PAGE 1
000 B000000 10/31/2009
000 C000000 0001285650
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 Calamos Global Total Return Fund
001 B000000 811-21547
001 C000000 6302457200
002 A000000 2020 Calamos Court
002 B000000 Naperville
002 C000000 IL
002 D010000 60563
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
008 A000001 CALAMOS ADVISORS LLC
008 B000001 A
008 C000001 801-29688
008 D010001 NAPERVILLE
008 D020001 IL
008 D030001 60563
010 A000001 State Street Bank and Trust Company
010 B000001 028-00733
010 C010001 Boston
010 C020001 MA
010 C030001 02111
012 A000001 BANK OF NEW YORK (COMMON)
012 B000001 85-05006
012 C010001 NEW YORK
012 C020001 NY
012 C030001 10286
012 A000002 DELETE
013 A000001 Deloitte & Touche LLP
013 B010001 Chicago
013 B020001 IL
013 B030001 60606
014 A000001 CALAMOS FINANCIAL SERVICES LLC
014 B000001 8-37854
015 A000001 STATE STREET BANK & TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02111
PAGE 2
015 E010001 X
015 A000002 HSBC AUSTRALIA
015 B000002 S
015 C010002 MELBOURNE
015 D010002 AUSTRALIA
015 E040002 X
015 A000003 CITIBANK NA
015 B000003 S
015 C010003 SAO PAULO
015 D010003 BRAZIL
015 E040003 X
015 A000004 CANADA SELF CUSTODY-CDSX DEBT CLEARING SYSTEM
015 B000004 S
015 C010004 TORONTO
015 D010004 CANADA
015 E040004 X
015 A000005 Skandinaviska Enskilda Banken
015 B000005 S
015 C010005 COPENHAGEN
015 D010005 DENMARK
015 E040005 X
015 A000006 EUROCLEAR BANK
015 B000006 S
015 C010006 BRUSSELS
015 D010006 BELGIUM
015 E040006 X
015 A000007 Skandinaviska Enskilda Banken Helsinki
015 B000007 S
015 C010007 Helsinki
015 D010007 Finland
015 E040007 X
015 A000008 DEUTSCHE BANK, AG
015 B000008 S
015 C010008 PARIS
015 D010008 FRANCE
015 E040008 X
015 A000009 DEUTSCHE BANK AG FRANKFURT
015 B000009 S
015 C010009 FRANKFURT
015 D010009 GERMANY
015 E040009 X
015 A000010 STANDARD CHARTERED BANK
015 B000010 S
015 C010010 KWUN TONG
015 D010010 HONG KONG
015 E040010 X
015 A000011 HSBC - JAPAN
015 B000011 S
015 C010011 TOKYO
015 D010011 JAPAN
015 E040011 X
PAGE 3
015 A000012 Skandinaviska Enskilda Banken
015 B000012 S
015 C010012 OSLO
015 D010012 NORWAY
015 E040012 X
015 A000013 CITIBANK SINGAPORE
015 B000013 S
015 C010013 Singapore
015 D010013 Singapore
015 E040013 X
015 A000014 NEDCOR BANK
015 B000014 S
015 C010014 BRAAMFONTEIN
015 D010014 SOUTH AFRICA
015 E040014 X
015 A000015 DEUTSCHE BANK
015 B000015 S
015 C010015 BARCELONA
015 D010015 SPAIN
015 E040015 X
015 A000016 Credit Suisse Zurich
015 B000016 S
015 C010016 Zurich
015 D010016 Switzerland
015 E040016 X
015 A000017 Standard Chartered PLC
015 B000017 S
015 C010017 Taipei
015 D010017 Taiwan
015 E040017 X
015 A000018 STATE STREET BANK AND TRUST COMPANY
015 B000018 S
015 C010018 LONDON
015 D010018 UNITED KINGDOM
015 E040018 X
018 000000 Y
019 A000000 Y
019 B000000 19
019 C000000 CALAMOSINV
020 A000001 DEUTSCHE BANK SECURITIES, INC.
020 B000001 13-2730828
020 C000001 107
020 A000002 SUSQUEHANNA INVESTMENT GROUP
020 B000002 23-2454154
020 C000002 55
020 A000003 BANK OF AMERICA
020 B000003 56-0906609
020 C000003 31
020 A000004 CREDIT SUISSE FIRST BOSTON
020 B000004 13-2853402
020 C000004 24
PAGE 4
020 A000005 B-TRADE SERVICES LLC
020 B000005 13-3872408
020 C000005 10
020 A000006 SG SECURITIES, INC
020 B000006 93-1316665
020 C000006 9
020 A000007 CF Global
020 B000007 11-19175
020 C000007 6
020 A000008 J.P. MORGAN SECURITIES INC.
020 B000008 13-3224016
020 C000008 6
020 A000009 G TRADE
020 C000009 5
020 A000010 MORGAN STANLEY
020 B000010 13-2655998
020 C000010 4
021 000000 273
022 A000001 BNP PARIBAS
022 B000001 13-1929559
022 C000001 28280
022 D000001 27000
022 A000002 BARCLAYS GLOBAL INVESTORS SERVICES
022 B000002 94-3231066
022 C000002 9278
022 D000002 15588
022 A000003 CREDIT SUISSE FIRST BOSTON
022 B000003 13-2853402
022 C000003 6127
022 D000003 5227
022 A000004 J.P. MORGAN SECURITIES INC.
022 B000004 13-3224016
022 C000004 8371
022 D000004 2572
022 A000005 Nomura Securities Intl
022 B000005 13-2642206
022 C000005 3490
022 D000005 4885
022 A000006 KBC Financial Group
022 B000006 06-1548680
022 C000006 4620
022 D000006 1272
022 A000007 ABG SUNDAL COLLIER INC.
022 B000007 13-3626811
022 C000007 5006
022 D000007 0
022 A000008 BANK OF AMERICA
022 B000008 56-0906609
022 C000008 1597
022 D000008 2568
022 A000009 GOLDMAN, SACHS & CO.
PAGE 5
022 B000009 13-5108880
022 C000009 1609
022 D000009 2037
022 A000010 DEUTSCHE BANK SECURITIES, INC.
022 B000010 13-2730828
022 C000010 2823
022 D000010 138
023 C000000 151250
023 D000000 148425
024 000000 Y
025 A000001 J.P. MORGAN SECURITIES INC.
025 B000001 13-3224016
025 C000001 E
025 D000001 2172
025 A000002 GOLDMAN, SACHS & CO.
025 B000002 13-5108880
025 C000002 E
025 D000002 759
025 A000003 CREDIT SUISSE FIRST BOSTON
025 B000003 13-2853402
025 C000003 E
025 D000003 714
025 A000004 BNP PARIBAS
025 B000004 13-1929559
025 C000004 E
025 D000004 709
025 A000005 DEUTSCHE BANK SECURITIES, INC.
025 B000005 13-2730828
025 C000005 E
025 D000005 703
025 A000006 BARCLAYS GLOBAL INVESTORS SERVICES
025 B000006 94-3231066
025 C000006 E
025 D000006 699
025 A000007 BANK OF AMERICA
025 B000007 56-0906609
025 C000007 E
025 D000007 2261
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
PAGE 6
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0
028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 1.000
048 A010000 0
PAGE 7
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 Y
053 B000000 N
053 C000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 N
055 B000000 Y
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
PAGE 8
061 000000 0
062 A000000 N
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 0.0
066 A000000 Y
066 B000000 N
066 C000000 N
066 D000000 N
066 E000000 N
066 F000000 N
066 G000000 Y
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 Y
070 B020000 Y
070 C010000 Y
070 C020000 N
070 D010000 Y
070 D020000 Y
070 E010000 Y
070 E020000 N
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
070 H020000 N
070 I010000 Y
070 I020000 N
070 J010000 Y
PAGE 9
070 J020000 Y
070 K010000 Y
070 K020000 Y
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 Y
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000 78085
071 B000000 83937
071 C000000 120866
071 D000000 65
072 A000000 12
072 B000000 3749
072 C000000 2773
072 D000000 0
072 E000000 0
072 F000000 1266
072 G000000 0
072 H000000 0
072 I000000 29
072 J000000 24
072 K000000 0
072 L000000 22
072 M000000 19
072 N000000 26
072 O000000 0
072 P000000 924
072 Q000000 24
072 R000000 4
072 S000000 5
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 7
072 X000000 2350
072 Y000000 7
072 Z000000 4178
072AA000000 9385
072BB000000 4177
072CC010000 22814
072CC020000 0
PAGE 10
072DD010000 9361
072DD020000 0
072EE000000 699
073 A010000 1.1700
073 A020000 0.0000
073 B000000 0.0900
073 C000000 0.0000
074 A000000 101
074 B000000 0
074 C000000 0
074 D000000 62241
074 E000000 9879
074 F000000 68683
074 G000000 319
074 H000000 0
074 I000000 2272
074 J000000 0
074 K000000 0
074 L000000 998
074 M000000 42
074 N000000 144535
074 O000000 0
074 P000000 161
074 Q000000 30000
074 R010000 0
074 R020000 0
074 R030000 2034
074 R040000 326
074 S000000 0
074 T000000 112014
074 U010000 8019
074 U020000 0
074 V010000 13.97
074 V020000 0.00
074 W000000 0.0000
074 X000000 8
074 Y000000 83712
075 A000000 0
075 B000000 96771
076 000000 13.30
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
PAGE 11
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078 000000 N
080 A000000 ICI Mutual Insurance Company
080 C000000 10875
081 A000000 Y
081 B000000 28
082 A000000 Y
082 B000000 100
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 N
085 B000000 N
086 A010000 12
086 A020000 163
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 Common Stock
087 A020000 128118106
087 A030000 CGO
088 A000000 N
088 B000000 N
088 C000000 Y
088 D000000 N
SIGNATURE NIMISH BHATT
TITLE CHIEF FINANCIAL OFFICER