CTKB
Cytek Biosciences, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +26.7% ·
share flow +8.0% ·
net new positions +20.0%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 74 | 0 | 60.52M | $268.04M | +6 | −6 |
| Q1 2026 | 76 | +1 | 60.92M | $266.22M | +4 | −3 |
| Q4 2025 | 75 | -1 | 61.04M | $308.28M | — | −1 |
| Q3 2025 | 19 | +4 | 43.35M | $150.42M | +4 | — |
| Q2 2025 | 12 | 0 | 36.22M | $123.14M | +1 | −1 |
| Q1 2025 | 9 | 0 | 9.63M | $38.61M | +1 | −1 |
| Q4 2024 | 9 | +1 | 10.70M | $69.47M | +1 | — |
| Q3 2024 | 7 | 0 | 5.47M | $30.29M | — | — |
| Q2 2024 | 7 | — | 6.05M | $33.76M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 16.55M | -2.9% | $57.42M | 0.0% | ▼ Trim | 2 | SEC ↗ ×8 |
| 2 | The Vanguard Group ✦ (passive) | 6.93M | -10.7% | $24.06M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 3 | State Street Global Advisors ✦ (passive) | 4.08M | -2.1% | $14.17M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 4 | Millennium Management ✦ | 3.42M | +269.6% | $11.86M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 2.78M | +2.0% | $9.66M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 6 | Wellington Management ✦ | 2.54M | New | $8.82M | 0.0% | New | 1 | SEC ↗ ×4 |
| 7 | Goldman Sachs Group ✦ | 1.74M | — | $6.03M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 8 | Morgan Stanley ✦ | 1.46M | — | $5.08M | 0.0% | n/c | 1 | SEC ↗ ×8 |
| 9 | AQR Capital Management ✦ | 1.02M | -17.6% | $3.54M | 0.0% | ▼ Trim | 6 | SEC ↗ ×5 |
| 10 | Renaissance Technologies ✦ | 795.54K | -25.2% | $2.76M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 11 | JPMorgan Chase ✦ | 717.45K | — | $2.49M | 0.0% | n/c | 1 | SEC ↗ ×8 |
| 12 | Arrowstreet Capital ✦ | 361.29K | +150.5% | $1.25M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 13 | Point72 Asset Management ✦ | 187.62K | New | $651,033 | 0.0% | New | 1 | SEC ↗ |
| 14 | Fidelity (FMR) ✦ | 180.79K | -12.1% | $627,327 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 15 | Two Sigma Investments ✦ | 175.76K | New | $609,884 | 0.0% | New | 1 | SEC ↗ |
| 16 | Marshall Wace ✦ | 134.29K | -48.6% | $465,975 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 17 | D. E. Shaw & Co. ✦ | 121.02K | New | $419,946 | 0.0% | New | 1 | SEC ↗ |
| 18 | Citadel Advisors ✦ | 82.30K | -86.7% | $285,595 | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 19 | T. Rowe Price ✦ | 62.13K | +9.3% | $216,000 | 0.0% | ▲ Add | 6 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Wellington Management | $8.82M | 0.0% |
| Point72 Asset Management | $651,033 | 0.0% |
| Two Sigma Investments | $609,884 | 0.0% |
| D. E. Shaw & Co. | $419,946 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 164 holders, 84.77M shares, $364.62M 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.