Cytek Biosciences, Inc. (CTKB) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-06-16

Cytek Biosciences, Inc. (CTKB) has filed 14 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-16. 5 Form 8-K material event filings were reported by CTKB in the last 90 days. InsiderAlpha tracks every CTKB SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Cytek Biosciences, Inc. (CTKB)

SEC CIK0001831915

90-Day SEC Filing Activity

Form 4 filings (90d)14
Form 8-K filings (90d)5
Latest Form 4 filing2026-06-16

Recent CTKB Insider Transactions (Form 4)

DateInsiderRoleTransactionSharesPriceValueFiling
Yan MingCHIEF TECHNOLOGY OFFICERG — Bona-fide gift135.9K$0.00—SEC
NEFF DEBORAH JInsiderM — Option exercise44.0K——SEC
Holder MichaelInsiderM — Option exercise44.0K——SEC
Ball JackInsiderM — Option exercise44.0K——SEC
Imper VeraInsiderM — Option exercise44.0K——SEC
Yan MingCHIEF TECHNOLOGY OFFICERF — Tax withholding / forfeiture919$3.55$3KSEC
Yan MingCHIEF TECHNOLOGY OFFICERM — Option exercise4.9K——SEC
Yan MingCHIEF TECHNOLOGY OFFICERM — Option exercise4.1K——SEC
Barnett ValerieCHIEF LEGAL OFFICERF — Tax withholding / forfeiture1.9K$3.55$7KSEC
Barnett ValerieCHIEF LEGAL OFFICERM — Option exercise5.2K——SEC
Barnett ValerieCHIEF LEGAL OFFICERM — Option exercise9.4K——SEC
Barnett ValerieCHIEF LEGAL OFFICERF — Tax withholding / forfeiture3.4K$3.55$12KSEC
Yan MingCHIEF TECHNOLOGY OFFICERF — Tax withholding / forfeiture1.2K$3.55$4KSEC
Yan MingCHIEF TECHNOLOGY OFFICERM — Option exercise3.7K——SEC
Barnett ValerieCHIEF LEGAL OFFICERM — Option exercise7.2K——SEC

All transactions sourced from SEC EDGAR Form 4 filings for Cytek Biosciences, Inc. (CTKB). Updated in real time as new filings are submitted to the SEC.

Most-Active CTKB Insiders — Last 90 Days

InsiderForm 4 filingsTotal transaction value
Yan Ming13$20K
Busque Philippe12$10K
Jiang Wenbin12$91K
Barnett Valerie12$31K
McCombe William D.9$33K

Recent CTKB Form 8-K Material Events

Recent Insider Filings

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in CTKB insider filings:

POpen-market purchase by the insider
SOpen-market sale by the insider
AGrant, award, or other acquisition from the issuer
MExercise or conversion of derivative security (e.g. options)
FPayment of exercise price or tax liability via share withholding
GBona-fide gift of securities
DDisposition to the issuer (e.g. share buyback participation)
JOther acquisition or disposition
XExercise of in-the-money or at-the-money derivative security
CConversion of derivative security
VTransaction voluntarily reported earlier than required

CTKB Insider Trading — FAQ

What is the latest insider trade for CTKB?
Cytek Biosciences, Inc. (CTKB) had 14 insider filings in the last 90 days, with the most recent on 2026-06-16. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying CTKB stock?
0 insider purchases of CTKB were filed in the last 90 days.
How many insiders are selling CTKB stock?
0 insider sales of CTKB were filed in the last 90 days.
Where can I see CTKB SEC filings (Form 4, 10-K, 10-Q, 8-K)?
InsiderAlpha aggregates every CTKB SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

Open the live CTKB dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.