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Disclosery

CTKB CYTEK BIOSCIENCES INC

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COMMON STOCK (common), issuer CIK 1831915

151 managers (155 13F filers) reported a position in CTKB shares at 2026-06-30, 81,520,227 shares in all. 28 filers opened a position and 37 filers sold out during the quarter.

Managers
151
13F filers
155
New
28
Added
45
Reduced
65
Sold out
37
Shares held by filers
81,520,227

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.9,578,643$42.4M<0.01%-7,428,62613F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC9,338,010$41.4M0.03%+3,046,21213F-HRTimelineGroup
Boston Partnersin group Boston Trust Walden Corp7,660,943$33.9M0.03%+1,858,17013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 5 filers holding6,867,063$30.4M-988,988Timeline
HHLR ADVISORS, LTD.in group HHLR ADVISORS, LTD.6,657,030$29.5M3.54%013F-HRTimelineGroup
Topline Capital Management, LLC6,283,450$27.8M7.22%-781,03113F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC3,059,573$13.6M<0.01%+225,61813F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,616,257$11.6M<0.01%-47,07213F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP2,566,121$11.4M<0.01%-1,557,62713F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC2,167,515$9.6M<0.01%-177,22013F-HRTimelineGroup
ROYCE & ASSOCIATES LP2,081,579$9.22M0.07%+439,21113F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…1,511,315$6.7M0.01%+151,41513F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC1,376,048$6.09M0.01%+977,06013F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/1,315,332$5.83M<0.01%+306,27813F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,073,253$4.75M<0.01%-31,34813F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP1,003,294$4.44M<0.01%-1,89913F-HRTimelineGroup
HRT FINANCIAL LP997,769$4.42M0.01%+583,71713F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …973,833$4.31M<0.01%+653,92413F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC906,162$4.01M<0.01%new13F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL837,913$3.71M0.02%+517,19813F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC813,971$3.61M<0.01%-98,37113F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC721,470$3.2M<0.01%+250,07813F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY701,792$3.11M<0.01%-1,017,08313F-HRTimelineGroup
Qube Research & Technologies Ltd689,821$3.06M<0.01%new13F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…681,705$3.02M<0.01%+625,69513F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.669,182$2.96M<0.01%+409,05713F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC661,300$2.93M<0.01%-15,40013F-HRTimeline
FMR LLCin group FMR LLC504,385$2.23M<0.01%+220,99913F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP441,704$1.96M<0.01%new13F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.422,361$1.87M<0.01%new13F-HRTimelineGroup
Jain Global LLC411,465$1.82M0.02%new13F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp371,427$1.65M<0.01%-237,22013F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC292,103$1.29M<0.01%+10,42213F-HRTimelineGroup
Nuveen, LLCin group TIAA289,415$1.28M<0.01%+43,89413F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…266,938$1.18M<0.01%+25,43413F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC241,581$1.07M<0.01%-15,71113F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS215,010$952K<0.01%+136,96613F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd193,128$856K0.02%new13F-HRTimeline
Invesco Ltd.in group Invesco Ltd.185,671$823K<0.01%-202,56213F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP168,218$745K<0.01%+142,61813F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP167,593$742K0.05%+58,47713F-HRTimeline
Numerai GP LLC159,465$706K0.06%+47,00513F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources156,061$691K<0.01%+42,08813F-HRTimelineGroup
RHUMBLINE ADVISERS153,225$679K<0.01%-101,36413F-HRTimeline
CenterBook Partners LP149,180$661K0.03%-580,69413F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC148,083$656K0.01%+119,19113F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd142,723$632K0.01%new13F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.141,048$616K<0.01%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO141,864$616K<0.01%-157,22613F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\111,932$496K<0.01%+7,49513F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN102,704$455K<0.01%+57,42713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/101,198$449K<0.01%+21,05613F-HRTimeline
IEQ CAPITAL, LLC90,100$399K<0.01%-54,29213F-HRTimeline
UBS Group AGgroup of 2 filers holding89,496$396K-97,967Timeline
PDT Partners, LLC86,869$385K0.02%013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC82,776$367K<0.01%+57,48013F-HRTimelineGroup
Aquatic Capital Management LLC76,762$340K0.01%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC74,034$328K<0.01%-67,35113F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…68,692$304K<0.01%+4,17513F-HRTimelineGroup
Creative Planningin group Creative Planning62,555$277K<0.01%-27,38213F-HRTimelineGroup
Catalyst Funds Management Pty Ltd62,500$277K0.02%new13F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC62,160$275K<0.01%new13F-HRTimeline
Quantinno Capital Management LP56,823$252K<0.01%+5,61113F-HRTimeline
CITIGROUP INCin group CITIGROUP INC56,130$249K<0.01%+43,67613F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…56,017$248K<0.01%+87213F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management54,381$241K<0.01%new13F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…61,873$222K<0.01%-10,82713F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC45,259$200K0.01%+32,05913F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD41,300$183K<0.01%013F-HRTimeline
Police & Firemen's Retirement System of…39,936$177K<0.01%+10,46713F-HRTimeline
Campbell & CO Investment Adviser LLC39,333$174K0.01%new13F-HRTimeline
ExodusPoint Capital Management, LP36,140$160K<0.01%new13F-HRTimeline
R Squared Ltd35,412$157K0.08%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND34,922$155K<0.01%013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…34,670$154K<0.01%013F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …33,965$150K<0.01%+1,76613F-HRTimelineGroup
STRS OHIO32,000$142K<0.01%+5,80013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC29,053$129K<0.01%-29,07013F-HRTimelineGroup
AXQ CAPITAL, LP28,299$125K0.01%+8,59113F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth28,205$125K<0.01%-5,47213F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV25,718$114K<0.01%-3,39713F-HR/ATimeline
INTECH INVESTMENT MANAGEMENT LLC25,633$114K<0.01%+413F-HRTimeline
Arax Advisory Partners23,786$105K<0.01%+23,56513F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC23,260$103K<0.01%-94,33713F-HRTimelineGroup
EntryPoint Capital, LLC22,871$101K0.02%new13F-HRTimeline
Laurion Capital Management LP22,263$98.6K0.01%new13F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd21,420$94.9K<0.01%new13F-HRTimelineGroup
BAILARD, INC.19,900$88.2K<0.01%013F-HRTimeline
State of Tennessee, Department of Treas…19,809$87.8K<0.01%-3,09113F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC19,606$86.9K<0.01%-4,53713F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC19,734$85.7K<0.01%new13F-HRTimelineGroup
ProShare Advisors LLC15,925$70.5K<0.01%-2,29113F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…15,594$69.1K<0.01%+5,35413F-HRTimelineGroup
ALGERT GLOBAL LLC14,895$66K<0.01%-27,66513F-HRTimeline
NorthCrest Asset Manangement, LLC13,923$63.9K<0.01%-1,29313F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC14,126$62.6K<0.01%-173,14413F-HRTimelineGroup
Aigen Investment Management, LP14,029$62.1K0.02%new13F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC13,655$60.5K<0.01%-3,96613F-HRTimeline
SG Americas Securities, LLC13,056$58K<0.01%-21,55013F-HRTimeline
CAPTRUST FINANCIAL ADVISORS13,068$57.9K<0.01%-3,36613F-HRTimeline
Everhart Financial Group, Inc.12,962$57.4K<0.01%013F-HRTimeline
CAXTON ASSOCIATES LLP11,931$52.9K<0.01%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc11,810$52.3K<0.01%-171,05013F-HRTimelineGroup
XPONANCE LLC11,573$51.3K<0.01%+98013F-HRTimeline
AE Wealth Management LLC11,512$51K<0.01%-2,68113F-HRTimeline
Pallas Capital Advisors LLC11,269$49.9K<0.01%-2,19513F-HRTimeline
TWO SIGMA SECURITIES, LLC11,180$49.5K<0.01%new13F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…10,438$46.2K<0.01%new13F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…9,823$43.5K<0.01%013F-HRTimelineGroup
Quantbot Technologies LP6,536$29K<0.01%new13F-HRTimeline
State of Alaska, Department of Revenue6,456$28K<0.01%-54,81313F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.6,078$26.9K<0.01%+74313F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA4,375$19K<0.01%+2,07613F-HRTimelineGroup
Caitong International Asset Management …3,322$14.7K<0.01%-17,47213F-HRTimeline
SBI Securities Co., Ltd.3,010$13.3K<0.01%-2,00013F-HRTimeline
Integrated Wealth Concepts LLC2,813$12.5K<0.01%new13F-HRTimeline
Sterling Capital Management LLC2,451$10.9K<0.01%-1,46813F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…2,418$10.7K<0.01%-2,78113F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…2,022$8.96K<0.01%-15,90513F-HRTimelineGroup
Private Wealth Management Group, LLC1,694$7.5K<0.01%013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…1,647$7.3K<0.01%-4,71513F-HR/ATimeline
Essential Partners LLC1,531$6.78K<0.01%-1,05113F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…1,452$6.43K<0.01%-23,45713F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1,221$5.41K<0.01%-60013F-HRTimelineGroup
Allworth Financial LP1,181$5.23K<0.01%-20913F-HRTimeline
GAMMA Investing LLC989$4.38K<0.01%-64213F-HRTimeline
Global Retirement Partners, LLC932$4.13K<0.01%13F-HRTimeline
UMB Bank, n.a.833$3.69K<0.01%-57213F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
BESSEMER GROUP INCin group BESSEMER GROUP INC593$3K<0.01%013F-HRTimelineGroup
IFP Advisors, Inc597$2.65K<0.01%-38913F-HRTimeline
True Wealth Design, LLC569$2.52K<0.01%-14213F-HRTimeline
NISA INVESTMENT ADVISORS, LLC558$2.47K<0.01%-3,19613F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\536$2.37K<0.01%-2113F-HRTimelineGroup
Versant Capital Management, Inc515$2.28K<0.01%-2,22013F-HRTimeline
Larson Financial Group LLC435$1.93K<0.01%-3613F-HRTimeline
ROTHSCHILD INVESTMENT LLC299$1.32K<0.01%-9513F-HRTimeline
Salomon & Ludwin, LLC279$1.28K<0.01%-2,42213F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP254$1.14K<0.01%013F-HRTimelineGroup
GROUP ONE TRADING LLC250$1.11K<0.01%-1,95013F-HRTimeline
Prestige Wealth Management Group LLC240$1.06K<0.01%013F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.133$1K<0.01%-45413F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.185$819<0.01%-95713F-HRTimelineGroup
Farther Finance Advisors, LLC145$641<0.01%-3113F-HRTimeline
Fortitude Family Office, LLC115$509<0.01%new13F-HRTimeline
Plante Moran Financial Advisors, LLC73$323<0.01%new13F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…60$266<0.01%013F-HRTimelineGroup
Clearstead Advisors, LLC47$209<0.01%new13F-HRTimeline
SIGNATUREFD, LLC34$151<0.01%-40413F-HRTimeline
Davis Capital Management12$53<0.01%new13F-HRTimeline
GILPIN WEALTH MANAGEMENT, LLC9$40<0.01%-413F-HRTimeline
Covestor Ltd71$00%+5013F-HRTimelineValue filed as zero, left out of ratios.