Cytek Biosciences, Inc. (CTKB)
$4.68+$0.06 (+1.30%) Today
Cytek Biosciences Inc is a cell analysis solutions company advancing the next generation of research and clinical tools with its novel technical approach of leveraging the full spectrum of fluorescence signatures from multiple lasers to distinguish fluorescent tags on single cells. Its patented FSP technology optimizes sensitivity and accuracy through its optical and electronic designs that utilize an inventive method of light detection and distribution to a specifically selected number and type of detectors. Its FSP cell analyzers, the Cytek Aurora, Northern Lights, and Cytek Aurora Evo systems, deliver high-resolution, high-content and high-sensitivity cell analysis and address the inherent limitations of other technologies.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Grant or award | 12 | 660,300 | |
| Option exercise | 36 | 752,102 | |
| Tax withholding / forfeiture | 11 | 56,261 | |
| Bona-fide gift | 1 | 135,892 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
55 Form 4 filings on record, the earliest from Nov 20, 2024, newest first. Filing history page 2 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 1,332 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Common Stock | 1,332 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 395 | $4.20 | $2K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 1,346 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 525 | $4.20 | $2K | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 1,346 | $0.00 | - | |
| William D. McCombe - Officer | Option exercise | Common Stock | 6,320 | - | - | |
| William D. McCombe - Officer | Tax withholding / forfeiture | Common Stock | 2,032 | $5.53 | $11K | |
| William D. McCombe - Officer | Option exercise | Common Stock | 13,051 | - | - | |
| William D. McCombe - Officer | Tax withholding / forfeiture | Common Stock | 4,196 | $5.53 | $23K | |
| William D. McCombe - Officer | Option exercise | Restricted Stock Units | 6,320 | $0.00 | - | |
| William D. McCombe - Officer | Option exercise | Restricted Stock Units | 13,051 | $0.00 | - | |
| Richard Chin | Option exercise | Common Stock | 6,107 | - | - | |
| Richard Chin | Option exercise | Restricted Stock Units | 6,107 | $0.00 | - | |
| Michael Holder | Option exercise | Restricted Stock Units | 2,181 | $0.00 | - | |
| Michael Holder | Option exercise | Common Stock | 2,181 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 8,697 | $5.53 | $48K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 29,002 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 11,413 | $5.53 | $63K | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 6,758 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 11,781 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 22,100 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 29,002 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 6,758 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 2,660 | $5.53 | $15K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 11,781 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 4,636 | $5.53 | $26K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 22,100 | - | - | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 7,735 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 2,487 | $5.53 | $14K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 10,875 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 3,497 | $5.53 | $19K | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 2,016 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 3,681 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 7,735 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 10,875 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 2,016 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 649 | $5.53 | $4K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 3,681 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 1,184 | $5.53 | $7K | |
| Ming Yan - Officer | Option exercise | Common Stock | 6,162 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 1,501 | $5.53 | $8K | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 1,981 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 7,363 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 5,525 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 6,162 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Common Stock | 1,981 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 483 | $5.53 | $3K | |
| Ming Yan - Officer | Option exercise | Common Stock | 7,363 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 1,793 | $5.53 | $10K | |
| Ming Yan - Officer | Option exercise | Common Stock | 5,525 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 1,346 | $5.53 | $7K | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 3,625 | $0.00 | - | |
| Philippe Busque - Officer | Option exercise | Common Stock | 1,536 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 393 | $5.53 | $2K | |
| Philippe Busque - Officer | Option exercise | Common Stock | 2,210 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 565 | $5.53 | $3K | |
| Philippe Busque - Officer | Option exercise | Common Stock | 3,625 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 927 | $5.53 | $5K | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 1,536 | $0.00 | - | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 2,210 | $0.00 | - | |
| Philippe Busque - Officer | Option exercise | Common Stock | 1,536 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 599 | $4.06 | $2K | |
| Philippe Busque - Officer | Option exercise | Common Stock | 2,210 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 861 | $4.06 | $3K | |
| Philippe Busque - Officer | Option exercise | Common Stock | 3,625 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 1,412 | $4.06 | $6K | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 1,536 | $0.00 | - | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 2,210 | $0.00 | - | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 3,625 | $0.00 | - | |
| Michael Holder | Option exercise | Common Stock | 2,181 | $0.00 | - | |
| Michael Holder | Option exercise | Restricted Stock Units | 2,181 | $0.00 | - | |
| William D. McCombe - Officer | Option exercise | Common Stock | 6,320 | - | - | |
| William D. McCombe - Officer | Tax withholding / forfeiture | Common Stock | 2,462 | $4.06 | $10K | |
| William D. McCombe - Officer | Option exercise | Common Stock | 13,051 | - | - | |
| William D. McCombe - Officer | Tax withholding / forfeiture | Common Stock | 5,084 | $4.06 | $21K | |
| William D. McCombe - Officer | Option exercise | Restricted Stock Units | 6,320 | $0.00 | - | |
| William D. McCombe - Officer | Option exercise | Restricted Stock Units | 13,051 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 6,758 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 1,646 | $4.06 | $7K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 11,781 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 2,869 | $4.06 | $12K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 22,100 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 5,382 | $4.06 | $22K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 29,002 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 7,062 | $4.06 | $29K | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 6,758 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 11,781 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 22,100 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 29,002 | $0.00 | - | |
| Richard Chin | Option exercise | Common Stock | 4,071 | - | - | |
| Richard Chin | Option exercise | Restricted Stock Units | 4,071 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Common Stock | 1,981 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 588 | $4.06 | $2K | |
| Ming Yan - Officer | Option exercise | Common Stock | 7,363 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 2,184 | $4.06 | $9K | |
| Ming Yan - Officer | Option exercise | Common Stock | 5,525 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 1,498 | $4.06 | $6K | |
| Ming Yan - Officer | Option exercise | Common Stock | 6,162 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 1,468 | $4.06 | $6K | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 1,981 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 7,363 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 5,525 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 6,162 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 2,016 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 786 | $4.06 | $3K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 3,681 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 1,434 | $4.06 | $6K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 7,735 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 3,000 | $4.06 | $12K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 10,875 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 3,609 | $4.06 | $15K | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 2,016 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 3,681 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 7,735 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 10,875 | $0.00 | - | |
| Deborah J. Neff | Grant or award | Restricted Stock Units | 43,973 | $0.00 | - | |
| Deborah J. Neff | Grant or award | Director Stock Option (right to buy) | 23,809 | $0.00 | - | |
| Deborah J. Neff | Option exercise | Common Stock | 15,706 | - | - | |
| Deborah J. Neff | Option exercise | Restricted Stock Units | 15,706 | $0.00 | - | |
| Don M. Hardison | Option exercise | Common Stock | 15,706 | - | - | |
| Don M. Hardison | Option exercise | Restricted Stock Units | 15,706 | $0.00 | - | |
| Philippe Busque - Officer | Option exercise | Common Stock | 1,536 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 599 | $6.03 | $4K | |
| Philippe Busque - Officer | Option exercise | Common Stock | 2,210 | - | - | |
| Philippe Busque - Officer | Tax withholding / forfeiture | Common Stock | 861 | $6.03 | $5K | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 1,536 | $0.00 | - | |
| Philippe Busque - Officer | Option exercise | Restricted Stock Units | 2,210 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 6,758 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 1,646 | $6.03 | $10K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 11,781 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 2,869 | $6.03 | $17K | |
| Wenbin Jiang - Officer | Option exercise | Common Stock | 22,100 | - | - | |
| Wenbin Jiang - Officer | Tax withholding / forfeiture | Common Stock | 5,382 | $6.03 | $32K | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 6,758 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 11,781 | $0.00 | - | |
| Wenbin Jiang - Officer | Option exercise | Restricted Stock Units | 22,100 | $0.00 | - | |
| Michael Holder | Option exercise | Common Stock | 2,181 | - | - | |
| Michael Holder | Option exercise | Restricted Stock Units | 2,181 | $0.00 | - | |
| Allen Poirson - Officer | Option exercise | Common Stock | 790 | - | - | |
| Allen Poirson - Officer | Tax withholding / forfeiture | Common Stock | 308 | $6.03 | $2K | |
| Allen Poirson - Officer | Option exercise | Common Stock | 2,503 | - | - | |
| Allen Poirson - Officer | Tax withholding / forfeiture | Common Stock | 975 | $6.03 | $6K | |
| Allen Poirson - Officer | Option exercise | Common Stock | 1,878 | - | - | |
| Allen Poirson - Officer | Tax withholding / forfeiture | Common Stock | 732 | $6.03 | $4K | |
| Allen Poirson - Officer | Option exercise | Restricted Stock Units | 790 | $0.00 | - | |
| Allen Poirson - Officer | Option exercise | Restricted Stock Units | 2,503 | $0.00 | - | |
| Allen Poirson - Officer | Option exercise | Restricted Stock Units | 1,878 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Common Stock | 1,981 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 483 | $6.03 | $3K | |
| Ming Yan - Officer | Option exercise | Common Stock | 7,363 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 1,793 | $6.03 | $11K | |
| Ming Yan - Officer | Option exercise | Common Stock | 5,525 | - | - | |
| Ming Yan - Officer | Tax withholding / forfeiture | Common Stock | 1,346 | $6.03 | $8K | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 1,981 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 7,363 | $0.00 | - | |
| Ming Yan - Officer | Option exercise | Restricted Stock Units | 5,525 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 2,016 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 661 | $6.03 | $4K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 3,681 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 1,235 | $6.03 | $7K | |
| Valerie Barnett - Officer | Option exercise | Common Stock | 7,735 | - | - | |
| Valerie Barnett - Officer | Tax withholding / forfeiture | Common Stock | 2,603 | $6.03 | $16K | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 2,016 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 3,681 | $0.00 | - | |
| Valerie Barnett - Officer | Option exercise | Restricted Stock Units | 7,735 | $0.00 | - |
Cytek Biosciences, Inc. (CTKB) had 14 insider filings in the last 90 days, with the most recent on 2026-08-20. The full record for CTKB runs to 55 Form 4 filings, the earliest from 2024-11-20. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of CTKB were filed in the last 90 days.
No insider sales of CTKB were filed in the last 90 days.
This page tracks CTKB Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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