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Disclosery

CTKB CYTEK BIOSCIENCES INC

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COMMON STOCK (common), issuer CIK 1831915

153 managers (155 13F filers) reported a position in CTKB shares at 2025-12-31, 82,031,213 shares in all. 17 filers opened a position and 15 filers sold out during the quarter.

Managers
153
13F filers
155
New
17
Added
52
Reduced
61
Sold out
15
Shares held by filers
82,031,213

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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.17,173,028$86.7M<0.01%+625,33513F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding7,487,722$37.8M+542,660Timeline
Topline Capital Management, LLC7,442,466$37.6M3.4%+498,18613F-HRTimeline
HHLR ADVISORS, LTD.in group HHLR ADVISORS, LTD.6,657,030$33.6M1.08%013F-HRTimelineGroup
Boston Partnersin group Boston Trust Walden Corp5,008,309$25.3M0.03%+4,971,12613F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC4,752,447$24M0.02%+1,334,06513F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP4,146,964$20.9M<0.01%+62,59613F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,790,574$14.1M<0.01%+7,12513F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,646,891$13.4M<0.01%-570,89713F-HRTimelineGroup
BROWN CAPITAL MANAGEMENT LLC2,072,915$10.5M0.86%-2,885,10113F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,789,914$9.04M<0.01%+52,60513F-HR/ATimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,700,985$8.59M<0.01%+237,84413F-HR/ATimelineGroup
ROYCE & ASSOCIATES LP1,692,657$8.55M0.09%-70,60513F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,094,539$5.53M<0.01%-10,48213F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…1,001,127$5.06M0.01%+841,61413F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP957,594$4.84M<0.01%-55,98913F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/856,161$4.32M<0.01%+686,00113F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…764,279$3.86M<0.01%-1,776,76713F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC743,455$3.75M<0.01%-276,43513F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC675,000$3.41M0.01%-120,54413F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC674,475$3.4M0.01%+108,90213F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC666,927$3.37M<0.01%+43,62113F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp637,929$3.22M<0.01%-35,64013F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding460,879$2.33M-7,810Timeline
HRT FINANCIAL LP437,653$2.21M0.01%new13F-HRTimeline
Invesco Ltd.in group Invesco Ltd.398,797$2.01M<0.01%+9,67113F-HRTimelineGroup
Public Sector Pension Investment Board379,274$1.92M0.01%-47,53213F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …361,677$1.83M<0.01%+38713F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO328,853$1.66M<0.01%-29,87013F-HRTimelineGroup
Simcoe Capital LLC298,461$1.51M1.42%13F-HRTimeline
Connor, Clark & Lunn Investment Managem…295,636$1.49M<0.01%-2,23913F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC284,644$1.44M<0.01%+7,65813F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC264,177$1.33M0.01%-560,25913F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.263,126$1.33M<0.01%+142,10413F-HRTimelineGroup
Nuveen, LLCin group TIAA253,808$1.28M<0.01%013F-HRTimelineGroup
RHUMBLINE ADVISERS249,940$1.26M<0.01%-30,42713F-HRTimeline
FMR LLCin group FMR LLC234,072$1.18M<0.01%+53,28613F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC202,316$1.02M<0.01%-126,30713F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc188,468$952K<0.01%-3,90713F-HRTimelineGroup
Numerai GP LLC186,764$943K0.11%+80,26913F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC183,239$925K<0.01%+17,66713F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD168,563$851K<0.01%-169,65513F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC166,754$842K<0.01%+84,45013F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.141,048$712K<0.01%-8,60013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN132,675$670K<0.01%+42,27413F-HRTimelineGroup
IEQ CAPITAL, LLC123,991$626K<0.01%-28,83213F-HRTimeline
Creative Planningin group Creative Planning121,209$612K<0.01%+12,57813F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.114,256$577K<0.01%-73,36213F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC106,857$540K<0.01%-5,81013F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS106,282$537K<0.01%+82,46613F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC97,830$494K<0.01%-18,18413F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\93,139$470K<0.01%+4,11913F-HRTimelineGroup
PDT Partners, LLC91,869$464K0.03%013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC78,758$398K<0.01%-278,26713F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…75,560$382K<0.01%-3,37413F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/69,793$353K<0.01%+7,65813F-HRTimeline
SG Americas Securities, LLC64,287$325K<0.01%+4,68313F-HRTimeline
State of Alaska, Department of Revenue61,269$308K<0.01%-24013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…57,758$292K<0.01%-12,12213F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…54,611$276K<0.01%-64413F-HRTimelineGroup
CWM, LLCin group CWM, LLC52,614$266K<0.01%-2,45213F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC51,740$261K<0.01%+3,24213F-HRTimeline
PANAGORA ASSET MANAGEMENT INC51,593$261K<0.01%-11,00513F-HRTimeline
Louisiana State Employees Retirement Sy…50,400$255K<0.01%+10013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC49,528$250K<0.01%-2,46113F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…48,463$245K<0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…48,103$243K<0.01%-144,75013F-HRTimelineGroup
CAXTON ASSOCIATES LLP45,376$229K<0.01%-48,03213F-HRTimeline
Dynamic Technology Lab Private Ltd44,274$224K0.05%+9,15513F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…35,725$202K<0.01%-65013F-HRTimeline
Quantbot Technologies LP38,533$195K0.01%+4,62613F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …35,632$180K<0.01%-5,08113F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND34,922$176K<0.01%-296,26813F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…34,670$175K<0.01%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd34,565$175K<0.01%-37,98113F-HRTimelineGroup
Focus Partners Wealthin group Focus Partners Wealth33,497$169K<0.01%-37,07913F-HRTimelineGroup
AMALGAMATED BANK32,436$164K<0.01%+50213F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding30,032$152K-207,327Timeline
Quantinno Capital Management LP29,648$150K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…29,469$149K<0.01%013F-HRTimeline
BAILARD, INC.29,300$148K<0.01%013F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC26,610$141K<0.01%-97113F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…27,223$137K<0.01%-64113F-HRTimeline
STRS OHIO26,200$132K<0.01%013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND25,175$127K<0.01%+50013F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…24,338$123K<0.01%013F-HRTimeline
COMERICA BANK23,997$121K<0.01%-2,79513F-HRTimeline
ProShare Advisors LLC22,733$115K<0.01%+72913F-HRTimeline
State of Tennessee, Department of Treas…22,900$114K<0.01%-35,98313F-HRTimeline
CITIGROUP INCin group CITIGROUP INC22,163$112K<0.01%-27,81013F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV21,726$110K<0.01%-813F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC27,420$105K<0.01%new13F-HRTimeline
AXQ CAPITAL, LP19,124$96.6K0.02%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC18,565$93.7K<0.01%-8,33713F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC17,628$89K<0.01%-2,80513F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…16,337$82.5K<0.01%-98713F-HRTimelineGroup
Maryland State Retirement & Pension Sys…15,656$79.1K<0.01%new13F-HRTimeline
NorthCrest Asset Manangement, LLC14,289$74.4K<0.01%+713F-HRTimeline
CAPTRUST FINANCIAL ADVISORS14,047$70.9K<0.01%-1,23113F-HRTimeline
Pallas Capital Advisors LLC13,953$70.5K<0.01%-45213F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC13,400$67.7K<0.01%new13F-HRTimeline
State of Wyoming13,022$65.8K0.01%+2,26813F-HRTimeline
Everhart Financial Group, Inc.12,962$65.5K0.01%013F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…12,568$63.5K<0.01%+31213F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC12,404$62.6K<0.01%new13F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources10,357$52.3K<0.01%-76,41113F-HRTimelineGroup
M&T Bank Corpin group M&T Bank Corp10,257$51.8K<0.01%new13F-HR/ATimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…9,823$49.6K<0.01%013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…7,237$36.5K<0.01%-1,56413F-HRTimeline
Sterling Capital Management LLC6,822$34.5K<0.01%-1,29113F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA5,525$28K<0.01%+1,40313F-HRTimelineGroup
Caitong International Asset Management …5,144$26K0.01%+2,38813F-HR/ATimeline
SBI Securities Co., Ltd.5,010$25.3K<0.01%+2,50013F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.4,579$23.1K<0.01%+23113F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC3,653$18.4K<0.01%-1,22713F-HRTimeline
Pinnacle Wealth Planning Services, Inc.3,488$17.6K<0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,238$16.4K<0.01%-4,63713F-HRTimelineGroup
SIMPLEX TRADING, LLC2,003$10.1K<0.01%+1,31813F-HRTimeline
Essential Partners LLC1,934$9.77K<0.01%-44213F-HRTimeline
Private Wealth Management Group, LLC1,694$8.55K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1,579$7.97K<0.01%-20613F-HRTimelineGroup
GROUP ONE TRADING LLC1,500$7.58K<0.01%new13F-HRTimeline
UMB Bank, n.a.1,382$6.98K<0.01%+45113F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Allworth Financial LP1,049$5.3K<0.01%+5213F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…1,026$5.18K<0.01%+85113F-HR/ATimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…912$4.61K<0.01%+5213F-HRTimelineGroup
IFP Advisors, Inc710$3.59K<0.01%013F-HRTimeline
True Wealth Design, LLC613$3.1K<0.01%-20413F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC593$3K<0.01%+28113F-HRTimelineGroup
GAMMA Investing LLC517$2.61K<0.01%new13F-HRTimeline
Salomon & Ludwin, LLC460$2.4K<0.01%+18113F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\454$2.29K<0.01%013F-HRTimelineGroup
SIGNATUREFD, LLC438$2.21K<0.01%013F-HRTimeline
Versant Capital Management, Inc435$2.2K<0.01%013F-HRTimeline
Aquatic Capital Management LLC306$1.54K<0.01%-83,84413F-HRTimeline
ROTHSCHILD INVESTMENT LLC276$1.39K<0.01%+1113F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP254$1.28K<0.01%013F-HRTimelineGroup
Prestige Wealth Management Group LLC240$1.21K<0.01%013F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.289$1K<0.01%new13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Parkside Financial Bank & Trust193$976<0.01%+12713F-HRTimeline
Smartleaf Asset Management LLC127$640<0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.117$591<0.01%+9713F-HRTimelineGroup
Farther Finance Advisors, LLC95$480<0.01%013F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…60$303<0.01%013F-HRTimelineGroup
Larson Financial Group LLC54$273<0.01%new13F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.26$131<0.01%new13F-HRTimelineGroup
Clearstead Advisors, LLC24$122<0.01%-1,05113F-HRTimeline
Cedar Mountain Advisors, LLC21$106<0.01%new13F-HRTimeline
Ankerstar Wealth, LLC14$71<0.01%13F-HRTimeline
Arax Advisory Partners12$61<0.01%-30,24713F-HRTimeline
GILPIN WEALTH MANAGEMENT, LLC9$46<0.01%13F-HRTimeline
Keating Financial Advisory Services, In…2$10<0.01%13F-HRTimeline
Covestor Ltd21$00%013F-HRTimelineValue filed as zero, left out of ratios.