#1

PSINet, Inc.

#2

MARKETAXESS HOLDINGS, INC.

#3

MARKETAXESS HOLDINGS, INC.

#4

MARKETAXESS HOLDINGS, INC.

#5

Hurricane Electric LLC

#6

MARKETAXESS HOLDINGS, INC.

#7

MARKETAXESS HOLDINGS, INC.

#8

MARKETAXESS HOLDINGS, INC.

#9

RIPE Network Coordination Centre

#10

RIPE Network Coordination Centre

#11

RIPE Network Coordination Centre

#12

RIPE Network Coordination Centre

#13

RIPE Network Coordination Centre

#14

RIPE Network Coordination Centre

#15

MARKETAXESS HOLDINGS, INC.

#16

MARKETAXESS HOLDINGS, INC.

#17

MARKETAXESS HOLDINGS, INC.

#18

MARKETAXESS HOLDINGS, INC.

#19

MARKETAXESS HOLDINGS, INC.

#20

RIPE Network Coordination Centre