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Disclosery

MKTX MARKETAXESS HLDGS INC

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COM (common), issuer CIK 1278021

446 managers (454 13F filers) reported a position in MKTX shares at 2025-09-30, 35,601,202 shares in all. 61 filers opened a position and 135 filers sold out during the quarter.

Managers
446
13F filers
454
New
61
Added
160
Reduced
187
Sold out
135
Shares held by filers
35,601,202

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
VANGUARD GROUP INCgroup of 2 filers holding3,858,027$672M-505,792Timeline
PRIMECAP MANAGEMENT CO/CA/2,230,595$389M0.3%+891,30313F-HRTimeline
FMR LLCin group FMR LLC2,143,921$374M0.02%-188,22513F-HRTimelineGroup
VAN ECK ASSOCIATES CORPin group VAN ECK ASSOCIATES CORP1,948,633$340M0.32%+119,03613F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.1,850,409$322M0.01%-799,47713F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC1,798,766$315M0.19%+1,740,31613F-HRTimelineGroup
T. Rowe Price Investment Management, In…1,370,694$239M0.15%-961,29413F-HRTimeline
GUARDCAP ASSET MANAGEMENT Ltd1,361,264$237M5.5%-137,09413F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,320,657$230M0.01%-212,03913F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC951,088$166M0.11%+192,62613F-HRTimelineGroup
North Reef Capital Management LP911,358$159M7.43%+491,35813F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC830,996$145M0.01%-310,20213F-HRTimelineGroup
Burgundy Asset Management Ltd.692,216$127M1.2%+277,84613F-HRTimeline
Findlay Park Partners LLP644,700$112M1.18%-11,60013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC607,556$106M0.08%+175,37413F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY549,023$95.7M0.01%+124,21613F-HR/ATimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding538,584$93.8M+15,095Timeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP521,129$90.8M0.02%+9,70713F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS486,106$84.7M0.07%+400,69113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO447,925$78.1M<0.01%+28,88113F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp376,550$65.6M0.01%+52113F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding372,175$64.9M-14,527Timeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co315,148$54.9M0.01%-51,31913F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC310,086$54M0.04%-41,08013F-HRTimelineGroup
RDST Capital LLC281,547$49.1M4.62%+172,54213F-HR/ATimeline
Holocene Advisors, LP280,445$48.9M0.11%+203,87113F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …260,461$45.4M0.03%+10,42413F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC245,000$42.7M0.06%+54,40013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP234,464$40.9M0.01%-71,10013F-HRTimelineGroup
VOLORIDGE INVESTMENT MANAGEMENT, LLC189,772$33.1M0.11%+120,74613F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.185,618$32.3M0.03%+16,72013F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding184,950$32.2M+133,126Timeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC174,868$30.5M0.01%-19,59813F-HRTimelineGroup
Amundiin group Amundi178,394$29.9M0.01%-43,40813F-HRTimelineGroup
Baird Financial Group, Inc.in group Baird Financial Group, Inc.171,383$29.9M0.05%-54,91713F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC167,622$29.2M0.03%+70,84313F-HRTimelineGroup
BAILLIE GIFFORD & COin group BAILLIE GIFFORD & CO164,198$28.6M0.02%-22,49113F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.163,900$28.6M0.06%+108,43213F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/161,752$28.2M<0.01%-98,00013F-HR/ATimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA153,666$26.8M<0.01%-42,94213F-HRTimelineGroup
Cubist Systematic Strategies, LLC152,726$26.6M0.38%+94,68213F-HRTimeline
Public Sector Pension Investment Board145,743$25.4M0.09%+138,02913F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson145,194$25.3M0.01%+9,15713F-HRTimelineGroup
Nuveen, LLCin group TIAA134,910$23.5M0.01%-24,25713F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC133,651$23.3M<0.01%+7,30213F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL129,758$22.6M0.15%+36,60413F-HR/ATimeline
Connor, Clark & Lunn Investment Managem…126,015$22M0.07%+7,78413F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD120,400$21M0.01%+39,11113F-HRTimeline
Schonfeld Strategic Advisors LLC120,161$20.9M0.15%+87,29413F-HRTimeline
California Public Employees Retirement …116,936$20.4M0.01%-3,71113F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC115,156$20.1M0.02%+16,88513F-HRTimelineGroup
HRT FINANCIAL LP103,793$18.1M0.07%+48,47813F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc100,606$17.5M<0.01%+23,78313F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…97,704$17M0.02%+67,55413F-HRTimelineGroup
TD Asset Management Inc96,040$16.7M0.01%-79,35613F-HRTimeline
RHUMBLINE ADVISERS90,447$15.8M0.01%+13,41313F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC88,154$15.4M0.03%+69,78713F-HRTimelineGroup
Man Group plcin group Man Group plc87,103$15.2M0.03%-3,64213F-HRTimelineGroup
Sone Capital Management, LLC86,668$15.1M1.26%+48,06513F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…85,158$14.8M0.03%+69,26213F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC83,355$14.5M<0.01%+66,83713F-HRTimelineGroup
FLOSSBACH VON STORCH SE79,000$13.8M0.05%+56,00013F-HRTimeline
ALGERT GLOBAL LLC76,861$13.4M0.22%+36,37413F-HR/ATimeline
Invesco Ltd.in group Invesco Ltd.76,327$13.3M<0.01%-776,88613F-HRTimelineGroup
Freestone Grove Partners LP75,388$13.1M0.1%+73,08613F-HRTimeline
Swiss National Bank72,700$12.7M0.01%+70013F-HRTimeline
Goodman Financial Corp72,370$12.6M2.46%-1,06013F-HRTimeline
Quantbot Technologies LP70,136$12.2M0.33%new13F-HRTimeline
Qube Research & Technologies Ltd64,825$11.3M0.02%-24,95613F-HRTimeline
Prana Capital Management, LP61,323$10.7M0.36%+30,50813F-HRTimeline
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…60,000$10.5M0.02%-15,00013F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCgroup of 2 filers holding54,775$9.54M-40,902Timeline
LOS ANGELES CAPITAL MANAGEMENT LLC53,590$9.34M0.03%-2,83313F-HRTimeline
CITIGROUP INCin group CITIGROUP INC52,887$9.22M0.01%+4,63913F-HRTimelineGroup
WILSON ASSET MANAGEMENT (INTERNATIONAL)…50,190$8.75M2.16%-10,30213F-HRTimeline
ICICI Prudential Asset Management Co Ltd47,089$8.21M0.87%+9,20013F-HRTimeline
Aquatic Capital Management LLC42,032$7.32M0.14%+9,58513F-HRTimeline
DF DENT & CO INC42,006$7.32M0.09%-4,12013F-HRTimeline
Engineers Gate Manager LP42,002$7.32M0.08%-3,18613F-HRTimeline
Trexquant Investment LP40,385$7.04M0.07%-9,03113F-HRTimeline
Polar Asset Management Partners Inc.40,246$7.01M0.14%new13F-HR/ATimeline
Jump Financial, LLCin group Jump Financial, LLC39,513$6.89M0.09%+28,40513F-HR/ATimelineGroup
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co38,296$6.8M0.01%+22,18613F-HRTimelineGroup
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.38,093$6.64M0.06%+31,09313F-HRTimelineGroup
PROSPECTOR PARTNERS LLCin group PROSPECTOR PARTNERS LLC37,965$6.62M0.8%new13F-HRTimelineGroup
Gillson Capital LP37,500$6.53M0.57%new13F-HRTimeline
Bahl & Gaynor LLC36,471$6.36M0.03%-1,23613F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…36,321$6.33M0.01%-55513F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…36,218$6.31M0.01%+6,72513F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…35,931$6.26M0.01%-4013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC35,172$6.13M<0.01%-104,90813F-HR/ATimelineGroup
Natixis Investment Managersgroup of 2 filers holding35,026$6.1M-46,301Timeline
STATE OF WISCONSIN INVESTMENT BOARD34,723$6.05M0.01%-5,25713F-HRTimeline
Weiss Asset Management LPin group Weiss Asset Management LP34,404$5.99M0.09%new13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
FIRST CITIZENS BANK & TRUST CO34,267$5.97M0.13%-1,43313F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…33,942$5.91M0.08%+15,21713F-HRTimelineGroup
GUARDIAN CAPITAL LPin group GUARDIAN CAPITAL LP33,597$5.85M0.19%+7,29713F-HRTimelineGroup
IEQ CAPITAL, LLC32,662$5.69M0.02%-28,97313F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC32,267$5.62M0.03%-14,44313F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…31,949$5.57M0.01%+16,79613F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/31,594$5.51M<0.01%-27,88413F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS31,564$5.5M0.02%+2,00613F-HRTimeline
Morningstar Investment Management LLCin group Morningstar Investment Manage…30,976$5.4M0.2%new13F-HRTimelineGroup
GW&K Investment Management, LLC30,621$5.33M0.05%-113,39513F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC30,350$5.29M<0.01%+24,95013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC29,089$5.07M0.01%+1,04813F-HRTimelineGroup
CWM, LLCin group CWM, LLC26,046$4.54M0.01%+6,93413F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP25,537$4.45M<0.01%+1413F-HRTimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd24,639$4.29M0.05%+13,65313F-HRTimelineGroup
Point72 Hong Kong Ltd24,351$4.24M0.2%+17,58913F-HRTimeline
Interval Partners, LP24,194$4.22M0.09%-7,92013F-HRTimeline
SG Americas Securities, LLC24,149$4.21M0.02%-7,63813F-HRTimeline
GENEVA CAPITAL MANAGEMENT LLC24,028$4.19M0.07%+5913F-HRTimeline
State of Tennessee, Department of Treas…21,137$3.68M0.01%+12,50513F-HRTimeline
Grandeur Peak Global Advisors, LLC20,408$3.56M0.48%-4,13813F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND20,119$3.51M<0.01%-1,20013F-HRTimeline
Taylor Hoffman Capital Management LLC19,287$3.36M1.06%new13F-HRTimeline
D.A. DAVIDSON & CO.18,835$3.28M0.02%+58513F-HRTimeline
State of Alaska, Department of Revenue18,800$3.27M0.03%+14,58513F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/18,337$3.2M<0.01%-14,71313F-HRTimelineGroup
Elo Mutual Pension Insurance Co18,164$3.17M0.05%new13F-HRTimeline
ALLIANCEBERNSTEIN L.P.17,903$3.12M<0.01%-20,16513F-HRTimeline
Walleye Capital LLCgroup of 2 filers holding17,501$3.05M-182,046Timeline
Louisiana State Employees Retirement Sy…17,200$3M0.05%+15,20013F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC17,053$2.97M0.03%new13F-HRTimelineGroup
ExodusPoint Capital Management, LP16,925$2.95M0.04%new13F-HRTimeline
AGF MANAGEMENT LTDin group AGF MANAGEMENT LTD16,838$2.93M0.01%+2,52413F-HRTimelineGroup
Alamar Capital Management, LLC16,832$2.93M1.55%+8013F-HRTimeline
Treasurer of the State of North Carolina16,391$2.86M0.01%-63413F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC16,232$2.83M0.02%-15,64913F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC16,076$2.8M0.01%+3,63513F-HRTimelineGroup
Police & Firemen's Retirement System of…16,072$2.8M0.02%+2,13013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC15,483$2.7M<0.01%-471,71413F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO14,698$2.56M<0.01%-48,48213F-HRTimelineGroup
Lombard Odier Asset Management (Europe)…14,250$2.48M0.13%-10,50013F-HRTimeline
BANK OF NOVA SCOTIAgroup of 2 filers holding14,059$2.45M-95,351Timeline
VAN DEN BERG MANAGEMENT I, INC14,017$2.44M0.61%new13F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…13,973$2.43M0.01%new13F-HR/ATimelineGroup
ING GROEP NV13,700$2.39M0.01%+11,88613F-HRTimeline
LECAP ASSET MANAGEMENT LTD13,659$2.38M0.83%+5,20113F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…13,424$2.34M0.01%+26313F-HRTimeline
Gotham Asset Management, LLC13,332$2.32M0.01%+11813F-HRTimeline
Ensign Peak Advisors, Inc13,189$2.3M<0.01%-9,61313F-HR/ATimeline
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC13,098$2.28M0.01%013F-HRTimelineGroup
Assenagon Asset Management S.A.12,984$2.26M<0.01%-160,90813F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…12,917$2.25M0.01%+12813F-HRTimelineGroup
Cinctive Capital Management LP12,916$2.25M0.11%-6,35913F-HRTimeline
Focus Partners Wealthgroup of 2 filers holding12,918$2.22M+5,391Timeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…12,523$2.18M0.01%+8313F-HRTimeline
WINTON GROUP Ltdin group WINTON GROUP Ltd12,514$2.18M0.08%-1,99413F-HRTimelineGroup
CAPITAL FUND MANAGEMENT S.A.12,367$2.15M0.02%-41,02513F-HRTimeline
Mariner, LLCin group Mariner, LLC12,320$2.15M<0.01%+1,33013F-HRTimelineGroup
LRT Capital Management, LLC12,170$2.12M1.41%-3,72513F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN12,166$2.12M<0.01%-7,85513F-HRTimelineGroup
Headlands Technologies LLC12,127$2.11M0.17%+9,02213F-HRTimeline
Sanctuary Advisors, LLC12,052$2.1M0.01%-47513F-HR/ATimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC12,005$2.09M<0.01%+7,35513F-HRTimelineGroup
AMALGAMATED BANK11,720$2.04M0.01%+4,15913F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC11,707$2.04M0.02%+7,18513F-HRTimeline
Rakuten Group, Inc.group of 2 filers holding20,400$2.03MnewTimeline
Castle Hook Partners LP11,235$1.96M0.03%new13F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM11,088$1.93M0.01%+10013F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…11,481$1.93M<0.01%-2,85513F-HRTimeline
Quantinno Capital Management LP11,061$1.93M0.01%-4,37513F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…11,056$1.93M<0.01%-94313F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC10,799$1.88M0.11%+8,35113F-HRTimelineGroup
Point72 (DIFC) Ltd10,490$1.83M0.13%+8,06413F-HRTimeline
COMERICA BANK10,409$1.81M0.01%+5,24013F-HRTimeline
Oak Thistle LLC10,404$1.81M0.28%+5,65713F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP10,228$1.78M<0.01%+1,79313F-HRTimelineGroup
WALLED LAKE PLANNING & WEALTH MANAGEMEN…10,161$1.77M0.58%new13F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP9,673$1.69M0.06%+2,15113F-HR/ATimeline
Creative Planningin group Creative Planning9,670$1.69M<0.01%+6,23713F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…9,516$1.66M0.01%+31813F-HRTimeline
AlphaQuest LLC9,417$1.64M0.11%+4,46513F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …9,411$1.64M<0.01%-19,48613F-HRTimelineGroup
Handelsbanken Fonder AB9,344$1.63M0.01%013F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV9,033$1.57M<0.01%+4,12613F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.8,704$1.52M0.24%+3,68613F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND8,400$1.46M0.02%+5,16913F-HRTimeline
Stiles Financial Services Inc8,395$1.46M0.46%+38913F-HRTimeline
MATAURO, LLC8,312$1.45M0.23%new13F-HRTimeline
Horizon Investments, LLC8,205$1.43M0.02%+2,12613F-HRTimeline
CIBC WORLD MARKET INC.8,127$1.42M<0.01%+12313F-HRTimeline
Verition Fund Management LLC7,992$1.39M0.01%-53,46513F-HRTimeline
Qsemble Capital Management, LP7,919$1.38M0.14%new13F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…7,888$1.38M0.01%+5,00013F-HRTimeline
KORNITZER CAPITAL MANAGEMENT INC /KS7,874$1.37M0.03%-37,37213F-HRTimeline
KLP KAPITALFORVALTNING AS7,800$1.36M0.01%013F-HRTimeline
Point72 Asia (Singapore) Pte. Ltd.7,625$1.33M0.21%new13F-HRTimeline
AIA Group Ltdin group AIA Group Ltd7,563$1.32M0.02%-69813F-HRTimelineGroup
Elevate Capital Advisors, LLC7,315$1.27M0.89%-1,93413F-HRTimeline
Bridgefront Capital, LLC7,166$1.25M0.37%+5,43913F-HRTimeline
Maryland State Retirement & Pension Sys…7,100$1.24M0.03%+5,37413F-HRTimeline
SVB WEALTH LLC6,928$1.21M0.06%+19113F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC6,827$1.19M0.01%-26,71613F-HRTimeline
Scientech Research LLC6,573$1.15M0.4%-69413F-HRTimeline
Northwest & Ethical Investments L.P.6,553$1.14M0.03%+24013F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …6,155$1.08M<0.01%-13,57913F-HRTimelineGroup
Bangor Savings Bank6,086$1.06M0.09%-21713F-HRTimeline