MarketAxess Holdings Inc.
US ˙ NasdaqGS ˙ US57060D1081

SecurityMKTX / MarketAxess Holdings Inc.
InstitutionCreative Planning
Latest Disclosed Ownership23,074 shares
Latest Disclosed Value $ 3,806,712
Creative Planning reports 51.20% increase in ownership of MKTX / MarketAxess Holdings Inc.

On May 12, 2026 - Creative Planning filed a 13F-HR form disclosing ownership of 23,074 shares of MarketAxess Holdings Inc. (US:MKTX) valued at $3,806,749 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,261 shares of MarketAxess Holdings Inc.. This represents a change in shares of 51.20% during the quarter. The current value of the position is $2,837,641 USD.

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)
2026-05-12 2026-03-31 13F MARKETAXESS HLDGS COM 57060D108 23,074 7,813 51.20 3,807 37.60 0.0025
2026-02-17 2025-12-31 13F MARKETAXESS HLDGS COM 57060D108 15,261 5,591 57.82 2,766 64.15 0.0020
2025-11-14 2025-09-30 13F MARKETAXESS HLDGS COM 57060D108 9,670 6,237 181.68 1,685 119.97 0.0013
2025-08-08 2025-06-30 13F MARKETAXESS HLDGS COM 57060D108 3,433 1,048 43.94 767 48.45 0.0007
2025-05-15 2025-03-31 13F MARKETAXESS HLDGS COM 57060D108 2,385 393 19.73 516 14.67 0.0005
2025-02-14 2024-12-31 13F MARKETAXESS HLDGS COM 57060D108 1,992 215 12.10 450 -1.10 0.0004
2024-10-11 2024-09-30 13F MARKETAXESS HLDGS COM 57060D108 1,777 141 8.62 455 38.72 0.0005
2024-08-15 2024-06-30 13F MARKETAXESS HLDGS COM 57060D108 1,636 -282 -14.70 328 -21.90 0.0004
2024-05-13 2024-03-31 13F MARKETAXESS HLDGS COM 57060D108 1,918 -576 -23.10 420 -42.47 0.0005
2024-02-14 2023-12-31 13F MARKETAXESS HLDGS COM 57060D108 2,494 -208 -7.70 731 26.52 0.0014
2023-11-16 2023-09-30 13F MARKETAXESS HLDGS COM 57060D108 2,702 805 42.44 577 16.57 0.0008
2023-07-21 2023-06-30 13F MARKETAXESS HLDGS COM 57060D108 1,897 -101 -5.06 496 -36.62 0.0007
2023-05-15 2023-03-31 13F MARKETAXESS HLDGS COM 57060D108 1,998 -47 -2.30 782 37.02 0.0011
2023-02-10 2022-12-31 13F MARKETAXESS HLDGS COM 57060D108 2,045 241 13.36 570 42.14 0.0009
2022-11-03 2022-09-30 13F MARKETAXESS HLDGS COM 57060D108 1,804 150 9.07 401 -5.20 0.0007
2022-08-15 2022-06-30 13F MARKETAXESS HLDGS COM 57060D108 1,654 469 39.58 423 4.70 0.0007
2022-05-16 2022-03-31 13F MARKETAXESS HLDGS COM 57060D108 1,185 647 120.26 404 82.81 0.0006
2022-02-11 2021-12-31 13F MARKETAXESS HLDGS COM 57060D108 538 538 221 0.0004
2017-10-17 2017-09-30 13F MARKETAXESS HLDGS COM 57060D108 0 -263 -100.00 0 -100.00
2017-07-12 2017-06-30 13F MARKETAXESS HLDGS COM 57060D108 263 29 12.39 53 20.45 0.0003
2017-04-07 2017-03-31 13F MARKETAXESS HLDGS COM 57060D108 234 -34 -12.69 44 12.82 0.0002
2017-01-09 2016-12-31 13F MARKETAXESS HLDGS COM 57060D108 268 -127 -32.15 39 -40.00 0.0002
2016-10-12 2016-09-30 13F MARKETAXESS HLDGS COM 57060D108 395 127 47.39 65 66.67 0.0004
2016-07-12 2016-06-30 13F MARKETAXESS HLDGS COM 57060D108 268 108 67.50 39 95.00 0.0003
2016-04-08 2016-03-31 13F MARKETAXESS HLDGS COM 57060D108 160 118 280.95 20 300.00 0.0002
2016-01-11 2015-12-31 13F MARKETAXESS HLDGS COM 57060D108 42 -766 -94.80 5 -93.33 0.0000
2015-10-09 2015-09-30 13F MARKETAXESS HLDGS COM 57060D108 808 808 0.00 75 0.0007
2015-01-29 2014-12-31 13F MEASUREMENT SPECIALTIES COM 583421102 0 -255 -100.00 0 -100.00
2014-10-10 2014-09-30 13F MARKETAXESS HLDGS COM 57060D108 255 249 4,150.00 16 1,500.00 0.0002
2014-10-10 2014-09-30 13F MEASUREMENT SPECIALTIES COM 583421102 6 -249 1 11.5995
2014-08-20 2014-06-30 13F MEASUREMENT SPECIALTIES COM 583421102 6 -1,194 -99.50 1 -98.59 0.0000
2014-08-20 2014-06-30 13F MARKETAXESS HLDGS COM 57060D108 200 194 11 142.6350
2014-04-11 2014-03-31 13F MARKETAXESS HLDGS COM 57060D108 1,200 500 71.43 71 51.06 0.0011
2014-04-11 2014-03-31 13F MEASUREMENT SPECIALTIES COM 583421102 6 -1,194 0 0.0000
2014-01-06 2013-12-31 13F MARKETAXESS HLDGS COM 57060D108 700 500 250.00 47 291.67 0.0008
2014-01-06 2013-12-31 13F MEASUREMENT SPECIALTIES COM 583421102 6 -694 0 0.0000
2013-10-10 2013-09-30 13F MARKETAXESS HLDGS COM 57060D108 200 194 3,233.33 12 0.0002
2013-10-10 2013-09-30 13F MEASUREMENT SPECIALTIES COM 583421102 6 -194 0 0.0000
2013-07-09 2013-06-30 13F MEASUREMENT SPECIALTIES COM 583421102 6 6 0 0.0000
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.