BIO
Bio-Rad Laboratories, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +6.7% ·
share flow -10.8% ·
net new positions +6.2%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 117 | -3 | 14.28M | $4.19B | +7 | −9 |
| Q1 2026 | 122 | +9 | 14.35M | $4.00B | +14 | −6 |
| Q4 2025 | 113 | -3 | 13.80M | $4.16B | +1 | −3 |
| Q3 2025 | 20 | +2 | 5.24M | $1.47B | +2 | −1 |
| Q2 2025 | 16 | -1 | 5.26M | $1.27B | +1 | −2 |
| Q1 2025 | 14 | -2 | 1.87M | $455.90M | — | −2 |
| Q4 2024 | 16 | +1 | 2.05M | $672.31M | +1 | — |
| Q3 2024 | 14 | +2 | 1.60M | $536.26M | +3 | −1 |
| Q2 2024 | 12 | — | 1.03M | $281.62M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 690.16K | — | $226.71M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | Millennium Management ✦ | 379.08K | -35.1% | $124.53M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 321.98K | -0.6% | $105.59M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 4 | Point72 Asset Management ✦ | 247.51K | -1.0% | $81.31M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 5 | Norges Bank ✦ (passive) | 126.77K | -34.8% | $41.64M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 6 | Fisher Asset Management ✦ | 106.87K | +15.2% | $35.11M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 7 | Arrowstreet Capital ✦ | 36.96K | +409.8% | $12.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | AQR Capital Management ✦ | 29.38K | -3.8% | $9.65M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 9 | T. Rowe Price ✦ | 29.14K | +5.5% | $9.57M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 10 | GAMCO Investors ✦ | 26.75K | 0.0% | $8.79M | 0.1% | Held | 3 | SEC ↗ |
| 11 | D. E. Shaw & Co. ✦ | 24.62K | +46.7% | $8.09M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 12 | Gotham Asset Management ✦ | 21.95K | +21.0% | $7.21M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 13 | Marshall Wace ✦ | 2.28K | New | $748,674 | 0.0% | New | 1 | SEC ↗ ×3 |
| 14 | Two Sigma Investments ✦ | 2.05K | +70.3% | $673,446 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | Citadel Advisors ✦ | 864 | -95.8% | $283,833 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 16 | Wellington Management ✦ | 810 | -91.9% | $266,093 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Marshall Wace | $748,674 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 387 holders, 19.87M shares, $5.29B 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.