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

                                    Form 13F
                               Form 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: 3/31/2013
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:      BLUECREST CAPITAL MANAGEMENT LLP

Address:   BlueCrest House, Glategny Esplanade
           St Peter Port
           Guernsey, GY1 1WR


Form 13F File Number: 028-11935


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 submission.

Persons Signing this Report on Behalf of Reporting Manager:

Name:   Margot Marshall
Title:  Head of Compliance
Phone:  +44 20 3180 3040

Signature,  Place,  and  Date  of  Signing:

/s/ Margot Marshall                London, UK                         5/15/2013
---------------------------------  ---------------------------------  ----------
[Signature]                        [City, State]                      [Date]



Report  Type  (Check  only  one):

[X]     13F HOLDINGS REPORT. (Check here if all holdings of this reporting
        manager are reported in this report.)

[ ]     13F NOTICE. (Check here if no holdings reported are in this report,
        and all holdings are reported by other reporting manager(s).)

[ ]     13F COMBINATION REPORT. (Check here if a portion of the holdings for
        this reporting manager are reported in this report and a portion are
        reported by other reporting manager(s).)

List of Other Managers Reporting for this Manager:




                              Form 13F SUMMARY PAGE

Report Summary:

Number of Other Included Managers:                    0

Form 13F Information Table Entry Total:             107

Form 13F Information Table Value Total:  $    1,118,444
                                         --------------
                                         (In Thousands)


List of Other Included Managers:

Provide a numbered list of the name(s) and 13F file number(s) of all
institutional investment managers with respect to which this report is filed,
other than the manager filing this report.
NONE







                                                  FORM 13F INFORMATION TABLE

          COLUMN 1               COLUMN 2     COLUMN 3  COLUMN 4      COLUMN 5        COLUMN 6  COLUMN 7       COLUMN 8
---------------------------- ---------------- --------- -------- ------------------- ---------- -------- --------------------
                                                         VALUE    SHRS OR   SH/ PUT/ INVESTMENT  OTHER     VOTING AUTHORITY
       NAME OF ISSUER         TITLE OF CLASS    CUSIP   (x$1000)  PRN AMT   PRN CALL DISCRETION MANAGERS SOLE   SHARED   NONE
---------------------------- ---------------- --------- -------- ---------- --- ---- ---------- -------- ---- ---------- ----
                                                                                        
ACCENTURE PLC IRELAND        SHS CLASS A      G1151C101    1,033     13,600 SH       OTHER                  0     13,600    0
ACCURAY INC                  NOTE 3.500% 2/0  004397AC9    6,461  6,000,000 PRN      OTHER                  0          0 NONE
ACCURAY INC                  COM              004397105      186     40,000 SH  CALL OTHER                  0     40,000    0
AFFYMETRIX INC               NOTE 4.000% 7/0  00826TAH1    1,064  1,000,000 PRN      OTHER                  0          0 NONE
AK STL CORP                  NOTE 5.000%11/1  001546AP5    2,863  3,000,000 PRN      OTHER                  0          0 NONE
ALEXION PHARMACEUTICALS INC  COM              015351109    2,764     30,000 SH  CALL OTHER                  0     30,000    0
ALLERGAN INC                 COM              018490102    1,175     10,528 SH       OTHER                  0     10,528    0
AMERICAN EXPRESS CO          COM              025816109      992     14,700 SH  PUT  OTHER                  0     14,700    0
AMERISOURCEBERGEN CORP       COM              03073E105    1,270     24,685 SH       OTHER                  0     24,685    0
AMETEK INC NEW               COM              031100100    1,041     24,000 SH       OTHER                  0     24,000    0
AMTRUST FINANCIAL SERVICES I NOTE 5.500%12/1  032359AC5    2,881  2,000,000 PRN      OTHER                  0          0 NONE
ANADARKO PETE CORP           COM              032511107    1,312     15,000 SH       OTHER                  0     15,000    0
APPLE INC                    COM              037833100    5,622     12,700 SH  CALL OTHER                  0     12,700    0
ARCH COAL INC                COM              039380100    4,344    800,000 SH  CALL OTHER                  0    800,000    0
ASSURED GUARANTY LTD         COM              G0585R106   36,793  1,785,180 SH       OTHER                  0  1,785,180    0
AXIALL CORP                  COM              05463D100    1,989     32,000 SH       OTHER                  0     32,000    0
BAKER HUGHES INC             COM              057224107    2,321     50,000 SH  PUT  OTHER                  0     50,000    0
BANK OF AMERICA CORPORATION  COM              060505104    6,090    500,000 SH  CALL OTHER                  0    500,000    0
BARCLAYS BK PLC              IPATH S&P500 VIX 06740C188   60,750  3,000,000 SH  PUT  OTHER                  0  3,000,000    0
BEAZER HOMES USA INC         COM NEW          07556Q881    4,223    266,599 SH       OTHER                  0    266,599    0
BLOCK H & R INC              COM              093671105    4,413    150,000 SH  PUT  OTHER                  0    150,000    0
CANADIAN NATL RY CO          COM              136375102    1,021     10,000 SH       OTHER                  0     10,000    0
CARDINAL HEALTH INC          COM              14149Y108      916     22,000 SH       OTHER                  0     22,000    0
CATERPILLAR INC DEL          COM              149123101   17,394    200,000 SH       OTHER                  0    200,000    0
CEMEX SAB DE CV              NOTE 3.750% 3/1  151290BC6   12,229  9,000,000 PRN      OTHER                  0          0 NONE
CHESAPEAKE ENERGY CORP       COM              165167107    4,082    200,000 SH  CALL OTHER                  0    200,000    0
CME GROUP INC                COM              12572Q105    1,842     30,000 SH       OTHER                  0     30,000    0
COBALT INTL ENERGY INC       NOTE 2.625%12/0  19075FAA4    2,251  2,000,000 PRN      OTHER                  0          0 NONE
CONTINENTAL RESOURCES INC    COM              212015101      869     10,000 SH       OTHER                  0     10,000    0
CVS CAREMARK CORPORATION     COM              126650100    1,087     19,766 SH       OTHER                  0     19,766    0
DEVON ENERGY CORP NEW        COM              25179M103   16,926    300,000 SH  CALL OTHER                  0    300,000    0
DOVER CORP                   COM              260003108    1,253     17,193 SH       OTHER                  0     17,193    0
E M C CORP MASS              NOTE 1.750%12/0  268648AM4    4,497  3,000,000 PRN      OTHER                  0          0 NONE
ENCORE CAP GROUP INC         NOTE 3.000%11/2  292554AC6    4,549  3,964,000 PRN      OTHER                  0          0 NONE
ENERNOC INC                  COM              292764107      459     26,447 SH       OTHER                  0     26,447    0
ENPRO INDS INC               DBCV 3.938%10/1  29355XAB3    9,205  5,695,000 SH       OTHER                  0  5,695,000    0
EOG RES INC                  COM              26875P101    1,281     10,000 SH       OTHER                  0     10,000    0
FASTENAL CO                  COM              311900104    1,012     19,700 SH       OTHER                  0     19,700    0
FORD MTR CO DEL              COM PAR $0.01    345370860   11,835    900,000 SH  CALL OTHER                  0    900,000    0
FORESTAR GROUP INC           NOTE 3.750% 3/0  346232AB7    3,518  3,000,000 PRN      OTHER                  0          0 NONE
FREEPORT-MCMORAN COPPER & GO COM              35671D857    8,440    255,000 SH       OTHER                  0    255,000    0
FREEPORT-MCMORAN COPPER & GO COM              35671D857    9,930    300,000 SH  CALL OTHER                  0    300,000    0
GAMESTOP CORP NEW            CL A             36467W109    8,391    300,000 SH  CALL OTHER                  0    300,000    0
GENERAL ELECTRIC CO          COM              369604103    5,780    250,000 SH  PUT  OTHER                  0    250,000    0
GENUINE PARTS CO             COM              372460105    1,115     14,300 SH       OTHER                  0     14,300    0
HALLIBURTON CO               COM              406216101    2,425     60,000 SH  PUT  OTHER                  0     60,000    0
HEWLETT PACKARD CO           COM              428236103    4,663    195,600 SH  PUT  OTHER                  0    195,600    0
HONEYWELL INTL INC           COM              438516106    3,768     50,000 SH  PUT  OTHER                  0     50,000    0
ISHARES TR                   FTSE CHINA25 IDX 464287184    9,594    260,000 SH       OTHER                  0    260,000    0
ISHARES TR                   RUSSELL 2000     464287655    2,598     27,560 SH       OTHER                  0     27,560    0
ISHARES TR                   S&P GLB100INDX   464287572   18,047    266,220 SH       OTHER                  0    266,220    0
ISHARES TR                   RUSSELL 2000     464287655   28,962    306,700 SH  PUT  OTHER                  0    306,700    0
JUNIPER NETWORKS INC         COM              48203R104    5,562    300,000 SH  PUT  OTHER                  0    300,000    0
LORILLARD INC                COM              544147101    1,009     25,000 SH       OTHER                  0     25,000    0
LOWES COS INC                COM              548661107    7,584    200,000 SH  CALL OTHER                  0    200,000    0
LOWES COS INC                COM              548661107    7,584    200,000 SH  PUT  OTHER                  0    200,000    0
LYONDELLBASELL INDUSTRIES N  SHS - A -        N53745100      633     10,000 SH       OTHER                  0     10,000    0
M/I HOMES INC                NOTE 3.000% 3/0  55292PAB1    6,181  6,000,000 PRN      OTHER                  0          0 NONE
MAGNA INTL INC               COM              559222401    1,145     19,500 SH       OTHER                  0     19,500    0
MARATHON PETE CORP           COM              56585A102    1,344     15,000 SH       OTHER                  0     15,000    0






                                                  FORM 13F INFORMATION TABLE

          COLUMN 1               COLUMN 2     COLUMN 3  COLUMN 4      COLUMN 5        COLUMN 6  COLUMN 7       COLUMN 8
---------------------------- ---------------- --------- -------- ------------------- ---------- -------- --------------------
                                                         VALUE    SHRS OR   SH/ PUT/ INVESTMENT  OTHER     VOTING AUTHORITY
       NAME OF ISSUER         TITLE OF CLASS    CUSIP   (x$1000)  PRN AMT   PRN CALL DISCRETION MANAGERS SOLE   SHARED   NONE
---------------------------- ---------------- --------- -------- ---------- --- ---- ---------- -------- ---- ---------- ----
                                                                                        
MARKET VECTORS ETF TR        JR GOLD MINERS E 57060U589    2,526    150,915 SH       OTHER                  0    150,915    0
MCKESSON CORP                COM              58155Q103    1,179     10,924 SH       OTHER                  0     10,924    0
MICROCHIP TECHNOLOGY INC     SDCV 2.125%12/1  595017AB0    7,136  5,000,000 SH       OTHER                  0  5,000,000    0
MICRON TECHNOLOGY INC        NOTE 1.875% 8/0  595112AR4    2,349  2,000,000 PRN      OTHER                  0          0 NONE
MICRON TECHNOLOGY INC        COM              595112103    7,980    800,000 SH  CALL OTHER                  0    800,000    0
MOLINA HEALTHCARE INC        COM              60855R100      469     15,200 SH  CALL OTHER                  0     15,200    0
MORGAN STANLEY               COM NEW          617446448    8,792    400,000 SH  PUT  OTHER                  0    400,000    0
NATIONAL OILWELL VARCO INC   COM              637071101   42,450    600,000 SH  CALL OTHER                  0    600,000    0
NAVISTAR INTL CORP NEW       NOTE 3.000%10/1  63934EAL2    1,034  1,000,000 PRN      OTHER                  0          0 NONE
NOBLE ENERGY INC             COM              655044105    1,376     11,895 SH       OTHER                  0     11,895    0
NORFOLK SOUTHERN CORP        COM              655844108    9,897    128,400 SH  PUT  OTHER                  0    128,400    0
NUCOR CORP                   COM              670346105   36,920    800,000 SH  PUT  OTHER                  0    800,000    0
OMNICARE INC                 NOTE 3.750% 4/0  681904AP3    1,701  1,500,000 PRN      OTHER                  0          0 NONE
PARKER HANNIFIN CORP         COM              701094104      999     10,912 SH       OTHER                  0     10,912    0
PBF ENERGY INC               CL A             69318G106      372     10,000 SH       OTHER                  0     10,000    0
PENNEY J C INC               COM              708160106    6,044    400,000 SH  CALL OTHER                  0    400,000    0
PHILLIPS 66                  COM              718546104      560      8,000 SH       OTHER                  0      8,000    0
PIONEER NAT RES CO           COM              723787107    1,864     15,000 SH       OTHER                  0     15,000    0
PROSHARES TR                 PSHS ULTSH 20YRS 74347B201   26,284    400,000 SH  CALL OTHER                  0    400,000    0
RADIAN GROUP INC             NOTE 2.250% 3/0  750236AN1    6,067  5,000,000 PRN      OTHER                  0          0 NONE
ROYAL GOLD INC               COM              780287108      710     10,000 SH  PUT  OTHER                  0     10,000    0
SCHLUMBERGER LTD             COM              806857108      749     10,000 SH       OTHER                  0     10,000    0
SCHLUMBERGER LTD             COM              806857108    3,745     50,000 SH  PUT  OTHER                  0     50,000    0
SELECT SECTOR SPDR TR        SBI INT-ENERGY   81369Y506   10,113    127,500 SH       OTHER                  0    127,500    0
SELECT SECTOR SPDR TR        SBI CONS DISCR   81369Y407    9,741    183,800 SH  PUT  OTHER                  0    183,800    0
SELECT SECTOR SPDR TR        SBI INT-FINL     81369Y605    5,463    300,000 SH  PUT  OTHER                  0    300,000    0
SINA CORP                    ORD              G81477104    7,289    150,000 SH  CALL OTHER                  0    150,000    0
SOLAZYME INC                 COM              83415T101    2,191    280,481 SH       OTHER                  0    280,481    0
SPDR GOLD TRUST              GOLD SHS         78463V107    7,724     50,000 SH  CALL OTHER                  0     50,000    0
SPDR GOLD TRUST              GOLD SHS         78463V107   12,219     79,100 SH  PUT  OTHER                  0     79,100    0
SPDR S&P 500 ETF TR          TR UNIT          78462F103    3,533     22,568 SH       OTHER                  0     22,568    0
SPDR S&P 500 ETF TR          TR UNIT          78462F103    7,834     50,000 SH  PUT  OTHER                  0     50,000    0
TELEFLEX INC                 NOTE 3.875% 8/0  879369AA4    4,384  3,000,000 PRN      OTHER                  0          0 NONE
THERAVANCE INC               NOTE 2.125% 1/1  88338TAB0    1,102  1,000,000 PRN      OTHER                  0          0 NONE
TOWER GROUP INTL LTD         COM              G8988C105    3,690    200,000 SH       OTHER                  0    200,000    0
U S AIRWAYS GROUP INC        COM              90341W108  424,250 25,000,000 SH  CALL OTHER                  0 25,000,000    0
U S AIRWAYS GROUP INC        COM              90341W108    3,946    232,500 SH  PUT  OTHER                  0    232,500    0
U S G CORP                   COM NEW          903293405      793     30,000 SH       OTHER                  0     30,000    0
UNITED PARCEL SERVICE INC    CL B             911312106    7,731     90,000 SH  PUT  OTHER                  0     90,000    0
UNITED STATES OIL FUND LP    UNITS            91232N108    1,738     50,000 SH  CALL OTHER                  0     50,000    0
UNITED STATES OIL FUND LP    UNITS            91232N108   29,534    849,900 SH  PUT  OTHER                  0    849,900    0
UNITED THERAPEUTICS CORP DEL NOTE 1.000% 9/1  91307CAF9    6,879  5,000,000 PRN      OTHER                  0          0 NONE
VERISIGN INC                 SDCV 3.250% 8/1  92343EAD4   11,942  8,040,000 SH       OTHER                  0  8,040,000    0
VERIZON COMMUNICATIONS INC   COM              92343V104    1,302     26,500 SH  PUT  OTHER                  0     26,500    0
WESTERN UN CO                COM              959802109      825     54,854 SH       OTHER                  0     54,854    0
WESTLAKE CHEM CORP           COM              960413102    1,590     17,000 SH       OTHER                  0     17,000    0
XEROX CORP                   COM              984121103      860    100,000 SH  CALL OTHER                  0    100,000    0