Security record · archived quarter
CTKB
Cytek Biosciences, Inc. · Healthcare · Medical - Devices
7Tracked holders
0Δ holders
5.47MShares held
$30.29MReported value
+0New positions
−0Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -9.6% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
Ownership over time
| 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 | — | — |
Who holds it · Q3 2024
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Geode Capital Management ✦ (passive) | 2.67M | +3.5% | $14.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 2.67M | +3.5% | $14.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | Wellington Management ✦ | 2.01M | -6.0% | $11.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 4 | Citadel Advisors ✦ | 270.57K | +373.6% | $1.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 5 | Citadel Advisors ✦ | 270.57K | +373.6% | $1.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 6 | Renaissance Technologies ✦ | 211.60K | -9.5% | $1.17M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 7 | Millennium Management ✦ | 190.61K | -79.9% | $1.06M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 8 | AQR Capital Management ✦ | 79.91K | +32.9% | $442,679 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | AQR Capital Management ✦ | 79.91K | +32.9% | $442,679 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | T. Rowe Price ✦ | 39.50K | +3.1% | $219,000 | 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
| No new tracked buyers this quarter. |
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.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Aug 06
SC 13G/A — MILLENNIUM MANAGEMENT LLC
Aug 04
SC 13G — Boston Partners
Jul 08
SC 13G/A — BlackRock, Inc.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q3 2024 ·
Methodology ·
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