TNDM
Tandem Diabetes Care, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +7.7% ·
share flow -11.7% ·
net new positions +7.1%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 96 | -2 | 42.96M | $645.44M | +8 | −10 |
| Q1 2026 | 101 | +1 | 46.93M | $900.01M | +9 | −9 |
| Q4 2025 | 101 | +3 | 51.29M | $1.10B | +5 | −1 |
| Q3 2025 | 16 | -4 | 31.69M | $384.56M | — | −4 |
| Q2 2025 | 17 | +2 | 28.59M | $532.96M | +3 | −1 |
| Q1 2025 | 12 | -2 | 7.22M | $138.30M | — | −2 |
| Q4 2024 | 14 | -1 | 8.91M | $320.82M | — | −1 |
| Q3 2024 | 14 | +1 | 9.24M | $392.07M | +1 | — |
| Q2 2024 | 13 | — | 10.47M | $421.99M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Capital World Investors ✦ | 3.27M | -10.9% | $138.48M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 1.53M | +1.2% | $64.72M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 1.53M | +1.2% | $64.72M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | Millennium Management ✦ | 1.43M | +36.1% | $60.84M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 5 | Two Sigma Investments ✦ | 824.71K | -27.4% | $34.98M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 6 | Marshall Wace ✦ | 813.59K | +55.1% | $34.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | Marshall Wace ✦ | 813.59K | +55.1% | $34.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | Citadel Advisors ✦ | 347.82K | -80.8% | $14.75M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 9 | Point72 Asset Management ✦ | 240.71K | New | $10.21M | 0.0% | New | 1 | SEC ↗ |
| 10 | Baillie Gifford ✦ | 222.27K | -0.1% | $9.43M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 11 | Baillie Gifford ✦ | 222.27K | -0.1% | $9.43M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 12 | Baillie Gifford ✦ | 222.27K | -0.1% | $9.43M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 13 | Baillie Gifford ✦ | 222.27K | -0.1% | $9.43M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 14 | Renaissance Technologies ✦ | 210.43K | -28.9% | $8.92M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 15 | Adage Capital Partners ✦ | 159.60K | +145.5% | $6.77M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | Gotham Asset Management ✦ | 120.31K | -8.0% | $5.10M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 17 | T. Rowe Price ✦ | 45.20K | +0.9% | $1.92M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | Bridgewater Associates ✦ | 25.64K | +107.8% | $1.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | AQR Capital Management ✦ | 8.49K | +15.9% | $360,018 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | AQR Capital Management ✦ | 8.49K | +15.9% | $360,018 | 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
| Point72 Asset Management | $10.21M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1 holders, 51.40K shares, $985 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.