MarketAxess 控股公司
MX ˙ BMV ˙ US57060D1081
SecurityMX:MKTX / MarketAxess Holdings Inc.
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership269 shares
Latest Disclosed Value $ 44,380
Asset Management One Co., Ltd. reports 42.40% decrease in ownership of MKTX / MarketAxess Holdings Inc.

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 269 shares of MarketAxess Holdings Inc. (MX:MKTX) valued at $44,380 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 467 shares of MarketAxess Holdings Inc.. This represents a change in shares of -42.40% 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)
2026-05-08 2026-03-31 13F MARKETAXESS HLDGS COM 57060D108 269 -198 -42.40 44 -48.24 0.0001
2026-01-27 2025-12-31 13F MARKETAXESS HLDGS COM 57060D108 467 -241 -34.04 86 -30.89 0.0002
2025-10-22 2025-09-30 13F MARKETAXESS HLDGS COM 57060D108 708 -1,315 -65.00 123 -72.73 0.0004
2025-07-31 2025-06-30 13F MARKETAXESS HLDGS COM 57060D108 2,023 409 25.34 452 29.23 0.0014
2025-04-23 2025-03-31 13F MARKETAXESS HLDGS COM 57060D108 1,614 -13,655 -89.43 349 -90.02 0.0012
2025-01-30 2024-12-31 13F MARKETAXESS HLDGS COM 57060D108 15,269 -162 -1.05 3,497 -11.54 0.0120
2024-10-30 2024-09-30 13F MARKETAXESS HLDGS COM 57060D108 15,431 50 0.33 3,953 28.18 0.0141
2024-07-18 2024-06-30 13F MARKETAXESS HLDGS COM 57060D108 15,381 -667 -4.16 3,084 -12.34 0.0118
2024-05-02 2024-03-31 13F MARKETAXESS HLDGS COM 57060D108 16,048 -827 -4.90 3,519 -29.67 0.0136
2024-01-24 2023-12-31 13F MARKETAXESS HLDGS COM 57060D108 16,875 904 5.66 5,002 46.60 0.0201
2023-10-19 2023-09-30 13F MARKETAXESS HLDGS COM 57060D108 15,971 -72 -0.45 3,412 -18.63 0.0152
2023-07-31 2023-06-30 13F MARKETAXESS HLDGS COM 57060D108 16,043 113 0.71 4,194 -32.73 0.0178
2023-04-25 2023-03-31 13F MARKETAXESS HLDGS COM 57060D108 15,930 1,739 12.25 6,233 55.13 0.0283
2023-02-06 2022-12-31 13F MARKETAXESS HLDGS COM 57060D108 14,191 -1,503 -9.58 4,018 15.10 0.0196
2022-11-04 2022-09-30 13F MARKETAXESS HLDGS COM 57060D108 15,694 -64 -0.41 3,491 -13.46 0.0178
2022-07-29 2022-06-30 13F MARKETAXESS HLDGS COM 57060D108 15,758 -557 -3.41 4,034 -27.34 0.0189
2022-05-13 2022-03-31 13F MARKETAXESS HLDGS COM 57060D108 16,315 -506 -3.01 5,552 -19.76 0.0217
2022-02-09 2021-12-31 13F MARKETAXESS HLDGS COM 57060D108 16,821 -548 -3.16 6,919 -5.32 0.0241
2021-11-02 2021-09-30 13F MARKETAXESS HLDGS COM 57060D108 17,369 -115 -0.66 7,308 -9.87 0.0280
2021-08-03 2021-06-30 13F MARKETAXESS HLDGS COM 57060D108 17,484 -666 -3.67 8,108 -10.27 0.0302
2021-05-14 2021-03-31 13F MARKETAXESS HLDGS COM 57060D108 18,150 -428 -2.30 9,036 -13.90 0.0359
2021-02-12 2020-12-31 13F MARKETAXESS HLDGS COM 57060D108 18,578 -179 -0.95 10,495 16.19 0.0432
2020-11-13 2020-09-30 13F MARKETAXESS HLDGS COM 57060D108 18,757 -2,382 -11.27 9,033 -14.69 0.0415
2020-08-14 2020-06-30 13F MARKETAXESS HLDGS COM 57060D108 21,139 2,086 10.95 10,588 67.06 0.0521
2020-05-14 2020-03-31 13F MARKETAXESS HLDGS COM 57060D108 19,053 82 0.43 6,338 -11.87 0.0370
2020-02-14 2019-12-31 13F MARKETAXESS HLDGS COM 57060D108 18,971 -70 -0.37 7,192 15.37 0.0324
2019-11-14 2019-09-30 13F MARKETAXESS HLDGS COM 57060D108 19,041 -105 -0.55 6,234 1.33 0.0300
2019-08-14 2019-06-30 13F MARKETAXESS HLDGS COM 57060D108 19,146 17,946 1,495.50 6,152 1,985.42 0.0302
2019-05-15 2019-03-31 13F MARKETAXESS HLDGS COM 57060D108 1,200 0 0.00 295 18.47 0.0016
2019-02-13 2018-12-31 13F MARKETAXESS HLDGS COM 57060D108 1,200 600 100.00 249 132.71 0.0006
2018-11-14 2018-09-30 13F MARKETAXESS HLDGS COM 57060D108 600 600 107 0.0002
2017-05-02 2016-12-31 13F/A-1 MARKETAXESS HOLDINGS COM 57060D108 0 -31,864 -100.00 0 -100.00
2016-11-07 2016-09-30 13F MARKETAXESS HOLDINGS COM 57060D108 31,864 -5,228 -14.09 5,293 0.47 0.0786
2016-08-03 2016-06-30 13F MARKETAXESS HOLDINGS Com 57060D108 37,092 3,849 11.58 5,268 28.18 0.0790
2016-05-05 2016-03-31 13F MARKETAXESS HOLDINGS Com 57060D108 33,243 1,949 6.23 4,110 15.03 0.0600
2016-01-28 2015-12-31 13F MARKETAXESS HOLDINGS Com 57060D108 31,294 -9,374 -23.05 3,573 -3.30 0.0533
2015-11-12 2015-09-30 13F MARKETAXESS HOLDINGS Com 57060D108 40,668 -10,132 -19.94 3,695 -21.22 0.0562
2015-08-06 2015-06-30 13F MARKETAXESS HOLDINGS Com 57060D108 50,800 -8,978 -15.02 4,690 -9.21 0.0650
2015-05-11 2015-03-31 13F MARKETAXESS HOLDINGS Com 57060D108 59,778 -2,722 -4.36 5,166 14.44 0.0638
2015-02-09 2014-12-31 13F MARKETAXESS HOLDINGS COM 57060D108 62,500 45,912 276.78 4,514 338.68 0.0586
2014-11-05 2014-09-30 13F MARKETAXESS HOLDINGS COM 57060D108 16,588 16,588 1,029 0.0142
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.