DXCM
DexCom, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth -4.2% ·
share flow +1.4% ·
net new positions -4.3%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 166 | +2 | 299.42M | $20.12B | +7 | −7 |
| Q1 2026 | 169 | 0 | 297.37M | $18.71B | +3 | −4 |
| Q4 2025 | 168 | 0 | 314.09M | $20.85B | +1 | — |
| Q3 2025 | 26 | +1 | 175.97M | $11.84B | +1 | −1 |
| Q2 2025 | 23 | -1 | 152.74M | $13.33B | — | −1 |
| Q1 2025 | 21 | 0 | 61.18M | $4.17B | — | — |
| Q4 2024 | 21 | +1 | 69.06M | $5.37B | +1 | — |
| Q3 2024 | 19 | -2 | 54.56M | $3.66B | — | −2 |
| Q2 2024 | 21 | — | 52.99M | $6.01B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 48.32M | — | $4.22B | 0.1% | n/c | 1 | SEC ↗ ×6 |
| 2 | BlackRock ✦ (passive) | 39.03M | — | $3.41B | 0.1% | n/c | 1 | SEC ↗ ×24 |
| 3 | State Street Global Advisors ✦ (passive) | 16.86M | +1.1% | $1.47B | 0.1% | ▲ Add | 3 | SEC ↗ ×2 |
| 4 | Baillie Gifford ✦ | 16.71M | +17.8% | $1.46B | 1.1% | ▲ Add | 5 | SEC ↗ ×4 |
| 5 | Geode Capital Management ✦ (passive) | 10.77M | +3.5% | $936.10M | 0.1% | ▲ Add | 5 | SEC ↗ ×2 |
| 6 | Norges Bank ✦ (passive) | 5.19M | +5.8% | $453.28M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 7 | Marshall Wace ✦ | 3.82M | +260.7% | $333.63M | 0.4% | ▲ Add | 5 | SEC ↗ ×4 |
| 8 | Fidelity (FMR) ✦ | 2.12M | — | $185.31M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 9 | D. E. Shaw & Co. ✦ | 1.96M | -36.4% | $171.23M | 0.2% | ▼ Trim | 5 | SEC ↗ ×2 |
| 10 | T. Rowe Price ✦ | 1.75M | +17.2% | $152.62M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 11 | Capital World Investors ✦ | 1.39M | -54.9% | $121.06M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 12 | Citadel Advisors ✦ | 1.37M | -35.7% | $119.48M | 0.1% | ▼ Trim | 5 | SEC ↗ ×2 |
| 13 | Renaissance Technologies ✦ | 697.80K | +10.6% | $60.91M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 624.38K | -11.9% | $54.29M | 0.0% | ▼ Trim | 5 | SEC ↗ ×7 |
| 15 | Adage Capital Partners ✦ | 408.69K | +2602.8% | $35.67M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 16 | Wellington Management ✦ | 317.56K | -56.1% | $27.72M | 0.0% | ▼ Trim | 5 | SEC ↗ ×5 |
| 17 | Fisher Asset Management ✦ | 286.62K | -28.3% | $25.02M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 18 | Arrowstreet Capital ✦ | 282.40K | +172.8% | $24.65M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 19 | Bridgewater Associates ✦ | 253.81K | +256.0% | $22.16M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 20 | Millennium Management ✦ | 251.31K | -27.5% | $21.94M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 21 | Two Sigma Investments ✦ | 194.79K | -68.4% | $17.00M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 22 | Gotham Asset Management ✦ | 83.35K | -26.6% | $7.28M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 23 | GAMCO Investors ✦ | 52.00K | 0.0% | $4.54M | 0.0% | Held | 5 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Point72 Asset Management | $26.42M | was 0.1% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1 holders, 15.50K shares, $973 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 · 2.56K sh · $220,975
Director · 6.54K sh · $549,538
Officer · 1.70K sh · $142,868
Director · 1.55K sh · $130,231
Officer · 3.64K sh · $302,936
Officer · 2.56K sh · $226,669
Officer, Director · 19.31K sh · $1.73M
Officer, Director · 97 sh · $8,867
Officer, Director · 7.35K sh · $667,332
Officer · 1.70K sh · $156,281
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology