Cytek Biosciences (CTKB) holders report over 7% stakes in Schedule 13G/A

Rhea-AI Filing Summary

Cytek Biosciences, Inc. received an amended Schedule 13G/A disclosing significant ownership positions by Millennium-affiliated entities and Israel A. Englander. Integrated Core Strategies (US) LLC reports beneficial ownership of 7,162,923 shares of common stock, representing 5.5% of the class, all with shared voting and dispositive power. Millennium Management LLC, Millennium Group Management LLC, and Mr. Englander each report beneficial ownership of 9,338,010 shares, or 7.2% of the class, also solely through shared voting and dispositive power. The filing explains that the securities are held by entities subject to voting control and investment discretion of Millennium Management LLC and related managers, and it includes language that this structure should not, by itself, be construed as an admission of beneficial ownership by these reporting persons.

Key Figures

Integrated Core Strategies shares: 7,162,923 shares Integrated Core Strategies ownership: 5.5 % Millennium entities shares: 9,338,010 shares +3 more

6 metrics

Integrated Core Strategies shares 7,162,923 shares Beneficially owned Cytek Biosciences common stock; Item 9 cover page

Integrated Core Strategies ownership 5.5 % Percent of Cytek Biosciences common stock class; Item 11 cover page

Millennium entities shares 9,338,010 shares Beneficially owned Cytek Biosciences common stock; Item 9 cover pages

Millennium entities ownership 7.2 % Percent of Cytek Biosciences common stock class; Item 11 cover pages

CUSIP 23285D109 Cytek Biosciences common stock identifier listed in Item 1 and Item 2

Certification date 08/05/2026 Signature dates of reporting persons on the Schedule 13G/A amendment

Key Terms

Schedule 13G/A, beneficially owned, shared voting power, shared dispositive power, +1 more

5 terms

Schedule 13G/A regulatory

"received an amended Schedule 13G/A disclosing significant ownership positions"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: See response to Item 9 on each cover page"

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 financial

"Shared Voting Power 7,162,923.00"

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 financial

"Shared Dispositive Power 9,338,010.00"

investment discretion financial

"subject to voting control and investment discretion by Millennium Management LLC"

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

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Available on EDGAR 08/06/2026 - 07:26 PM Accepted by SEC EDGAR 08/06/2026 - 07:25 PM Learn about SEC filing dates

FAQ

What ownership stake in Cytek Biosciences (CTKB) does Integrated Core Strategies (US) LLC report?

Integrated Core Strategies (US) LLC reports beneficial ownership of 7,162,923 shares of Cytek Biosciences common stock, representing 5.5% of the outstanding class. All of these shares are reported with shared voting and shared dispositive power, and none with sole authority.

How many Cytek Biosciences (CTKB) shares do Millennium entities and Israel A. Englander report owning?

Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander each report 9,338,010 shares of Cytek Biosciences common stock, equal to 7.2% of the class. These holdings are reported entirely as shares over which they have shared voting and shared dispositive power.

Do the Millennium reporting persons have sole voting power over Cytek Biosciences (CTKB) shares?

The reporting persons disclose 0 shares with sole voting power and only shared voting power over their Cytek Biosciences holdings. They similarly report 0 shares with sole dispositive power and list their entire reported positions under shared dispositive power instead.

What does this Schedule 13G/A amendment indicate about control over CTKB shares?

The amendment states the securities are held by entities subject to voting control and investment discretion of Millennium Management LLC and related managers. It also notes this structure should not be construed, by itself, as an admission of beneficial ownership by the Millennium reporting persons.

Who are the reporting persons on this Cytek Biosciences (CTKB) Schedule 13G/A amendment?

The reporting persons are Integrated Core Strategies (US) LLC, Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander. All list the Cytek Biosciences common stock (CUSIP 23285D109) as the relevant security class.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Cytek Biosciences, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

23285D109

(CUSIP Number)

06/30/2026

(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 7,162,923.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 7,162,923.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,162,923.00

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)

5.5 %

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 9,338,010.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 9,338,010.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,338,010.00

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)

7.2 %

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 9,338,010.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 9,338,010.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,338,010.00

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)

7.2 %

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 9,338,010.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 9,338,010.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,338,010.00

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)

7.2 %

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:	08/05/2026

Millennium Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	08/05/2026

Millennium Group Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	08/05/2026

Israel A. Englander

Signature:	/s/ Israel A. Englander
Name/Title:	Israel A. Englander
Date:	08/05/2026

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 August 5, 2026, by and among Integrated Core Strategies (US) LLC, Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander.