Duff & Phelps Investment Management

Duff & Phelps Investement Management as of Dec. 31, 2011

Portfolio Holdings for Duff & Phelps Investement Management

Duff & Phelps Investement Management holds 0 positions in its portfolio as reported in the December 2011 quarterly 13F filing

                {C}              {C}       {C}      {C}               {C}     {C}          {C}       {C}     {C}
                                                          FORM 13F INFORMATION TABLE
                                                           VALUE   SHARES/  SH/ PUT/ INVSTMT    OTHER          VOTING AUTHORITY
NAME OF ISSUER                 TITLE OF CLASS   CUSIP NO  (x$1000) PRN AMT  PRN CALL DSCRETN  MANAGERS    SOLE  SHARED     NONE
------------------------------ ---------------- --------- -------- -------- --- ---- ------- --------- ------- ------- --------

3M Co                          Common Stock     88579Y101    1454    17785 SH       SOLE               17785
Abbott Laboratories            Common Stock     002824100    2227    39610 SH       SOLE               39610
AGL Resources Inc              Common Stock     001204106   21130   500000 SH       SOLE              500000
Alcoa Inc                      Common Stock     013817101     234    27070 SH       SOLE               27070
Alexandria R E Equities Inc    REIT             015271109   11258   163232 SH       SOLE              162378               854
Allete Inc                     Common Stock     018522300     920    21920 SH       SOLE               21920
Alliant Energy Corp            Common Stock     018802108   66165  1500000 SH       SOLE             1500000
Allstate Corp                  Common Stock     020002101     354    12930 SH       SOLE               12930
Altria Group Inc               Common Stock     02209S103    1551    52320 SH       SOLE               52320
Amazon.Com Inc                 Common Stock     023135106    1601     9250 SH       SOLE                9250
American Electric Power        Common Stock     025537101     217     5255 SH       SOLE                5255
American Express Co            Common Stock     025816109    4521    95840 SH       SOLE               95840
American Tower Corp            Common Stock     029912201    3334    55550 SH       SOLE               55550
American Water Works Co        Common Stock     030420103   31860  1000000 SH       SOLE             1000000
Amgen Inc                      Common Stock     031162100    1298    20220 SH       SOLE               20220
Apache Corp                    Common Stock     037411105     886     9785 SH       SOLE                9785
Apartment Investment & Mgt     REIT             03748R101   29778  1299779 SH       SOLE             1292972              6807
Apple Computer Inc             Common Stock     037833100    8916    22015 SH       SOLE               22015
AT & T Inc.                    Common Stock     00206R102  116546  3854037 SH       SOLE             3854037
Automatic Data Processing      Common Stock     053015103    4017    74383 SH       SOLE               74383
Avalonbay Communities Inc      REIT             053484101   58720   449619 SH       SOLE              447257              2362
Avon Products                  Common Stock     054303102    1747    99979 SH       SOLE               99979
Baker Hughes Inc               Common Stock     057224107     539    11090 SH       SOLE               11090
Bank of America Corp           Common Stock     060505104    2195   394745 SH       SOLE              394745
Bank of New York Mellon Corp   Common Stock     064058100    2021   101496 SH       SOLE              101496
Baxter International Inc       Common Stock     071813109     706    14275 SH       SOLE               14275
BCE Inc                        Foreign Common   05534B760    1271    30500 SH       SOLE               30500
Berkshire Hathaway             Common Stock     084670702    3412    44718 SH       SOLE               44718
Biomed Realty Trust Inc        REIT             09063H107   23902  1322008 SH       SOLE             1315019              6989
Boardwalk Pipeline Prtnrs      Master Ltd Part  096627104   16661   602139 SH       SOLE              602139
Boeing Co                      Common Stock     097023105    1386    18900 SH       SOLE               18900
Boston Properties Inc          REIT             101121101   71610   718978 SH       SOLE              715230              3748
BRE Properties                 REIT             05564E106   23331   462184 SH       SOLE              459714              2470
Bristol-Myers Squibb Co        Common Stock     110122108    1519    43095 SH       SOLE               43095
Buckeye Partners               Master Ltd Part  118230101   26501   414200 SH       SOLE              414200
Camden Property Trust          REIT             133131102   36910   593027 SH       SOLE              589837              3190
Campus Crest Communities       REIT             13466Y105    2393   237869 SH       SOLE              236565              1304
Capital One Financial Co       Common Stock     14040H105    3299    78010 SH       SOLE               78010
Caterpillar Inc                Common Stock     149123101    5354    59100 SH       SOLE               59100
Centerpoint Energy Inc         Common Stock     15189T107   63301  3150870 SH       SOLE             3150870
CenturyLink Inc                Common Stock     156700106   99696  2680000 SH       SOLE             2680000
Chevron Corp                   Common Stock     166764100    9380    88160 SH       SOLE               88160
Cisco Systems Inc              Common Stock     17275R102    5048   279200 SH       SOLE              279200
Citigroup Inc                  Common Stock     172967424    1956    74363 SH       SOLE               74363
CMS Energy Corp                Common Stock     125896100   56849  2574690 SH       SOLE             2574690
Coca-Cola Co                   Common Stock     191216100    4043    57775 SH       SOLE               57775
Colgate-Palmolive Co           Common Stock     194162103    1138    12315 SH       SOLE               12315
Comcast Corp                   Common Stock     20030N101    1644    69325 SH       SOLE               69325
Conocophillips                 Common Stock     20825C104    7043    96651 SH       SOLE               96651
Copano Energy LLC              Master Ltd Part  217202100    8149   238270 SH       SOLE              238270
Costco Wholesale Corp          Common Stock     22160K105     916    10995 SH       SOLE               10995
Crown Castle Intl Corp         Common Stock     228227104    2629    58690 SH       SOLE               58690
CubeSmart                      REIT             229663109   12170  1143825 SH       SOLE             1137786              6039
CVS Caremark Corp              Common Stock     126650100    1350    33110 SH       SOLE               33110
DCP Midstream Partners         Master Ltd Part  23311P100    9004   189684 SH       SOLE              189684
DDR Corp                       REIT             23317H102   27223  2236871 SH       SOLE             2225032             11839
Dell Inc                       Common Stock     24702R101     568    38850 SH       SOLE               38850
Devon Energy Corporation       Common Stock     25179M103     647    10440 SH       SOLE               10440
Digital Realty Trust Inc       REIT             253868103   21532   322966 SH       SOLE              321293              1673
Dominion Resources Inc         Common Stock     25746U109   76529  1441770 SH       SOLE             1441770
DOW Chemical Co                Common Stock     260543103     864    30050 SH       SOLE               30050
DTE Energy Co                  Common Stock     233331107   36034   661780 SH       SOLE              661780
DU Pont [E I] De Nemours       Common Stock     263534109    3219    70310 SH       SOLE               70310
Duke Energy Corp               Common Stock     26441C105   35068  1594000 SH       SOLE             1594000
Duke Realty Corp               REIT             264411505   32830  2724452 SH       SOLE             2710395             14057
EMC Corp                       Common Stock     268648102    1115    51770 SH       SOLE               51770
Emerson Electric Co            Common Stock     291011104    5046   108305 SH       SOLE              108305
Enbridge Energy Partners       Master Ltd Part  29250R106   27410   825861 SH       SOLE              825861
Enbridge Inc                   Foreign Common   29250N105   68726  1837090 SH       SOLE             1837090
Energy Transfer Partners       Master Ltd Part  29273R109   26162   570600 SH       SOLE              570600
Entergy Corp                   Common Stock     29364G103   94298  1290865 SH       SOLE             1290865
Enterprise Prods Prtnrs        Master Ltd Part  293792107   30142   649900 SH       SOLE              649900
Equity Lifestyle Properties    REIT             29472R108   35386   530604 SH       SOLE              527846              2758
Equity Residential             REIT             29476L107   81498  1429037 SH       SOLE             1421322              7715
Essex Property Trust           REIT             297178105   40885   290977 SH       SOLE              289473              1504
Exelon Corp                    Common Stock     30161N101   43684  1007230 SH       SOLE             1007230
Extra Space Storage Inc        REIT             30225T102   43954  1814028 SH       SOLE             1804496              9532
Exxon Mobil Corp               Common Stock     30231G102   15091   178040 SH       SOLE              178040
Fedex Corp                     Common Stock     31428X106     667     7985 SH       SOLE                7985
Firstenergy Corp               Common Stock     337932107   83106  1875980 SH       SOLE             1875980
Ford Motor Co                  Common Stock     345370860    1040    96660 SH       SOLE               96660
Freeprt McMoran Cop and Gld    Common Stock     35671D857     887    24120 SH       SOLE               24120
Frontier Communications Corp   Common Stock     35906A108   43201  8388491 SH       SOLE             8388491
General Dynamics Corp          Common Stock     369550108     601     9055 SH       SOLE                9055
General Electric Co            Common Stock     369604103    7021   392023 SH       SOLE              392023
General Growth Pptys Inc       REIT             370023103   28641  1906865 SH       SOLE             1896138             10727
Gilead Sciences Inc            Common Stock     375558103     787    19240 SH       SOLE               19240
Goldman Sachs Group Inc        Common Stock     38141G104    1140    12610 SH       SOLE               12610
Google Inc                     Common Stock     38259P508    4147     6420 SH       SOLE                6420
Great Plains Energy Inc        Common Stock     391164100   10890   500000 SH       SOLE              500000
Halliburton Co                 Common Stock     406216101    4504   130500 SH       SOLE              130500
HCP Inc                        REIT             40414L109   46757  1128581 SH       SOLE             1122515              6066
Health Care Reit Inc           REIT             42217K106   47488   870856 SH       SOLE              866218              4638
Heinz [H J] Co                 Common Stock     423074103     440     8150 SH       SOLE                8150
Hewlett-Packard Co             Common Stock     428236103    1296    50305 SH       SOLE               50305
Home Depot Inc                 Common Stock     437076102    1647    39185 SH       SOLE               39185
Honeywell International Inc    Common Stock     438516106    1067    19630 SH       SOLE               19630
Host Hotels & Resorts Inc      REIT             44107P104   55409  3751442 SH       SOLE             3731225             20217
Illinois Tool Works            Common Stock     452308109    2779    59500 SH       SOLE               59500
Integrys Energy Group Inc      Common Stock     45822P105   31804   587000 SH       SOLE              587000
Intel Corp                     Common Stock     458140100    7002   288730 SH       SOLE              288730
Intl Business Machines Corp    Common Stock     459200101   12296    66870 SH       SOLE               66870
Intl Flavors & Fragrances      Common Stock     459506101    4069    77620 SH       SOLE               77620
iShares                        Exchange Traded  464287465   13601   274605 SH       SOLE              274605
iShares                        Exchange Traded  464287606    4326    43820 SH       SOLE               43820
iShares                        Exchange Traded  464287630    7776   118460 SH       SOLE              118460
iShares                        Exchange Traded  464287648    4222    50120 SH       SOLE               50120
iShares                        Exchange Traded  464287705    7857   103410 SH       SOLE              103410
iShares                        Exchange Traded  464288638   45369   423295 SH       SOLE              423295
iShares                        Exchange Traded  464288646   77129   740204 SH       SOLE              740204
ITC Holdings Corp              Common Stock     465685105    1963    25870 SH       SOLE               25870
J P Morgan Chase & Co          Common Stock     46625H100    6832   205480 SH       SOLE              205480
Johnson & Johnson              Common Stock     478160104    7824   119300 SH       SOLE              119300
Johnson Controls Inc           Common Stock     478366107    1847    59095 SH       SOLE               59095
Kilroy Realty Corp             REIT             49427F108   49055  1288540 SH       SOLE             1281725              6815
Kimberly-Clark Corp            Common Stock     494368103    3070    41730 SH       SOLE               41730
Kimco Realty Corp              REIT             49446R109   31694  1951571 SH       SOLE             1941413             10158
Kinder Morgan Energy Partners  Master Ltd Part  494550106   24890   293000 SH       SOLE              293000
Kraft Foods Inc                Common Stock     50075N104    1679    44935 SH       SOLE               44935
Lasalle Hotel Properties       REIT             517942108   26858  1109377 SH       SOLE             1103523              5854
Lilly [Eli] & Co               Common Stock     532457108    2337    56220 SH       SOLE               56220
Lockheed Martin Corp           Common Stock     539830109     544     6725 SH       SOLE                6725
Lowe's Companies Inc           Common Stock     548661107     809    31860 SH       SOLE               31860
Macerich Co                    REIT             554382101   17444   344745 SH       SOLE              342925              1820
MasterCard Inc                 Common Stock     57636Q104    6612    17735 SH       SOLE               17735
McDonald's Corp                Common Stock     580135101    7419    73945 SH       SOLE               73945
Medtronic Inc                  Common Stock     585055106    2781    72715 SH       SOLE               72715
Merck &  Co Inc.               Common Stock     58933Y105    6428   170493 SH       SOLE              170493
Metlife Inc                    Common Stock     59156R108     839    26910 SH       SOLE               26910
Microsoft Corp                 Common Stock     594918104    8068   310793 SH       SOLE              310793
Monsanto Co                    Common Stock     61166W101     954    13620 SH       SOLE               13620
Morgan Stanley                 Common Stock     617446448     571    37740 SH       SOLE               37740
National Grid Plc              ADRs             636274300    9147   188673 SH       SOLE              188673
National Oilwell Varco Inc     Common Stock     637071101     733    10785 SH       SOLE               10785
News Corp Cl A                 Common Stock     65248E104     995    55790 SH       SOLE               55790
NextEra Energy Inc             Common Stock     65339F101   84339  1385330 SH       SOLE             1385330
Nike Inc                       Common Stock     654106103     914     9485 SH       SOLE                9485
Nippon Telegraph & Telephone   ADRs             654624105    1343    53010 SH       SOLE               53010
Nisource Inc                   Common Stock     65473P105   49259  2068850 SH       SOLE             2068850
Norfolk Southern Corp          Common Stock     655844108     623     8550 SH       SOLE                8550
Northeast Utilities            Common Stock     664397106   73346  2033440 SH       SOLE             2033440
Northwest Natural Gas Co       Common Stock     667655104   39522   824580 SH       SOLE              824580
NV Energy Inc                  Common Stock     67073Y106   50419  3083740 SH       SOLE             3083740
Occidental Petroleum Corp      Common Stock     674599105    1934    20645 SH       SOLE               20645
Omnicom Group                  Common Stock     681919106    3872    86845 SH       SOLE               86845
Oneok Inc                      Common Stock     682680103   60368   696370 SH       SOLE              696370
Oracle Corp                    Common Stock     68389X105    2568   100100 SH       SOLE              100100
Pepco Holdings Inc             Common Stock     713291102   72471  3570000 SH       SOLE             3570000
Pepsico Inc                    Common Stock     713448108    5562    83825 SH       SOLE               83825
Pfizer Inc                     Common Stock     717081103    7323   338408 SH       SOLE              338408
Philip Morris International    Common Stock     718172109    3468    44185 SH       SOLE               44185
Piedmont Natural Gas Co        Common Stock     720186105   33980  1000000 SH       SOLE             1000000
Pinnacle West Capital Corp     Common Stock     723484101   72270  1500000 SH       SOLE             1500000
PPL Corp                       Common Stock     69351T106   74874  2545000 SH       SOLE             2545000
Procter & Gamble Co            Common Stock     742718109    4669    69990 SH       SOLE               69990
Prologis Inc                   REIT             74340W103   54117  1892868 SH       SOLE             1884340              8528
Public Service Entrp Grp Inc   Common Stock     744573106   60994  1847730 SH       SOLE             1847730
Public Storage                 REIT             74460D109   89486   665521 SH       SOLE              662033              3488
Qualcomm Inc                   Common Stock     747525103    2339    42755 SH       SOLE               42755
Questar Corp                   Common Stock     748356102   30593  1540410 SH       SOLE             1540410
Raytheon Co                    Common Stock     755111507     428     8840 SH       SOLE                8840
Regency Centers Corp           REIT             758849103   18591   494166 SH       SOLE              491509              2657
Schlumberger Ltd               Common Stock     806857108    2331    34130 SH       SOLE               34130
Sempra Energy                  Common Stock     816851109   57120  1038540 SH       SOLE             1038540
Simon Property Group Inc       REIT             828806109  176566  1369362 SH       SOLE             1362086              7276
SL Green Realty Corp           REIT             78440X101   31676   475325 SH       SOLE              472893              2432
Southern Co                    Common Stock     842587107   71774  1550540 SH       SOLE             1550540
Spectra Energy Corp            Common Stock     847560109   53458  1738470 SH       SOLE             1738470
Sprint Nextel Corp             Common Stock     852061100     178    76210 SH       SOLE               76210
Starwood Hotels & Resorts Wrld REIT             85590A401    2688    56027 SH       SOLE               55727               300
Targa Resources Partners       Master Ltd Part  87611X105   22199   595465 SH       SOLE              595465
Target Corp                    Common Stock     87612E106     875    17075 SH       SOLE               17075
Taubman Centers Inc            REIT             876664103   44212   711944 SH       SOLE              708174              3770
TC Pipelines LP                Master Ltd Part  87233Q108   16782   353834 SH       SOLE              353834
TECO Energy Inc                Common Stock     872375100   57420  3000000 SH       SOLE             3000000
Teekay LNG Partners            Master Ltd Part  Y8564M105   14589   439820 SH       SOLE              439820
Teekay Offshore Partners       Master Ltd Part  Y8565J101   10239   384919 SH       SOLE              384919
Telefonica SA                  ADRs             879382208    1804   104940 SH       SOLE              104940
Texas Instruments Inc          Common Stock     882508104     845    29025 SH       SOLE               29025
Time Warner Inc                Common Stock     887317303     916    25349 SH       SOLE               25349
TJX Companies Inc              Common Stock     872540109    3201    49590 SH       SOLE               49590
Transcanada Corp               Foreign Common   89353D107   50094  1147110 SH       SOLE             1147110
U S Bancorp                    Common Stock     902973304    1313    48542 SH       SOLE               48542
UDR Inc                        REIT             902653104   31322  1247893 SH       SOLE             1241441              6452
Union Pacific Corp             Common Stock     907818108    1298    12250 SH       SOLE               12250
United Parcel Service          Common Stock     911312106    1797    24555 SH       SOLE               24555
United Technologies Corp       Common Stock     913017109    1683    23030 SH       SOLE               23030
UnitedHealth Group Inc         Common Stock     91324P102    1371    27055 SH       SOLE               27055
Vanguard                       Exchange Traded  922042858    3565    93300 SH       SOLE               93300
Vectren Corp                   Common Stock     92240G101   45345  1500000 SH       SOLE             1500000
Ventas Inc                     REIT             92276F100   91043  1651425 SH       SOLE             1642850              8575
Verizon Communications Inc     Common Stock     92343V104   95226  2373523 SH       SOLE             2373523
Visa Inc                       Common Stock     92826C839    1313    12935 SH       SOLE               12935
Vodafone Group PLC             ADRs             92857W209   37290  1330370 SH       SOLE             1330370
Vornado Realty Trust           REIT             929042109   53879   700997 SH       SOLE              697050              3947
Wal-Mart Stores                Common Stock     931142103    5207    87140 SH       SOLE               87140
Walgreen Co                    Common Stock     931422109    3331   100766 SH       SOLE              100766
Walt Disney Co                 Common Stock     254687106    1714    45700 SH       SOLE               45700
Weingarten Realty Invst        REIT             948741103   19954   914489 SH       SOLE              909634              4855
Wellpoint Inc                  Common Stock     94973V107    3181    48010 SH       SOLE               48010
Wells Fargo & Co               Common Stock     949746101    4502   163344 SH       SOLE              163344
Westar Energy Inc              Common Stock     95709T100   83059  2886000 SH       SOLE             2886000
WGL Holdings Inc               Common Stock     92924F106   44220  1000000 SH       SOLE             1000000
Williams Cos Inc               Common Stock     969457100    8191   248060 SH       SOLE              248060
Windstream Corp                Common Stock     97381W104   87931  7489890 SH       SOLE             7489890
Wisconsin Energy Corp          Common Stock     976657106   51028  1459600 SH       SOLE             1459600
XCEL Energy Inc                Common Stock     98389B100   84499  3057140 SH       SOLE             3057140
Xerox Corp                     Common Stock     984121103     280    35120 SH       SOLE               35120