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, 2010

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 14, 2010

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:    110

Form 13F Information Table Value Total:    $1,740,075 (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    28-10162                      FIG Advisors LLC
8    28-13249                      Fortress Commodities Advisors LLC
9    28-13498                      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
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
AIRCASTLE LTD                  COM              G0129K104    36933  3900000 SH       DEFINED 1 2 3 4 6     3900000        0        0
AIRCASTLE LTD                  COM              G0129K104   205973 21750002 SH       DEFINED 1 2 3 4      21750002        0        0
AIRCASTLE LTD                  COM              G0129K104     2707   285875 SH       DEFINED 1 2 3          285875        0        0
ALLIED HEALTHCARE INTL INC     COM              01923A109     2561   941445 SH       DEFINED 1 2 3          941445        0        0
AMERICAN CAP LTD               COM              02503Y103      849   167137 SH       DEFINED 1 2 3 4        167137        0        0
AMERICAN CAP LTD               COM              02503Y103    22222  4374364 SH       DEFINED 1 2 3 4 6     4374364        0        0
AMGEN INC                      COM              031162100      539     9000 SH       DEFINED 1 2 3            9000        0        0
ANADARKO PETE CORP             COM              032511107        2    93700 SH  CALL DEFINED 1 2 3 4 8           0        0        0
ANADARKO PETE CORP             COM              032511107        1    26000 SH  CALL DEFINED 1 2 3 4 9           0        0        0
ANGLOGOLD ASHANTI LTD          SPONSORED ADR    035128206     3960   104334 SH       DEFINED 1 2 3          104334        0        0
ANSWERS CORP                   COM              03662X100     3009   359905 SH       DEFINED 1 2 3          359905        0        0
ARCH COAL INC                  COM              039380100      425    18600 SH       DEFINED 1 2 3 4 9       18600        0        0
ARCH COAL INC                  COM              039380100     1531    67000 SH       DEFINED 1 2 3 4 8       67000        0        0
BAKER HUGHES INC               COM              057224107     1100    23479 SH       DEFINED 1 2 3 4 8       23479        0        0
BAKER HUGHES INC               COM              057224107      304     6500 SH       DEFINED 1 2 3 4 9        6500        0        0
BARRICK GOLD CORP              COM              067901108       15   153900 SH  CALL DEFINED 1 2 3 4 8           0        0        0
BARRICK GOLD CORP              COM              067901108        4    42700 SH  CALL DEFINED 1 2 3 4 9           0        0        0
BROOKDALE SR LIVING INC        COM              112463104   715933 34370292 SH       DEFINED 1 2 3 4      34370292        0        0
BROOKDALE SR LIVING INC        COM              112463104     1775    85176 SH       DEFINED 1 2 3 4 6       85176        0        0
CORCEPT THERAPEUTICS INC       COM              218352102     1857   651286 SH       DEFINED 1 2 3          651286        0        0
DENBURY RES INC                COM NEW          247916208     1694   100400 SH       DEFINED 1 2 3 4 8      100400        0        0
DENBURY RES INC                COM NEW          247916208      471    27900 SH       DEFINED 1 2 3 4 9       27900        0        0
DEVON ENERGY CORP NEW          COM              25179M103     3660    56800 SH       DEFINED 1 2 3 4 8       56800        0        0
DEVON ENERGY CORP NEW          COM              25179M103    16513   256300 SH       DEFINED 1 2 3 4 9      256300        0        0
DIAMOND OFFSHORE DRILLING IN   COM              25271C102     2707    30975 SH       DEFINED 1 2 3 4         30975        0        0
DOW CHEM CO                    COM              260543103       72   176300 SH  CALL DEFINED 1 2 3 4 9           0        0        0
DOW CHEM CO                    COM              260543103      261   635600 SH  CALL DEFINED 1 2 3 4 8           0        0        0
DOW CHEM CO                    COM              260543103      550    18600 SH       DEFINED 1 2 3 4 9       18600        0        0
DOW CHEM CO                    COM              260543103     1981    67000 SH       DEFINED 1 2 3 4 8       67000        0        0
EASTMAN KODAK CO               COM              277461109      191    33000 SH       DEFINED 1 2 3 4 9       33000        0        0
EBAY INC                       COM              278642103     4659   172876 SH       DEFINED 1 2 3 4 9      172876        0        0
EMULEX CORP                    COM NEW          292475209      514    38700 SH       DEFINED 1 2 3           38700        0        0
ESTERLINE TECHNOLOGIES CORP    COM              297425100      554    11200 SH       DEFINED 1 2 3           11200        0        0
FORD MTR CO DEL                COM PAR $0.01    345370860       23   300000 SH  PUT  DEFINED 1 2 3 4 9      300000        0        0
FREEPORT-MCMORAN COPPER & GO   COM              35671D857     3918    46900 SH       DEFINED 1 2 3 4 8       46900        0        0
FREEPORT-MCMORAN COPPER & GO   COM              35671D857     1086    13000 SH       DEFINED 1 2 3 4 9       13000        0        0
GENERAL GROWTH PPTYS INC       COM              370021107      504    31338 SH       DEFINED 1 2 3 4         31338        0        0
GOLD FIELDS LTD NEW            SPONSORED ADR    38059T106     2549   202000 SH       DEFINED 1 2 3          202000        0        0
HALLIBURTON CO                 COM              406216101       23   936700 SH  CALL DEFINED 1 2 3 4 8           0        0        0
HALLIBURTON CO                 COM              406216101        6   259800 SH  CALL DEFINED 1 2 3 4 9           0        0        0
HALLIBURTON CO                 COM              406216101      298     9900 SH       DEFINED 1 2 3 4 9        9900        0        0
HALLIBURTON CO                 COM              406216101     1077    35740 SH       DEFINED 1 2 3 4 8       35740        0        0
HEXCEL CORP NEW                COM              428291108      599    41500 SH       DEFINED 1 2 3           41500        0        0
HURON CONSULTING GROUP INC     COM              447462102      434    21400 SH       DEFINED 1 2 3           21400        0        0
IGO INC                        COM              449593102      538   267680 SH       DEFINED 1 2 3          267680        0        0
ISHARES TR INDEX               FTSE XNHUA IDX   464287184       48   736000 SH  PUT  DEFINED 1 2 3 4 8      736000        0        0
ISHARES TR INDEX               FTSE XNHUA IDX   464287184       13   204200 SH  PUT  DEFINED 1 2 3 4 9      204200        0        0
ISHARES TR INDEX               FTSE XNHUA IDX   464287184      939    22300 SH       DEFINED 1 2 3 4 9       22300        0        0
ISHARES TR INDEX               FTSE XNHUA IDX   464287184     3381    80300 SH       DEFINED 1 2 3 4 8       80300        0        0
ISHARES TR INDEX               RUSSELL 2000     464287655     3131  2734400 SH  PUT  DEFINED 1 2 3 4 9     2734400        0        0
MAGUIRE PPTYS INC              COM              559775101       64    20755 SH       DEFINED 1 2 3 4         20755        0        0
MAGUIRE PPTYS INC              COM              559775101     1215   394353 SH       DEFINED 1 2 3 4 6      394353        0        0
MCDONALDS CORP                 COM              580135101     7005   104990 SH       DEFINED 1 2 3 4 9      104990        0        0
MGM MIRAGE                     COM              552953101       30   273500 SH  PUT  DEFINED 1 2 3 4 9      273500        0        0
MORGAN STANLEY                 COM NEW          617446448      513    17500 SH       DEFINED 1 2 3           17500        0        0
NEWCASTLE INVT CORP            COM              65105M108      618   191600 SH       DEFINED 1 2 3          191600        0        0
NEWCASTLE INVT CORP            COM              65105M108     3313  1025729 SH       DEFINED 1             1025729        0        0
NEWFIELD EXPL CO               COM              651290108     1395    26800 SH       DEFINED 1 2 3 4 8       26800        0        0
NEWFIELD EXPL CO               COM              651290108     3238    62200 SH       DEFINED 1 2 3 4 9       62200        0        0
NOBLE ENERGY INC               COM              655044105     3176    43500 SH       DEFINED 1 2 3 4 8       43500        0        0
NOBLE ENERGY INC               COM              655044105     7804   106900 SH       DEFINED 1 2 3 4 9      106900        0        0
NORTH AMERN PALLADIUM LTD      COM              656912102      493   120800 SH       DEFINED 1 2 3          120800        0        0
NORTHWESTERN CORP              COM NEW          668074305    22664   845347 SH       DEFINED 1 2 3 4        845347        0        0
NPS PHARMACEUTICALS INC        COM              62936P103     1559   309425 SH       DEFINED 1 2 3          309425        0        0
NUCOR CORP                     COM              670346105        5    25000 SH  CALL DEFINED 1 2 3 4 9           0        0        0
NUCOR CORP                     COM              670346105        4    37500 SH  PUT  DEFINED 1 2 3 4 9       37500        0        0
OCCIDENTAL PETE CORP DEL       COM              674599105    18387   217500 SH       DEFINED 1 2 3 4 8      217500        0        0
OCCIDENTAL PETE CORP DEL       COM              674599105     9731   115100 SH       DEFINED 1 2 3 4 9      115100        0        0
ODYSSEY MARINE EXPLORATION I   COM              676118102      616   470362 SH       DEFINED 1 2 3 4 5      470362        0        0
PAETEC HOLDING CORP            COM              695459107      564   120500 SH       DEFINED 1 2 3          120500        0        0
PEABODY ENERGY CORP            COM              704549104      379     8300 SH       DEFINED 1 2 3 4 9        8300        0        0
PEABODY ENERGY CORP            COM              704549104     1416    30994 SH       DEFINED 1 2 3 4 8       30994        0        0
PENN NATL GAMING INC           COM              707569109     4389   157823 SH       DEFINED 1 2 3 4        157823        0        0
PETROHAWK ENERGY CORP          COM              716495106     1562    77000 SH       DEFINED 1 2 3 4 8       77000        0        0
PETROHAWK ENERGY CORP          COM              716495106      434    21400 SH       DEFINED 1 2 3 4 9       21400        0        0
RAILAMERICA INC                COM              750753402   358130 30350000 SH       DEFINED 1 2 3 4      30350000        0        0
ROYAL BK SCOTLAND GROUP PLC    ADR PFD SER P    780097762      142    11250 SH       DEFINED 1 2 3 4         11250        0        0
ROYAL BK SCOTLAND GROUP PLC    ADR PFD SER P    780097762     2699   213750 SH       DEFINED 1 2 3 4 6      213750        0        0
ROYAL BK SCOTLAND GROUP PLC    ADR PREF SHS R   780097747      130    10375 SH       DEFINED 1 2 3 4         10375        0        0
ROYAL BK SCOTLAND GROUP PLC    ADR PREF SHS R   780097747     2476   197125 SH       DEFINED 1 2 3 4 6      197125        0        0
ROYAL BK SCOTLAND GROUP PLC    SP ADR L RP PF   780097788     1075    66965 SH       DEFINED 1 2 3 4 6       66965        0        0
ROYAL BK SCOTLAND GROUP PLC    SP ADR L RP PF   780097788      485    30210 SH       DEFINED 1 2 3           30210        0        0
ROYAL BK SCOTLAND GROUP PLC    SP ADR L RP PF   780097788       57     3525 SH       DEFINED 1 2 3 4          3525        0        0
ROYAL BK SCOTLAND GROUP PLC    SP ADR PREF M    780097796     2413   190000 SH       DEFINED 1 2 3 4 6      190000        0        0
ROYAL BK SCOTLAND GROUP PLC    SP ADR PREF M    780097796      127    10000 SH       DEFINED 1 2 3 4         10000        0        0
SCHLUMBERGER LTD               COM              806857108     1117    17600 SH       DEFINED 1 2 3 4 8       17600        0        0
SCHLUMBERGER LTD               COM              806857108      305     4800 SH       DEFINED 1 2 3 4 9        4800        0        0
SELECT SECTOR SPDR TR          SBI CONS STPLS   81369Y308    12102   433600 SH       DEFINED 1 2 3 4 9      433600        0        0
SELECT SECTOR SPDR TR          SBI HEALTHCARE   81369Y209    31112   969839 SH       DEFINED 1 2 3 4 9      969839        0        0
SELECT SECTOR SPDR TR          SBI INT-FINL     81369Y605   109901  6881700 SH       DEFINED 1 2 3 4 9     6881700        0        0
SILICON IMAGE INC              COM              82705T102      608   201400 SH       DEFINED 1 2 3          201400        0        0
SOFTWARE HOLDRS TR             DEPOSITRY RCPT   83404B103     9654   227200 SH       DEFINED 1 2 3 4 9      227200        0        0
SPDR SERIES TRUST              S&P RETAIL ETF   78464A714      788  1185000 SH  PUT  DEFINED 1 2 3 4 9     1185000        0        0
SPEEDWAY MOTORSPORTS INC       COM              847788106      465    29800 SH       DEFINED 1 2 3           29800        0        0
SUNCOR ENERGY INC NEW          COM              867224107     7289   224000 SH       DEFINED 1 2 3 4 9      224000        0        0
SUNCOR ENERGY INC NEW          COM              867224107    10019   307900 SH       DEFINED 1 2 3 4 8      307900        0        0
SUNOCO INC                     COM              86764P109     3705   124700 SH       DEFINED 1 2 3 4 8      124700        0        0
SUNOCO INC                     COM              86764P109    11373   382805 SH       DEFINED 1 2 3 4 9      382805        0        0
TENNECO INC                    COM              880349105     2850   120500 SH       DEFINED 1 2 3 4 8      120500        0        0
TENNECO INC                    COM              880349105      790    33400 SH       DEFINED 1 2 3 4 9       33400        0        0
TRW AUTOMOTIVE HLDGS CORP      COM              87264S106     2678    93700 SH       DEFINED 1 2 3 4 8       93700        0        0
TRW AUTOMOTIVE HLDGS CORP      COM              87264S106      429    15000 SH       DEFINED 1 2 3 4 9       15000        0        0
VARIAN SEMICONDUCTOR EQUIPMN   COM              922207105     5607   169300 SH       DEFINED 1 2 3 4 9      169300        0        0
WAL MART STORES INC            COM              931142103    12405   223114 SH       DEFINED 1 2 3 4 9      223114        0        0
WCA WASTE CORP                 COM              92926K103     1041   204444 SH       DEFINED 1 2 3 4        204444        0        0
WEATHERFORD INTERNATIONAL LT   REG              H27013103      314    19814 SH       DEFINED 1 2 3 4 9       19814        0        0
WEATHERFORD INTERNATIONAL LT   REG              H27013103     1134    71500 SH       DEFINED 1 2 3 4 8       71500        0        0
WHX CORP                       COM PAR $.01 NEW 929248607      267   108733 SH       DEFINED 1 2 3          108733        0        0
WILLBROS GROUP INC DEL         COM              969203108      545    45350 SH       DEFINED 1 2 3 4         45350        0        0
YAHOO INC                      COM              984332106     1175    71100 SH       DEFINED 1 2 3 4 9       71100        0        0