# EDGAR Filing Document

**Accession Number:** 0001831915
**File Stem:** 0001209191-23-012351
**Filing Date:** 2023-2
**Character Count:** 6351
**Document Hash:** e8ed5fd4d9d667eee870a5e720817ab3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001209191-23-012351.hdr.sgml**: 20230223

**ACCESSION NUMBER**: 0001209191-23-012351

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20220908

**FILED AS OF DATE**: 20230223

**DATE AS OF CHANGE**: 20230223

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Jeanmonod Patrik
- **CENTRAL INDEX KEY:** 0001873085

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40632
- **FILM NUMBER:** 23661613

**MAIL ADDRESS:**
- **STREET 1:** C/O CYTEK BIOSCIENCES, INC.
- **STREET 2:** 46107 LANDING PARKWAY
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538

**FORMER NAME:**
- **FORMER CONFORMED NAME:** Jeanmonod Patrick
- **DATE OF NAME CHANGE:** 20210716
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Cytek Biosciences, Inc.
- **CENTRAL INDEX KEY:** 0001831915
- **STANDARD INDUSTRIAL CLASSIFICATION:** LABORATORY ANALYTICAL INSTRUMENTS [3826]
- **IRS NUMBER:** 472547526
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 47215 LAKEVIEW BOULEVARD
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538
- **BUSINESS PHONE:** (877) 922-9835

**MAIL ADDRESS:**
- **STREET 1:** 47215 LAKEVIEW BOULEVARD
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Cytek BioSciences, Inc.
- **DATE OF NAME CHANGE:** 20201110

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Jeanmonod Patrik<br><sub>(Last) (First) (Middle)</sub><br>C/O CYTEK BIOSCIENCES, INC.<br>47215 LAKEVIEW BOULEVARD<br><sub>(Street)</sub><br>FREMONT, CA 94538<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2022-09-08 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Financial Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Cytek Biosciences, Inc. [ CTKB ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2022-09-08 |  | M |  | 40000 | A | $0.40 | 116132<sup>(1)</sup> | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Employee Stock Option (Right to Buy) | $0.40 | 2022-09-08 |  | M |  |  | 40000 | <sup>(2)</sup> | 2029-01-11 | Common Stock | 40000 | $0.00 | 202661 | D |  |

---

### Footnotes:

(1) The Forms 4 filed after the date of the option exercise reported in this Form 4 incorrectly underreported total ownership by 40,000 shares.  The number of securities beneficially owned following this option exercise is reflected as of February 17, 2022.

(2) The shares subject to the option vest as follows: 25% of the shares subject to the option vests on October 15, 2019; and 1/48th of the shares subject to the option vest monthly thereafter over the following three years.

**Signature:** /s/ Valerie Barnett, Attorney-in-Fact for Patrik Jeanmonod  
**Date:** 2023-02-23

### Remarks:

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.**