CTKB
CYTEK BIOSCI (CTKB)
NASDAQ
$5.44-$0.06 (-1.09%)
Price as of Oct 22, 2026 7:30 PM EDT
  • $714.9M
    Market Cap
  • 33.82%
    1-Year Change
  • Medical Devices
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK FUNDING, INC. /DE
14.22%
18.5M
-9,496 (-0.05%)
Dec 31, 2024
BLACKROCK INC.
13.13%
17.1M
-355,549 (-2.08%)
Jun 30, 2024
BLACKROCK, INC.
7.37%
9.6M
-7.4M (-77.55%)
Jun 30, 2026
MILLENNIUM MANAGEMENT LLC
7.18%
9.3M
+3.0M (+32.62%)
Jun 30, 2026
BOSTON PARTNERS
5.89%
7.7M
+1.9M (+24.26%)
Jun 30, 2026
VANGUARD GROUP INC
5.75%
7.5M
+541,973 (+7.25%)
Dec 31, 2025
HHLR ADVISORS, LTD.
5.12%
6.7M
0 (0.00%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions1.4B (72.57%)
  • Mutual Funds502.1M (26.14%)
  • Insiders24.9M (1.29%)
  • Other0 (0.00%)

Insider Transactions

  • 1.29% (24.9M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 0
    Number of InsiderSelling (last 12 months)
  • $0.00
    Amount 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