Cytek Biosciences CTKB Insider Ownership

NASDAQ CTKB
$4.62 +0.00 (+0.00%)
As of: Sep 9, 2026 · 11:22 AM EDT

Insider Holdings by Owner

19.54Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
0.0024%
Shares Held by Insiders
3.09K
filed for Sep 2026
Shares Outstanding
127.55Mn
127,547,859 shares
Direct Holdings
3.09K
Indirect: 0
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
16
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters

Insider Ownership Summary

Quarter ending 30 Sep, 2026

CTKB's three largest insider shareholders as of September 09, 2026 are Wenbin Jiang (President And Ceo, 7.90Mn shares), Wenbin Jiang (President And Ceo, 5.56Mn shares), Wenbin Jiang (President And Ceo, 5.42Mn shares).

Form 4 Holdings

Insiders Holding CTKB

Insiders 16
Shares held 19.54Mn
Of outstanding 15.32%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Wenbin Jiang President And Ceo 13,462,570 0 13,462,570 68.9% 20 Aug, 2026
2 Ming Yan Chief Technology Officer 4,821,870 0 4,821,870 24.7% 20 Aug, 2026
3 Feng Deng Director 0 443,800 443,800 2.3% 27 Jul, 2021
4 Valerie Barnett Chief Legal Officer 150,012 0 150,012 0.8% 20 May, 2026
5 William D. Mccombe Chief Financial Officer 134,693 0 134,693 0.7% 20 Aug, 2026
6 Patrik Jeanmonod Chief Financial Officer 97,465 0 97,465 0.5% 13 Mar, 2024
7 Jack Ball Director 86,678 0 86,678 0.4% 12 Jun, 2026
8 Michael Holder Director 62,875 0 62,875 0.3% 20 Aug, 2026
9 Allen Poirson Svp Bus. And Corp. Dev. 59,981 0 59,981 0.3% 20 Nov, 2024
10 Vera Imper Director 59,679 0 59,679 0.3% 12 Jun, 2026
11 Deborah J Neff Director 59,679 0 59,679 0.3% 12 Jun, 2026
12 Philippe Busque Svp, Global Sales And Services 43,466 0 43,466 0.2% 20 May, 2026
13 Richard Chin Director 28,499 0 28,499 0.1% 20 Aug, 2026
14 Paul Christopher Williams Chief Operating Officer 16,473 0 16,473 0.1% 21 Aug, 2024
15 Jonathan Todd Garland Chief Commercial Officer 8,763 0 8,763 0.0% 21 Aug, 2023
16 Glenn P Muir Director 3,086 0 3,086 0.0% 20 Aug, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

1,478 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
18 Aug, 2026 Richard Chin Director Acquired M 6,107 28,499 Direct
18 Aug, 2026 Ming Yan Chief Technology Officer Acquired M 7,363 4,804,051 Direct
18 Aug, 2026 Glenn P Muir Director Acquired M 3,086 3,086 Direct
18 Aug, 2026 Wenbin Jiang President And Ceo Acquired M 11,781 5,488,984 Direct
18 Aug, 2026 Michael Holder Director Acquired M 2,181 62,875 Direct
18 Aug, 2026 William D. Mccombe Chief Financial Officer Acquired M 6,320 117,497 Direct
18 Aug, 2026 Michael Holder Director Disposed M 2,181 $0.00 $0 7,276 Direct
18 Aug, 2026 William D. Mccombe Chief Financial Officer Disposed F 2,111 $4.67 $9.86K 115,386 Direct
18 Aug, 2026 Richard Chin Director Disposed M 6,107 $0.00 $0 44,790 Direct
18 Aug, 2026 Wenbin Jiang President And Ceo Disposed F 2,869 $4.67 $13.40K 5,486,115 Direct
18 Aug, 2026 Ming Yan Chief Technology Officer Disposed F 1,778 $4.67 $8.30K 4,802,273 Direct
18 Aug, 2026 Glenn P Muir Director Disposed M 3,086 $0.00 $0 52,469 Direct
18 Aug, 2026 William D. Mccombe Chief Financial Officer Acquired M 13,051 128,437 Direct
18 Aug, 2026 Wenbin Jiang President And Ceo Acquired M 22,100 5,508,215 Direct
18 Aug, 2026 Ming Yan Chief Technology Officer Acquired M 5,525 4,807,798 Direct
18 Aug, 2026 Wenbin Jiang President And Ceo Disposed F 5,382 $4.67 $25.13K 5,502,833 Direct
18 Aug, 2026 Ming Yan Chief Technology Officer Disposed F 1,346 $4.67 $6.29K 4,806,452 Direct
18 Aug, 2026 William D. Mccombe Chief Financial Officer Disposed F 4,392 $4.67 $20.51K 124,045 Direct
18 Aug, 2026 Ming Yan Chief Technology Officer Acquired M 6,162 4,812,614 Direct
18 Aug, 2026 Wenbin Jiang President And Ceo Acquired M 29,002 5,531,835 Direct