Cytek
Builds Aurora spectral flow cytometers that profile 30-plus markers per sample on benchtop hardware.
$4.68
After-hours close−0.01 (−0.21%)
At close$4.69(+1.52%)
Something off on this page? Send us feedback.
Breakdown13F · Form 4
Institutions 64.00%82.65M sharesInsiders 8.52%11.01M sharesOther 27.48%35.49M shares
Shares outstanding 129.14M · Float 118.26M · 91.6% free float
Institutions13F, as of Jun 30, 2026
156 holders · 82.65M shares · 30 new positions · 75 increased · 64 reduced · 38 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 9.58M | 7.42% | −7.43M | Aug 7, 2026 |
| Millennium Management LLC | 9.34M | 7.23% | +3.05M | Aug 14, 2026 |
| Boston Partners | 7.66M | 5.93% | +1.86M | Aug 4, 2026 |
| HHLR Advisors, Ltd. | 6.66M | 5.15% | 0 | Aug 14, 2026 |
| Topline Capital Management, LLC | 6.28M | 4.87% | −781.0K | Aug 14, 2026 |
| Vanguard Capital Management LLC | 4.94M | 3.82% | +176.7K | Aug 13, 2026 |
| Geode Capital Management, LLC | 3.06M | 2.37% | +225.6K | Aug 12, 2026 |
| Dimensional Fund Advisors LP | 2.62M | 2.03% | −47.1K | Aug 11, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 13.10% | 16.53M | 13G | Jul 18, 2025 ↗ |
| Boston Partners | 5.91% | 7.64M | 13G | Aug 4, 2026 ↗ |
| Integrated Core Strategies (US) LLC | 5.40% | 6.97M | 13G | May 18, 2026 ↗ |
| Topline Capital Management, LLC | 5.30% | 6.78M | 13G | Nov 17, 2025 ↗ |
| Millennium Management LLC | 5.20% | 6.64M | 13G | Apr 9, 2026 ↗ |
| Hillhouse Investment Management, Ltd. | 5.10% | 6.66M | 13G | Nov 14, 2024 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Wenbin Jiang | director, officer: PRESIDENT AND CEO | 5.56M | 4.31% | Aug 20, 2026 |
| Ming Yan | director, officer: CHIEF TECHNOLOGY OFFICER | 4.82M | 3.73% | Aug 20, 2026 |
| Valerie Barnett | officer: CHIEF LEGAL OFFICER | 136.0K | 0.11% | May 20, 2026 |
| William D. McCombe | officer: Chief Financial Officer | 134.7K | 0.10% | Aug 20, 2026 |
| Jack Ball | director | 86.7K | 0.07% | Jun 12, 2026 |
| Michael Holder | director | 62.9K | 0.05% | Aug 20, 2026 |
| Vera Imper | director | 59.7K | 0.05% | Jun 12, 2026 |
| Deborah J. Neff | director | 59.7K | 0.05% | Jun 12, 2026 |
| Philippe Busque | officer: SVP, GLOBAL SALES AND SERVICES | 36.4K | 0.03% | May 20, 2026 |
| Richard Chin | director | 28.5K | 0.02% | Aug 20, 2026 |
8 people have not refiled in the last 18 months (27.09M shares), so they are not in the figure above
Latest trades
No open-market trades in the last 12 months.
CongressHouse and Senate disclosures
Not reported.