Nicholas Themelis Insider Trading Transactions

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General | Insider Transactions | Monthly Overview

Get the latest insider transactions of Nicholas Themelis. Nicholas Themelis is Chief Information Officer in MARKETAXESS HOLDINGS INC ($MKTX) and Head of Technology in MARKETAXESS HOLDINGS INC ($MKTX).

Latest Insider Trading Transactions of Nicholas Themelis

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No. of Purchases	0	0	0	0	0	0	0
Value of Purchases ($)	0	0	0	0	0	0	0
No. of Sales	0	0	0	0	0	0	0
Value of Sales ($)	0	0	0	0	0	0	0

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Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	488.10	300	146,430	17,587	17.9 K to 17.6 K (-1.68 %)
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	483.63	300	145,089	17,887	18.2 K to 17.9 K (-1.65 %)
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	481.01	103	49,544	18,187	18.3 K to 18.2 K (-0.56 %)
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	479.78	352	168,883	18,290	18.6 K to 18.3 K (-1.89 %)
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	478.19	200	95,638	18,642	18.8 K to 18.6 K (-1.06 %)
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	477.04	639	304,829	18,842	19.5 K to 18.8 K (-3.28 %)
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	476.36	1,206	574,490	19,481	20.7 K to 19.5 K (-5.83 %)
Mar 08 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	474.60	900	427,140	20,687	21.6 K to 20.7 K (-4.17 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	11	5,948	21,587	21.6 K to 21.6 K (-0.05 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	11	5,948	21,587	21.6 K to 21.6 K (-0.05 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	147	79,492	21,598	21.7 K to 21.6 K (-0.68 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	147	79,492	21,598	21.7 K to 21.6 K (-0.68 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	2,122	1,147,493	21,745	23.9 K to 21.7 K (-8.89 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	2,122	1,147,493	21,745	23.9 K to 21.7 K (-8.89 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	226	122,212	23,867	24.1 K to 23.9 K (-0.94 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	226	122,212	23,867	24.1 K to 23.9 K (-0.94 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	173	93,551	24,093	24.3 K to 24.1 K (-0.71 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	173	93,551	24,093	24.3 K to 24.1 K (-0.71 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	2,830	1,530,351	24,266	27.1 K to 24.3 K (-10.44 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	2,830	1,530,351	24,266	27.1 K to 24.3 K (-10.44 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	56	30,283	27,096	27.2 K to 27.1 K (-0.21 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	56	30,283	27,096	27.2 K to 27.1 K (-0.21 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	157	84,899	27,152	27.3 K to 27.2 K (-0.57 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	157	84,899	27,152	27.3 K to 27.2 K (-0.57 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	228	123,293	27,309	27.5 K to 27.3 K (-0.83 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	228	123,293	27,309	27.5 K to 27.3 K (-0.83 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	227	122,753	27,537	27.8 K to 27.5 K (-0.82 %)
Feb 02 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	540.76	227	122,753	27,537	27.8 K to 27.5 K (-0.82 %)
Jan 20 2021	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	1,572	0	27,764	26.2 K to 27.8 K (+6.00 %)
Dec 09 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	553.10	63	34,845	26,192	26.3 K to 26.2 K (-0.24 %)
Dec 09 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	549.59	410	225,332	26,255	26.7 K to 26.3 K (-1.54 %)
Dec 09 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	548.21	697	382,102	27,195	27.9 K to 27.2 K (-2.50 %)
Dec 09 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	547.34	530	290,090	26,665	27.2 K to 26.7 K (-1.95 %)
Dec 09 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	546.31	305	166,625	27,892	28.2 K to 27.9 K (-1.08 %)
Dec 09 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	545.14	1,464	798,085	28,197	29.7 K to 28.2 K (-4.94 %)
Dec 09 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	544.04	531	288,885	29,661	30.2 K to 29.7 K (-1.76 %)
Sep 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	459.65	524	240,857	30,192	30.7 K to 30.2 K (-1.71 %)
Sep 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	458.48	200	91,696	30,716	30.9 K to 30.7 K (-0.65 %)
Sep 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	457.69	1,779	814,231	30,916	32.7 K to 30.9 K (-5.44 %)
Sep 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	456.45	745	340,055	32,695	33.4 K to 32.7 K (-2.23 %)
Sep 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	455.08	201	91,471	33,440	33.6 K to 33.4 K (-0.60 %)
Sep 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	453.47	351	159,168	33,641	34 K to 33.6 K (-1.03 %)
Sep 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	450.90	200	90,180	33,992	34.2 K to 34 K (-0.58 %)
May 12 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	482.84	1,405	678,390	34,192	35.6 K to 34.2 K (-3.95 %)
May 12 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	479.66	314	150,613	35,597	35.9 K to 35.6 K (-0.87 %)
May 12 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	478.86	438	209,741	35,911	36.3 K to 35.9 K (-1.20 %)
May 12 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	477.92	988	472,185	36,349	37.3 K to 36.3 K (-2.65 %)
May 12 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	476.85	855	407,707	37,337	38.2 K to 37.3 K (-2.24 %)
Apr 10 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Gift	G	0.00	259	0	38,192	38.5 K to 38.2 K (-0.67 %)
Feb 12 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	342.01	4,000	1,368,040	38,451	42.5 K to 38.5 K (-9.42 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	11	3,896	42,451	42.5 K to 42.5 K (-0.03 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	173	61,273	42,462	42.6 K to 42.5 K (-0.41 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	234	82,878	42,635	42.9 K to 42.6 K (-0.55 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	228	80,753	42,869	43.1 K to 42.9 K (-0.53 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	226	80,045	43,097	43.3 K to 43.1 K (-0.52 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	199	70,482	43,323	43.5 K to 43.3 K (-0.46 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	158	55,960	43,522	43.7 K to 43.5 K (-0.36 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	2,122	751,570	43,680	45.8 K to 43.7 K (-4.63 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	2,829	1,001,975	45,802	48.6 K to 45.8 K (-5.82 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	11	3,896	42,451	42.5 K to 42.5 K (-0.03 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	173	61,273	42,462	42.6 K to 42.5 K (-0.41 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	234	82,878	42,635	42.9 K to 42.6 K (-0.55 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	228	80,753	42,869	43.1 K to 42.9 K (-0.53 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	226	80,045	43,097	43.3 K to 43.1 K (-0.52 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	199	70,482	43,323	43.5 K to 43.3 K (-0.46 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	158	55,960	43,522	43.7 K to 43.5 K (-0.36 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	2,122	751,570	43,680	45.8 K to 43.7 K (-4.63 %)
Feb 04 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	354.18	2,829	1,001,975	45,802	48.6 K to 45.8 K (-5.82 %)
Jan 29 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	830	0	48,631	47.8 K to 48.6 K (+1.74 %)
Jan 29 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	44	0	47,801	47.8 K to 47.8 K (+0.09 %)
Jan 17 2020	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	943	0	47,757	46.8 K to 47.8 K (+2.01 %)
Nov 12 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	349.72	1,200	419,664	46,814	48 K to 46.8 K (-2.50 %)
Nov 12 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	348.60	1,300	453,180	48,014	49.3 K to 48 K (-2.64 %)
Nov 12 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	347.87	1,500	521,805	49,314	50.8 K to 49.3 K (-2.95 %)
Aug 09 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	349.36	330	115,289	50,814	51.1 K to 50.8 K (-0.65 %)
Aug 09 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	348.46	1,120	390,275	51,144	52.3 K to 51.1 K (-2.14 %)
Aug 09 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	347.10	300	104,130	52,264	52.6 K to 52.3 K (-0.57 %)
Aug 09 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	346.09	500	173,045	52,564	53.1 K to 52.6 K (-0.94 %)
Aug 09 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	345.14	500	172,570	53,064	53.6 K to 53.1 K (-0.93 %)
Apr 29 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	265.61	1,489	395,495	53,564	55.1 K to 53.6 K (-2.70 %)
Feb 21 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	12,260	0	55,053	42.8 K to 55.1 K (+28.65 %)
Feb 04 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	214.77	233	50,041	42,793	43 K to 42.8 K (-0.54 %)
Feb 04 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	214.77	158	33,934	43,026	43.2 K to 43 K (-0.37 %)
Feb 04 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	214.77	198	42,524	43,184	43.4 K to 43.2 K (-0.46 %)
Feb 04 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	214.77	396	85,049	43,382	43.8 K to 43.4 K (-0.90 %)
Feb 04 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	214.77	127	27,276	43,778	43.9 K to 43.8 K (-0.29 %)
Feb 04 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	214.77	323	69,371	43,905	44.2 K to 43.9 K (-0.73 %)
Feb 04 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	930	0	44,228	43.3 K to 44.2 K (+2.15 %)
Jan 17 2019	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	1,402	0	43,298	41.9 K to 43.3 K (+3.35 %)
Aug 16 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	187.01	1,437	268,729	41,896	43.3 K to 41.9 K (-3.32 %)
Aug 16 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	186.45	11,394	2,124,365	43,333	54.7 K to 43.3 K (-20.82 %)
Mar 12 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	219.43	1,311	287,666	54,727	56 K to 54.7 K (-2.34 %)
Mar 12 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	218.90	990	216,712	56,038	57 K to 56 K (-1.74 %)
Mar 12 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	218.16	899	196,129	57,028	57.9 K to 57 K (-1.55 %)
Mar 12 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	216.95	2,200	477,292	57,927	60.1 K to 57.9 K (-3.66 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	809	0	60,127	59.3 K to 60.1 K (+1.36 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	196.21	162	31,786	59,318	59.5 K to 59.3 K (-0.27 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	196.21	396	77,699	59,480	59.9 K to 59.5 K (-0.66 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	196.21	1,340	262,921	59,876	61.2 K to 59.9 K (-2.19 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	196.21	127	24,919	61,216	61.3 K to 61.2 K (-0.21 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	196.21	323	63,376	61,343	61.7 K to 61.3 K (-0.52 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	196.21	352	69,066	61,666	62 K to 61.7 K (-0.57 %)
Feb 02 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	196.21	1,094	214,654	62,018	63.1 K to 62 K (-1.73 %)
Jan 17 2018	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	1,395	0	63,112	61.7 K to 63.1 K (+2.26 %)
Nov 03 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Option Exercise	M	10.93	4,000	43,720	0
Nov 03 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	176.40	4,000	705,608	61,717	65.7 K to 61.7 K (-6.09 %)
Nov 03 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Buy	M	10.93	4,000	43,720	65,717	61.7 K to 65.7 K (+6.48 %)
Aug 01 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Gift	G	0.00	450	0	61,717	62.2 K to 61.7 K (-0.72 %)
Jun 12 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Option Exercise	M	10.93	5,596	61,164	4,000
Jun 12 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	202.01	500	101,005	62,167	62.7 K to 62.2 K (-0.80 %)
Jun 12 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	201.01	2,310	464,325	62,667	65 K to 62.7 K (-3.56 %)
Jun 12 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	200.50	2,786	558,591	64,977	67.8 K to 65 K (-4.11 %)
Jun 12 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Buy	M	10.93	5,596	61,164	67,763	62.2 K to 67.8 K (+9.00 %)
Feb 02 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	187.25	429	80,330	62,167	62.6 K to 62.2 K (-0.69 %)
Feb 02 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	187.25	1,411	264,210	62,596	64 K to 62.6 K (-2.20 %)
Feb 02 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	187.25	371	69,470	64,007	64.4 K to 64 K (-0.58 %)
Feb 02 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	187.25	1,152	215,712	64,378	65.5 K to 64.4 K (-1.76 %)
Feb 02 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	187.25	1,375	257,469	65,530	66.9 K to 65.5 K (-2.06 %)
Feb 02 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	187.25	954	178,637	66,905	67.9 K to 66.9 K (-1.41 %)
Jan 18 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Option Exercise	A	156.85	3,830	600,736	3,830
Jan 18 2017	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	972	0	66,026	65.1 K to 66 K (+1.49 %)
Aug 23 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	165.40	5,745	950,223	65,054	70.8 K to 65.1 K (-8.11 %)
Aug 23 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	165.46	455	75,284	70,799	71.3 K to 70.8 K (-0.64 %)
May 05 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Gift	G	0.00	825	0	71,254	72.1 K to 71.3 K (-1.14 %)
May 02 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Gift	G	0.00	102	0	72,079	72.2 K to 72.1 K (-0.14 %)
Feb 04 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	113.77	5,183	589,683	72,181	77.4 K to 72.2 K (-6.70 %)
Feb 04 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	113.75	5,500	625,625	77,364	82.9 K to 77.4 K (-6.64 %)
Feb 02 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	116.23	1,454	168,998	82,864	84.3 K to 82.9 K (-1.72 %)
Feb 02 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	116.23	1,375	159,816	84,318	85.7 K to 84.3 K (-1.60 %)
Feb 02 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	116.23	954	110,883	85,693	86.6 K to 85.7 K (-1.10 %)
Feb 02 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	5,900	0	86,647	80.7 K to 86.6 K (+7.31 %)
Jan 25 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Option Exercise	A	103.30	26,865	2,775,155	26,865
Jan 25 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	8,666	0	80,747	72.1 K to 80.7 K (+12.02 %)
Jan 20 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	2,446	0	72,081	69.6 K to 72.1 K (+3.51 %)
Jan 20 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	101.77	1,924	195,805	69,635	71.6 K to 69.6 K (-2.69 %)
Jan 20 2016	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	101.77	2,183	222,164	71,559	73.7 K to 71.6 K (-2.96 %)
Jul 16 2015	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Gift	G	0.00	250	0	73,742	74 K to 73.7 K (-0.34 %)
Feb 26 2010	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	15.09	11,162	168,489	144,895	156.1 K to 144.9 K (-7.15 %)
Feb 26 2010	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Sell	S	15.39	3,838	59,048	156,057	159.9 K to 156.1 K (-2.40 %)
Feb 03 2010	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	13.80	2,999	41,371	159,895	162.9 K to 159.9 K (-1.84 %)
Jan 20 2010	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	14.29	9,105	130,110	162,894	172 K to 162.9 K (-5.29 %)
Jan 20 2010	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	30,778	0	171,999	141.2 K to 172 K (+21.79 %)
Jan 20 2010	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	24,424	0	141,221	116.8 K to 141.2 K (+20.91 %)
Jan 04 2010	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	13.90	1,456	20,238	116,797	118.3 K to 116.8 K (-1.23 %)
Feb 02 2009	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	7.72	3,200	24,704	118,253	121.5 K to 118.3 K (-2.63 %)
Feb 02 2009	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	7.94	1,522	12,085	121,453	123 K to 121.5 K (-1.24 %)
Jan 23 2009	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Grant	A	0.00	59,372	0	122,975	63.6 K to 123 K (+93.35 %)
Jan 05 2009	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Payment of Exercise	F	8.16	1,127	9,196	63,603	64.7 K to 63.6 K (-1.74 %)
Nov 05 2008	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Buy	P	5.00	4,000	20,000	64,730	60.7 K to 64.7 K (+6.59 %)
Nov 05 2008	MKTX	MARKETAXESS HOLDIN ...	Themelis Nicholas	Chief Information O ...	Buy	P	5.50	4,000	22,000	60,730	56.7 K to 60.7 K (+7.05 %)

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