# MARKETAXESS HLDGS INC (MKTX) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 57060D108
Page URL: https://superinvestorclub.com/stock/MKTX
Last updated: 2026-07-08T12:48:27.847Z

## Summary

As of the most recent 13F filing period, MARKETAXESS HLDGS INC (MKTX) is held by 1 tracked superinvestors with an aggregate position value of $925,208 representing 05608 shares.

## Top institutional holders (1)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 5608 | $925,208 | 0.00% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2024-03-31: 1 holders, $7.3M aggregate, 033244 shares
- 2024-06-30: 1 holders, $12.7M aggregate, 063172 shares
- 2024-09-30: 1 holders, $9.7M aggregate, 038037 shares
- 2025-03-31: 1 holders, $875,352 aggregate, 04046 shares
- 2025-12-31: 1 holders, $2.4M aggregate, 013261 shares
- 2026-03-31: 1 holders, $925,208 aggregate, 05608 shares

## Recent congressional trades (2)

- 2025-02-12: Julie Johnson (Democrat-TX) sale $1,001 - $15,000
- 2025-01-15: Julie Johnson (Democrat-TX) purchase $1,001 - $15,000

## Recent insider transactions (0)


## Citation

When citing, use: "MARKETAXESS HLDGS INC (MKTX) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/MKTX), aggregating SEC 13F, Form 4, and congressional disclosures."