Vera Imper - 10 Jun 2026 Form 4 Insider Report for Cytek Biosciences, Inc. (CTKB)

Reporting relationship: Director
Issuer ticker: CTKB
Reported as of: 10 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 12 Jun 2026, 19:25:57 UTC
Prior SEC filing: 20 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ Valerie Barnett, Attorney-in-Fact

Key filing fact

Vera Imper filed Form 4 for Cytek Biosciences, Inc. (CTKB) on 12 Jun 2026.

Key facts

This page summarizes Vera Imper's Form 4 filing for Cytek Biosciences, Inc. (CTKB).
4 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 12 Jun 2026, 19:25.

Change

Previous filing in this sequence was filed on 20 Jun 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001902959 Primary reporting owner

Imper Vera

Relationship: Director
Address: C/O CYTEK BIOSCIENCES, INC., 47215 LAKEVIEW BOULEVARD, FREMONT
Signature: /s/ Valerie Barnett, Attorney-in-Fact
Signature date: 12 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CTKB transaction

Common Stock

Options Exercise

Transaction value
Shares: +43,973
Change %: +280%
Price
Shares after: 59,679
Date: 10 Jun 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CTKB transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +33,333
Change %
Price: $0.000000^*
Shares after: 33,333
Date: 10 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 33,333
Exercise price
Footnotes: F1, F2

CTKB transaction Derivative

Director Stock Option (right to buy)

Award

Transaction value
Shares: +18,261
Change %
Price: $0.000000^*
Shares after: 18,261
Date: 10 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 18,261
Exercise price: $4.05
Footnotes: F3

CTKB transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -43,973
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 10 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 43,973
Exercise price
Footnotes: F1, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock.

Footnote F2

100% of the shares subject to the RSU Award shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027).

Footnote F3

100% of the shares subject to the option shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027).

Footnote F4

100% of the shares subject to the RSU Award vested on June 10, 2026.