Cytek Biosciences: Millennium reports 5.6% stake

The amendment lists a 4.5% reported stake for Integrated Core Strategies and 5.6% for each of three other reporting persons.

Available on EDGAR 11/03/2026 - 05:51 PM EST Accepted by SEC EDGAR 11/03/2026 - 05:51 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Cytek Biosciences, Inc. (CTKB) is the issuer whose common stock is covered by an amended beneficial-ownership report from Integrated Core Strategies (US) LLC, Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander. Integrated Core Strategies reports 5,870,954 shares (4.5%); each of the other three reports 7,281,488 shares (5.6%), with shared voting and dispositive power and zero sole voting or dispositive power. The report says securities reported for the latter three are held by entities subject to voting control and investment discretion by Millennium Management and/or other investment managers, and says the disclosure alone is not an admission of beneficial ownership. Gil Raviv, Global General Counsel, and Israel A. Englander signed the amendment.

Key Figures

Beneficially owned shares: 5,870,954 shares Reported ownership of class: 4.5% Beneficially owned shares: 7,281,488 shares +1 more

4 metrics

Beneficially owned shares 5,870,954 shares Integrated Core Strategies (US) LLC

Reported ownership of class 4.5% Integrated Core Strategies (US) LLC

Beneficially owned shares 7,281,488 shares Each of Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander

Reported ownership of class 5.6% Each of Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander

Key Terms

beneficially owned, Shared Voting Power, Shared Dispositive Power, Joint Filing Agreement

4 terms

beneficially owned regulatory

"Amount beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Shared Voting Power regulatory

"Shared Voting Power 5,870,954.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

Shared Dispositive Power regulatory

"Shared Dispositive Power 7,281,488.00"

Joint Filing Agreement regulatory

"Exhibit I: Joint Filing Agreement"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many CTKB shares did the reporting persons report owning?

Integrated Core Strategies (US) LLC reported beneficial ownership of 5,870,954 shares, or 4.5%. Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander each reported 7,281,488 shares, or 5.6%.

What voting and dispositive powers did CTKB's reporting persons report?

Each reported zero sole voting power and zero sole dispositive power. Shared voting and shared dispositive power were 5,870,954 shares for Integrated Core Strategies and 7,281,488 shares for each of the other three reporting persons. The report says the disclosure alone is not an admission of beneficial ownership for the latter three.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Cytek Biosciences, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

23285D109

(CUSIP Number)

09/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 23285D109

1

Names of Reporting Persons

Integrated Core Strategies (US) LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,870,954.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,870,954.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,870,954.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.5 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): 23285D109

1

Names of Reporting Persons

Millennium Management LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 7,281,488.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 7,281,488.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,281,488.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.6 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): 23285D109

1

Names of Reporting Persons

Millennium Group Management LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 7,281,488.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 7,281,488.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,281,488.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.6 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): 23285D109

1

Names of Reporting Persons

Israel A. Englander

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 7,281,488.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 7,281,488.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,281,488.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.6 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Cytek Biosciences, Inc.
(b)	Address of issuer's principal executive offices: 47215 Lakeview Boulevard, Fremont, California 94538
Item 2.
(a)	Name of person filing: Integrated Core Strategies (US) LLC Millennium Management LLC Millennium Group Management LLC Israel A. Englander
(b)	Address or principal business office or, if none, residence: Integrated Core Strategies (US) LLC c/o Millennium Management LLC 399 Park Avenue New York, New York 10022 Millennium Management LLC 399 Park Avenue New York, New York 10022 Millennium Group Management LLC 399 Park Avenue New York, New York 10022 Israel A. Englander c/o Millennium Management LLC 399 Park Avenue New York, New York 10022
(c)	Citizenship: Integrated Core Strategies (US) LLC - Delaware Millennium Management LLC - Delaware Millennium Group Management LLC - Delaware Israel A. Englander - United States
(d)	Title of class of securities: Common Stock, par value $0.001 per share
(e)	CUSIP No.: 23285D109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See response to Item 9 on each cover page.
(b)	Percent of class: See response to Item 11 on each cover page.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See response to Item 5 on each cover page.
	(ii) Shared power to vote or to direct the vote: See response to Item 6 on each cover page.
	(iii) Sole power to dispose or to direct the disposition of: See response to Item 7 on each cover page.
	(iv) Shared power to dispose or to direct the disposition of: See response to Item 8 on each cover page. The securities disclosed herein as potentially beneficially owned by Millennium Management LLC, Millennium Group Management LLC and Mr. Englander are held by entities subject to voting control and investment discretion by Millennium Management LLC and/or other investment managers that may be controlled by Millennium Group Management LLC (the managing member of Millennium Management LLC) and Mr. Englander (the sole voting trustee of the managing member of Millennium Group Management LLC). The foregoing should not be construed in and of itself as an admission by Millennium Management LLC, Millennium Group Management LLC or Mr. Englander as to beneficial ownership of the securities held by such entities.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Integrated Core Strategies (US) LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	11/02/2026

Millennium Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	11/02/2026

Millennium Group Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	11/02/2026

Israel A. Englander

Signature:	/s/ Israel A. Englander
Name/Title:	Israel A. Englander
Date:	11/02/2026

Comments accompanying signature: ** INTEGRATED CORE STRATEGIES (US) LLC By: Integrated Holding Group LP, its Managing Member By: Millennium Management LLC, its General Partner

Exhibit Information

Exhibit I: Joint Filing Agreement, dated as of November 2, 2026, by and among Integrated Core Strategies (US) LLC, Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander.