Arkolith/Insider Trading/CTKB/Form 4

Barnett Valerie

CHIEF LEGAL OFFICERCytek Biosciences, Inc. (CTKB) · full profile →Form 4 · filed May 20, 2026
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
12
8 non-derivative · 4 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
May 18, 2026Option exercise(M)2K——137K
May 18, 2026Tax withholding(F)881$3.55$3K136K
May 18, 2026Option exercise(M)5K——141K
May 18, 2026Tax withholding(F)2K$3.55$7K139K
May 18, 2026Option exercise(M)7K——147K
May 18, 2026Tax withholding(F)3K$3.55$9K144K
May 18, 2026Option exercise(M)9K——153K
May 18, 2026Tax withholding(F)3K$3.55$12K150K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 18, 2026Option exercise(M)2K—$012K
May 18, 2026Option exercise(M)5K—$057K
May 18, 2026Option exercise(M)7K—$0123K
May 18, 2026Option exercise(M)9K—$0217K

Transaction Codes

M
Option exercise / conversion
F
Shares withheld for taxes

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001873091-26-000004) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML