$MKTX is held by 8 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 0.11%, with an average of 0.03% of portfolio. Largest holder: WINTON GROUP Ltd at 0.11%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.
MARKETAXESS HLDGS INC
13F holders
446
Net 13F flow · Q
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Insider buys · 90d
0
Insider net · 90d
—
Congress · 90d
1trades
Convergence
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Institutional holders
Top 10 of 446 · Source: 13F-HR01
First Financial Bankshares Inc.
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02
Primecap Management CO
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03
Nbc Securities, Inc.
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04
Siemens Fonds Invest GmbH
—
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05
Northwest Capital Management Inc
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06
Axa S.a.
—
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07
State Street
—
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08
IMS Capital Management
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09
Orrstown Financial Services Inc.
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10
Southern Style Financial, Inc.
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Each fund name links to that filer's expert page. Share counts and per-fund weights are pending the 13F ingest fix (portfolios_expertholding.units is currently mis-populated — see the same caveat on the fund detail page's holdings table). Quarter-over-quarter delta ships with the metrics pipeline.
Smart Money · top-200 alpha cohort
8 holders · Q1 202601
WINTON GROUP Ltd
0.11% NEW
α +27.0pts
02
Connor, Clark & Lunn Investment Management Ltd.
0.07% held
α +12.3pts
03
New Age Alpha Advisors, LLC
0.03% held
α +10.8pts
04
Quarry LP
0.01% held
α +10.6pts
05
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
0.00% held
α +27.5pts
06
Nisa Investment Advisors, LLC
0.00% held
α +16.6pts
07
Citigroup Inc.
0.00% held
α +26.3pts
08
Erste Asset Management GmbH
0.00% held
α +33.4pts
Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.
Insider activity · last 90 days
No insider activity
No Form 4 filings on record for $MKTX in the recent window.
Congress trades · last 90 days
3 disclosures · STOCK ActConvergence · Pattern Engine ships in v1.1
30-day windowIn development
Convergence detection for $MKTX lands with the Pattern Engine.
Once the Pattern Engine ships, this section will surface every active convergence event involving $MKTX — the institutional managers and Congress members on the same name, the 30-day window, and the combined position size.
Source data: SEC EDGAR · 13F-HR · Form 4 · CapitolTrades · Last refreshed 09:38 UTC.