive) | 3.60M | — | $481.89M | 0.0% | n/c | 1 | SEC ↗ |
| 29 | The Vanguard Group ✦ (passive) | 3.60M | — | $481.89M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | State Street Global Advisors ✦ (passive) | 1.29M | -1.3% | $172.74M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 31 | State Street Global Advisors ✦ (passive) | 1.29M | -1.3% | $172.74M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 32 | Geode Capital Management ✦ (passive) | 804.65K | +1.4% | $107.84M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 33 | Geode Capital Management ✦ (passive) | 804.65K | +1.4% | $107.84M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 34 | Marshall Wace ✦ | 546.79K | +258.7% | $73.27M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 35 | Marshall Wace ✦ | 546.79K | +258.7% | $73.27M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 36 | Marshall Wace ✦ | 546.79K | +258.7% | $73.27M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 37 | Marshall Wace ✦ | 546.79K | +258.7% | $73.27M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 38 | Two Sigma Investments ✦ | 411.99K | +1714.5% | $55.21M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 39 | Baillie Gifford ✦ | 262.96K | +1.3% | $35.24M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 40 | Baillie Gifford ✦ | 262.96K | +1.3% | $35.24M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 41 | Baillie Gifford ✦ | 262.96K | +1.3% | $35.24M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 42 | Baillie Gifford ✦ | 262.96K | +1.3% | $35.24M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 43 | Capital World Investors ✦ | 227.44K | 0.0% | $30.48M | 0.0% | Held | 2 | SEC ↗ |
| 44 | Wellington Management ✦ | 221.07K | -23.9% | $29.63M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 45 | Wellington Management ✦ | 221.07K | -23.9% | $29.63M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 46 | Wellington Management ✦ | 221.07K | -23.9% | $29.63M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 47 | Wellington Management ✦ | 221.07K | -23.9% | $29.63M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 48 | Citadel Advisors ✦ | 156.44K | -74.3% | $20.96M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 49 | Citadel Advisors ✦ | 156.44K | -74.3% | $20.96M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 50 | T. Rowe Price ✦ | 137.89K | +1.6% | $18.48M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 51 | T. Rowe Price ✦ | 137.89K | +1.6% | $18.48M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 52 | Millennium Management ✦ | 114.91K | New | $15.40M | 0.0% | New | 1 | SEC ↗ |
| 53 | D. E. Shaw & Co. ✦ | 77.04K | +330.2% | $10.32M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 54 | D. E. Shaw & Co. ✦ | 77.04K | +330.2% | $10.32M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 55 | Norges Bank ✦ (passive) | 40.27K | 0.0% | $5.40M | 0.0% | Held | 5 | SEC ↗ |
| 56 | AQR Capital Management ✦ | 4.97K | New | $665,761 | 0.0% | New | 1 | SEC ↗ |
| 57 | AQR Capital Management ✦ | 4.97K | New | $665,761 | 0.0% | New | 1 | SEC ↗ |
| 58 | AQR Capital Management ✦ | 4.97K | New | $665,761 | 0.0% | New | 1 | SEC ↗ |
| 59 | AQR Capital Management ✦ | 4.97K | New | $665,761 | 0.0% | New | 1 | SEC ↗ |
| 60 | AQR Capital Management ✦ | 4.97K | New | $665,761 | 0.0% | New | 1 | SEC ↗ |
| 61 | Gotham Asset Management ✦ | 3.16K | New | $423,338 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Millennium Management | $15.40M | 0.0% |
| AQR Capital Management | $665,761 | 0.0% |
| AQR Capital Management | $665,761 | 0.0% |
| AQR Capital Management | $665,761 | 0.0% |
| AQR Capital Management | $665,761 | 0.0% |
| AQR Capital Management | $665,761 | 0.0% |
| Gotham Asset Management | $423,338 | 0.0% |
Exited
| No tracked exits this quarter. |
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.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2025 ·
Methodology ·
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