ICTXX Investors Cash Trust (MM)

000 A000000 09/30/2012
000 C000000 0000863209
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 INVESTORS CASH TRUST
001 B000000 811-06103
001 C000000 2015936408
002 A000000 345 Park Avenue
002 B000000 New York
002 C000000 NY
002 D010000 10154
002 D020000 5808
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 3
007 C010200 2
007 C020200 Treasury Portfolio
007 C030200 N
007 C010300 3
007 C020300 Central Cash Management Fund
007 C030300 N
008 A00AA01 DEUTSCHE INVESTMENT MANAGEMENT AMERICAS INC.
008 B00AA01 A
008 C00AA01 801-252
008 D01AA01 NEW YORK
008 D02AA01 NY
008 D03AA01 10154
010 A000201 Deutsche Investment Management Americas Inc.
010 B000201 801-252
010 C010201 New York
010 C020201 NY
010 C030201 10154
010 A000202 State Street Bank & Trust Co.
010 B000202 85-11329
010 C010202 Boston
010 C020202 MA
010 C030202 02111
010 A000301 Deutsche Investment Management Americas Inc.
010 B000301 801-252
010 C010301 New York
010 C020301 NY
010 C030301 10154
010 A000302 State Street Bank & Trust Co.

010 B000302 85-11329
010 C010302 Boston
010 C020302 MA
010 C030302 02111
011 A00AA01 DWS INVESTMENTS DISTRIBUTORS, INC.
011 B00AA01 8-47765
011 C01AA01 CHICAGO
011 C02AA01 IL
011 C03AA01 60606
012 A000201 DWS INVESTMENTS SERVICE COMPANY
012 B000201 84-1713
012 C010201 KANSAS CITY
012 C020201 MO
012 C030201 64105
012 A000202 DST SYSTEMS, INC.
012 B000202 84-00448
012 C010202 KANSAS CITY
012 C020202 MO
012 C030202 64105
012 A000301 DST SYSTEMS, INC.
012 B000301 84-00448
012 C010301 KANSAS CITY
012 C020301 MO
012 C030301 64105
013 A00AA01 ERNST & YOUNG LLP
013 B01AA01 BOSTON
013 B02AA01 MA
013 B03AA01 02116
014 A00AA01 AO DB Securities (Kazakhstan)
014 B00AA01 8-000000
014 A00AA02 Bank Sal. Oppenheim jr. & Cie. (Schweiz) AG
014 B00AA02 8-000000
014 A00AA03 BHF-BANK Aktiengesellschaft
014 B00AA03 8-00000
014 A00AA04 BT Opera Trading SA
014 B00AA04 8-000000
014 A00AA05 Craigs Investment Partners Limited
014 B00AA05 8-000000
014 A00AA06 DB EQUITY LIMITED
014 B00AA06 8-0
014 A00AA07 DB International (Asia) Limited
014 B00AA07 8-000000
014 A00AA08 DB SECURITIES S.A.
014 B00AA08 8-000000
014 A00AA09 DB STRATEGIC ADVISORS, INC.
014 B00AA09 8-000000
014 A00AA10 Deutsche Bank Aktiengesellschaft, Athen
014 B00AA10 8-000000
014 A00AA11 Deutsche Bank Aktiengesellschaft, Auckland
014 B00AA11 8-000000
014 A00AA12 Deutsche Bank Aktiengesellschaft, Bangalore

014 B00AA12 8-000000
014 A00AA13 Deutsche Bank Aktiengesellschaft, Chennai
014 B00AA13 8-000000
014 A00AA14 Deutsche Bank Aktiengesellschaft, Colombo
014 B00AA14 8-000000
014 A00AA15 Deutsche Bank Aktiengesellschaft, Helsinki
014 B00AA15 8-000000
014 A00AA16 Deutsche Bank Aktiengesellschaft, Kalkutta
014 B00AA16 8-000000
014 A00AA17 Deutsche Bank Aktiengesellschaft, Manila
014 B00AA17 8-000000
014 A00AA18 Deutsche Bank Aktiengesellschaft, Mumbai
014 B00AA18 8-000000
014 A00AA19 Deutsche Bank Aktiengesellschaft, New Delhi
014 B00AA19 8-000000
014 A00AA20 Deutsche Bank Aktiengesellschaft, Prag
014 B00AA20 8-000000
014 A00AA21 Deutsche Bank Aktiengesellschaft, Riad
014 B00AA21 8-000000
014 A00AA22 Deutsche Bank Aktiengesellschaft, Stockholm
014 B00AA22 8-000000
014 A00AA23 Deutsche Bank Aktiengesellschaft, Ungarn
014 B00AA23 8-000000
014 A00AA24 Deutsche Bank Aktiengesellschaft, Zurich
014 B00AA24 8-000000
014 A00AA25 DEUTSCHE BANK CORRETORA DE VALORES SA
014 B00AA25 8-0
014 A00AA26 DEUTSCHE BANK SECURITIES, INC.
014 B00AA26 8-0000
014 A00AA27 Deutsche Bank Securities Inc., 345 Park Ave
014 B00AA27 8-000000
014 A00AA28 Deutsche Bank Securities Inc., Atlanta Branch
014 B00AA28 8-000000
014 A00AA29 Deutsche Bank Securities Inc., Baltimore
014 B00AA29 8-000000
014 A00AA30 Deutsche Bank Securities Inc., Boston Branch
014 B00AA30 8-000000
014 A00AA31 Deutsche Bank Securities Inc., Chicago Branch
014 B00AA31 8-000000
014 A00AA32 Deutsche Bank Securities Inc., Costa Mesa
014 B00AA32 8-000000
014 A00AA33 Deutsche Bank Securities Inc., Dallas Branch
014 B00AA33 8-000000
014 A00AA34 Deutsche Bank Securities Inc., DoC
014 B00AA34 8-000000
014 A00AA35 Deutsche Bank Securities Inc., Greenwich
014 B00AA35 8-000000
014 A00AA36 Deutsche Bank Securities Inc., Houston Branch
014 B00AA36 8-000000
014 A00AA37 Deutsche Bank Securities Inc., Jacksonville
014 B00AA37 8-000000

014 A00AA38 Deutsche Bank Securities Inc., LA CIB
014 B00AA38 8-000000
014 A00AA39 Deutsche Bank Securities Inc., LA PWM
014 B00AA39 8-000000
014 A00AA40 Deutsche Bank Securities Inc., Memphis
014 B00AA40 8-000000
014 A00AA41 Deutsche Bank Securities Inc., Menlo Park
014 B00AA41 8-000000
014 A00AA42 Deutsche Bank Securities Inc., Miami
014 B00AA42 8-000000
014 A00AA43 Deutsche Bank Securities Inc., Palm Beach
014 B00AA43 8-000000
014 A00AA44 Deutsche Bank Securities Inc., Philadelphia
014 B00AA44 8-000000
014 A00AA45 Deutsche Bank Securities Inc., San Francisco
014 B00AA45 8-000000
014 A00AA46 Deutsche Bank Securities Inc., Winston-Salem
014 B00AA46 8-000000
014 A00AA47 DEUTSCHE BANK SECURITIES LIMITED
014 B00AA47 8-0
014 A00AA48 Deutsche Bank Societa per Azioni
014 B00AA48 8-000000
014 A00AA49 Deutsche Capital Markets Algeria SPA
014 B00AA49 8-00000
014 A00AA50 DEUTSCHE CAPITAL MARKETS AUSTRALIA LTD
014 B00AA50 8-0
014 A00AA51 Deutsche Equities India Private Limited
014 B00AA51 8-000000
014 A00AA52 Deutsche Futures Singapore Pte Ltd
014 B00AA52 8-0
014 A00AA53 Deutsche Managed Investments Limited
014 B00AA53 8-00000
014 A00AA54 Deutsche Postbank AG
014 B00AA54 8-0
014 A00AA55 Deutsche Regis Partners Inc
014 B00AA55 8-000000
014 A00AA56 Deutsche Securities (Proprietary) Limited
014 B00AA56 8-000000
014 A00AA57 DEUTSCHE SECURITIES ASIA LIMITED
014 B00AA57 8-0
014 A00AA58 Deutsche Securities Asia Limited, Singapore
014 B00AA58 8-0
014 A00AA59 Deutsche Securities Asia Limited, Taipei
014 B00AA59 8-0
014 A00AA60 Deutsche Securities Australia Limited
014 B00AA60 8-031670
014 A00AA61 DEUTSCHE SECURITIES CORREDORES DE BOLSA LTD
014 B00AA61 8-000000
014 A00AA62 Deutsche Securities Inc.
014 B00AA62 8-000000
014 A00AA63 Deutsche Securities Israel Ltd.

014 B00AA63 8-000000
014 A00AA64 DEUTSCHE SECURITIES KOREA CO.
014 B00AA64 8-0
014 A00AA65 Deutsche Securities Limited
014 B00AA65 8-0
014 A00AA66 Deutsche Securities Menkul Degerler A.S.
014 B00AA66 8-000000
014 A00AA67 DEUTSCHE SECURITIES SAUDI ARABIA LLC
014 B00AA67 8-000000
014 A00AA68 Deutsche Securities Sociedad de Bolsa S.A.
014 B00AA68 8-000000
014 A00AA69 Deutsche Securities Venezuela S.A.
014 B00AA69 8-000000
014 A00AA70 Deutsche Securities, S.A. de C.V., Bolsa
014 B00AA70 8-000000
014 A00AA71 DMG & PARTNERS SECURITIES PTE LTD
014 B00AA71 8-0
014 A00AA72 DWS INVESTMENTS DISTRIBUTORS, INC.
014 B00AA72 8-047765
014 A00AA73 DWS Investments Distributors, Inc., NJ
014 B00AA73 8-000000
014 A00AA74 DWS Investments Distributors, Inc., New York
014 B00AA74 8-000000
014 A00AA75 Habubank Securities Joint Stock Company
014 B00AA75 8-000000
014 A00AA76 HANOI BUILDING COMMERCIAL JOINT STOCK BANK
014 B00AA76 8-000000
014 A00AA77 K & N Kenanga Holdings Bhd
014 B00AA77 8-000000
014 A00AA78 Kenanga Deutsche Futures Sdn Bhd
014 B00AA78 8-000000
014 A00AA79 London Dry Bulk Limited
014 B00AA79 8-00000
014 A00AA80 OOO Deutsche Bank
014 B00AA80 8-000000
014 A00AA81 PT. Deutsche Securities Indonesia
014 B00AA81 8-000000
014 A00AA82 PT. Deutsche Verdhana Indonesia
014 B00AA82 8-000000
014 A00AA83 Public joint-stock Co "Deutsche Bank DBU"
014 B00AA83 8-00000
014 A00AA84 Sal. Oppenheim jr. & Cie. AG & Co.
014 B00AA84 8-00000
014 A00AA85 Tilney Investment Management
014 B00AA85 8-000000
014 A00AA86 Yieldbroker Pty Ltd.
014 B00AA86 8-000000
014 A00AA87 ZAO Deutsche Securities
014 B00AA87 8-00000
014 A00AA88 ZAO "UFG Invest"
014 B00AA88 8-000000

015 A00AA01 STATE STREET BANK & TRUST CO.
015 B00AA01 C
015 C01AA01 BOSTON
015 C02AA01 MA
015 C03AA01 02111
015 E01AA01 X
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 106
019 C00AA00 DWSFUNDSSS
021 000000 0
022 A000001 CHASE SECURITIES INC.
022 B000001 13-3112953
022 C000001 113664676
022 D000001 0
022 A000002 CITIGROUP
022 B000002 13-3082694
022 C000002 42871581
022 D000002 0
022 A000003 CREDIT SUISSE
022 B000003 05-0546650
022 C000003 40456500
022 D000003 0
022 A000004 BANK OF AMERICA CORP.
022 B000004 13-4078651
022 C000004 32697423
022 D000004 0
022 A000005 NATIONAL FINANCIAL
022 B000005 39-1909295
022 C000005 29015000
022 D000005 0
022 A000006 BARCLAYS CAPITAL INC.
022 B000006 06-1031656
022 C000006 26844538
022 D000006 18373
022 A000007 STATE STREET BANK & TRUST CO.
022 B000007 04-1867445
022 C000007 13430794
022 D000007 0
022 A000008 GOLDMAN SACHS & CO.
022 B000008 13-3175029
022 C000008 5933262
022 D000008 0
022 A000009 NOMURA SECURITIES INTERNATIONAL, INC.
022 B000009 13-2642206
022 C000009 3169402
022 D000009 0
022 A000010 DAIWA SECURITIES GROUP, INC.
022 B000010 13-5680329
022 C000010 938685
022 D000010 32078

023 C000000 311163840
023 D000000 163192
024 000200 N
024 000300 N
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A010200 1987475
028 A020200 18
028 A030200 0
028 A040200 1485025
028 B010200 1991272
028 B020200 22
028 B030200 0
028 B040200 2085494
028 C010200 2184999
028 C020200 16
028 C030200 0
028 C040200 2438929
028 D010200 1403247
028 D020200 17
028 D030200 0
028 D040200 1506064
028 E010200 1943199
028 E020200 18
028 E030200 0
028 E040200 2165370
028 F010200 1598732
028 F020200 14
028 F030200 0
028 F040200 1562760
028 G010200 11108924
028 G020200 105
028 G030200 0
028 G040200 11243642
028 H000200 0
028 A010300 1892618
028 A020300 210
028 A030300 0
028 A040300 1951156
028 B010300 1771403
028 B020300 132
028 B030300 0
028 B040300 1746169

028 C010300 1999144
028 C020300 0
028 C030300 0
028 C040300 1682204
028 D010300 1583159
028 D020300 200
028 D030300 0
028 D040300 1607880
028 E010300 1409589
028 E020300 139
028 E030300 0
028 E040300 1720126
028 F010300 1744085
028 F020300 135
028 F030300 0
028 F040300 1678530
028 G010300 10399998
028 G020300 816
028 G030300 0
028 G040300 10386065
028 H000300 0
029 00AA00 N
030 A00AA00 0
030 B00AA00 0.00
030 C00AA00 0.00
031 A00AA00 0
031 B00AA00 0
032 00AA00 0
033 00AA00 0
034 00AA00 N
035 00AA00 0
036 B00AA00 0
037 000200 N
037 000300 N
038 000200 0
038 000300 0
039 000200 Y
039 000300 Y
040 000200 Y
040 000300 N
042 A000200 0
042 B000200 0
042 C000200 100
042 D000200 0
042 E000200 0
042 F000200 0
042 G000200 0
042 H000200 0
042 A000300 0
042 B000300 0
042 C000300 100

042 D000300 0
042 E000300 0
042 F000300 0
042 G000300 0
042 H000300 0
043 000200 1962
043 000300 0
044 000200 0
044 000300 0
045 000200 Y
045 000300 Y
046 000200 N
046 000300 N
047 000200 Y
047 000300 N
048 000200 0.050
048 A010200 0
048 A020200 0.000
048 B010200 0
048 B020200 0.000
048 C010200 0
048 C020200 0.000
048 D010200 0
048 D020200 0.000
048 E010200 0
048 E020200 0.000
048 F010200 0
048 F020200 0.000
048 G010200 0
048 G020200 0.000
048 H010200 0
048 H020200 0.000
048 I010200 0
048 I020200 0.000
048 J010200 0
048 J020200 0.000
048 K010200 0
048 K020200 0.000
048 000300 0.000
048 A010300 0
048 A020300 0.000
048 B010300 0
048 B020300 0.000
048 C010300 0
048 C020300 0.000
048 D010300 0
048 D020300 0.000
048 E010300 0
048 E020300 0.000
048 F010300 0
048 F020300 0.000

048 G010300 0
048 G020300 0.000
048 H010300 0
048 H020300 0.000
048 I010300 0
048 I020300 0.000
048 J010300 0
048 J020300 0.000
048 K010300 0
048 K020300 0.000
049 000200 N
049 000300 N
050 000200 N
050 000300 N
051 000200 N
051 000300 N
052 000200 N
052 000300 N
053 A000200 Y
053 B000200 Y
053 C000200 N
053 A000300 Y
053 B000300 Y
053 C000300 N
054 A00AA00 Y
054 B00AA00 Y
054 C00AA00 Y
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 N
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 N
054 M00AA00 Y
054 N00AA00 N
054 O00AA00 Y
055 A000200 N
055 B000200 N
055 A000300 N
055 B000300 N
056 000200 Y
056 000300 Y
057 000200 N
057 000300 N
058 A000200 N
058 A000300 N
059 000200 Y
059 000300 Y

060 A000200 Y
060 B000200 Y
060 A000300 Y
060 B000300 Y
061 000200 50
061 000300 0
062 A000200 Y
062 B000200 31.6
062 C000200 0.0
062 D000200 66.2
062 E000200 0.0
062 F000200 0.0
062 G000200 0.0
062 H000200 0.0
062 I000200 0.0
062 J000200 0.0
062 K000200 0.0
062 L000200 0.0
062 M000200 0.0
062 N000200 0.0
062 O000200 0.0
062 P000200 0.0
062 Q000200 0.0
062 R000200 0.0
062 A000300 Y
062 B000300 56.3
062 C000300 0.0
062 D000300 36.7
062 E000300 0.0
062 F000300 0.0
062 G000300 0.0
062 H000300 0.0
062 I000300 5.9
062 J000300 0.0
062 K000300 0.0
062 L000300 0.0
062 M000300 0.0
062 N000300 0.0
062 O000300 0.0
062 P000300 0.0
062 Q000300 0.0
062 R000300 0.0
063 A000200 39
063 B000200 0.0
063 A000300 46
063 B000300 0.0
064 A000200 N
064 B000200 N
064 A000300 N
064 B000300 N
066 A000200 N

066 A000300 N
067 000200 N
067 000300 N
068 A000200 N
068 B000200 N
068 A000300 N
068 B000300 N
069 000200 N
069 000300 N
070 A010200 Y
070 A020200 Y
070 B010200 N
070 B020200 N
070 C010200 N
070 C020200 N
070 D010200 N
070 D020200 N
070 E010200 N
070 E020200 N
070 F010200 N
070 F020200 N
070 G010200 N
070 G020200 N
070 H010200 N
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 Y
070 J020200 N
070 K010200 N
070 K020200 N
070 L010200 N
070 L020200 N
070 M010200 N
070 M020200 N
070 N010200 N
070 N020200 N
070 O010200 Y
070 O020200 N
070 P010200 Y
070 P020200 N
070 Q010200 N
070 Q020200 N
070 R010200 N
070 R020200 N
070 A010300 Y
070 A020300 Y
070 B010300 N
070 B020300 N
070 C010300 N
070 C020300 N

070 D010300 N
070 D020300 N
070 E010300 N
070 E020300 N
070 F010300 N
070 F020300 N
070 G010300 N
070 G020300 N
070 H010300 N
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 Y
070 J020300 N
070 K010300 Y
070 K020300 N
070 L010300 Y
070 L020300 N
070 M010300 N
070 M020300 N
070 N010300 N
070 N020300 N
070 O010300 Y
070 O020300 N
070 P010300 Y
070 P020300 N
070 Q010300 N
070 Q020300 N
070 R010300 N
070 R020300 N
071 A000200 0
071 B000200 0
071 C000200 0
071 D000200 0
071 A000300 0
071 B000300 0
071 C000300 0
071 D000300 0
072 A000200 6
072 B000200 2766
072 C000200 0
072 D000200 0
072 E000200 0
072 F000200 932
072 G000200 1865
072 H000200 0
072 I000200 905
072 J000200 27
072 K000200 0
072 L000200 52
072 M000200 78

072 N000200 56
072 O000200 0
072 P000200 0
072 Q000200 0
072 R000200 36
072 S000200 20
072 T000200 1962
072 U000200 0
072 V000200 0
072 W000200 71
072 X000200 6004
072 Y000200 3424
072 Z000200 186
072AA000200 0
072BB000200 18
072CC010200 0
072CC020200 0
072DD010200 141
072DD020200 45
072EE000200 0
072 A000300 6
072 B000300 984
072 C000300 0
072 D000300 0
072 E000300 0
072 F000300 0
072 G000300 588
072 H000300 0
072 I000300 30
072 J000300 14
072 K000300 0
072 L000300 15
072 M000300 25
072 N000300 0
072 O000300 0
072 P000300 0
072 Q000300 0
072 R000300 31
072 S000300 9
072 T000300 0
072 U000300 0
072 V000300 0
072 W000300 12
072 X000300 724
072 Y000300 556
072 Z000300 816
072AA000300 0
072BB000300 6
072CC010300 0
072CC020300 0
072DD010300 816

072DD020300 0
072EE000300 0
073 A010200 0.0000
073 A020200 0.0000
073 B000200 0.0000
073 C000200 0.0000
073 A010300 0.0000
073 A020300 0.0000
073 B000300 0.0000
073 C000300 0.0000
074 A000200 0
074 B000200 2513544
074 C000200 0
074 D000200 1197473
074 E000200 0
074 F000200 0
074 G000200 0
074 H000200 0
074 I000200 0
074 J000200 78000
074 K000200 14
074 L000200 6651
074 M000200 80
074 N000200 3795762
074 O000200 0
074 P000200 449
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 334
074 S000200 0
074 T000200 3794979
074 U010200 2872315
074 U020200 922656
074 V010200 0.00
074 V020200 0.00
074 W000200 1.0000
074 X000200 4611
074 Y000200 0
074 A000300 12000
074 B000300 403767
074 C000300 64994
074 D000300 619742
074 E000300 0
074 F000300 0
074 G000300 0
074 H000300 0
074 I000300 0
074 J000300 0
074 K000300 0

074 L000300 593
074 M000300 8
074 N000300 1101104
074 O000300 0
074 P000300 10
074 Q000300 0
074 R010300 0
074 R020300 0
074 R030300 0
074 R040300 57
074 S000300 0
074 T000300 1101037
074 U010300 1100363
074 U020300 0
074 V010300 0.00
074 V020300 0.00
074 W000300 1.0006
074 X000300 0
074 Y000300 0
075 A000200 3719442
075 B000200 0
075 A000300 1173588
075 B000300 0
076 000200 0.00
076 000300 0.00
077 A000000 N
078 000000 N
080 C00AA00 0
081 B00AA00 0
082 B00AA00 0
083 B00AA00 0
084 B00AA00 0
086 A010000 0
086 A020000 0
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
SIGNATURE PAUL SCHUBERT
TITLE TREASURER