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MarketAxess Holdings Inc. (MKTX) institutional ownership

Latest close $112.27 Jul 21, 2026
Market cap$6.6B 52-week range SectorFinancial Services
Funds holding · Q1 2026
467
reported MKTX position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Net bought $300M
232 buyers · 235 sellers

MarketAxess Holdings Inc. (MKTX) price and institutional activity

Dates

Q1 2026

$1.0B bought by 232 investors
Millennium Management LLC$138MNeuberger Berman Group LLC$73M +230 more
$710M sold by 235 investors
Citadel Advisors LLC-$95MGuardcap Asset Management Ltd-$89M +233 more
Bought Sold Totals per quarter; hover a bar for the names.

MarketAxess Holdings Inc. (MKTX) institutional activity · 467

Investor Type Est. change Change Δ Own Date
Millennium Management LLC · Added +$138M
Change +786K Date Q1 2026
Millennium Management LLC Added· Q1 2026 +$138M +786K Q1 2026
Citadel Advisors LLC Reduced· Q1 2026 −$95M −543K −86.9% Q1 2026
Guardcap Asset Management Ltd · Reduced −$89M
Change −510K Date Q1 2026
Guardcap Asset Management Ltd Reduced· Q1 2026 −$89M −510K Q1 2026
Norges · Exited −$88M
Change −504K Δ Own −100.0% Date Q1 2026
Norges Exited· Q1 2026 −$88M −504K −100.0% Q1 2026
FMR LLC · Reduced −$85M
Change −485K Δ Own −24.2% Date Q1 2026
FMR LLC Reduced· Q1 2026 −$85M −485K −24.2% Q1 2026
Neuberger Berman Group LLC · Added +$73M
Change +416K Date Q1 2026
Neuberger Berman Group LLC Added· Q1 2026 +$73M +416K Q1 2026
Goldman Sachs Group Inc · Added +$59M
Change +336K Date Q1 2026
Goldman Sachs Group Inc Added· Q1 2026 +$59M +336K Q1 2026
BlackRock · Added +$58M
Change +329K Date Q1 2026
BlackRock Added· Q1 2026 +$58M +329K Q1 2026
North Reef Capital Management LP · Added +$47M
Change +266K Date Q1 2026
North Reef Capital Management LP Added· Q1 2026 +$47M +266K Q1 2026
Point72 Asset Management, L.P. · New +$44M
Change +253K Date Q1 2026
Point72 Asset Management, L.P. New· Q1 2026 +$44M +253K Q1 2026
Driehaus Capital Management LLC · New +$42M
Change +239K Date Q1 2026
Driehaus Capital Management LLC New· Q1 2026 +$42M +239K Q1 2026
Amundi · Added +$40M
Change +230K Date Q1 2026
Amundi Added· Q1 2026 +$40M +230K Q1 2026
Vanguard · Added +$39M
Change +220K Date Q1 2026
Vanguard Added· Q1 2026 +$39M +220K Q1 2026
Primecap Management Co · Added +$30M
Change +172K Date Q1 2026
Primecap Management Co Added· Q1 2026 +$30M +172K Q1 2026
Two Sigma Advisers, LP · Exited −$30M
Change −172K Δ Own −100.0% Date Q1 2026
Two Sigma Advisers, LP Exited· Q1 2026 −$30M −172K −100.0% Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 467

Famous investor activity in MarketAxess Holdings Inc. (MKTX)

MarketAxess Holdings Inc. (MKTX) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Pintoff Scott · Officer Sell −$12K
Price $115.12 Qty −100 Owned 12K ΔOwn −0.8% Trade date Jul 10, 2026 Filed date Jul 10, 2026
Pintoff Scott Officer Sell $115.12 −100 −$12K 12K −0.8% Jul 10, 2026 Jul 10, 2026
Hernandez Carlos Mauricio · Director 2 operations 0
Owned 2K Trade date Jun 18, 2026 Filed date Jun 18, 2026
Hernandez Carlos Mauricio Director 2 operations 0 2K Jun 18, 2026 Jun 18, 2026
Altobello Nancy A. · Director Grant (A) 1K
Owned 5K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Altobello Nancy A. Director Grant (A) 1K 5K Jun 10, 2026 Jun 12, 2026
Pintoff Scott · Officer Sell −$12K
Price $116.03 Qty −100 Owned 12K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Pintoff Scott Officer Sell $116.03 −100 −$12K 12K Jun 10, 2026 Jun 12, 2026
Cifu Douglas A. · Director Grant (A) 1K
Owned 2K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Cifu Douglas A. Director Grant (A) 1K 2K Jun 10, 2026 Jun 12, 2026
Ketchum Richard G. · Director Grant (A) 1K
Owned 6K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Ketchum Richard G. Director Grant (A) 1K 6K Jun 10, 2026 Jun 12, 2026
Portney Emily Hope · Director Grant (A) 1K
Owned 2K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Portney Emily Hope Director Grant (A) 1K 2K Jun 10, 2026 Jun 12, 2026
Schiciano Kenneth T. · Director Grant (A) 1K
Owned 2K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Schiciano Kenneth T. Director Grant (A) 1K 2K Jun 10, 2026 Jun 12, 2026
Chwick Jane · Director Grant (A) 1K
Owned 10K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Chwick Jane Director Grant (A) 1K 10K Jun 10, 2026 Jun 12, 2026
Begleiter Steven L. · Director Grant (A) 1K
Owned 12K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Begleiter Steven L. Director Grant (A) 1K 12K Jun 10, 2026 Jun 12, 2026
Gibson Kourtney · Director Grant (A) 1K
Owned 5K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Gibson Kourtney Director Grant (A) 1K 5K Jun 10, 2026 Jun 12, 2026
Hernandez Carlos Mauricio · Director Grant (A) 3K
Owned 13K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Hernandez Carlos Mauricio Director Grant (A) 3K 13K Jun 10, 2026 Jun 12, 2026
Hoornweg Roberto · Director Grant (A) 1K
Owned 2K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Hoornweg Roberto Director Grant (A) 1K 2K Jun 10, 2026 Jun 12, 2026
Cruger William Frank Jr · Director Grant (A) 1K
Owned 10K Trade date Jun 10, 2026 Filed date Jun 12, 2026
Cruger William Frank Jr Director Grant (A) 1K 10K Jun 10, 2026 Jun 12, 2026
Fiszel Bieler Ilene · CFO Tax withholding or exercise payment (F) -$41K
Price $123.18 Qty -332 Owned 9K Trade date Jun 3, 2026 Filed date Jun 3, 2026
Fiszel Bieler Ilene CFO Tax withholding or exercise payment (F) $123.18 -332 -$41K 9K Jun 3, 2026 Jun 3, 2026
15 of 46
15 of 46 Sign in to continue to older insider transactions.

MarketAxess Holdings Inc. (MKTX) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Vanguard Group Inc 4.5M
% of shares outstanding 11.9% Filing date Feb 13, 2024
Vanguard Group Inc 4.5M 11.9% Feb 13, 2024
BlackRock Inc. 3.2M
% of shares outstanding 8.4% Filing date Jan 25, 2024
BlackRock Inc. 3.2M 8.4% Jan 25, 2024
Vanguard Portfolio Management 2.2M
% of shares outstanding 6.1% Filing date Apr 29, 2026
Vanguard Portfolio Management 2.2M 6.1% Apr 29, 2026
T. Rowe Price Investment Management, Inc. 2.1M
% of shares outstanding 5.5% Filing date Nov 14, 2024
T. Rowe Price Investment Management, Inc. 2.1M 5.5% Nov 14, 2024
Vanguard Capital Management 1.9M
% of shares outstanding 5.3% Filing date Apr 30, 2026
Vanguard Capital Management 1.9M 5.3% Apr 30, 2026
North Reef Capital Management LP 1.9M
% of shares outstanding 5.3% Filing date May 15, 2026
North Reef Capital Management LP 1.9M 5.3% May 15, 2026
Guardian Capital LP 1.9M
% of shares outstanding 5.0% Filing date Feb 14, 2024
Guardian Capital LP 1.9M 5.0% Feb 14, 2024
FMR LLC 1.5M
% of shares outstanding 4.2% Filing date May 6, 2026
FMR LLC 1.5M 4.2% May 6, 2026
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MarketAxess Holdings Inc. (MKTX) ownership FAQ

Who owns MKTX?

467 reporting institutions disclosed MKTX position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.