CTKB · Cytek Biosciences, Inc. · Holdings

$5.51 +0.15 (+2.80%) At close · Oct 9

Russell 2000 member Rebalance outlook locked

Market Cap

$709.06M

129.98M

Volume · Oct 9 3.88M Avg daily vol (3M) 1.05M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 154

Total Value: $361,144,225

Total Shares: 81,517,924

Showing 1–100 of 154 holdings by value · page 1 of 2

Institutional Ownership Trend

21 quarters

Holder Concentration

Across 154 13F filers

Top Holder

11.8%

of institutional value

Top 5

48.5%

of institutional value

Top 10

67.3%

of institutional value

HHI

596

Broadly held

Showing 100 of 154

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

BlackRock, Inc.

$42,433,383

11.75%

9,578,643

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	58,632	$259,739	0.6%	Sole
BlackRock Asset Management Canada Ltd	795	$3,521	0.0%	Sole
BlackRock Investment Management, LLC	350,923	$1,554,588	3.7%	Sole
BLACKROCK ADVISORS LLC	266,793	$1,181,892	2.8%	Sole
BlackRock Fund Advisors	5,294,267	$23,453,602	55.3%	Sole
BlackRock Institutional Trust Company, N.A.	3,282,610	$14,541,962	34.3%	Sole
BlackRock Asset Management Ireland Ltd	158,515	$702,221	1.7%	Sole
Aperio Group, LLC	166,108	$735,858	1.7%	Sole

MILLENNIUM MANAGEMENT LLC

$41,367,384

11.45%

9,338,010

Boston Partners

$33,937,976

9.40%

7,660,943

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Boston Partners Trust Co	223,872	$991,752	2.9%	Defined
Held directly	7,437,071	$32,946,224	97.1%	Defined

HHLR ADVISORS, LTD.

$29,490,642

8.17%

6,657,030

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HILLHOUSE INVESTMENT MANAGEMENT, LTD.	6,657,030	$29,490,642	100.0%	Other

Topline Capital Management, LLC

$27,835,683

7.71%

6,283,450

VANGUARD CAPITAL MANAGEMENT LLC

$21,882,414

6.06%

4,939,597

GEODE CAPITAL MANAGEMENT, LLC

$13,553,907

3.75%

3,059,573

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	430,644	$1,907,752	14.1%	Defined
Held directly	2,628,929	$11,646,155	85.9%	Defined

DIMENSIONAL FUND ADVISORS LP

$11,590,016

3.21%

2,616,257

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	11,541	$51,126	0.4%	Defined
DFA Australia Ltd.	35,981	$159,395	1.4%	Defined
Dimensional Ireland Ltd	117,926	$522,412	4.5%	Defined
Held directly	2,450,809	$10,857,083	93.7%	Sole

STATE STREET CORP

$11,367,916

3.15%

2,566,121

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	2,566,121	$11,367,916	100.0%	Defined

GOLDMAN SACHS GROUP INC

$9,602,089

2.66%

2,167,515

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	314,551	$1,393,460	14.5%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	1,727,214	$7,651,558	79.7%	Defined
GOLDMAN SACHS INTERNATIONAL	77,353	$342,673	3.6%	Defined
Goldman Sachs Trust Company, N.A. joint	48,397	$214,398	2.2%	Other

ROYCE & ASSOCIATES LP

$9,221,394

2.55%

2,081,579

Russell Investments Group, Ltd.

$6,695,120

1.85%

1,511,315

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC joint	774,745	$3,432,118	51.3%	Defined
Russell Investments Canada Limited joint	46,481	$205,910	3.1%	Defined
Russell Investments Capital, LLC joint	169,606	$751,354	11.2%	Other
Russell Investments France SAS	100,679	$446,007	6.7%	Defined
Russell Investments Limited	13,312	$58,972	0.9%	Defined
Russell Investments Trust Company joint	406,492	$1,800,759	26.9%	Other

ACADIAN ASSET MANAGEMENT LLC

$6,095,892

1.69%

1,376,048

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	1,376,048	$6,095,892	100.0%	Defined

BANK OF AMERICA CORP /DE/

$5,826,918

1.61%

1,315,332

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	125,792	$557,258	9.6%	Defined
BOFA SECURITIES, INC.	215,102	$952,901	16.4%	Defined
MANAGED ACCOUNT ADVISORS LLC joint	974,438	$4,316,759	74.1%	Defined

VANGUARD PORTFOLIO MANAGEMENT LLC

$5,057,252

1.40%

1,141,592

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$4,754,510

1.32%

1,073,253

NORTHERN TRUST CORP

$4,444,591

1.23%

1,003,294

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	962,465	$4,263,719	95.9%	Defined
NORTHERN TRUST GLOBAL INVESTMENTS LTD	21,687	$96,073	2.2%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	19,142	$84,799	1.9%	Other

HRT FINANCIAL LP

$4,420,116

1.22%

997,769

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

$4,314,080

1.19%

973,833

JANE STREET GROUP, LLC

$4,014,296

1.11%

906,162

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	44	$194	0.0%	Defined
Jane Street Global Trading, LLC	906,118	$4,014,102	100.0%	Defined

TUDOR INVESTMENT CORP ET AL

$3,711,954

1.03%

837,913

AQR CAPITAL MANAGEMENT LLC

$3,605,890

1.00%

813,971

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	63	$279	0.0%	Other
Compound Planning, Inc.	10	$44	0.0%	Other
Arax Advisory Partners	22,722	$100,658	2.8%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	5,164	$22,876	0.6%	Other
Stokes Family Office, LLC	2,000	$8,860	0.2%	Other
Held directly	784,012	$3,473,173	96.3%	Defined

VANGUARD FIDUCIARY TRUST CO

$3,281,132

0.91%

740,662

CITADEL ADVISORS LLC

$3,196,112

0.88%

721,470

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	721,470	$3,196,112	100.0%	Defined

MORGAN STANLEY

$3,108,936

0.86%

701,792

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	6,324	$28,015	0.9%	Defined
MORGAN STANLEY & CO. LLC	34,601	$153,282	4.9%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	355,740	$1,575,928	50.7%	Defined
MORGAN STANLEY SMITH BARNEY LLC	21	$92	0.0%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	305,106	$1,351,619	43.5%	Defined

Qube Research & Technologies Ltd

$3,055,907

0.85%

689,821

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$3,019,953

0.84%

681,705

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	681,705	$3,019,953	100.0%	Other

D. E. Shaw & Co., Inc.

$2,964,475

0.82%

669,182

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	533,243	$2,362,266	79.7%	Defined
D. E. Shaw Investment Management, L.L.C. joint	135,939	$602,209	20.3%	Defined

RENAISSANCE TECHNOLOGIES LLC

$2,929,559

0.81%

661,300

FMR LLC

$2,234,424

0.62%

504,385

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	504,302	$2,234,057	100.0%	Defined
STRATEGIC ADVISERS LLC	83	$367	0.0%	Defined

MARSHALL WACE, LLP

$1,956,748

0.54%

441,704

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	441,704	$1,956,748	100.0%	Other

Point72 Asset Management, L.P.

$1,871,059

0.52%

422,361

Jain Global LLC

$1,822,789

0.50%

411,465

Bank of New York Mellon Corp

$1,645,419

0.46%

371,427

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	144,566	$640,427	38.9%	Defined
The Bank of New York Mellon	218,232	$966,767	58.8%	Defined
BNY Mellon, NA joint	8,628	$38,221	2.3%	Defined
Held directly	1	$4	0.0%	Defined

AMERICAN CENTURY COMPANIES INC

$1,294,016

0.36%

292,103

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	292,103	$1,294,016	100.0%	Defined

Nuveen, LLC

$1,282,107

0.36%

289,415

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	27,462	$121,656	9.5%	Defined
TEACHERS ADVISORS, LLC joint	261,953	$1,160,451	90.5%	Defined

Connor, Clark & Lunn Investment Management Ltd.

$1,182,535

0.33%

266,938

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	254,089	$1,125,614	95.2%	Sole
Held directly	12,849	$56,921	4.8%	Sole

JACOBS LEVY EQUITY MANAGEMENT, INC

$1,070,203

0.30%

241,581

BNP PARIBAS ARBITRAGE, SA

$952,494

0.26%

215,010

Y-Intercept (Hong Kong) Ltd

$855,557

0.24%

193,128

Invesco Ltd.

$822,521

0.23%

185,671

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	14,780	$65,475	8.0%	Defined
Invesco Trust Co joint	46,412	$205,605	25.0%	Defined
Invesco Capital Management LLC	124,479	$551,441	67.0%	Defined

TWO SIGMA INVESTMENTS, LP

$745,205

0.21%

168,218

GSA CAPITAL PARTNERS LLP

$742,436

0.21%

167,593

Numerai GP LLC

$706,429

0.20%

159,465

FRANKLIN RESOURCES INC

$691,349

0.19%

156,061

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FIDUCIARY TRUST CO INTERNATIONAL	72	$318	0.0%	Defined
FIDUCIARY TRUST INTERNATIONAL LLC	221	$979	0.1%	Defined
FRANKLIN ADVISERS INC	155,768	$690,052	99.8%	Defined

RHUMBLINE ADVISERS

$678,786

0.19%

153,225

CenterBook Partners LP

$660,867

0.18%

149,180

Jump Financial, LLC

$656,007

0.18%

148,083

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jump Trading Holdings, LLC joint	37,152	$164,583	25.1%	Defined
Leap GP LLC joint	110,931	$491,424	74.9%	Defined

XTX Topco Ltd

$632,262

0.18%

142,723

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	142,723	$632,262	100.0%	Defined

JPMORGAN CHASE & CO

$628,455

0.17%

141,864

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	55,191	$244,495	38.9%	Defined
J.P. Morgan Investment Management Inc.	85,296	$377,861	60.1%	Defined
J.P. Morgan Securities LLC	671	$2,972	0.5%	Defined
J.P. Morgan Securities plc	706	$3,127	0.5%	Defined

ALLIANCEBERNSTEIN L.P.

$624,842

0.17%

141,048

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	141,048	$624,842	100.0%	Defined

DEUTSCHE BANK AG\

$495,858

0.14%

111,932

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	111,932	$495,858	100.0%	Defined

WELLS FARGO & COMPANY/MN

$454,977

0.13%

102,704

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	101,858	$451,230	99.2%	Defined
WELLS FARGO CLEARING SERVICES, LLC	846	$3,747	0.8%	Defined

PRICE T ROWE ASSOCIATES INC /MD/

$448,307

0.12%

101,198

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	101,198	$448,307	100.0%	Defined

IEQ CAPITAL, LLC

$399,143

0.11%

90,100

UBS Group AG

$393,888

0.11%

88,914

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	648	$2,870	0.7%	Defined
UBS AG	88,266	$391,018	99.3%	Defined

PDT Partners, LLC

$384,829

0.11%

86,869

Squarepoint Ops LLC

$366,697

0.10%

82,776

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	82,776	$366,697	100.0%	Defined

Aquatic Capital Management LLC

$340,055

0.09%

76,762

VOYA INVESTMENT MANAGEMENT LLC

$327,970

0.09%

74,034

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Voya Investment Management Co. LLC joint	74,034	$327,970	100.0%	Defined

MetLife Investment Management, LLC

$304,305

0.08%

68,692

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	68,692	$304,305	100.0%	Defined

Creative Planning

$277,118

0.08%

62,555

Catalyst Funds Management Pty Ltd

$276,875

0.08%

62,500

LOS ANGELES CAPITAL MANAGEMENT LLC

$275,368

0.08%

62,160

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$274,097

0.08%

61,873

Quantinno Capital Management LP

$251,725

0.07%

56,823

CITIGROUP INC

$248,655

0.07%

56,130

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	56,130	$248,655	100.0%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$248,155

0.07%

56,017

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	56,017	$248,155	100.0%	Defined

Balyasny Asset Management L.P.

$240,907

0.07%

54,381

PRELUDE CAPITAL MANAGEMENT, LLC

$200,497

0.06%

45,259

Vanguard Global Advisers, LLC

$200,289

0.06%

45,212

CANADA PENSION PLAN INVESTMENT BOARD

$182,959

0.05%

41,300

Police & Firemen's Retirement System of New Jersey

$176,916

0.05%

39,936

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	39,936	$176,916	100.0%	Defined

Campbell & CO Investment Adviser LLC

$174,245

0.05%

39,333

ExodusPoint Capital Management, LP

$160,100

0.04%

36,140

R Squared Ltd

$156,875

0.04%

35,412

NEW YORK STATE COMMON RETIREMENT FUND

$154,704

0.04%

34,922

STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM

$153,588

0.04%

34,670

MANUFACTURERS LIFE INSURANCE COMPANY, THE

$150,464

0.04%

33,965

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MANULIFE FINANCIAL CORP joint	33,965	$150,464	100.0%	Defined

STRS OHIO

$141,760

0.04%

32,000

Cerity Partners LLC

$128,704

0.04%

29,053

AXQ CAPITAL, LP

$125,364

0.03%

28,299

Focus Partners Wealth

$124,948

0.03%

28,205

MERCER GLOBAL ADVISORS INC /ADV

$113,930

0.03%

25,718

INTECH INVESTMENT MANAGEMENT LLC

$113,554

0.03%

25,633

Arax Advisory Partners

$105,371

0.03%

23,786

PRUDENTIAL FINANCIAL INC

$103,041

0.03%

23,260

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	23,260	$103,041	100.0%	Defined

EntryPoint Capital, LLC

$101,318

0.03%

22,871

Laurion Capital Management LP

$98,625

0.03%

22,263

Quadrature Capital Ltd

$94,890

0.03%

21,420

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	21,420	$94,890	100.0%	Other

BAILARD, INC.

$88,157

0.02%

19,900

State of Tennessee, Department of Treasury

$87,753

0.02%

19,809

HSBC HOLDINGS PLC

$87,421

0.02%

19,734

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HSBC BANK PLC	19,734	$87,421	100.0%	Defined

BARCLAYS PLC

$86,854

0.02%

19,606

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	16,578	$73,440	84.6%	Defined
BARCLAYS CAPITAL INC.	3,028	$13,414	15.4%	Defined

Everhart Financial Group, Inc.

$77,253

0.02%

12,962

ProShare Advisors LLC

$70,547

0.02%

15,925

Tower Research Capital LLC (TRC)

$69,081

0.02%

15,594

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	15,594	$69,081	100.0%	Defined

ALGERT GLOBAL LLC

$65,984

0.02%

14,895

AMERIPRISE FINANCIAL INC

$62,578

0.02%

14,126

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	14,126	$62,578	100.0%	Defined

Aigen Investment Management, LP

$62,148

0.02%

14,029

Key facts CIK 1831915 CUSIP 23285D109 13F (30d) 6 filings 6 filers Visit website Investor relations