X0303 5 2010-10-31 0 0 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 101804.293 I by John P. Calamos 1985 Trust Common 109300 I by J&L Capital LLC Includes 8,380.513 shares acquired between November 2009 and October 2010 under the Calamos Global Total Return Fund dividend reinvestment plan. 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. 2010-12-15