MARKETAXESS HLDGS INC

Ticker: MKTX CUSIP: 57060D108 Class: COM

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 3,175,425 Value ($000) $575,546 Avg Close $169.50 Range $154.80 - $183.58

Q3 2025

Shares 2,230,595 Value ($000) $388,681 Avg Close $193.45 Range $172.51 - $222.19

Q2 2025

Shares 1,339,292 Value ($000) $299,117 Avg Close $216.56 Range $190.86 - $229.08

Q1 2025

Shares 1,361,512 Value ($000) $294,563 Avg Close $206.23 Range $183.82 - $224.26

Q4 2024

Shares 1,369,102 Value ($000) $309,472 Avg Close $257.54 Range $220.08 - $289.94

Q3 2024

Shares 1,338,922 Value ($000) $343,032 Avg Close $228.65 Range $187.70 - $258.10

Q2 2024

Shares 1,330,880 Value ($000) $266,881 Avg Close $200.47 Range $187.45 - $222.81

Q1 2024

Shares 1,125,920 Value ($000) $246,858 Avg Close $228.96 Range $194.52 - $282.26

Q4 2023

Shares 1,122,560 Value ($000) $328,742 Avg Close $233.72 Range $195.99 - $288.33

Q3 2023

Shares 1,118,220 Value ($000) $238,897 Avg Close $233.55 Range $192.90 - $268.22

Q2 2023

Shares 1,107,770 Value ($000) $289,593 Avg Close $286.65 Range $245.65 - $383.62

Q1 2023

Shares 1,109,230 Value ($000) $434,031 Avg Close $339.53 Range $266.01 - $381.21

Q4 2022

Shares 982,030 Value ($000) $273,878 Avg Close $246.25 Range $210.55 - $283.35

Q3 2022

Shares 963,880 Value ($000) $214,454 Avg Close $244.83 Range $207.63 - $267.12

Q2 2022

Shares 807,350 Value ($000) $206,690 Avg Close $260.22 Range $237.15 - $332.85

Q1 2022

Shares 549,500 Value ($000) $186,940 Avg Close $344.01 Range $304.48 - $391.34

Q4 2021

Shares 464,190 Value ($000) $190,907 Avg Close $373.74 Range $323.75 - $410.92

Q3 2021

Shares 449,160 Value ($000) $188,957 Avg Close $434.10 Range $386.93 - $472.28

Q2 2021

Shares 426,060 Value ($000) $197,517 Avg Close $449.61 Range $407.56 - $515.46

Q1 2021

Shares 373,220 Value ($000) $185,834 Avg Close $503.06 Range $444.56 - $555.48

Q4 2020

Shares 385,620 Value ($000) $220,019 Avg Close $513.28 Range $445.05 - $571.70

Q3 2020

Shares 434,320 Value ($000) $209,164 Avg Close $465.37 Range $409.02 - $528.32

Q2 2020

Shares 513,220 Value ($000) $257,082 Avg Close $438.02 Range $297.02 - $495.82

Q1 2020

Shares 600,120 Value ($000) $199,582 Avg Close $327.01 Range $258.83 - $365.21

Q4 2019

Shares 689,220 Value ($000) $261,290 Avg Close $343.80 Range $297.75 - $386.27

Q3 2019

Shares 689,220 Value ($000) $225,720 Avg Close $335.01 Range $297.39 - $394.69

Q2 2019

Shares 705,320 Value ($000) $226,704 Avg Close $270.14 Range $225.08 - $320.72

Q1 2019

Shares 724,220 Value ($000) $178,216 Avg Close $211.23 Range $192.59 - $233.31

Q4 2018

Shares 780,220 Value ($000) $164,868 Avg Close $192.62 Range $159.95 - $215.45

Q3 2018

Shares 834,420 Value ($000) $148,936 Avg Close $178.37 Range $164.65 - $196.55

Q2 2018

Shares 834,420 Value ($000) $165,098 Avg Close $192.09 Range $180.81 - $204.01

Q1 2018

Shares 834,420 Value ($000) $181,436 Avg Close $190.22 Range $171.07 - $212.71

Q4 2017

Shares 859,420 Value ($000) $173,388 Avg Close $174.10 Range $158.03 - $190.10

Q3 2017

Shares 911,920 Value ($000) $168,258 Avg Close $176.21 Range $159.36 - $192.97

Q2 2017

Shares 959,720 Value ($000) $193,000 Avg Close $176.15 Range $163.16 - $194.23

Q1 2017

Shares 959,720 Value ($000) $179,938 Avg Close $166.41 Range $135.53 - $184.55

Q4 2016

Shares 959,720 Value ($000) $141,002 Avg Close $145.60 Range $133.06 - $158.12

Q3 2016

Shares 1,003,420 Value ($000) $166,156 Avg Close $148.56 Range $129.96 - $163.14

Q2 2016

Shares 1,003,420 Value ($000) $145,897 Avg Close $121.40 Range $107.26 - $133.06

Q1 2016

Shares 1,003,420 Value ($000) $125,257 Avg Close $104.04 Range $89.17 - $116.19

Q4 2015

Shares 1,003,420 Value ($000) $111,972 Avg Close $92.99 Range $78.27 - $105.44

Q3 2015

Shares 1,003,420 Value ($000) $93,198 Avg Close $87.71 Range $79.52 - $94.87

Q2 2015

Shares 1,003,420 Value ($000) $93,087 Avg Close $79.87 Range $74.17 - $89.60

Q1 2015

Shares 1,003,420 Value ($000) $83,184 Avg Close $71.51 Range $59.68 - $80.40

Q4 2014

Shares 1,003,420 Value ($000) $71,955 Avg Close $59.29 Range $54.38 - $66.53

Q3 2014

Shares 875,332 Value ($000) $54,148 Avg Close $50.63 Range $42.39 - $56.56

Q2 2014

Shares 699,520 Value ($000) $37,816 Avg Close $48.96 Range $44.53 - $53.88

Q1 2014

Shares 704,920 Value ($000) $41,745 Avg Close $55.22 Range $51.55 - $60.27

Q4 2013

Shares 704,920 Value ($000) $47,180 Avg Close $58.63 Range $53.33 - $63.89

Q3 2013

Shares 704,920 Value ($000) $42,323 Avg Close $47.53 Range $41.58 - $55.43

Q2 2013

Shares 704,920 Value ($000) $32,955 Avg Close $38.12 Range $32.31 - $42.94

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,175,425	$575,546	$169.50	$154.80 - $183.58
Q3 2025	2,230,595	$388,681	$193.45	$172.51 - $222.19
Q2 2025	1,339,292	$299,117	$216.56	$190.86 - $229.08
Q1 2025	1,361,512	$294,563	$206.23	$183.82 - $224.26
Q4 2024	1,369,102	$309,472	$257.54	$220.08 - $289.94
Q3 2024	1,338,922	$343,032	$228.65	$187.70 - $258.10
Q2 2024	1,330,880	$266,881	$200.47	$187.45 - $222.81
Q1 2024	1,125,920	$246,858	$228.96	$194.52 - $282.26
Q4 2023	1,122,560	$328,742	$233.72	$195.99 - $288.33
Q3 2023	1,118,220	$238,897	$233.55	$192.90 - $268.22
Q2 2023	1,107,770	$289,593	$286.65	$245.65 - $383.62
Q1 2023	1,109,230	$434,031	$339.53	$266.01 - $381.21
Q4 2022	982,030	$273,878	$246.25	$210.55 - $283.35
Q3 2022	963,880	$214,454	$244.83	$207.63 - $267.12
Q2 2022	807,350	$206,690	$260.22	$237.15 - $332.85
Q1 2022	549,500	$186,940	$344.01	$304.48 - $391.34
Q4 2021	464,190	$190,907	$373.74	$323.75 - $410.92
Q3 2021	449,160	$188,957	$434.10	$386.93 - $472.28
Q2 2021	426,060	$197,517	$449.61	$407.56 - $515.46
Q1 2021	373,220	$185,834	$503.06	$444.56 - $555.48
Q4 2020	385,620	$220,019	$513.28	$445.05 - $571.70
Q3 2020	434,320	$209,164	$465.37	$409.02 - $528.32
Q2 2020	513,220	$257,082	$438.02	$297.02 - $495.82
Q1 2020	600,120	$199,582	$327.01	$258.83 - $365.21
Q4 2019	689,220	$261,290	$343.80	$297.75 - $386.27
Q3 2019	689,220	$225,720	$335.01	$297.39 - $394.69
Q2 2019	705,320	$226,704	$270.14	$225.08 - $320.72
Q1 2019	724,220	$178,216	$211.23	$192.59 - $233.31
Q4 2018	780,220	$164,868	$192.62	$159.95 - $215.45
Q3 2018	834,420	$148,936	$178.37	$164.65 - $196.55
Q2 2018	834,420	$165,098	$192.09	$180.81 - $204.01
Q1 2018	834,420	$181,436	$190.22	$171.07 - $212.71
Q4 2017	859,420	$173,388	$174.10	$158.03 - $190.10
Q3 2017	911,920	$168,258	$176.21	$159.36 - $192.97
Q2 2017	959,720	$193,000	$176.15	$163.16 - $194.23
Q1 2017	959,720	$179,938	$166.41	$135.53 - $184.55
Q4 2016	959,720	$141,002	$145.60	$133.06 - $158.12
Q3 2016	1,003,420	$166,156	$148.56	$129.96 - $163.14
Q2 2016	1,003,420	$145,897	$121.40	$107.26 - $133.06
Q1 2016	1,003,420	$125,257	$104.04	$89.17 - $116.19
Q4 2015	1,003,420	$111,972	$92.99	$78.27 - $105.44
Q3 2015	1,003,420	$93,198	$87.71	$79.52 - $94.87
Q2 2015	1,003,420	$93,087	$79.87	$74.17 - $89.60
Q1 2015	1,003,420	$83,184	$71.51	$59.68 - $80.40
Q4 2014	1,003,420	$71,955	$59.29	$54.38 - $66.53
Q3 2014	875,332	$54,148	$50.63	$42.39 - $56.56
Q2 2014	699,520	$37,816	$48.96	$44.53 - $53.88
Q1 2014	704,920	$41,745	$55.22	$51.55 - $60.27
Q4 2013	704,920	$47,180	$58.63	$53.33 - $63.89
Q3 2013	704,920	$42,323	$47.53	$41.58 - $55.43
Q2 2013	704,920	$32,955	$38.12	$32.31 - $42.94