MARKETAXESS HLDGS INC

Ticker: MKTX CUSIP: 57060D108 Class: COM

JENNISON ASSOCIATES LLC's Holding History (CIK: 0000053417)

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

Q4 2016

Shares 122,795 Value ($000) $18,041 Avg Close $145.60 Range $133.06 - $158.12

Q3 2016

Shares 69,424 Value ($000) $11,496 Avg Close $148.56 Range $129.96 - $163.14

Q2 2016

Shares 3,512 Value ($000) $511 Avg Close $121.40 Range $107.26 - $133.06

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	122,795	$18,041	$145.60	$133.06 - $158.12
Q3 2016	69,424	$11,496	$148.56	$129.96 - $163.14
Q2 2016	3,512	$511	$121.40	$107.26 - $133.06