Arkolith/Insider Trading/CTKB/Form 4

Jiang Wenbin

PRESIDENT AND CEO, DirectorCytek 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)8K——5.4M
May 18, 2026Tax withholding(F)2K$3.55$7K5.4M
May 18, 2026Option exercise(M)15K——5.4M
May 18, 2026Tax withholding(F)4K$3.55$13K5.4M
May 18, 2026Option exercise(M)19K——5.5M
May 18, 2026Tax withholding(F)5K$3.55$18K5.5M
May 18, 2026Option exercise(M)38K——5.5M
May 18, 2026Tax withholding(F)15K$3.55$53K5.5M

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 18, 2026Option exercise(M)8K—$039K
May 18, 2026Option exercise(M)15K—$0162K
May 18, 2026Option exercise(M)19K—$0329K
May 18, 2026Option exercise(M)38K—$0877K

Transaction Codes

M
Option exercise / conversion
F
Shares withheld for taxes

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001872873-26-000004) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML