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Cytek Biosciences, Inc. (CTKB)

Cytek Biosciences, Inc. (CTKB) Insider Trading

Directors, officers and holders of more than 10% of CTKB report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 459 transactions on file: 0 with code P, 0 with code S and 50 with other codes.

DateInsiderCodeShares
Aug 18, 2026Yan MingF Tax Payment3,463
Aug 18, 2026Yan MingF Tax Payment1,501
Aug 18, 2026Holder MichaelM Exercise2,181
Aug 18, 2026Yan MingM Exercise5,525
Aug 18, 2026Jiang WenbinF Tax Payment2,869
Aug 18, 2026Jiang WenbinM Exercise22,100
Aug 18, 2026Yan MingM Exercise7,363
Aug 18, 2026Yan MingM Exercise6,162
Aug 18, 2026Chin RichardM Exercise6,107
Aug 18, 2026Jiang WenbinF Tax Payment20,956
Aug 18, 2026Jiang WenbinM Exercise29,002
Aug 18, 2026Jiang WenbinM Exercise22,100
Aug 18, 2026McCombe William D.M Exercise13,051
Aug 18, 2026Jiang WenbinM Exercise29,002
Aug 18, 2026McCombe William D.M Exercise6,320
Aug 18, 2026McCombe William D.M Exercise13,051
Aug 18, 2026Yan MingF Tax Payment1,346
Aug 18, 2026Yan MingM Exercise5,525
Aug 18, 2026Jiang WenbinM Exercise11,781
Aug 18, 2026MUIR GLENN PM Exercise3,086
Aug 18, 2026Jiang WenbinF Tax Payment5,382
Aug 18, 2026Jiang WenbinM Exercise57,212
Aug 18, 2026McCombe William D.M Exercise16,049
Aug 18, 2026Holder MichaelM Exercise2,181
Aug 18, 2026MUIR GLENN PM Exercise3,086
Aug 18, 2026Jiang WenbinM Exercise11,781
Aug 18, 2026Jiang WenbinM Exercise57,212
Aug 18, 2026Yan MingM Exercise14,220
Aug 18, 2026Chin RichardM Exercise6,107
Aug 18, 2026Jiang WenbinF Tax Payment7,062
Aug 18, 2026Yan MingM Exercise6,162
Aug 18, 2026McCombe William D.F Tax Payment4,392
Aug 18, 2026McCombe William D.M Exercise6,320
Aug 18, 2026McCombe William D.F Tax Payment2,111
Aug 18, 2026McCombe William D.M Exercise16,049
Aug 18, 2026Yan MingM Exercise7,363
Aug 18, 2026McCombe William D.F Tax Payment5,401
Aug 18, 2026Yan MingF Tax Payment1,778
Aug 18, 2026Yan MingM Exercise14,220
Aug 10, 2026Feuchtwang IlanA Award241,416
Aug 10, 2026Feuchtwang IlanA Award127,118
Jun 12, 2026Yan MingG Gift135,892
Jun 10, 2026Imper VeraM Exercise43,973
Jun 10, 2026Imper VeraA Award18,261
Jun 10, 2026MUIR GLENN PA Award55,555
Jun 10, 2026NEFF DEBORAH JM Exercise43,973
Jun 10, 2026NEFF DEBORAH JA Award18,261
Jun 10, 2026Imper VeraA Award33,333
Jun 10, 2026MUIR GLENN PA Award29,835
Jun 10, 2026Chin RichardA Award33,333

The full Form 4 history is on the CTKB company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.