Who Owns Marketaxess Holdings Inc
Every manager with more than $100m in listed equities files a 13F each quarter naming what they hold. These are the ones reporting a position in Marketaxess Holdings Inc.
Who crossed 5% of MKTX →Positions as of 2026-09-30
Largest first. The move is against the previous quarter that manager filed, not the previous calendar quarter.
| Manager | Value |
|---|---|
| Investors Research CorpCOM1.3K shadded | $208.5K |
| GAMMA Investing LLCCommon Stock1.2K shadded | $193.9K |
| Farther Finance Advisors, LLCStock580 shheld | $95.1K |
| MassMutual Private Wealth & Trust, FSBCommon / Ordinary Stock153 shadded | $25.1K |
| Bangor Savings BankCOM22 shtrimmed | $3.6K |
| ELEVATION WEALTH PARTNERS, LLCCOM17 shadded | $2.8K |
| CoreCap Advisors, LLCStock9 shadded | $1.5K |
| AMERICAN NATIONAL BANK & TRUSTCOM7 sh— | $1.1K |
| GILPIN WEALTH MANAGEMENT, LLCCOM5 shadded | $820 |
| Marquette Asset Management, LLCCOM4 shtrimmed | $656 |
| Davis Capital ManagementStock2 shheld | $328 |
Source: quarterly 13F filings, via EDGAR. A 13F reports positions by CUSIP alone; each CUSIP here has been confirmed against OpenFIGI rather than matched by name, because a name match would attribute one company's shareholders to another. Positions are as of quarter end and can be months old by the time they are filed, and 13F covers long equity positions only — not shorts, and not most debt. The summed value is what these filers reported, not the company's institutional ownership.
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