STOCK TITAN

Cytek Biosciences (CTKB) director awarded 18,261 options plus 33,333 RSUs

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Cytek Biosciences, Inc. director Richard Chin reported receiving new equity awards as part of his board compensation. He was granted an option for 18,261 shares of common stock at an exercise price of $4.05 per share, expiring on June 10, 2036. He also received 33,333 restricted stock units, each representing one share of common stock. Both the option and RSU award vest 100% on the earlier of June 10, 2027 or the company’s 2027 annual stockholder meeting, if that meeting is held in June 2027. These are compensation-related grants, not open-market purchases or sales.

Positive

  • None.

Negative

  • None.
Insider Chin Richard
Role null
Type Security Shares Price Value
Grant/Award Restricted Stock Units 33,333 $0.00 --
Grant/Award Director Stock Option (right to buy) 18,261 $0.00 --
Holdings After Transaction: Restricted Stock Units — 33,333 shares (Direct, null); Director Stock Option (right to buy) — 18,261 shares (Direct, null)
Footnotes (1)
  1. Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 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). 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).
Stock options granted 18,261 options Director option grant on June 10, 2026
Option exercise price $4.05 per share Director stock option strike price
Option expiration June 10, 2036 Director stock option term end date
RSUs granted 33,333 RSUs Restricted stock unit award on June 10, 2026
RSU vesting date June 10, 2027 (or 2027 meeting) Full vesting on earlier of June 10, 2027 or 2027 annual meeting in June
Shares underlying option 18,261 shares Common stock issuable upon exercise of option
Shares underlying RSUs 33,333 shares Common stock represented by RSU award
Restricted Stock Units financial
"Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
contingent right financial
"represents a contingent right to receive one share of the Issuer's common stock"
vest financial
"100% of the shares subject to the RSU Award shall vest on the earlier of June 10, 2027"
A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.
Director Stock Option financial
"Director Stock Option (right to buy)"
exercise price financial
"conversion_or_exercise_price": "4.0500""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Chin Richard

(Last)(First)(Middle)
C/O CYTEK BIOSCIENCES, INC.
47215 LAKEVIEW BOULEVARD

(Street)
FREMONT CALIFORNIA 94538

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Cytek Biosciences, Inc. [ CTKB ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/10/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)06/10/2026A33,333 (2) (2)Common Stock33,333$033,333D
Director Stock Option (right to buy)$4.0506/10/2026A18,261 (3)06/10/2036Common Stock18,261$018,261D
Explanation of Responses:
1. Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock.
2. 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).
3. 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).
/s/ Valerie Barnett, Attorney-in-Fact06/12/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did Cytek Biosciences (CTKB) director Richard Chin report?

Richard Chin reported receiving equity awards, not trading stock in the market. He was granted 18,261 stock options and 33,333 restricted stock units as director compensation, all tied to Cytek Biosciences common shares and subject to future vesting conditions.

How many Cytek Biosciences (CTKB) stock options did Richard Chin receive and at what price?

Richard Chin received an option covering 18,261 Cytek Biosciences common shares. The option has an exercise price of $4.05 per share and expires on June 10, 2036, providing a long-dated right to buy shares if the vesting conditions are satisfied.

What are the terms of Richard Chin’s restricted stock units in Cytek Biosciences (CTKB)?

He received 33,333 restricted stock units, each representing a contingent right to one Cytek Biosciences common share. These RSUs vest 100% on the earlier of June 10, 2027 or the 2027 annual stockholder meeting, provided that meeting occurs in June 2027.

When do Richard Chin’s Cytek Biosciences (CTKB) equity awards vest?

Both the stock option and RSU grant fully vest on the earlier of June 10, 2027 or the date of Cytek’s 2027 annual meeting of stockholders, if that meeting is held in June 2027. Vesting must occur before he can realize full share benefits.

Did Richard Chin buy or sell Cytek Biosciences (CTKB) shares on the open market?

The filing shows no open-market buys or sells. Instead, it reports two compensation-related acquisitions: a stock option grant and a restricted stock unit grant. Both are awarded at a recorded price of $0.00 per unit, subject to vesting terms.

How many Cytek Biosciences (CTKB) shares does each of Richard Chin’s RSUs represent?

Each restricted stock unit represents a contingent right to receive one share of Cytek Biosciences common stock. With 33,333 RSUs granted, he may receive up to 33,333 shares if all vesting conditions are met and the awards settle in shares.