11 institutions reported holding $2.4M of MARKETAXESS HLDGS INC (MKTX) in SEC 13F filings for 2026-06-30. Largest institutional holders: Assenagon Asset Management S.A. ($1.7M), Hennion & Walsh Asset Management, Inc. ($449,307), GAMMA Investing LLC ($132,897), Versant Capital Management, Inc ($44,375), MassMutual Private Wealth & Trust, FSB ($13,505). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | $1.7M | 15,366 | Trimmed |
| 2 | Hennion & Walsh Asset Management, Inc. | $449,307 | 3,959 | Trimmed |
| 3 | GAMMA Investing LLC | $132,897 | 1,171 | Trimmed |
| 4 | Versant Capital Management, Inc | $44,375 | 391 | Added |
| 5 | MassMutual Private Wealth & Trust, FSB | $13,505 | 119 | Trimmed |
| 6 | Bangor Savings Bank | $3,064 | 27 | Trimmed |
| 7 | CoreCap Advisors, LLC | $567 | 5 | New |
| 8 | CX Institutional | $0 | 0 | Exited |
| 9 | Dogwood Wealth Management LLC | $0 | 0 | Exited |
| 10 | ELEVATION WEALTH PARTNERS, LLC | $0 | 0 | Exited |
| 11 | Cedar Mountain Advisors, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30