MarketAxess Holdings Inc.

Pintoff Scott sold 100 shares of MKTX on 10 July. They now own 11,686 MKTX shares.

Hernandez Carlos Mauricio bought 10,708 shares of MKTX on 18 June. They now own 23,814 MKTX shares.

Hernandez Carlos Mauricio sold 10,708 shares of MKTX on 18 June. They now own 1,772 MKTX shares.

Begleiter Steven L bought 1,390 shares of MKTX on 10 June. They now own 12,074 MKTX shares.

Altobello Nancy A. bought 1,390 shares of MKTX on 10 June. They now own 5,152 MKTX shares.

Cifu Douglas A bought 1,390 shares of MKTX on 10 June. They now own 1,649 MKTX shares.

Hernandez Carlos Mauricio bought 2,616 shares of MKTX on 10 June. They now own 13,106 MKTX shares.

Chwick Jane bought 1,390 shares of MKTX on 10 June. They now own 9,829 MKTX shares.

Portney Emily Hope bought 1,390 shares of MKTX on 10 June. They now own 2,174 MKTX shares.

Pintoff Scott sold 100 shares of MKTX on 10 June. They now own 11,786 MKTX shares.

Gibson Kourtney bought 1,390 shares of MKTX on 10 June. They now own 4,542 MKTX shares.

Cruger William Frank Jr. bought 1,390 shares of MKTX on 10 June. They now own 10,197 MKTX shares.

Hoornweg Roberto bought 1,390 shares of MKTX on 10 June. They now own 2,389 MKTX shares.

Schiciano Kenneth T bought 1,390 shares of MKTX on 10 June. They now own 1,945 MKTX shares.

Ketchum Richard G bought 1,390 shares of MKTX on 10 June. They now own 6,093 MKTX shares.

Pintoff Scott sold 100 shares of MKTX on 11 May. They now own 11,886 MKTX shares.

Quan William bought 218 shares of MKTX on 1 May. They now own 218 MKTX shares.

Pintoff Scott sold 100 shares of MKTX on 10 April. They now own 11,986 MKTX shares.

Concannon Christopher R sold 349 shares of MKTX on 3 April. They now own 53,600 MKTX shares.

Quan William bought 0 shares of MKTX on 16 March. They now own 0 MKTX shares.

Pintoff Scott sold 100 shares of MKTX on 10 March. They now own 12,086 MKTX shares.

Schiciano Kenneth T bought 0 shares of MKTX on 1 March. They now own 296 MKTX shares.

Cifu Douglas A bought 0 shares of MKTX on 1 March. They now own 0 MKTX shares.

Cifu Douglas A bought 259 shares of MKTX on 1 March. They now own 259 MKTX shares.

Panchal Naineshkumar Shantilal sold 1,470 shares of MKTX on 1 March. They now own 11,331 MKTX shares.

Schiciano Kenneth T bought 259 shares of MKTX on 1 March. They now own 555 MKTX shares.

Mirwani Nitin A bought 1,766 shares of MKTX on 15 February. They now own 1,766 MKTX shares.

Mcpherson Kevin M sold 462 shares of MKTX on 15 February. They now own 68,158 MKTX shares.

Panchal Naineshkumar Shantilal sold 1,016 shares of MKTX on 15 February. They now own 12,801 MKTX shares.

Concannon Christopher R bought 21,736 shares of MKTX on 15 February. They now own 21,736 MKTX shares.

Pintoff Scott bought 3,165 shares of MKTX on 15 February. They now own 13,010 MKTX shares.

Fiszel Bieler Ilene sold 439 shares of MKTX on 15 February. They now own 8,988 MKTX shares.

Pintoff Scott sold 824 shares of MKTX on 15 February. They now own 12,186 MKTX shares.

Pintoff Scott sold 208 shares of MKTX on 15 February. They now own 9,845 MKTX shares.

Concannon Christopher R sold 1,750 shares of MKTX on 15 February. They now own 53,949 MKTX shares.

Panchal Naineshkumar Shantilal bought 3,239 shares of MKTX on 15 February. They now own 13,817 MKTX shares.

Panchal Naineshkumar Shantilal sold 159 shares of MKTX on 15 February. They now own 10,578 MKTX shares.

Concannon Christopher R bought 6,588 shares of MKTX on 15 February. They now own 55,699 MKTX shares.

Concannon Christopher R sold 866 shares of MKTX on 15 February. They now own 49,111 MKTX shares.

Fiszel Bieler Ilene bought 5,005 shares of MKTX on 15 February. They now own 9,427 MKTX shares.

Mcpherson Kevin M bought 4,416 shares of MKTX on 15 February. They now own 72,574 MKTX shares.

Mcpherson Kevin M sold 1,525 shares of MKTX on 15 February. They now own 71,049 MKTX shares.

Pintoff Scott bought 515 shares of MKTX on 13 February. They now own 10,053 MKTX shares.

Concannon Christopher R bought 1,696 shares of MKTX on 13 February. They now own 49,977 MKTX shares.

Mcpherson Kevin M bought 939 shares of MKTX on 13 February. They now own 68,620 MKTX shares.

Panchal Naineshkumar Shantilal bought 394 shares of MKTX on 13 February. They now own 10,737 MKTX shares.

Pintoff Scott sold 100 shares of MKTX on 10 February. They now own 9,538 MKTX shares.

Pintoff Scott sold 100 shares of MKTX on 12 January. They now own 9,638 MKTX shares.

Pintoff Scott sold 100 shares of MKTX on 12 December. They now own 9,738 MKTX shares.

Hernandez Carlos Mauricio sold 7,466 shares of MKTX on 25 November. They now own 0 MKTX shares.

Hernandez Carlos Mauricio bought 7,466 shares of MKTX on 25 November. They now own 10,490 MKTX shares.

Berry Dean bought 26,017 shares of MKTX on 1 October. They now own 26,017 MKTX shares.

Berry Dean bought 0 shares of MKTX on 29 September. They now own 0 MKTX shares.

Mcpherson Kevin M sold 1,494 shares of MKTX on 12 September. They now own 67,681 MKTX shares.

Casper Stephen P sold 1,600 shares of MKTX on 8 September. They now own 43,208 MKTX shares.

Portney Emily Hope bought 3,656 shares of MKTX on 13 August. They now own 3,656 MKTX shares.

Portney Emily Hope sold 3,656 shares of MKTX on 13 August. They now own 784 MKTX shares.

Mirwani Nitin A bought 0 shares of MKTX on 23 June. They now own 0 MKTX shares.

Mcpherson Kevin M sold 2,000 shares of MKTX on 11 June. They now own 69,175 MKTX shares.

Ketchum Richard G bought 784 shares of MKTX on 4 June. They now own 4,703 MKTX shares.

Altobello Nancy A. bought 784 shares of MKTX on 4 June. They now own 3,762 MKTX shares.

Cruger William Frank Jr. bought 784 shares of MKTX on 4 June. They now own 8,807 MKTX shares.

Portney Emily Hope bought 784 shares of MKTX on 4 June. They now own 4,440 MKTX shares.

Casper Stephen P bought 784 shares of MKTX on 4 June. They now own 9,985 MKTX shares.

Begleiter Steven L bought 784 shares of MKTX on 4 June. They now own 10,684 MKTX shares.

Hernandez Carlos Mauricio bought 1,475 shares of MKTX on 4 June. They now own 3,024 MKTX shares.

Chwick Jane bought 784 shares of MKTX on 4 June. They now own 8,439 MKTX shares.

Hoornweg Roberto bought 784 shares of MKTX on 4 June. They now own 999 MKTX shares.

Gibson Kourtney bought 784 shares of MKTX on 4 June. They now own 3,152 MKTX shares.

Fiszel Bieler Ilene sold 242 shares of MKTX on 3 June. They now own 4,422 MKTX shares.

Mcpherson Kevin M sold 250 shares of MKTX on 15 May. They now own 71,175 MKTX shares.

Roupie Christophe Pierre Daniel sold 1,189 shares of MKTX on 14 May. They now own 8,208 MKTX shares.

Cianciulli Michael R. bought 232 shares of MKTX on 1 April. They now own 1,155 MKTX shares.

Hernandez Carlos Mauricio bought 12,480 shares of MKTX on 20 March. They now own 12,480 MKTX shares.

Hernandez Carlos Mauricio sold 12,480 shares of MKTX on 20 March. They now own 1,549 MKTX shares.

Hernandez Carlos Mauricio bought 12,480 shares of MKTX on 3 March. They now own 14,029 MKTX shares.

Hernandez Carlos Mauricio sold 12,480 shares of MKTX on 3 March. They now own 7,466 MKTX shares.

Panchal Naineshkumar Shantilal sold 991 shares of MKTX on 1 March. They now own 10,926 MKTX shares.

Hoornweg Roberto bought 215 shares of MKTX on 1 March. They now own 215 MKTX shares.

Panchal Naineshkumar Shantilal sold 583 shares of MKTX on 1 March. They now own 10,343 MKTX shares.

Hoornweg Roberto bought 0 shares of MKTX on 1 March. They now own 0 MKTX shares.

Mcpherson Kevin M sold 1,003 shares of MKTX on 15 February. They now own 71,425 MKTX shares.

Pintoff Scott sold 691 shares of MKTX on 15 February. They now own 9,838 MKTX shares.

Roupie Christophe Pierre Daniel sold 602 shares of MKTX on 15 February. They now own 9,397 MKTX shares.

Fiszel Bieler Ilene bought 2,867 shares of MKTX on 15 February. They now own 4,664 MKTX shares.

Panchal Naineshkumar Shantilal bought 2,468 shares of MKTX on 15 February. They now own 12,541 MKTX shares.

Concannon Christopher R bought 6,202 shares of MKTX on 15 February. They now own 48,974 MKTX shares.

Cianciulli Michael R. sold 83 shares of MKTX on 15 February. They now own 923 MKTX shares.

Concannon Christopher R bought 18,009 shares of MKTX on 15 February. They now own 18,009 MKTX shares.

Cianciulli Michael R. bought 324 shares of MKTX on 15 February. They now own 1,006 MKTX shares.

Roupie Christophe Pierre Daniel bought 2,488 shares of MKTX on 15 February. They now own 9,999 MKTX shares.

Pintoff Scott bought 2,244 shares of MKTX on 15 February. They now own 10,529 MKTX shares.

Panchal Naineshkumar Shantilal sold 624 shares of MKTX on 15 February. They now own 11,917 MKTX shares.

Concannon Christopher R sold 693 shares of MKTX on 15 February. They now own 48,281 MKTX shares.

Mcpherson Kevin M bought 3,740 shares of MKTX on 15 February. They now own 72,428 MKTX shares.

Panchal Naineshkumar Shantilal bought 1,791 shares of MKTX on 14 February. They now own 10,073 MKTX shares.

Pintoff Scott sold 195 shares of MKTX on 31 January. They now own 8,285 MKTX shares.

Concannon Christopher R sold 243 shares of MKTX on 31 January. They now own 42,772 MKTX shares.

Roupie Christophe Pierre Daniel sold 263 shares of MKTX on 31 January. They now own 7,705 MKTX shares.

Mcpherson Kevin M sold 261 shares of MKTX on 31 January. They now own 68,688 MKTX shares.

Concannon Christopher R sold 585 shares of MKTX on 31 January. They now own 43,015 MKTX shares.

Cianciulli Michael R. sold 8 shares of MKTX on 31 January. They now own 682 MKTX shares.

Roupie Christophe Pierre Daniel sold 194 shares of MKTX on 31 January. They now own 7,511 MKTX shares.

Pintoff Scott sold 258 shares of MKTX on 31 January. They now own 8,480 MKTX shares.

Mcpherson Kevin M sold 310 shares of MKTX on 31 January. They now own 68,949 MKTX shares.

Concannon Christopher R bought 1,622 shares of MKTX on 29 January. They now own 43,600 MKTX shares.

Roupie Christophe Pierre Daniel bought 559 shares of MKTX on 29 January. They now own 7,968 MKTX shares.

Pintoff Scott bought 436 shares of MKTX on 29 January. They now own 8,738 MKTX shares.

Mcpherson Kevin M bought 859 shares of MKTX on 29 January. They now own 69,259 MKTX shares.

Hernandez Carlos Mauricio bought 275 shares of MKTX on 1 January. They now own 1,549 MKTX shares.

Pintoff Scott sold 300 shares of MKTX on 9 December. They now own 8,302 MKTX shares.

Chwick Jane sold 381 shares of MKTX on 2 December. They now own 7,655 MKTX shares.

Mcvey Richard M sold 3,290 shares of MKTX on 14 November. They now own 562,029 MKTX shares.

Mcvey Richard M sold 6,710 shares of MKTX on 14 November. They now own 565,319 MKTX shares.

Mcvey Richard M sold 2,188 shares of MKTX on 13 November. They now own 572,179 MKTX shares.

Mcvey Richard M sold 150 shares of MKTX on 13 November. They now own 572,029 MKTX shares.

Mcvey Richard M sold 5,143 shares of MKTX on 13 November. They now own 574,367 MKTX shares.

Mcvey Richard M sold 949 shares of MKTX on 13 November. They now own 579,510 MKTX shares.

Mcvey Richard M sold 1,937 shares of MKTX on 13 November. They now own 581,933 MKTX shares.

Mcvey Richard M sold 8,159 shares of MKTX on 13 November. They now own 583,870 MKTX shares.

Mcvey Richard M sold 1,474 shares of MKTX on 13 November. They now own 580,459 MKTX shares.

Mcvey Richard M sold 928 shares of MKTX on 12 November. They now own 592,029 MKTX shares.

Mcvey Richard M sold 3,233 shares of MKTX on 12 November. They now own 592,957 MKTX shares.

Mcvey Richard M sold 7,266 shares of MKTX on 12 November. They now own 596,190 MKTX shares.

Mcvey Richard M sold 8,573 shares of MKTX on 12 November. They now own 603,456 MKTX shares.

Casper Stephen P sold 1,000 shares of MKTX on 6 September. They now own 9,201 MKTX shares.

Mcpherson Kevin M sold 1,692 shares of MKTX on 14 August. They now own 68,400 MKTX shares.

Pintoff Scott sold 900 shares of MKTX on 13 August. They now own 8,602 MKTX shares.

Roupie Christophe Pierre Daniel sold 617 shares of MKTX on 8 August. They now own 7,409 MKTX shares.

Casper Stephen P sold 500 shares of MKTX on 7 June. They now own 10,201 MKTX shares.

Portney Emily Hope bought 781 shares of MKTX on 5 June. They now own 3,656 MKTX shares.

Hernandez Carlos Mauricio bought 781 shares of MKTX on 5 June. They now own 1,274 MKTX shares.

Altobello Nancy A. bought 903 shares of MKTX on 5 June. They now own 2,978 MKTX shares.

Gibson Kourtney bought 781 shares of MKTX on 5 June. They now own 2,368 MKTX shares.

Cruger William Frank Jr. bought 781 shares of MKTX on 5 June. They now own 8,023 MKTX shares.

Begleiter Steven L bought 781 shares of MKTX on 5 June. They now own 9,900 MKTX shares.

Ketchum Richard G bought 781 shares of MKTX on 5 June. They now own 3,919 MKTX shares.

Casper Stephen P bought 781 shares of MKTX on 5 June. They now own 10,701 MKTX shares.

Chwick Jane bought 781 shares of MKTX on 5 June. They now own 8,036 MKTX shares.

Fiszel Bieler Ilene bought 1,797 shares of MKTX on 3 June. They now own 1,797 MKTX shares.

Fiszel Bieler Ilene sold 0 shares of MKTX on 23 May. They now own 0 MKTX shares.

Mcvey Richard M sold 9,300 shares of MKTX on 22 May. They now own 612,029 MKTX shares.

Panchal Naineshkumar Shantilal sold 491 shares of MKTX on 1 March. They now own 8,282 MKTX shares.

Mcpherson Kevin M sold 2,000 shares of MKTX on 16 February. They now own 70,092 MKTX shares.

Pintoff Scott bought 1,855 shares of MKTX on 15 February. They now own 8,827 MKTX shares.

Panchal Naineshkumar Shantilal sold 125 shares of MKTX on 15 February. They now own 8,773 MKTX shares.

Cianciulli Michael R. bought 225 shares of MKTX on 15 February. They now own 670 MKTX shares.

Concannon Christopher R bought 11,503 shares of MKTX on 15 February. They now own 11,503 MKTX shares.

Concannon Christopher R bought 3,991 shares of MKTX on 15 February. They now own 41,978 MKTX shares.

Mcvey Richard M bought 2,611 shares of MKTX on 15 February. They now own 621,329 MKTX shares.

Pintoff Scott bought 899 shares of MKTX on 15 February. They now own 9,726 MKTX shares.

Cianciulli Michael R. sold 13 shares of MKTX on 15 February. They now own 657 MKTX shares.

Roupie Christophe Pierre Daniel sold 204 shares of MKTX on 15 February. They now own 8,026 MKTX shares.

Panchal Naineshkumar Shantilal bought 2,698 shares of MKTX on 15 February. They now own 8,898 MKTX shares.

Mcpherson Kevin M sold 378 shares of MKTX on 15 February. They now own 72,092 MKTX shares.

Mcpherson Kevin M bought 3,653 shares of MKTX on 15 February. They now own 72,470 MKTX shares.

Roupie Christophe Pierre Daniel bought 2,519 shares of MKTX on 15 February. They now own 8,230 MKTX shares.

Cianciulli Michael R. bought 281 shares of MKTX on 15 February. They now own 445 MKTX shares.

Pintoff Scott sold 224 shares of MKTX on 15 February. They now own 9,502 MKTX shares.

Mcvey Richard M bought 7,527 shares of MKTX on 15 February. They now own 7,527 MKTX shares.

Cianciulli Michael R. sold 0 shares of MKTX on 1 February. They now own 132 MKTX shares.

Pintoff Scott sold 177 shares of MKTX on 31 January. They now own 7,132 MKTX shares.

Gerosa Christopher N. sold 79 shares of MKTX on 31 January. They now own 1,774 MKTX shares.

Gerosa Christopher N. sold 22 shares of MKTX on 31 January. They now own 1,752 MKTX shares.

Mcvey Richard M sold 277 shares of MKTX on 31 January. They now own 621,533 MKTX shares.

Mcvey Richard M sold 652 shares of MKTX on 31 January. They now own 618,718 MKTX shares.

Mcpherson Kevin M sold 182 shares of MKTX on 31 January. They now own 68,817 MKTX shares.

Concannon Christopher R sold 459 shares of MKTX on 31 January. They now own 37,987 MKTX shares.

Roupie Christophe Pierre Daniel sold 83 shares of MKTX on 31 January. They now own 5,711 MKTX shares.

Mcpherson Kevin M sold 310 shares of MKTX on 31 January. They now own 68,999 MKTX shares.

Roupie Christophe Pierre Daniel sold 193 shares of MKTX on 31 January. They now own 5,794 MKTX shares.

Pintoff Scott sold 160 shares of MKTX on 31 January. They now own 6,972 MKTX shares.

Concannon Christopher R sold 195 shares of MKTX on 31 January. They now own 38,751 MKTX shares.

Concannon Christopher R sold 305 shares of MKTX on 31 January. They now own 38,446 MKTX shares.

Pintoff Scott sold 135 shares of MKTX on 31 January. They now own 7,309 MKTX shares.

Roupie Christophe Pierre Daniel sold 70 shares of MKTX on 31 January. They now own 5,987 MKTX shares.

Mcvey Richard M sold 711 shares of MKTX on 31 January. They now own 619,370 MKTX shares.

Mcvey Richard M sold 1,452 shares of MKTX on 31 January. They now own 620,081 MKTX shares.

Mcpherson Kevin M sold 154 shares of MKTX on 31 January. They now own 69,309 MKTX shares.

Concannon Christopher R sold 5,077 shares of MKTX on 22 January. They now own 42,988 MKTX shares.

Concannon Christopher R sold 4,042 shares of MKTX on 22 January. They now own 38,946 MKTX shares.

Pintoff Scott bought 288 shares of MKTX on 16 January. They now own 7,444 MKTX shares.

Roupie Christophe Pierre Daniel bought 175 shares of MKTX on 16 January. They now own 6,057 MKTX shares.

Mcpherson Kevin M bought 504 shares of MKTX on 16 January. They now own 69,463 MKTX shares.

Mcvey Richard M bought 1,277 shares of MKTX on 16 January. They now own 621,810 MKTX shares.

Concannon Christopher R bought 899 shares of MKTX on 16 January. They now own 48,065 MKTX shares.

Mcvey Richard M sold 14,558 shares of MKTX on 15 January. They now own 631,456 MKTX shares.

Mcvey Richard M sold 10,923 shares of MKTX on 15 January. They now own 620,533 MKTX shares.

Mcvey Richard M sold 16,037 shares of MKTX on 10 January. They now own 0 MKTX shares.

Mcvey Richard M sold 6,368 shares of MKTX on 10 January. They now own 646,014 MKTX shares.

Mcvey Richard M bought 16,037 shares of MKTX on 10 January. They now own 652,382 MKTX shares.

Mcpherson Kevin M sold 920 shares of MKTX on 8 December. They now own 68,959 MKTX shares.

Mcpherson Kevin M sold 1,020 shares of MKTX on 27 November. They now own 69,879 MKTX shares.

Hernandez Carlos Mauricio bought 19,946 shares of MKTX on 20 November. They now own 19,946 MKTX shares.

Hernandez Carlos Mauricio sold 19,946 shares of MKTX on 20 November. They now own 493 MKTX shares.

Mcvey Richard M sold 10,108 shares of MKTX on 8 November. They now own 636,345 MKTX shares.

Mcvey Richard M sold 9,160 shares of MKTX on 8 November. They now own 646,453 MKTX shares.

Hernandez Carlos Mauricio bought 493 shares of MKTX on 23 October. They now own 20,439 MKTX shares.

Hernandez Carlos Mauricio sold 0 shares of MKTX on 13 September. They now own 19,946 MKTX shares.

Casper Stephen P sold 200 shares of MKTX on 28 August. They now own 9,920 MKTX shares.