MarketAxess Holdings Inc.
MX ˙ BMV ˙ US57060D1081
SecurityMX:MKTX / MarketAxess Holdings Inc.
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership7,753 shares
Latest Disclosed Value $ 1,279,090
Baird Financial Group, Inc. reports 59.92% decrease in ownership of MKTX / MarketAxess Holdings Inc.

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 7,753 shares of MarketAxess Holdings Inc. (MX:MKTX) valued at $1,279,090 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 19,344 shares of MarketAxess Holdings Inc.. This represents a change in shares of -59.92% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F MARKETAXESS HLDGS COM 57060D108 7,753 -11,591 -59.92 1,279 -63.52 0.0020
2026-02-13 2025-12-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 19,344 -152,039 -88.71 3,506 -88.26 0.0055
2025-11-13 2025-09-30 13F MARKETAXESS HLDGS COMMON 57060D108 171,383 -54,917 -24.27 29,863 -40.91 0.0480
2025-08-13 2025-06-30 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 226,300 -2,556 -1.12 50,542 2.08 0.0886
2025-05-15 2025-03-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 228,856 15,921 7.48 49,513 2.87 0.0953
2025-02-14 2024-12-31 13F MARKETAXESS HLDGS COMMON 57060D108 212,935 -18,450 -7.97 48,132 -18.81 0.0921
2024-11-14 2024-09-30 13F MARKETAXESS HLDGS COMMON 57060D108 231,385 16,745 7.80 59,281 37.73 0.1151
2024-08-14 2024-06-30 13F MARKETAXESS HLDGS COMMON 57060D108 214,640 2,768 1.31 43,042 -7.34 0.0893
2024-05-14 2024-03-31 13F MARKETAXESS HLDGS COMMON 57060D108 211,872 -16,608 -7.27 46,453 -30.58 0.0974
2024-02-14 2023-12-31 13F MARKETAXESS HLDGS COMMON 57060D108 228,480 42,832 23.07 66,910 68.70 0.1525
2023-11-13 2023-09-30 13F MARKETAXESS HLDGS COMMON 57060D108 185,648 30,008 19.28 39,662 -2.52 0.1082
2023-08-11 2023-06-30 13F MARKETAXESS HLDGS COMMON 57060D108 155,640 20,941 15.55 40,687 -22.80 0.1074
2023-05-15 2023-03-31 13F MARKETAXESS HLDGS COMMON 57060D108 134,699 86,593 180.00 52,706 405,330.77 0.1300
2023-02-13 2022-12-31 13F MARKETAXESS HLDGS COMMON 57060D108 48,106 -683 -1.40 13 -99.88 0.0353
2022-11-15 2022-09-30 13F MARKETAXESS HLDGS COMMON 57060D108 48,789 39,581 429.85 10,855 360.35 0.0320
2022-08-08 2022-06-30 13F MARKETAXESS HLDGS COMMON 57060D108 9,208 -31,043 -77.12 2,358 -82.78 0.0065
2022-05-13 2022-03-31 13F MARKETAXESS HLDGS COMMON 57060D108 40,251 338 0.85 13,696 -16.56 0.0338
2022-02-09 2021-12-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 39,913 30,988 347.20 16,414 337.24 0.0384
2021-11-12 2021-09-30 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 8,925 437 5.15 3,754 -4.60 0.0096
2021-08-11 2021-06-30 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 8,488 -97,569 -92.00 3,935 -92.55 0.0102
2021-05-13 2021-03-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 106,057 -6,077 -5.42 52,807 -17.46 0.1481
2021-02-11 2020-12-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 112,134 -31,391 -21.87 63,977 -7.44 0.1913
2020-11-12 2020-09-30 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 143,525 -2,917 -1.99 69,120 -5.77 0.2368
2020-10-22 2020-06-30 13F/A-1 MARKETAXESS HLDGS INC COM COMMON 57060D108 146,442 -14,001 -8.73 73,356 37.64 0.2763
2020-08-14 2020-06-30 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 113,319 -47,124 44,680 88,545.6088
2020-05-14 2020-03-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 160,443 40,846 34.15 53,296 17.55 0.2434
2020-02-14 2019-12-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 119,597 5,180 4.53 45,340 21.00 0.1628
2019-11-14 2019-09-30 13F MARKETAXESS HOLDINGS Common 57060D108 114,417 -16,710 -12.74 37,472 -11.09 0.1476
2019-08-14 2019-06-30 13F MARKETAXESS HOLDINGS COMMON 57060D108 131,127 -44,538 -25.35 42,146 -2.50 0.1639
2019-05-14 2019-03-31 13F MARKETAXESS HLDGS COMMON 57060D108 175,665 4,969 2.91 43,228 19.84 0.2528
2019-02-14 2018-12-31 13F MARKETAXESS HLDGS COMMON 57060D108 170,696 11,672 7.34 36,070 30.44 0.2448
2018-11-13 2018-09-30 13F MARKETAXESS HLDGS COMMON 57060D108 159,024 1,042 0.66 27,653 -11.53 0.1733
2018-08-13 2018-06-30 13F MARKETAXESS HLDGS COMMON 57060D108 157,982 28,037 21.58 31,258 10.63 0.2122
2018-05-14 2018-03-31 13F MARKETAXESS HLDGS COMMON 57060D108 129,945 8,321 6.84 28,255 15.15 0.1989
2018-02-09 2017-12-31 13F MARKETAXESS HLDGS COMMON 57060D108 121,624 -1,764 -1.43 24,538 7.78 0.1738
2017-11-14 2017-09-30 13F MARKETAXESS HLDGS COMMON 57060D108 123,388 20,464 19.88 22,766 9.99 0.1717
2017-08-14 2017-06-30 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 102,924 -2,478 -2.35 20,698 4.74 0.1622
2017-06-19 2017-03-31 13F/A-1 MARKETAXESS HLDGS INC COM COMMON 57060D108 105,402 -348 -0.33 19,762 27.19 0.1598
2017-05-09 2017-03-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 105,402 19,762
2017-02-10 2016-12-31 13F MARKETAXESS HLDGS INC COM COMMON 57060D108 105,750 105,750 15,537 0.1349
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.