MARKETAXESS HLDGS INC

Ticker: MKTX CUSIP: 57060D108 Class: COM

DF DENT & CO INC's Holding History (CIK: 0000934999)

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

Q1 2018

Shares 3,965 Value ($000) $862 Avg Close $190.22 Range $171.07 - $212.71

Q4 2017

Shares 2,610 Value ($000) $527 Avg Close $174.10 Range $158.03 - $190.10

Q3 2017

Shares 2,610 Value ($000) $482 Avg Close $176.21 Range $159.36 - $192.97

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	3,965	$862	$190.22	$171.07 - $212.71
Q4 2017	2,610	$527	$174.10	$158.03 - $190.10
Q3 2017	2,610	$482	$176.21	$159.36 - $192.97