MARKETAXESS HLDGS INC

Ticker: MKTX CUSIP: 57060D108 Class: COM

CONNING INC.'s Holding History (CIK: 0000801051)

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

Q2 2021

Shares 452 Value ($000) $210 Avg Close $449.61 Range $407.56 - $515.46

Q1 2021

Shares 497 Value ($000) $247 Avg Close $503.06 Range $444.56 - $555.48

Q4 2020

Shares 543 Value ($000) $310 Avg Close $513.28 Range $445.05 - $571.70

Q3 2020

Shares 493 Value ($000) $237 Avg Close $465.37 Range $409.02 - $528.32

Q2 2020

Shares 465 Value ($000) $233 Avg Close $438.02 Range $297.02 - $495.82

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2021	452	$210	$449.61	$407.56 - $515.46
Q1 2021	497	$247	$503.06	$444.56 - $555.48
Q4 2020	543	$310	$513.28	$445.05 - $571.70
Q3 2020	493	$237	$465.37	$409.02 - $528.32
Q2 2020	465	$233	$438.02	$297.02 - $495.82