X0202 4/A 2007-03-01 2007-03-05 0 0001285650 CALAMOS GLOBAL TOTAL RETURN FUND CGO 0001248580 CALAMOS JOHN P SR 2020 CALAMOS COURT NAPERVILLE IL 60563 1 1 0 0 president and chairman Common 0 I by spouse Common 70693.66 I by John P Calamos 1985 trust Common 100600 I by J&L Capital LLC March 1, 2007 reported transactions were not settled. Neither the securities, nor the consideration therefor, were delivered. The reporting person is managing member of the limited liability company that owns the reported securities. The reporting person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein. /s/ John P. Calamos, Sr. 2007-03-07