Arkolith/Insider Trading/CTKB/Form 4

Busque Philippe

SVP, GLOBAL SALES AND SERVICESCytek 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)1K——37K
May 18, 2026Tax withholding(F)263$3.55$93436K
May 18, 2026Option exercise(M)1K——38K
May 18, 2026Tax withholding(F)378$3.55$1K38K
May 18, 2026Option exercise(M)2K——40K
May 18, 2026Tax withholding(F)620$3.55$2K39K
May 18, 2026Option exercise(M)6K——45K
May 18, 2026Tax withholding(F)1K$3.55$5K43K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 18, 2026Option exercise(M)1K—$06K
May 18, 2026Option exercise(M)1K—$016K
May 18, 2026Option exercise(M)2K—$041K
May 18, 2026Option exercise(M)6K—$0128K

Transaction Codes

M
Option exercise / conversion
F
Shares withheld for taxes

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001991396-26-000002) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML