LAB
Standard BioTools Inc. · Healthcare · Medical - Specialties
Momentum inputs (comparable managers):
holder breadth +9.1% ·
share flow -2.2% ·
net new positions +8.3%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 63 | -12 | 121.60M | $100.00M | +9 | −21 |
| Q1 2026 | 78 | -1 | 139.51M | $128.36M | +4 | −5 |
| Q4 2025 | 78 | +1 | 157.79M | $201.97M | +1 | — |
| Q3 2025 | 15 | 0 | 128.39M | $166.92M | — | — |
| Q2 2025 | 12 | +1 | 121.19M | $145.43M | +1 | — |
| Q1 2025 | 8 | -2 | 82.05M | $88.62M | — | −2 |
| Q4 2024 | 10 | -2 | 83.56M | $146.24M | — | −2 |
| Q3 2024 | 11 | 0 | 85.39M | $164.80M | — | — |
| Q2 2024 | 11 | — | 90.16M | $159.59M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Viking Global Investors ✦ | 58.65M | 0.0% | $70.38M | 0.2% | Held | 5 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 24.82M | — | $29.79M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | The Vanguard Group ✦ (passive) | 16.98M | — | $20.38M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | The Vanguard Group ✦ (passive) | 16.98M | — | $20.38M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | The Vanguard Group ✦ (passive) | 16.98M | — | $20.38M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | The Vanguard Group ✦ (passive) | 16.98M | — | $20.38M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | The Vanguard Group ✦ (passive) | 16.98M | — | $20.38M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | Geode Capital Management ✦ (passive) | 7.44M | +3.3% | $8.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 20 | Geode Capital Management ✦ (passive) | 7.44M | +3.3% | $8.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 21 | State Street Global Advisors ✦ (passive) | 6.30M | -0.9% | $7.56M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 22 | ARK Investment Management ✦ | 3.16M | -8.6% | $3.79M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 23 | Millennium Management ✦ | 2.36M | -53.5% | $2.83M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 24 | AQR Capital Management ✦ | 612.06K | +26.7% | $734,476 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 25 | AQR Capital Management ✦ | 612.06K | +26.7% | $734,476 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 26 | AQR Capital Management ✦ | 612.06K | +26.7% | $734,476 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 27 | AQR Capital Management ✦ | 612.06K | +26.7% | $734,476 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 28 | AQR Capital Management ✦ | 612.06K | +26.7% | $734,476 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 29 | Citadel Advisors ✦ | 349.16K | New | $418,992 | 0.0% | New | 1 | SEC ↗ |
| 30 | PRIMECAP Management ✦ | 288.77K | -54.3% | $346,529 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 31 | T. Rowe Price ✦ | 209.66K | +7.3% | $252,000 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 32 | Fidelity (FMR) ✦ | 18.11K | — | $21,727 | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Fidelity (FMR) ✦ | 18.11K | — | $21,727 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Citadel Advisors | $418,992 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 154 holders, 297.10M shares, $272.49M 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.
15.0% of class · View original SEC filing ↗
22.7% of class · View original SEC filing ↗