MARKETAXESS HLDGS INC

Ticker: MKTX CUSIP: 57060D108 Class: COM

HBK INVESTMENTS L P's Holding History (CIK: 0001011443)

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

Q3 2017

Shares 6,500 Value ($000) $1,199 Avg Close $176.21 Range $159.36 - $192.97

Q1 2017

Shares 1,385 Value ($000) $260 Avg Close $166.41 Range $135.53 - $184.55

Q4 2016

Shares 31,877 Value ($000) $4,683 Avg Close $145.60 Range $133.06 - $158.12

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	6,500	$1,199	$176.21	$159.36 - $192.97
Q1 2017	1,385	$260	$166.41	$135.53 - $184.55
Q4 2016	31,877	$4,683	$145.60	$133.06 - $158.12