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Disclosery

CTKB CYTEK BIOSCIENCES INC

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COMMON STOCK (common), issuer CIK 1831915

151 managers (153 13F filers) reported a position in CTKB shares at 2025-09-30, 80,000,481 shares in all. 19 filers opened a position and 24 filers sold out during the quarter.

Managers
151
13F filers
153
New
19
Added
62
Reduced
53
Sold out
24
Shares held by filers
80,000,481

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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.16,547,693$57.4M<0.01%-487,84213F-HRTimelineGroup
Focus Partners Wealthin group Focus Partners Wealth70,576$31.2M0.05%new13F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding6,945,062$24.1M-832,471Timeline
Topline Capital Management, LLC6,944,280$24.1M4.14%+1,713,02013F-HRTimeline
HHLR ADVISORS, LTD.in group HHLR ADVISORS, LTD.6,657,030$23.1M0.56%013F-HRTimelineGroup
BROWN CAPITAL MANAGEMENT LLC4,958,016$17.2M0.71%-2,151,97913F-HRTimeline
STATE STREET CORPin group STATE STREET CORP4,084,368$14.2M<0.01%-89,39513F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC3,418,382$11.9M0.01%+2,493,61013F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP3,217,788$11.2M<0.01%-237,01813F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,783,449$9.66M<0.01%+53,85613F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…2,541,046$8.82M<0.01%new13F-HRTimelineGroup
ROYCE & ASSOCIATES LP1,763,262$6.12M0.06%+373,45613F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,737,309$6.03M<0.01%+720,75213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,463,141$5.08M<0.01%+313,02013F-HR/ATimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,105,021$3.83M<0.01%+195,43113F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC1,019,890$3.54M<0.01%-218,50313F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP1,013,583$3.52M<0.01%-82,41113F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC824,436$2.86M0.01%-63,90313F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC795,544$2.76M<0.01%-267,59513F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp673,569$2.34M<0.01%-26,34413F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC623,306$2.16M<0.01%+50,91913F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC565,573$1.96M<0.01%+251,92913F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding468,689$1.63M-447,713Timeline
Public Sector Pension Investment Board426,806$1.48M0.01%+77,07013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.389,126$1.35M<0.01%+45,46713F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …361,290$1.25M<0.01%+217,03813F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO358,723$1.24M<0.01%-71,38513F-HR/ATimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC357,025$1.24M<0.01%+72,18713F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD338,218$1.17M<0.01%+21,54213F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND331,190$1.15M<0.01%-1,757,20013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC328,623$1.14M<0.01%-83,68813F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…297,875$1.03M<0.01%-21,19113F-HRTimeline
RHUMBLINE ADVISERS280,367$973K<0.01%-2,28413F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC276,986$961K<0.01%+25,71313F-HRTimelineGroup
Nuveen, LLCin group TIAA253,808$881K<0.01%013F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL249,812$867K0.01%new13F-HR/ATimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding237,359$824KnewTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…192,853$669K<0.01%-18,74713F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc192,375$668K<0.01%-117,91613F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.187,618$651K<0.01%new13F-HRTimelineGroup
FMR LLCin group FMR LLC180,786$627K<0.01%-24,95513F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/170,160$590K<0.01%+78,54813F-HR/ATimelineGroup
BARCLAYS PLCin group BARCLAYS PLC165,572$575K<0.01%-222,33613F-HR/ATimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…159,513$554K<0.01%+131,71813F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC158,641$550K<0.01%+13,59013F-HRTimelineGroup
Cubist Systematic Strategies, LLC156,359$543K0.01%+59,51513F-HRTimeline
IEQ CAPITAL, LLC152,823$530K<0.01%+14,06213F-HRTimeline
ALLIANCEBERNSTEIN L.P.149,648$519K<0.01%-2,20013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP134,286$466K<0.01%-127,06613F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.121,022$420K<0.01%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC116,014$403K<0.01%+77,70213F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC112,667$391K<0.01%013F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP109,098$379K0.03%+73,93213F-HRTimeline
Creative Planningin group Creative Planning108,631$377K<0.01%+52,95413F-HRTimelineGroup
Numerai GP LLC106,495$370K0.05%-315,82313F-HRTimeline
CAXTON ASSOCIATES LLP93,408$324K0.01%-10,05713F-HRTimeline
PDT Partners, LLC91,869$319K0.02%013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN90,401$314K<0.01%+14,95013F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\89,020$309K<0.01%+11,97213F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources86,768$301K<0.01%+10,18013F-HRTimelineGroup
Aquatic Capital Management LLC84,150$292K0.01%+63,90013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC82,304$286K<0.01%-534,78113F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…81,106$281K<0.01%+12,20013F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…78,934$274K<0.01%+3,49513F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd72,546$252K0.01%-42,85513F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…69,880$242K<0.01%-3,41813F-HRTimelineGroup
ExodusPoint Capital Management, LP62,970$219K<0.01%-171,72713F-HRTimeline
PANAGORA ASSET MANAGEMENT INC62,598$217K<0.01%-225,66413F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/62,135$216K<0.01%+5,31413F-HRTimeline
State of Alaska, Department of Revenue61,509$213K<0.01%+55613F-HRTimeline
SG Americas Securities, LLC59,604$207K<0.01%+46,95613F-HRTimeline
State of Tennessee, Department of Treas…58,883$204K<0.01%+34,17313F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…55,255$192K<0.01%-9,13513F-HRTimelineGroup
CWM, LLCin group CWM, LLC55,066$191K<0.01%+9,64613F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC51,989$180K<0.01%+62713F-HRTimelineGroup
Louisiana State Employees Retirement Sy…50,300$175K<0.01%+2,40013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC49,973$173K<0.01%-59,67013F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC48,498$168K<0.01%+1,55613F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…48,463$168K<0.01%013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…47,480$165K<0.01%-7,64213F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …40,713$141K<0.01%-3,72813F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…36,375$138K<0.01%+5,30813F-HRTimeline
OXFORD ASSET MANAGEMENT LLP37,509$130K0.04%+24,83613F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Boston Partnersin group Boston Trust Walden Corp37,183$129K<0.01%new13F-HRTimelineGroup
Dynamic Technology Lab Private Ltd35,119$122K0.02%-10,59513F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…34,670$120K<0.01%013F-HRTimeline
Quantbot Technologies LP33,907$118K<0.01%+9,17613F-HRTimeline
AMALGAMATED BANK31,934$111K<0.01%+2,00313F-HRTimeline
Arax Advisory Partners30,259$105K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…29,469$102K<0.01%013F-HRTimeline
BAILARD, INC.29,300$102K<0.01%new13F-HRTimeline
Brooklyn Investment Group28,452$101K0.01%-2,21213F-HR/ATimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…27,864$96.7K<0.01%+1,52413F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC27,581$95.7K<0.01%-3,62113F-HRTimeline
Mariner, LLCin group Mariner, LLC26,902$93.3K<0.01%+9,66313F-HRTimelineGroup
COMERICA BANK26,792$93K<0.01%-3,62113F-HRTimeline
STRS OHIO26,200$90.9K<0.01%013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND24,675$85.6K<0.01%+1,20013F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…24,338$85K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS23,816$82.6K<0.01%+11,83813F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC23,379$81.1K0.01%new13F-HRTimeline
ProShare Advisors LLC22,004$76.4K<0.01%-3,96613F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV21,734$75.4K<0.01%new13F-HRTimeline
Point72 (DIFC) Ltd20,489$71.1K<0.01%+12,30813F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC20,433$70.9K<0.01%-85213F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…17,324$60.1K<0.01%+84613F-HRTimelineGroup
NorthCrest Asset Manangement, LLC14,282$54.1K<0.01%-97613F-HRTimeline
CAPTRUST FINANCIAL ADVISORS15,278$53K<0.01%+2,57413F-HRTimeline
Pallas Capital Advisors LLC14,405$50K<0.01%+33613F-HRTimeline
Everhart Financial Group, Inc.12,962$45K<0.01%013F-HRTimeline
CIBC Bancorp USA Inc.group of 2 filers holding12,533$43.5K+12,379Timeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…12,256$42.5K<0.01%-92313F-HRTimelineGroup
Point72 Asia (Singapore) Pte. Ltd.11,198$38.9K0.01%-20,39713F-HRTimeline
CIBC Asset Management Inc11,100$38.5K<0.01%013F-HRTimeline
State of Wyoming10,754$37.3K<0.01%+1,21613F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…9,823$34.1K<0.01%-2,21913F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…8,801$30.5K<0.01%-96,38413F-HRTimeline
Sterling Capital Management LLC8,113$28.2K<0.01%+4,92113F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…7,875$27.3K<0.01%-11,88513F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC4,880$16.9K<0.01%+32713F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.4,348$15.1K<0.01%-2,87313F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA4,122$15K<0.01%-18,32613F-HRTimelineGroup
Caitong International Asset Management …2,756$9.56K0.01%new13F-HRTimeline
SBI Securities Co., Ltd.2,510$8.71K<0.01%-1013F-HRTimeline
Essential Partners LLC2,376$8.24K<0.01%+62413F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1,785$6.19K<0.01%+513F-HRTimelineGroup
Private Wealth Management Group, LLC1,694$5.88K<0.01%013F-HRTimeline
Clearstead Advisors, LLC1,075$3.73K<0.01%+44813F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.1,036$3.6K<0.01%new13F-HRTimelineGroup
Allworth Financial LP997$3.46K<0.01%+68013F-HRTimeline
UMB Bank, n.a.931$3.23K<0.01%+6713F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…860$2.98K<0.01%-83613F-HRTimelineGroup
True Wealth Design, LLC817$2.83K<0.01%-3213F-HRTimeline
IFP Advisors, Inc710$2.46K<0.01%+10213F-HR/ATimeline
SIMPLEX TRADING, LLC685$2K<0.01%+47013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\454$1.57K<0.01%-17,35413F-HRTimelineGroup
SIGNATUREFD, LLC438$1.52K<0.01%+3413F-HRTimeline
Versant Capital Management, Inc435$1.51K<0.01%+28413F-HRTimeline
Salomon & Ludwin, LLC279$1.11K<0.01%new13F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC312$1K<0.01%new13F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC265$920<0.01%+11513F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP254$864<0.01%013F-HRTimelineGroup
Prestige Wealth Management Group LLC240$833<0.01%new13F-HR/ATimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…175$607<0.01%new13F-HRTimelineGroup
Farther Finance Advisors, LLC95$330<0.01%-4,77613F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK81$281<0.01%013F-HRTimelineGroup
Parkside Financial Bank & Trust66$230<0.01%013F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…60$208<0.01%013F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.20$82<0.01%013F-HRTimelineGroup
Sunbelt Securities, Inc.12$42<0.01%new13F-HRTimeline
Covestor Ltd21$00%013F-HRTimelineValue filed as zero, left out of ratios.