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

Keep exploring

Connected pages for Cytek Biosciences, Inc.

Build

Ask your agent about CTKB insider filings

This filing is the Follow view. The Build view lets your agent pull every Form 4 for the issuer, the net open-market picture over 90 days, and the accession behind each row, through REST or MCP.

Get a key Compare plansForm 4 data
Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/filing/0001873091-26-000004"
Ask your agent
Use Arkolith to summarize insider buying and selling at Cytek Biosciences, Inc.
over the last 90 days and cite the filings.