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CYTEK BIOSCI (CTKB)
NASDAQ
$4.60-$0.21 (-4.37%)
Price as of Aug 21, 2026 7:30 PM EDT- $625.2MMarket Cap
- 15.90%1-Year Change
- Medical DevicesIndustry
CYTEK BIOSCI (CTKB)
$4.60-$0.21 (-4.37%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
BLACKROCK FUNDING, INC. /DE | 14.31% | 18.5M | -9,496 (-0.05%) | Dec 31, 2024 |
BLACKROCK INC. | 13.22% | 17.1M | -355,549 (-2.08%) | Jun 30, 2024 |
BLACKROCK, INC. | 7.42% | 9.6M | -7.4M (-77.55%) | Jun 30, 2026 |
MILLENNIUM MANAGEMENT LLC | 7.23% | 9.3M | +3.0M (+32.62%) | Jun 30, 2026 |
BOSTON PARTNERS | 5.93% | 7.7M | +1.9M (+24.26%) | Jun 30, 2026 |
VANGUARD GROUP INC | 5.79% | 7.5M | +541,973 (+7.25%) | Dec 31, 2025 |
HHLR ADVISORS, LTD. | 5.15% | 6.7M | 0 (0.00%) | Jun 30, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
iSHARES TRUST | 9.71% | 12.5M | 0 (0.00%) | May 31, 2026 |
VANGUARD INDEX FUNDS | 3.59% | 4.6M | +36,725 (+0.79%) | Mar 31, 2026 |
TRUST FOR PROFESSIONAL MANAGERS | 1.84% | 2.4M | +635,476 (+26.71%) | May 31, 2026 |
SPDR SERIES TRUST | 1.24% | 1.6M | 0 (0.00%) | Apr 30, 2026 |
DFA INVESTMENT DIMENSIONS GROUP INC | 1.10% | 1.4M | +48,829 (+3.44%) | Apr 30, 2026 |
ROYCE MICRO-CAP TRUST, INC. | 1.02% | 1.3M | +321,061 (+24.32%) | Jun 30, 2026 |
FIDELITY SALEM STREET TRUST | 0.91% | 1.2M | +1.0M (+87.64%) | Apr 30, 2026 |
Current Ownership Distribution
- Institutions1.4B (74.00%)
- Mutual Funds465.0M (24.68%)
- Insiders24.9M (1.32%)
- Other0 (0.00%)
Insider Transactions
- 1.32% (24.9M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 0Number of InsiderSelling (last 12 months)
- $0.00Amount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Chin Richard | Exempt | Aug 18, 2026 | $0.00 | 6,107 | $0.00 | 44,790 |
Holder Michael | Exempt | Aug 18, 2026 | $0.00 | 2,181 | $0.00 | 7,276 |
Yan Ming CHIEF TECHNOLOGY OFFICER | Exempt | Aug 18, 2026 | $0.00 | 7,363 | $0.00 | 17,189 |
McCombe William D. Chief Financial Officer | Exempt | Aug 18, 2026 | $0.00 | 6,320 | $0.00 | 44,249 |
Jiang Wenbin PRESIDENT AND CEO | Exempt | Aug 18, 2026 | $0.00 | 11,781 | $0.00 | 27,494 |
MUIR GLENN P | Exempt | Aug 18, 2026 | $0.00 | 3,086 | $0.00 | 52,469 |
Yan Ming CHIEF TECHNOLOGY OFFICER | Exempt | Aug 18, 2026 | $0.00 | 5,525 | $0.00 | 34,995 |
McCombe William D. Chief Financial Officer | Exempt | Aug 18, 2026 | $0.00 | 13,051 | $0.00 | 134,862 |
Chin Richard | Exempt | Aug 18, 2026 | $0.00 | 6,107 | $0.00 | 28,499 |
Holder Michael | Exempt | Aug 18, 2026 | $0.00 | 2,181 | $0.00 | 62,875 |
Yan Ming CHIEF TECHNOLOGY OFFICER | Exempt | Aug 18, 2026 | $0.00 | 6,162 | $0.00 | 63,688 |
McCombe William D. Chief Financial Officer | Exempt | Aug 18, 2026 | $0.00 | 16,049 | $0.00 | 230,042 |
Jiang Wenbin PRESIDENT AND CEO | Exempt | Aug 18, 2026 | $0.00 | 22,100 | $0.00 | 139,973 |
MUIR GLENN P | Exempt | Aug 18, 2026 | $0.00 | 3,086 | $0.00 | 3,086 |
Yan Ming CHIEF TECHNOLOGY OFFICER | Exempt | Aug 18, 2026 | $0.00 | 14,220 | $0.00 | 203,835 |
McCombe William D. Chief Financial Officer | Exempt | Aug 18, 2026 | $0.00 | 6,320 | $0.00 | 117,497 |
Jiang Wenbin PRESIDENT AND CEO | Exempt | Aug 18, 2026 | $0.00 | 29,002 | $0.00 | 299,694 |
McCombe William D. Chief Financial Officer | In Kind | Aug 18, 2026 | $9,858.37 | 2,111 | $4.67 | 115,386 |
Yan Ming CHIEF TECHNOLOGY OFFICER | Exempt | Aug 18, 2026 | $0.00 | 7,363 | $0.00 | 4.8M |
McCombe William D. Chief Financial Officer | Exempt | Aug 18, 2026 | $0.00 | 13,051 | $0.00 | 128,437 |
Jiang Wenbin PRESIDENT AND CEO | Exempt | Aug 18, 2026 | $0.00 | 57,212 | $0.00 | 820,054 |
McCombe William D. Chief Financial Officer | In Kind | Aug 18, 2026 | $20,510.64 | 4,392 | $4.67 | 124,045 |
Yan Ming CHIEF TECHNOLOGY OFFICER | In Kind | Aug 18, 2026 | $8,303.26 | 1,778 | $4.67 | 4.8M |
McCombe William D. Chief Financial Officer | Exempt | Aug 18, 2026 | $0.00 | 16,049 | $0.00 | 140,094 |
Jiang Wenbin PRESIDENT AND CEO | Exempt | Aug 18, 2026 | $0.00 | 11,781 | $0.00 | 5.5M |
McCombe William D. Chief Financial Officer | In Kind | Aug 18, 2026 | $25,222.67 | 5,401 | $4.67 | 134,693 |
Yan Ming CHIEF TECHNOLOGY OFFICER | Exempt | Aug 18, 2026 | $0.00 | 5,525 | $0.00 | 4.8M |
Jiang Wenbin PRESIDENT AND CEO | In Kind | Aug 18, 2026 | $13,398.23 | 2,869 | $4.67 | 5.5M |
Yan Ming CHIEF TECHNOLOGY OFFICER | In Kind | Aug 18, 2026 | $6,285.82 | 1,346 | $4.67 | 4.8M |
Jiang Wenbin PRESIDENT AND CEO | Exempt | Aug 18, 2026 | $0.00 | 22,100 | $0.00 | 5.5M |