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

                                    Form 13F

                              Form 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: September 30, 2008

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:  28-12421

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     November 14, 2008

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:         13

Form13F Information Table Entry Total:     92

Form13F Information Table Value Total:     $2,219,202 (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    28-12421                      Fortress Investment Group LLC
2    28-12417                      FIG Corp
3    28-12418                      Fortress Operating Entity I LP
4    28-10806                      FIG LLC
5    28-10807                      Drawbridge Global Macro Advisors LLC
6    28-11237                      Drawbridge Special Opportunities Advisors LLC
7    28-11538                      Fortress Fund MM LLC
8    28-11537                      Fortress Fund MM II LLC
9    28-10162                      FIG Advisors LLC
10   28-12420                      RIC Coinvestment Fund GP LLC
11   28-12416                      Fortress Investment Fund GP Holdings LLC
12   28-12512                      Fortress Fund III GP LLC
13   28-12439                      Fortress Operating Entity II LP
14   28-NEW                        Fortress Commodities 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
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
2020 CHINACAP ACQUIRCO INC     COM              90212G109     3163   437000 SH       DEFINED 1 2 3 4 6      437000        0        0
ADVANCED TECHNOLOGY ACQU COR   UNIT 06/11/2011  007556202    14163  1856250 SH       DEFINED 1 2 3 4 6     1856250        0        0
AIRCASTLE LTD                  COM              G0129K104    41483  4185875 SH       DEFINED 1 2 3 4 6     4185875        0        0
AIRCASTLE LTD                  COM              G0129K104   215543 21750002 SH       DEFINED 1 2 11 12 13 21750002        0        0
AIRCASTLE LTD                  COM              G0129K104    35924  3625000 SH       DEFINED 1 2 3 4 5     3625000        0        0
ALTERNATIVE ASSET MGMT ACQU    COM              02149U101    10352  1150300 SH       DEFINED 1 2 3 4 6     1150300        0        0
ALTERNATIVE ASSET MGMT ACQU    *W EXP 08/01/201 02149U119      388  1210250 SH       DEFINED 1 2 3 4 6     1210250        0        0
ANGLOGOLD ASHANTI LTD          SPONSORED ADR    035128206     2410   104334 SH       DEFINED 1 2 3 4 6      104334        0        0
ASIA SPECIAL SIT ACQST CORP    SHS              G0538M105     5818   650000 SH       DEFINED 1 2 3 4 6      650000        0        0
BALLY TECHNOLOGIES INC         COM              05874B107     3785   125000 SH       DEFINED 1 2 3 4 5      125000        0        0
BROOKDALE SR LIVING INC        COM              112463104   387043 17600867 SH       DEFINED 1 2 10 13    17600867        0        0
BROOKDALE SR LIVING INC        COM              112463104   218339  9929000 SH       DEFINED 1 2 3 4 7 9   9929000        0        0
BROOKDALE SR LIVING INC        COM              112463104     2749   125000 SH       DEFINED 1 2 3 4 6      125000        0        0
BROOKDALE SR LIVING INC        COM              112463104   730684 33228000 SH       DEFINED 1 2 3 4 8 9  33228000        0        0
CAL MAINE FOODS INC            COM NEW          128030202      519    18900 SH       DEFINED 1 2 3 4 14      18900        0        0
CAPITOL ACQUISITION CORP DEL   COM              14055E104     9000  1000000 SH       DEFINED 1 2 3 4 6     1000000        0        0
CAPITOL ACQUISITION CORP DEL   *W EXP 11/08/201 14055E112       16    55950 SH       DEFINED 1 2 3 4 5       55950        0        0
CAPITOL ACQUISITION CORP DEL   *W EXP 11/08/201 14055E112      232   750000 SH       DEFINED 1 2 3 4 6      750000        0        0
CATERPILLAR INC DEL            COM              149123101    22350   375000 SH  PUT  DEFINED 1 2 3 4 14     375000        0        0
CHINA HLDGS ACQUISITION CORP   UNIT 99/99/9999  16942N205     7920   990000 SH       DEFINED 1 2 3 4 6      990000        0        0
COLUMBUS ACQUISITION CORP      *W EXP 05/18/201 198851115       11    72700 SH       DEFINED 1 2 3 4 6       72700        0        0
COLUMBUS ACQUISITION CORP      COM              198851107     2280   300000 SH       DEFINED 1 2 3 4 6      300000        0        0
DANA HOLDING CORP              COM              235825205     6218  1284588 SH       DEFINED 1 2 3 4 6     1284588        0        0
DIAMOND OFFSHORE DRILLING IN   COM              25271C102     3192    30975 SH       DEFINED 1 2 13          30975        0        0
ENTERPRISE ACQUISITION CORP    UNIT 99/99/9999  29365R207     1772   184600 SH       DEFINED 1 2 3 4 5      184600        0        0
ENTERPRISE ACQUISITION CORP    UNIT 99/99/9999  29365R207     4626   500000 SH       DEFINED 1 2 3 4 6      500000        0        0
EVOLUTION PETROLEUM CORP       COM              30049A107     3838  1323500 SH       DEFINED 1 2 3 4 5     1323500        0        0
GATEHOUSE MEDIA INC            COM              367348109      654  1334011 SH       DEFINED 1 2 3 4 5     1334011        0        0
GATEHOUSE MEDIA INC            COM              367348109    10805 22050000 SH       DEFINED 1 2 11 12 13 22050000        0        0
GATEHOUSE MEDIA INC            COM              367348109      453   925800 SH       DEFINED 1 2 3 4 6      925800        0        0
GENERAL ELECTRIC CO            COM              369604103    49725  1950000 SH  PUT  DEFINED 1 2 3 4 14    1950000        0        0
GENERAL ELECTRIC CO            COM              369604103     6375   250000 SH       DEFINED 1 2 3 4 14     250000        0        0
GENERAL GROWTH PPTYS INC       COM              370021107      467    30900 SH       DEFINED 1 2 13          30900        0        0
GENESIS LEASE LTD              ADR              37183T107     2491   285000 SH       DEFINED 1 2 3 4 6      285000        0        0
GLOBAL BRANDS ACQUISITION CO   COM              378982102      923   100299 SH       DEFINED 1 2 3 4 5      100299        0        0
GLOBAL BRANDS ACQUISITION CO   UNIT 99/99/9999  378982201     5661   599079 SH       DEFINED 1 2 3 4 5      599079        0        0
GLOBAL BRANDS ACQUISITION CO   UNIT 99/99/9999  378982201    14176  1500000 SH       DEFINED 1 2 3 4 6     1500000        0        0
GLOBAL CONSUMER ACQST CORP     *W EXP 11/27/201 378983118      138   511000 SH       DEFINED 1 2 3 4 6      511000        0        0
GLOBAL CONSUMER ACQST CORP     COM              378983100     3063   338500 SH       DEFINED 1 2 3 4 6      338500        0        0
GLOBAL CONSUMER ACQST CORP     UNIT 99/99/9999  378983209      600    64500 SH       DEFINED 1 2 3 4 6       64500        0        0
GOLD FIELDS LTD NEW            SPONSORED ADR    38059T106     1937   202000 SH       DEFINED 1 2 3 4 6      202000        0        0
GOLDEN POND HEALTHCARE INC     UNIT 99/99/9999  38116J208     5692   750000 SH       DEFINED 1 2 3 4 6      750000        0        0
GOLDMAN SACHS GROUP INC        COM              38141G104     5568    43500 SH  CALL DEFINED 1 2 3 4 5       43500        0        0
GRAFTECH INTL LTD              COM              384313102     8251   546000 SH       DEFINED 1 2 3 4 6      546000        0        0
HECKMANN CORP                  COM              422680108      232    28200 SH       DEFINED 1 2 3 4 6       28200        0        0
HECKMANN CORP                  *W EXP 11/09/201 422680116      690   324100 SH       DEFINED 1 2 3 4 5      324100        0        0
HICKS ACQUISITION CO I INC     COM              429086309     5370   600000 SH       DEFINED 1 2 3 4 6      600000        0        0
HIGHLANDS ACQUISITION CORP     COM              430880104     3608   400000 SH       DEFINED 1 2 3 4 6      400000        0        0
IDEATION ACQUISITION CORP      UNIT 99/99/9999  451665202     1812   250000 SH       DEFINED 1 2 3 4 6      250000        0        0
ISHARES TR                     MSCI EMERG MKT   464287234    24171   700000 SH  PUT  DEFINED 1 2 3 4 14     700000        0        0
KAPSTONE PAPER & PACKAGING C   COM              48562P103     3112   490000 SH       DEFINED 1 2 3 4 5      490000        0        0
KBL HEALTHCARE ACQUIS CORP I   UNIT 99/99/9999  48241N206     4804   658100 SH       DEFINED 1 2 3 4 6      658100        0        0
LEHMAN BROS HLDGS INC          COM              524908100      215  1000000 SH  CALL DEFINED 1 2 3 4 5     1000000        0        0
LIBERTY ACQUISITION HLDGS CO   COM              53015Y107     5997   673800 SH       DEFINED 1 2 3 4 6      673800        0        0
LINN ENERGY LLC                UNIT LTD LIAB    536020100     6694   437500 SH       DEFINED 1 2 3 4 6      437500        0        0
MBF HEALTHCARE ACQUISITION C   *W EXP 04/16/201 552650111      106   528750 SH       DEFINED 1 2 3 4 6      528750        0        0
MECHEL OAO                     SPONSORED ADR    583840103     3143   175000 SH  CALL DEFINED 1 2 3 4 14     175000        0        0
MIRANT CORP NEW                COM              60467R100    10517   575000 SH       DEFINED 1 2 3 4 6      575000        0        0
NAVIOS MARITIME ACQUIS CORP    UNIT 99/99/9999  Y62159127    11576  1250000 SH       DEFINED 1 2 3 4 6     1250000        0        0
NEWCASTLE                      COM              65105M108     6515  1025729 SH       DEFINED 1             1025729        0        0
NEWCASTLE INVT CORP            COM              65105M108     1217   191600 SH       DEFINED 1 2 3 4 6      191600        0        0
NIKE INC                       CL B             654106103     6690   100000 SH  PUT  DEFINED 1 2 3 4 5      100000        0        0
NORTHWEST AIRLS CORP           COM              667280408       92    10238 SH       DEFINED 1 2 3 4 6       10238        0        0
NORTHWESTERN CORP              COM NEW          668074305    21244   845347 SH       DEFINED 1 2 13         845347        0        0
ODYSSEY MARINE EXPLORATION I   COM              676118102      872   192000 SH       DEFINED 1 2 3 4 6      192000        0        0
ODYSSEY MARINE EXPLORATION I   COM              676118102    17416  3836094 SH       DEFINED 1 2 3 4 5     3836094        0        0
OIL SVC HOLDRS TR              DEPOSTRY RCPT    678002106    54279   370000 SH  CALL DEFINED 1 2 3 4 14     370000        0        0
PENN NATL GAMING INC           COM              707569109     4181   157377 SH       DEFINED 1 2 13         157377        0        0
PROSPECT ACQUISITION CORP      UNIT 99/99/9999  74347T202     8554   924800 SH       DEFINED 1 2 3 4 6      924800        0        0
PROSPECT ACQUISITION CORP      COM              74347T103     1820   200000 SH       DEFINED 1 2 3 4 6      200000        0        0
RADIOSHACK CORP                COM              750438103     1728   100000 SH       DEFINED 1 2 3 4 5      100000        0        0
RESEARCH IN MOTION LTD         COM              760975102     1776    26000 SH  CALL DEFINED 1 2 3 4 5       26000        0        0
SAPPHIRE INDUSTRIALS CORP      UNIT 99/99/9999  80306T208     9150  1000000 SH       DEFINED 1 2 3 4 6     1000000        0        0
SELECT SECTOR SPDR TR          SBI INT-FINL     81369Y605    10343   520000 SH       DEFINED 1 2 3 4 5      520000        0        0
SMITHFIELD FOODS INC           COM              832248108    25408  1600000 SH  CALL DEFINED 1 2 3 4 14    1600000        0        0
STONELEIGH PARTNERS ACQUS CO   COM              861923100     9419  1247500 SH       DEFINED 1 2 3 4 6     1247500        0        0
STONELEIGH PARTNERS ACQUS CO   *W EXP 05/31/201 861923126       76   500000 SH       DEFINED 1 2 3 4 6      500000        0        0
TARGA RESOURCES PARTNERS LP    COM UNIT         87611X105     2412   141700 SH       DEFINED 1 2 3 4 6      141700        0        0
TERRA INDS INC                 COM              880915103     1764    60000 SH       DEFINED 1 2 3 4 14      60000        0        0
TREEHOUSE FOODS INC            COM              89469A104     2875    96800 SH       DEFINED 1 2 3 4 5       96800        0        0
TREMISIS ENERGY ACQ CORP II    UNIT 99/99/9999  89472N200     7976  1100000 SH       DEFINED 1 2 3 4 6     1100000        0        0
TRIAN ACQUISITION I CORP       UNIT 99/99/9999  89582E207     7303   798200 SH       DEFINED 1 2 3 4 6      798200        0        0
TRIPLECROWN ACQUISITION CORP   COM              89677G109      637    71949 SH       DEFINED 1 2 3 4 5       71949        0        0
TRIPLECROWN ACQUISITION CORP   COM              89677G109    24249  2740000 SH       DEFINED 1 2 3 4 6     2740000        0        0
TRIPLECROWN ACQUISITION CORP   *W EXP 10/22/201 89677G117      750  2501700 SH       DEFINED 1 2 3 4 6     2501700        0        0
TRIPLECROWN ACQUISITION CORP   UNIT 07/12/2012  89677G208      514    57800 SH       DEFINED 1 2 3 4 6       57800        0        0
UNITED REFINING ENERGY CORP    UNIT 12/11/2011  911360204    14752  1600000 SH       DEFINED 1 2 3 4 6     1600000        0        0
VICTORY ACQUISITION CORP       *W EXP 04/24/201 92644D118      147   367000 SH       DEFINED 1 2 3 4 6      367000        0        0
VICTORY ACQUISITION CORP       COM              92644D100    14240  1499000 SH       DEFINED 1 2 3 4 6     1499000        0        0
WILLBROS GROUP INC             COM              969199108     1202    45350 SH       DEFINED 1 2 13          45350        0        0
WILLIAMS COS INC DEL           COM              969457100     6809   287900 SH       DEFINED 1 2 3 4 6      287900        0        0
WYETH                          COM              983024100    19948   540000 SH  CALL DEFINED 1 2 3 4 5      540000        0        0