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Marketaxess Holdings Inc

MKTX
Exchange
Nasdaq
Industry
Security Brokers, Dealers & Flotation Companies
SEC CIK
0001278021

In the last 90 days, Marketaxess Holdings Inc insiders filed 0 open-market purchases and 4 sales; 397 institutions reported holding it in 13F filings for Q2 2026, worth $4.44B in total; no superinvestor holds it.

13F holders, Q3 2025

Institutional positions in Marketaxess Holdings Inc as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
452
−72 vs. Q2 2025
Shares held
35.6M
−763.0K (−2.1%) vs. Q2 2025
Total value
$6.21B
−$1.90B (−23.5%) vs. Q2 2025
New holders
64
160 more added
Sold out
136
185 more reduced

7 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MKTX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ3 2025: 452 institutions
Q1 2021: 589 institutionsQ2 2021: 551 institutionsQ3 2021: 508 institutionsQ4 2021: 505 institutionsQ1 2022: 506 institutionsQ2 2022: 505 institutionsQ3 2022: 479 institutionsQ4 2022: 500 institutionsQ1 2023: 540 institutionsQ2 2023: 514 institutionsQ3 2023: 485 institutionsQ4 2023: 506 institutionsQ1 2024: 463 institutionsQ2 2024: 468 institutionsQ3 2024: 511 institutionsQ4 2024: 519 institutionsQ1 2025: 511 institutionsQ2 2025: 531 institutionsQ3 2025: 452 institutionsQ4 2025: 487 institutionsQ1 2026: 452 institutionsQ2 2026: 397 institutions
Value heldQ3 2025: $6.21B
Q1 2021: $17.7BQ2 2021: $16.8BQ3 2021: $15.3BQ4 2021: $15.0BQ1 2022: $12.4BQ2 2022: $9.28BQ3 2022: $8.19BQ4 2022: $10.3BQ1 2023: $14.5BQ2 2023: $9.88BQ3 2023: $7.98BQ4 2023: $10.9BQ1 2024: $8.14BQ2 2024: $7.48BQ3 2024: $9.42BQ4 2024: $8.51BQ1 2025: $8.05BQ2 2025: $8.24BQ3 2025: $6.21BQ4 2025: $6.62BQ1 2026: $6.31BQ2 2026: $4.44B
Institutions holding MKTX and their total value by quarter
QuarterHoldersValue
Q2 2026397$4.44B
Q1 2026452$6.31B
Q4 2025487$6.62B
Q3 2025452$6.21B
Q2 2025531$8.24B
Q1 2025511$8.05B
Q4 2024519$8.51B
Q3 2024511$9.42B
Q2 2024468$7.48B
Q1 2024463$8.14B
Q4 2023506$10.9B
Q3 2023485$7.98B
Q2 2023514$9.88B
Q1 2023540$14.5B
Q4 2022500$10.3B
Q3 2022479$8.19B
Q2 2022505$9.28B
Q1 2022506$12.4B
Q4 2021505$15.0B
Q3 2021508$15.3B
Q2 2021551$16.8B
Q1 2021589$17.7B

Institutions, Q3 2025

Shares, value and share of portfolio for each institution holding Marketaxess Holdings Inc; share changes are against Q2 2025.

Institutions holding MKTX in Q3 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Alps Advisors Inc32,267$5.62M0.03%−14,443−30.9%Reduced
Thrivent Financial for Lutherans31,949$5.57M0.01%+16,796+110.8%Added
Price T Rowe Associates Inc31,594$5.51M0.00%−27,884−46.9%Reduced
Teacher Retirement System of Texas31,564$5.50M0.02%+2,006+6.8%Added
Envestnet Portfolio Solutions, Inc.31,477$5.48M0.02%−2,543−7.5%Reduced
Morningstar Investment Management LLC30,976$5.40M0.20%+30,976New
GW&K Investment Management, LLC30,621$5.33M0.05%−113,395−78.7%Reduced
Victory Capital Management Inc30,350$5.29M0.00%+24,950+462.0%Added
Cerity Partners LLC29,089$5.07M0.01%+1,048+3.7%Added
CWM, LLC26,046$4.54M0.01%+6,934+36.3%Added
Stifel Financial Corp25,537$4.45M0.00%+14+0.1%Added
Quadrature Capital Ltd24,639$4.29M0.05%+13,653+124.3%Added
Point72 Hong Kong Ltd24,351$4.24M0.20%+17,589+260.1%Added
Interval Partners, LP24,194$4.22M0.09%−7,920−24.7%Reduced
SG Americas Securities, LLC24,149$4.21M0.02%−7,638−24.0%Reduced
Geneva Capital Management LLC24,028$4.19M0.07%+59+0.2%Added
Envestnet Asset Management Inc23,298$4.06M0.00%−38,359−62.2%Reduced
State of Tennessee, Treasury Department21,137$3.68M0.01%+12,505+144.9%Added
Grandeur Peak Global Advisors, LLC20,408$3.56M0.48%−4,138−16.9%Reduced
New York State Common Retirement Fund20,119$3.51M0.00%−1,200−5.6%Reduced
Taylor Hoffman Capital Management LLC19,287$3.36M1.06%+19,287New
D.A. Davidson & Co.18,835$3.28M0.02%+585+3.2%Added
State of Alaska, Department of Revenue18,800$3.27M0.03%+14,585+346.0%Added
Bank of Montreal18,337$3.20M0.00%−14,713−44.5%Reduced
Elo Mutual Pension Insurance Co18,164$3.17M0.05%+18,164New
Alliancebernstein L.P.17,903$3.12M0.00%−20,165−53.0%Reduced
Louisiana State Employees Retirement System17,200$3.00M0.05%+15,200+760.0%Added
Vident Advisory, LLC17,053$2.97M0.03%+17,053New
ExodusPoint Capital Management, LP16,925$2.95M0.04%+16,925New
Agf Management Ltd16,838$2.93M0.01%+2,524+17.6%Added
Alamar Capital Management, LLC16,832$2.93M1.55%+80+0.5%Added
Treasurer of the State of North Carolina16,391$2.86M0.01%−634−3.7%Reduced
Magnetar Financial LLC16,232$2.83M0.02%−15,649−49.1%Reduced
Toroso Investments, LLC16,076$2.80M0.01%+3,635+29.2%Added
Police & Firemen's Retirement System of New Jersey16,072$2.80M0.02%+2,130+15.3%Added
American Century Companies Inc15,483$2.70M0.00%−471,714−96.8%Reduced
Walleye Capital LLC15,281$2.66M0.02%−180,046−92.2%Reduced
SEI Investments Co14,698$2.56M0.00%−48,482−76.7%Reduced
Bank of Nova Scotia14,059$2.45M0.00%−94,422−87.0%Reduced
Van Den Berg Management I, Inc14,017$2.44M0.61%+14,017New
Hudson Bay Capital Management LP13,973$2.43M0.01%+13,973New
ING Groep NV13,700$2.39M0.01%+11,886+655.2%Added
Lecap Asset Management Ltd13,659$2.38M0.83%+5,201+61.5%Added
Zurcher Kantonalbank (Zurich Cantonalbank)13,424$2.34M0.01%+263+2.0%Added
Gotham Asset Management, LLC13,332$2.32M0.01%+118+0.9%Added
Ensign Peak Advisors, Inc13,189$2.30M0.00%−9,613−42.2%Reduced
Fred Alger Management, LLC13,098$2.28M0.01%00.0%Unchanged
Assenagon Asset Management S.A.12,984$2.26M0.00%−160,908−92.5%Reduced
State of New Jersey Common Pension Fund D12,917$2.25M0.01%+128+1.0%Added
Cinctive Capital Management LP12,916$2.25M0.11%−6,359−33.0%Reduced
Public Employees Retirement System of Ohio12,523$2.18M0.01%+83+0.7%Added
Winton Group Ltd12,514$2.18M0.08%−1,994−13.7%Reduced
Capital Fund Management S.A.12,367$2.15M0.02%−41,025−76.8%Reduced
Mariner, LLC12,320$2.15M0.00%+1,330+12.1%Added
LRT Capital Management, LLC12,170$2.12M1.41%−3,725−23.4%Reduced
Wells Fargo & Company12,166$2.12M0.00%−7,855−39.2%Reduced
Headlands Technologies LLC12,127$2.11M0.17%+9,022+290.6%Added
Sanctuary Advisors, LLC12,052$2.10M0.01%−475−3.8%Reduced
Lazard Asset Management LLC12,005$2.09M0.00%+7,355+158.2%Added
Amalgamated Bank11,720$2.04M0.01%+4,159+55.0%Added
Yousif Capital Management, LLC11,707$2.04M0.02%+7,185+158.9%Added
Rakuten Investment Management, Inc.20,381$2.03M0.01%+20,381New
Castle Hook Partners LP11,235$1.96M0.03%+11,235New
Arizona State Retirement System11,088$1.93M0.01%+100+0.9%Added
Wealth Enhancement Advisory Services, LLC11,481$1.93M0.00%−2,855−19.9%Reduced
Quantinno Capital Management LP11,061$1.93M0.01%−4,375−28.3%Reduced
Russell Investments Group, Ltd.11,056$1.93M0.00%−943−7.9%Reduced
Virtu Financial LLC10,799$1.88M0.11%+8,351+341.1%Added
Point72 (DIFC) Ltd10,490$1.83M0.13%+8,064+332.4%Added
Comerica Bank10,409$1.81M0.01%+5,240+101.4%Added
Oak Thistle LLC10,404$1.81M0.28%+5,657+119.2%Added
First Trust Advisors LP10,228$1.78M0.00%+1,793+21.3%Added
Walled Lake Planning & Wealth Management, LLC10,161$1.77M0.58%+10,161New
Dark Forest Capital Management LP9,673$1.69M0.06%+2,151+28.6%Added
Creative Planning9,670$1.69M0.00%+6,237+181.7%Added
Commonwealth of Pennsylvania Public School Empls Retrmt Sys9,516$1.66M0.01%+318+3.5%Added
Quest Partners LLC9,417$1.64M0.11%+4,465+90.2%Added
Manufacturers Life Insurance Company, The9,411$1.64M0.00%−19,486−67.4%Reduced
Handelsbanken Fonder AB9,344$1.63M0.01%00.0%Unchanged
Mercer Global Advisors Inc9,033$1.57M0.00%+4,126+84.1%Added
Fox Run Management, L.L.C.8,704$1.52M0.24%+3,686+73.5%Added
Oregon Public Employees Retirement Fund8,400$1.46M0.02%+5,169+160.0%Added
Stiles Financial Services Inc8,395$1.46M0.46%+389+4.9%Added
Matauro, LLC8,312$1.45M0.23%+8,312New
Horizon Investments, LLC8,205$1.43M0.02%+2,126+35.0%Added
CIBC World Markets Inc.8,127$1.42M0.00%+123+1.5%Added
Verition Fund Management LLC7,992$1.39M0.01%−53,465−87.0%Reduced
Buckingham Strategic Partners8,140$1.39M0.02%+4,252+109.4%Added
Qsemble Capital Management, LP7,919$1.38M0.14%+7,919New
Teachers Retirement System of the State of Kentucky7,888$1.38M0.01%+5,000+173.1%Added
Kornitzer Capital Management Inc7,874$1.37M0.03%−37,372−82.6%Reduced
KLP Kapitalforvaltning AS7,800$1.36M0.01%00.0%Unchanged
Point72 Asia (Singapore) Pte. Ltd.7,625$1.33M0.21%+7,625New
AIA Group Ltd7,563$1.32M0.02%−698−8.4%Reduced
Elevate Capital Advisors, LLC7,315$1.27M0.89%−1,934−20.9%Reduced
Bridgefront Capital, LLC7,166$1.25M0.37%+5,439+314.9%Added
Maryland State Retirement & Pension System7,100$1.24M0.03%+5,374+311.4%Added
Boston Private Wealth LLC6,928$1.21M0.06%+191+2.8%Added
Intech Investment Management LLC6,827$1.19M0.01%−26,716−79.6%Reduced
Scientech Research LLC6,573$1.15M0.40%−694−9.6%Reduced