X0303 4 2010-07-30 0001278021 MARKETAXESS HOLDINGS INC MKTX 0001343722 Trudeau Robert C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 1 0 1 1 May be part of a 13(d) group 0001082906 HOAG JAY C C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001197937 KIMBALL RICK C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001188456 DREW JOHN C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001188444 REYNOLDS JON Q JR C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001188458 GRIFFITH WILLIAM C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group Common Stock 2010-07-30 4 A 0 4923 0 A 4923 I Robert W. Trudeau Common Stock 8403 I TCV VI Management, L.L.C. Represents a grant of restricted stock pursuant to the issuer's 2004 Incentive Plan (as amended and restated effective April 28, 2006). Excludes 4,178 shares that were previously held by Robert W. Trudeau ("Trudeau"), but were transferred from Trudeau to TCV VI Management, L.L.C. ("TCM VI") on June 7, 2010, and are now held directly by TCM VI. These shares of restricted stock are directly held by Trudeau. Trudeau has sole voting and dispositive power over the shares; however, TCM VI owns 100% of the pecuniary interest therein. Trudeau, Jay C. Hoag, Richard H. Kimball, John L. Drew, Jon Q. Reynolds, Jr. and William J.G. Griffith IV (collectively, the "TCM Members") are members of TCM VI, but disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein. Excludes 4,923 shares directly held of record by Trudeau, but includes 4,178 shares that were previously held directly by Trudeau, but were transferred from Trudeau to TCM VI on June 7, 2010, and are now held directly by TCM VI. These shares are directly held by TCM VI. The TCM Members are members of TCM VI, but disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein. Frederic D. Fenton Authorized signatory for Robert W. Trudeau 2010-08-03 Frederic D. Fenton Authorized signatory for Jay C. Hoag 2010-08-03 Frederic D. Fenton Authorized signatory for Richard H. Kimball 2010-08-03 Frederic D. Fenton Authorized signatory for John L. Drew 2010-08-03 Frederic D. Fenton Authorized signatory for Jon Q. Reynolds Jr. 2010-08-03 Frederic D. Fenton Authorized signatory for William J.G. Griffith IV 2010-08-03