MarketAxess Holdings Inc.
MX ˙ BMV ˙ US57060D1081
SecurityMX:MKTX / MarketAxess Holdings Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership35,697 shares
Latest Disclosed Value $ 5,889,308
Stifel Financial Corp reports 7.44% increase in ownership of MKTX / MarketAxess Holdings Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 35,697 shares of MarketAxess Holdings Inc. (MX:MKTX) valued at $5,889,308 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 33,224 shares of MarketAxess Holdings Inc.. This represents a change in shares of 7.44% 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)
2026-05-12 2026-03-31 13F MARKETAXESS HLDGS COM 57060D108 35,697 2,473 7.44 5,889 -2.19 0.0054
2026-02-13 2025-12-31 13F MARKETAXESS HLDGS COM 57060D108 33,224 7,687 30.10 6,022 35.33 0.0054
2025-11-12 2025-09-30 13F MARKETAXESS HLDGS COM 57060D108 25,537 14 0.05 4,450 -21.95 0.0041
2025-08-14 2025-06-30 13F MARKETAXESS HLDGS COM 57060D108 25,523 18,164 246.83 5,700 258.04 0.0055
2025-05-14 2025-03-31 13F MARKETAXESS HLDGS COM 57060D108 7,359 4,486 156.14 1,592 145.30 0.0017
2025-02-13 2024-12-31 13F MARKETAXESS HLDGS COM 57060D108 2,873 -553 -16.14 649 -26.00 0.0007
2024-11-14 2024-09-30 13F MARKETAXESS HLDGS COM 57060D108 3,426 -666 -16.28 878 6.95 0.0009
2024-08-13 2024-06-30 13F MARKETAXESS HLDGS COM 57060D108 4,092 1,460 55.47 821 42.11 0.0009
2024-05-14 2024-03-31 13F MARKETAXESS HLDGS COM 57060D108 2,632 -7,325 -73.57 577 -80.21 0.0007
2024-02-12 2023-12-31 13F MARKETAXESS HLDGS COM 57060D108 9,957 -499 -4.77 2,916 30.54 0.0037
2023-11-13 2023-09-30 13F MARKETAXESS HLDGS COM 57060D108 10,456 315 3.11 2,234 -15.77 0.0031
2023-08-14 2023-06-30 13F MARKETAXESS HLDGS COM 57060D108 10,141 -1,341 -11.68 2,651 -40.98 0.0036
2023-05-12 2023-03-31 13F MARKETAXESS HLDGS COM 57060D108 11,482 -7,284 -38.81 4,493 -14.16 0.0064
2023-02-13 2022-12-31 13F MARKETAXESS HLDGS COM 57060D108 18,766 10,765 134.55 5,234 193.82 0.0079
2022-11-14 2022-09-30 13F MARKETAXESS HLDGS COM 57060D108 8,001 436 5.76 1,781 -8.05 0.0029
2022-08-15 2022-06-30 13F MARKETAXESS HLDGS COM 57060D108 7,565 -1,056 -12.25 1,937 -33.96 0.0030
2022-05-13 2022-03-31 13F MARKETAXESS HLDGS COM 57060D108 8,621 -1,632 -15.92 2,933 -30.45 0.0040
2022-02-14 2021-12-31 13F MARKETAXESS HLDGS COM 57060D108 10,253 -1,085 -9.57 4,217 -11.59 0.0056
2021-11-15 2021-09-30 13F MARKETAXESS HLDGS COM 57060D108 11,338 -1,885 -14.26 4,770 -22.19 0.0070
2021-08-13 2021-06-30 13F MARKETAXESS HLDGS COM 57060D108 13,223 -1,750 -11.69 6,130 -17.77 0.0092
2021-05-14 2021-03-31 13F MARKETAXESS HLDGS COM 57060D108 14,973 -1,390 -8.49 7,455 -20.15 0.0123
2021-02-12 2020-12-31 13F MARKETAXESS HLDGS COM 57060D108 16,363 766 4.91 9,336 24.30 0.0167
2020-11-16 2020-09-30 13F MARKETAXESS HLDGS COM 57060D108 15,597 -5,787 -27.06 7,511 -29.88 0.0155
2020-08-14 2020-06-30 13F MARKETAXESS HLDGS COM 57060D108 21,384 -4,086 -16.04 10,712 26.43 0.0246
2020-05-14 2020-03-31 13F MARKETAXESS HLDGS COM 57060D108 25,470 2,732 12.02 8,473 -1.82 0.0234
2020-02-13 2019-12-31 13F MARKETAXESS HLDGS COM 57060D108 22,738 5,238 29.93 8,630 50.43 0.0180
2019-11-19 2019-09-30 13F/A-1 MARKETAXESS HLDGS COM 57060D108 17,500 1,971 12.69 5,737 15.41 0.0146
2019-11-13 2019-09-30 13F MARKETAXESS HLDGS COM 57060D108 17,500 1,971 5,737 3,215.8761
2019-08-14 2019-06-30 13F MARKETAXESS HLDGS COM 57060D108 15,529 1,932 14.21 4,971 49.19 0.0128
2019-05-14 2019-03-31 13F MARKETAXESS HLDGS COM 57060D108 13,597 2,516 22.71 3,332 43.19 0.0094
2019-02-13 2018-12-31 13F MARKETAXESS HLDGS COM 57060D108 11,081 1,064 10.62 2,327 29.93 0.0075
2018-11-13 2018-09-30 13F MARKETAXESS HLDGS COM 57060D108 10,017 1,101 12.35 1,791 1.30 0.0051
2018-08-14 2018-06-30 13F MARKETAXESS HLDGS COM 57060D108 8,916 657 7.95 1,768 -1.67 0.0054
2018-05-11 2018-03-31 13F MARKETAXESS HLDGS COM 57060D108 8,259 -88 -1.05 1,798 7.47 0.0057
2018-02-14 2017-12-31 13F MARKETAXESS HLDGS COM 57060D108 8,347 887 11.89 1,673 21.14 0.0053
2017-11-13 2017-09-30 13F MARKETAXESS HLDGS COM 57060D108 7,460 759 11.33 1,381 3.06 0.0048
2017-08-14 2017-06-30 13F MARKETAXESS HLDGS COM 57060D108 6,701 271 4.21 1,340 11.57 0.0050
2017-05-10 2017-03-31 13F MARKETAXESS HLDGS COM 57060D108 6,430 -1,487 -18.78 1,201 3.53 0.0046
2017-02-16 2016-12-31 13F MARKETAXESS HLDGS COM 57060D108 7,917 -1,298 -14.09 1,160 -23.53 0.0049
2016-11-15 2016-09-30 13F MARKETAXESS HLDGS COM 57060D108 9,215 -3,069 -24.98 1,517 -15.06 0.0068
2016-08-17 2016-06-30 13F MARKETAXESS HLDGS COM 57060D108 12,284 -271 -2.16 1,786 13.90 0.0083
2016-05-16 2016-03-31 13F MARKETAXESS HLDGS COM 57060D108 12,555 -4,169 -24.93 1,568 -15.97 0.0084
2016-03-21 2015-12-31 13F/A-2 MARKETAXESS HLDGS COM 57060D108 16,724 517 3.19 1,866 23.90 0.0097
2016-02-26 2015-12-31 13F/A-1 MARKETAXESS HLDGS COM 57060D108 16,724 0 1,866 0.0098
2016-02-16 2015-12-31 13F MARKETAXESS HLDGS COM 57060D108 16,724 1,866
2015-11-16 2015-09-30 13F MARKETAXESS HLDGS COM 57060D108 16,207 -32,601 -66.79 1,506 -66.74 0.0085
2015-08-17 2015-06-30 13F/A-1 MARKETAXESS HLDGS COM 57060D108 48,808 -69,636 -58.79 4,528 -53.89 0.0234
2015-08-17 2015-06-30 13F MARKETAXESS HLDGS COM 57060D108 48,808 4,528
2015-05-14 2015-03-31 13F MARKETAXESS HLDGS COM 57060D108 118,444 -2,656 -2.19 9,819 -21.70 0.0537
2015-02-13 2014-12-31 13F MARKETAXESS HLDGS COM 57060D108 121,100 5,767 5.00 12,541 75.77 0.0697
2014-11-13 2014-09-30 13F MARKETAXESS HLDGS COM 57060D108 115,333 17,449 17.83 7,135 34.85 0.0626
2014-08-14 2014-06-30 13F MARKETAXESS HLDGS COM 57060D108 97,884 -7,530 -7.14 5,291 -15.24 0.0475
2014-05-15 2014-03-31 13F MARKETAXESS HLDGS COM 57060D108 105,414 105,414 6,242 0.0597
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.