Key facts
- This page summarizes Jack Ball's Form 4 filing for Cytek Biosciences, Inc. (CTKB).
- 2 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 12 Jun 2026, 19:34.
Jack Ball - 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, 19:34:18 UTC
- Prior SEC filing
- 20 Jun 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Valerie Barnett, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Jack Ball filed Form 4 for Cytek Biosciences, Inc. (CTKB) on 12 Jun 2026.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001873083
Primary reporting owner
Ball Jack
- Relationship
- Director
- Address
- C/O CYTEK BIOSCIENCES, INC., 47215 LAKEVIEW BLVD., 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 %
- +103%
- Price
- Shares after
- 86,678
- 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
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, F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Section 16 status
Jack Ball is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.
Explanation of responses 2 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 vested on June 10, 2026.