UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                    Form 13F

                              Form 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: March 31, 2011

Check here if Amendment [  ]; Amendment Number:
This Amendment (Check only one.): [  ] is a restatement.
                                  [  ] adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:    Fortress Investment Group LLC
Address: 1345 Avenue of the Americas, 46th Flr.
         New York, NY  10105

13F File Number:  028-12421

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:

Name:      David Brooks
Title:     Secretary, VP and General Counsel
Phone:     212-798-6100

Signature, Place, and Date of Signing:

  /s/  David Brooks     New York, NY     May 16, 2011

Report Type (Check only one.):

[ X]         13F HOLDINGS REPORT.

[  ]         13F NOTICE.

[  ]         13F COMBINATION REPORT.



                              FORM 13F SUMMARY PAGE

Report Summary:

Number of Other Included Managers:         8

Form 13F Information Table Entry Total:    160

Form 13F Information Table Value Total:    $2,108,119 (thousands)

List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s) of all
institutional managers with respect to which this report is filed, other
than the manager filing this report.

No.  13F File Number            Name

1    028-12421                  Fortress Investment Group LLC
2    028-12417                  FIG Corp
3    028-12418                  Fortress Operating Entity I LP
4    028-10806                  FIG LLC
5    028-10807                  Drawbridge Global Macro Advisors LLC
6    028-11237                  Drawbridge Special Opportunities Advisors LLC
7    028-10162                  FIG Advisors LLC
8    028-13249                  Fortress Commodities Advisors LLC
9    028-13498                  Fortress Macro Advisors LLC



                                    
                                                     FORM 13F INFORMATION TABLE
                                                             VALUE  SHARES/ SH/ PUT/ INVSTMT  OTHER            VOTING AUTHORITY
NAME OF ISSUER                 TITLE OF CLASS   CUSIP     (x$1000)  PRN AMT PRN CALL DSCRETN MANAGERS         SOLE   SHARED     NONE
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
ABOVENET INC                   COM              00374N107     5903    91000 SH       DEFINED 1 2 3           91000        0        0
AIRCASTLE LTD                  COM              G0129K104     3450   285875 SH       DEFINED 1 2 3          285875        0        0
AIRCASTLE LTD                  COM              G0129K104   262523 21750002 SH       DEFINED 1 2 3 4      21750002        0        0
ALLIED HEALTHCARE INTL INC     COM              01923A109     1900   748245 SH       DEFINED 1 2 3          748245        0        0
AMERICAN CAP LTD               COM              02503Y103    93363  9421140 SH       DEFINED 1 2 3 4       9421140        0        0
AMERICAN CAP LTD               COM              02503Y103    22035  2223498 SH       DEFINED 1 2 3 4 6     2223498        0        0
AMERISTAR CASINOS INC          COM              03070Q101     3146   177200 SH       DEFINED 1 2 3          177200        0        0
ANADARKO PETE CORP             COM              032511107     2540    31000 SH       DEFINED 1 2 3 4 9       31000        0        0
ANADARKO PETE CORP             COM              032511107     8192   100000 SH  CALL DEFINED 1 2 3 4 9      100000        0        0
ANADARKO PETE CORP             COM              032511107     3383    41300 SH       DEFINED 1 2 3 4 8       41300        0        0
ANADARKO PETE CORP             COM              032511107     1520    18553 SH       DEFINED 1 2 3 4         18553        0        0
ANGLOGOLD ASHANTI LTD          SPONSORED ADR    035128206     5003   104334 SH       DEFINED 1 2 3          104334        0        0
APACHE CORP                    COM              037411105      510     3900 SH       DEFINED 1 2 3 4          3900        0        0
APACHE CORP                    COM              037411105     1519    11600 SH       DEFINED 1 2 3 4 9       11600        0        0
AUTONAVI HLDGS LTD             SPONSORED ADR    05330F106      682    38529 SH       DEFINED 1 2 3 4         38529        0        0
AUTONAVI HLDGS LTD             SPONSORED ADR    05330F106     2016   113814 SH       DEFINED 1 2 3 4 9      113814        0        0
BAIDU INC                      SPON ADR REP A   056752108      254     1850 SH       DEFINED 1 2 3 4          1850        0        0
BAIDU INC                      SPON ADR REP A   056752108      741     5375 SH       DEFINED 1 2 3 4 9        5375        0        0
BASIC ENERGY SVCS INC NEW      COM              06985P100     4906   192300 SH       DEFINED 1 2 3 4 8      192300        0        0
BASIC ENERGY SVCS INC NEW      COM              06985P100     1457    57100 SH       DEFINED 1 2 3 4 9       57100        0        0
BASIC ENERGY SVCS INC NEW      COM              06985P100     1457    57100 SH       DEFINED 1 2 3 4         57100        0        0
BLOCK H & R INC                COM              093671105     3492   300000 SH  PUT  DEFINED 1 2 3 4 9      300000        0        0
BROOKDALE SR LIVING INC        COM              112463104   492627 17593827 SH       DEFINED 1 2 3 4      17593827        0        0
CAMECO CORP                    COM              13321L108     2102    70000 SH       DEFINED 1 2 3           70000        0        0
CBS CORP NEW                   CL B             124857202     1507    60204 SH       DEFINED 1 2 3 4         60204        0        0
CBS CORP NEW                   CL B             124857202     4454   177872 SH       DEFINED 1 2 3 4 9      177872        0        0
CF INDS HLDGS INC              COM              125269100     1368    10000 SH       DEFINED 1 2 3 4 9       10000        0        0
CF INDS HLDGS INC              COM              125269100    27358   200000 SH  CALL DEFINED 1 2 3 4 9      200000        0        0
CHEVRON CORP NEW               COM              166764100     1568    14600 SH       DEFINED 1 2 3 4 8       14600        0        0
CHEVRON CORP NEW               COM              166764100      462     4300 SH       DEFINED 1 2 3 4 9        4300        0        0
CHEVRON CORP NEW               COM              166764100      462     4300 SH       DEFINED 1 2 3 4          4300        0        0
CIMAREX ENERGY CO              COM              171798101     2259    19600 SH       DEFINED 1 2 3 4 8       19600        0        0
CIMAREX ENERGY CO              COM              171798101      668     5800 SH       DEFINED 1 2 3 4 9        5800        0        0
CIMAREX ENERGY CO              COM              171798101      669     5800 SH       DEFINED 1 2 3 4          5800        0        0
CITIGROUP INC                  COM              172967101     1023   231400 SH       DEFINED 1 2 3 4        231400        0        0
CITIGROUP INC                  COM              172967101    25061  5669912 SH       DEFINED 1 2 3 4 6     5669912        0        0
CITIGROUP INC                  COM              172967101     3019   683000 SH       DEFINED 1 2 3 4 9      683000        0        0
CITIGROUP INC                  COM              172967101     2532   572800 SH  CALL DEFINED 1 2 3 4        572800        0        0
CITIGROUP INC                  COM              172967101     7472  1690600 SH  CALL DEFINED 1 2 3 4 9     1690600        0        0
COMPLETE PRODUCTION SERVICES   COM              20453E109      563    17700 SH       DEFINED 1 2 3 4         17700        0        0
COMPLETE PRODUCTION SERVICES   COM              20453E109     1896    59600 SH       DEFINED 1 2 3 4 8       59600        0        0
COMPLETE PRODUCTION SERVICES   COM              20453E109      563    17700 SH       DEFINED 1 2 3 4 9       17700        0        0
CVR ENERGY INC                 COM              12662P108      678    29300 SH       DEFINED 1 2 3 4         29300        0        0
CVR ENERGY INC                 COM              12662P108     2284    98600 SH       DEFINED 1 2 3 4 8       98600        0        0
CVR ENERGY INC                 COM              12662P108      676    29200 SH       DEFINED 1 2 3 4 9       29200        0        0
DANAHER CORP DEL               COM              235851102      982    18903 SH       DEFINED 1 2 3 4         18903        0        0
DANAHER CORP DEL               COM              235851102    14617   281630 SH       DEFINED 1 2 3 4 6      281630        0        0
DIAMOND OFFSHORE DRILLING IN   COM              25271C102     2407    30975 SH       DEFINED 1 2 3 4         30975        0        0
EASTMAN KODAK CO               COM              277461109     3206   700000 SH  PUT  DEFINED 1 2 3 4 9      700000        0        0
EL PASO CORP                   COM              28336L109      282    15700 SH       DEFINED 1 2 3 4         15700        0        0
EL PASO CORP                   COM              28336L109      835    46400 SH       DEFINED 1 2 3 4 9       46400        0        0
ENSCO PLC                      SPONSORED ADR    29358Q109     5917   102300 SH       DEFINED 1 2 3 4 8      102300        0        0
ENSCO PLC                      SPONSORED ADR    29358Q109     1753    30300 SH       DEFINED 1 2 3 4 9       30300        0        0
ENSCO PLC                      SPONSORED ADR    29358Q109     1759    30400 SH       DEFINED 1 2 3 4         30400        0        0
FEDEX CORP                     COM              31428X106    34875   372800 SH  PUT  DEFINED 1 2 3 4        372800        0        0
FEDEX CORP                     COM              31428X106   117387  1254800 SH  PUT  DEFINED 1 2 3 4 8     1254800        0        0
FEDEX CORP                     COM              31428X106    34838   372400 SH  PUT  DEFINED 1 2 3 4 9      372400        0        0
FOCUS MEDIA HLDG LTD           SPONSORED ADR    34415V109     1601    52200 SH       DEFINED 1 2 3 4         52200        0        0
FOCUS MEDIA HLDG LTD           SPONSORED ADR    34415V109     4729   154200 SH       DEFINED 1 2 3 4 9      154200        0        0
FORMFACTOR INC                 COM              346375108      397    38600 SH       DEFINED 1 2 3 4         38600        0        0
FORMFACTOR INC                 COM              346375108     3658   355500 SH  CALL DEFINED 1 2 3 4 9      355500        0        0
FORMFACTOR INC                 COM              346375108     1171   113800 SH       DEFINED 1 2 3 4 9      113800        0        0
FORMFACTOR INC                 COM              346375108     1239   120400 SH  CALL DEFINED 1 2 3 4        120400        0        0
FREEPORT-MCMORAN COPPER & GO   COM              35671D857     8286   150000 SH  CALL DEFINED 1 2 3 4 9      150000        0        0
FRONTIER OIL CORP              COM              35914P105      564    19255 SH       DEFINED 1 2 3 4         19255        0        0
FRONTIER OIL CORP              COM              35914P105     1894    64600 SH       DEFINED 1 2 3 4 8       64600        0        0
FRONTIER OIL CORP              COM              35914P105      563    19214 SH       DEFINED 1 2 3 4 9       19214        0        0
GANNETT INC                    COM              364730101     6092   400000 SH  PUT  DEFINED 1 2 3 4 9      400000        0        0
GENERAL GROWTH PPTYS INC NEW   COM              370023103      485    31338 SH       DEFINED 1 2 3 4         31338        0        0
GOLD FIELDS LTD NEW            SPONSORED ADR    38059T106     3527   202000 SH       DEFINED 1 2 3          202000        0        0
HALLIBURTON CO                 COM              406216101      972    19500 SH       DEFINED 1 2 3 4 9       19500        0        0
HALLIBURTON CO                 COM              406216101      977    19600 SH       DEFINED 1 2 3 4         19600        0        0
HALLIBURTON CO                 COM              406216101     3284    65900 SH       DEFINED 1 2 3 4 8       65900        0        0
HANDY & HARMAN LTD             COM              410315105      304    25336 SH       DEFINED 1 2 3           25336        0        0
HESS CORP                      COM              42809H107      332     3900 SH       DEFINED 1 2 3 4          3900        0        0
HESS CORP                      COM              42809H107     1108    13000 SH       DEFINED 1 2 3 4 8       13000        0        0
HESS CORP                      COM              42809H107      324     3800 SH       DEFINED 1 2 3 4 9        3800        0        0
HOLLY CORP                     COM PAR $0.01    435758305     1197    19700 SH       DEFINED 1 2 3 4 8       19700        0        0
HOLLY CORP                     COM PAR $0.01    435758305      353     5800 SH       DEFINED 1 2 3 4          5800        0        0
HOLLY CORP                     COM PAR $0.01    435758305      358     5900 SH       DEFINED 1 2 3 4 9        5900        0        0
HOWARD HUGHES CORP             COM              44267D107      218     3081 SH       DEFINED 1 2 3 4          3081        0        0
IGO INC                        COM              449593102      755   267680 SH       DEFINED 1 2 3          267680        0        0
ISTAR FINL INC                 COM              45031U101      116    12680 SH       DEFINED 1 2 3 4         12680        0        0
ISTAR FINL INC                 COM              45031U101     1295   141113 SH       DEFINED 1 2 3 4 6      141113        0        0
KEY ENERGY SVCS INC            COM              492914106      695    44700 SH       DEFINED 1 2 3 4         44700        0        0
KEY ENERGY SVCS INC            COM              492914106     2342   150600 SH       DEFINED 1 2 3 4 8      150600        0        0
KEY ENERGY SVCS INC            COM              492914106      695    44700 SH       DEFINED 1 2 3 4 9       44700        0        0
KKR & CO L P DEL               COM UNITS        48248M102     8763   534000 SH       DEFINED 1 2 3          534000        0        0
KKR & CO L P DEL               COM UNITS        48248M102    17877  1089388 SH       DEFINED 1 2 3 4 6     1089388        0        0
LENNAR CORP                    CL A             526057104     5398   370000 SH  PUT  DEFINED 1 2 3 4 9      370000        0        0
LIMITED BRANDS INC             COM              532716107     7891   240000 SH  CALL DEFINED 1 2 3 4 9      240000        0        0
LORILLARD INC                  COM              544147101    63182   665000 SH  PUT  DEFINED 1 2 3 4 9      665000        0        0
LORILLARD INC                  COM              544147101    11401   120000 SH  CALL DEFINED 1 2 3 4 9      120000        0        0
MACYS INC                      COM              55616P104      801    33000 SH       DEFINED 1 2 3 4 9       33000        0        0
MACYS INC                      COM              55616P104    10189   420000 SH  CALL DEFINED 1 2 3 4 9      420000        0        0
MPG OFFICE TR INC              COM              553274101       19     5000 SH       DEFINED 1 2 3 4          5000        0        0
MPG OFFICE TR INC              COM              553274101      279    75285 SH       DEFINED 1 2 3 4 6       75285        0        0
NATIONAL OILWELL VARCO INC     COM              637071101      373     4700 SH       DEFINED 1 2 3 4 9        4700        0        0
NATIONAL OILWELL VARCO INC     COM              637071101      365     4600 SH       DEFINED 1 2 3 4          4600        0        0
NATIONAL OILWELL VARCO INC     COM              637071101     1245    15700 SH       DEFINED 1 2 3 4 8       15700        0        0
NEWCASTLE INVT CORP            COM              65105M108     6195  1025729 SH       DEFINED 1             1025729        0        0
NEWCASTLE INVT CORP            COM              65105M108     1157   191600 SH       DEFINED 1 2 3          191600        0        0
NEWFIELD EXPL CO               COM              651290108      349     4600 SH       DEFINED 1 2 3 4          4600        0        0
NEWFIELD EXPL CO               COM              651290108     1193    15700 SH       DEFINED 1 2 3 4 8       15700        0        0
NEWFIELD EXPL CO               COM              651290108      357     4700 SH       DEFINED 1 2 3 4 9        4700        0        0
NORTHWESTERN CORP              COM NEW          668074305        0        0 SH       DEFINED 1 2 3 4             0        0        0
OCCIDENTAL PETE CORP DEL       COM              674599105     1316    12600 SH       DEFINED 1 2 3 4         12600        0        0
OCCIDENTAL PETE CORP DEL       COM              674599105     2685    25700 SH       DEFINED 1 2 3 4 8       25700        0        0
OCCIDENTAL PETE CORP DEL       COM              674599105     2309    22100 SH       DEFINED 1 2 3 4 9       22100        0        0
OIL SVC HOLDRS TR              DEPOSTRY RCPT    678002106     1873    11400 SH       DEFINED 1 2 3 4         11400        0        0
OIL SVC HOLDRS TR              DEPOSTRY RCPT    678002106    32872   200000 SH  CALL DEFINED 1 2 3 4 9      200000        0        0
OIL SVC HOLDRS TR              DEPOSTRY RCPT    678002106     6344    38600 SH       DEFINED 1 2 3 4 8       38600        0        0
OIL SVC HOLDRS TR              DEPOSTRY RCPT    678002106     1890    11500 SH       DEFINED 1 2 3 4 9       11500        0        0
ON TRACK INNOVATION LTD        SHS              M8791A109     1566   731525 SH       DEFINED 1 2 3          731525        0        0
PENN NATL GAMING INC           COM              707569109     5849   157823 SH       DEFINED 1 2 3 4        157823        0        0
PLAINS EXPL& PRODTN CO         COM              726505100      369    10200 SH       DEFINED 1 2 3 4         10200        0        0
PLAINS EXPL& PRODTN CO         COM              726505100     1250    34500 SH       DEFINED 1 2 3 4 8       34500        0        0
PLAINS EXPL& PRODTN CO         COM              726505100      370    10200 SH       DEFINED 1 2 3 4 9       10200        0        0
PRICELINE COM INC              COM NEW          741503403     2064     4075 SH       DEFINED 1 2 3 4 9        4075        0        0
PRICELINE COM INC              COM NEW          741503403      709     1400 SH       DEFINED 1 2 3 4          1400        0        0
PRIMORIS SVCS CORP             COM              74164F103      307    30231 SH       DEFINED 1 2 3 4         30231        0        0
QUALCOMM INC                   COM              747525103     2610    47600 SH       DEFINED 1 2 3 4         47600        0        0
QUALCOMM INC                   COM              747525103     7709   140595 SH       DEFINED 1 2 3 4 9      140595        0        0
RAILAMERICA INC                COM              750753402   516557 30350000 SH       DEFINED 1 2 3 4      30350000        0        0
REGIONS FINANCIAL CORP NEW     COM              7591EP100     3145   500000 SH  PUT  DEFINED 1 2 3 4 9      500000        0        0
SEALED AIR CORP NEW            COM              81211K100     2053    77000 SH       DEFINED 1 2 3 4 9       77000        0        0
SINA CORP                      ORD              G81477104     1586    14815 SH       DEFINED 1 2 3 4         14815        0        0
SINA CORP                      ORD              G81477104     4678    43700 SH       DEFINED 1 2 3 4 9       43700        0        0
SPANSION INC                   COM CL A NEW     84649R200      568    30436 SH       DEFINED 1 2 3 4         30436        0        0
SPANSION INC                   COM CL A NEW     84649R200     9805   525156 SH       DEFINED 1 2 3 4 6      525156        0        0
SPANSION INC                   COM CL A NEW     84649R200    16284   872214 SH       DEFINED 1 2 3          872214        0        0
SUNCOR ENERGY INC NEW          COM              867224107     2018    45000 SH       DEFINED 1 2 3 4 8       45000        0        0
SUNCOR ENERGY INC NEW          COM              867224107     2883    64300 SH       DEFINED 1 2 3 4 9       64300        0        0
SUNCOR ENERGY INC NEW          COM              867224107     1373    30600 SH       DEFINED 1 2 3 4         30600        0        0
SUPERIOR ENERGY SVCS INC       COM              868157108      496    12100 SH       DEFINED 1 2 3 4         12100        0        0
SUPERIOR ENERGY SVCS INC       COM              868157108     1673    40800 SH       DEFINED 1 2 3 4 8       40800        0        0
SUPERIOR ENERGY SVCS INC       COM              868157108      496    12100 SH       DEFINED 1 2 3 4 9       12100        0        0
TAL INTL GROUP INC             COM              874083108      272     7500 SH       DEFINED 1 2 3 4          7500        0        0
TAL INTL GROUP INC             COM              874083108      798    22000 SH       DEFINED 1 2 3 4 9       22000        0        0
TALISMAN ENERGY INC            COM              87425E103      459    18600 SH       DEFINED 1 2 3 4         18600        0        0
TALISMAN ENERGY INC            COM              87425E103      459    18600 SH       DEFINED 1 2 3 4 9       18600        0        0
TALISMAN ENERGY INC            COM              87425E103     1551    62800 SH       DEFINED 1 2 3 4 8       62800        0        0
TESORO CORP                    COM              881609101     1199    44700 SH       DEFINED 1 2 3 4         44700        0        0
TESORO CORP                    COM              881609101     4041   150600 SH       DEFINED 1 2 3 4 8      150600        0        0
TESORO CORP                    COM              881609101     1199    44700 SH       DEFINED 1 2 3 4 9       44700        0        0
TOTAL S A                      SPONSORED ADR    89151E109      397     6500 SH       DEFINED 1 2 3 4          6500        0        0
TOTAL S A                      SPONSORED ADR    89151E109     1329    21800 SH       DEFINED 1 2 3 4 8       21800        0        0
TOTAL S A                      SPONSORED ADR    89151E109      390     6400 SH       DEFINED 1 2 3 4 9        6400        0        0
TW TELECOM INC                 COM              87311L104     4339   226000 SH       DEFINED 1 2 3          226000        0        0
TYSON FOODS INC                CL A             902494103     3577   230000 SH  PUT  DEFINED 1 2 3 4 9      230000        0        0
V F CORP                       COM              918204108     5778    70000 SH  PUT  DEFINED 1 2 3 4 9       70000        0        0
WCA WASTE CORP                 COM              92926K103     1227        0 SH       DEFINED 1 2 3 4
WHITING PETE CORP NEW          COM              966387102      896    12200 SH       DEFINED 1 2 3 4         12200        0        0
WHITING PETE CORP NEW          COM              966387102     3019    41100 SH       DEFINED 1 2 3 4 8       41100        0        0
WHITING PETE CORP NEW          COM              966387102      896    12200 SH       DEFINED 1 2 3 4 9       12200        0        0
WILLBROS GROUP INC DEL         COM              969203108      495    45350 SH       DEFINED 1 2 3 4         45350        0        0
WYNN RESORTS LTD               COM              983134107     1021     8030 SH       DEFINED 1 2 3 4          8030        0        0
WYNN RESORTS LTD               COM              983134107     3026    23800 SH       DEFINED 1 2 3 4 9       23800        0        0
YAHOO INC                      COM              984332106    14459   876300 SH  CALL DEFINED 1 2 3 4 9      876300        0        0
YAHOO INC                      COM              984332106     4899   296900 SH  CALL DEFINED 1 2 3 4        296900        0        0