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, 2007

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:    UNITRIN, INC.
Address: One East Wacker Drive, 10th Floor
         Chicago, IL  60601

13F File Number:  28-02715

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:      Richard Roeske
Title:     Vice President
Phone:     312-661-4600

Signature, Place, and Date of Signing:

     /s/ Richard Roeske     Chicago, IL     May 02, 2007

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:         1

Form13F Information Table Entry Total:     128

Form13F Information Table Value Total:     $1,243,560 (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

01   28-00121                      TRINITY UNIVERSAL INSURANCE COMPANY



                                    
                                                     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
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
ABBOTT LABS                    COM              002824100     3906    70000 SH       OTHER   01                  0    70000        0
ALPHARMA INC                   CL A             020813101     1503    62400 SH       OTHER   01                  0    62400        0
ALTRIA GROUP INC               COM              02209S103    19757   225000 SH       OTHER   01                  0   225000        0
AMERICAN EXPRESS CO            COM              025816109     3254    57700 SH       OTHER   01                  0    57700        0
AMERICAN INTL GROUP INC        COM              026874107     2924    43500 SH       OTHER   01                  0    43500        0
AMERIPRISE FINL INC            COM              03076C106     1431    25040 SH       OTHER   01                  0    25040        0
AMERIPRISE FINL INC            COM              03076C106      874    15300 SH       OTHER   01                  0    15300        0
ANHEUSER BUSCH COS INC         COM              035229103     2624    52000 SH       OTHER   01                  0    52000        0
ARCHSTONE SMITH TR             COM              039583109     1932    35600 SH       OTHER   01                  0    35600        0
AUTOMATIC DATA PROCESSING IN   COM              053015103     2420    50000 SH       OTHER   01                  0    50000        0
AVALONBAY CMNTYS INC           COM              053484101     2080    16000 SH       OTHER   01                  0    16000        0
BAKER HUGHES INC               COM              057224107    36431   550900 SH       DEFINED 01             550900        0        0
BANK OF AMERICA CORPORATION    COM              060505104     3750    73500 SH       OTHER   01                  0    73500        0
BAUSCH & LOMB INC              COM              071707103     2926    57200 SH       OTHER   01                  0    57200        0
BEARINGPOINT INC               COM              074002106     2884   376500 SH       OTHER   01                  0   376500        0
BLACK & DECKER CORP            COM              091797100     1183    14500 SH       OTHER   01                  0    14500        0
BOSTON PROPERTIES INC          COM              101121101     2771    23600 SH       OTHER   01                  0    23600        0
BP PLC                         SPONSORED ADR    055622104     2266    35000 SH       OTHER   01                  0    35000        0
BRUNSWICK CORP                 COM              117043109     1908    59900 SH       OTHER   01                  0    59900        0
C D W CORP                     COM              12512N105     1818    29600 SH       OTHER   01                  0    29600        0
CAPITAL ONE FINL CORP          COM              14040H105     2264    30000 SH       OTHER   01                  0    30000        0
CATERPILLAR INC DEL            COM              149123101     2681    40000 SH       OTHER   01                  0    40000        0
CBS CORP NEW                   CL B             124857202      306    10000 SH       OTHER   01                  0    10000        0
CHEVRON CORP NEW               COM              166764100     6988    94480 SH       OTHER   01                  0    94480        0
CITIGROUP INC                  COM              172967101     4253    82840 SH       DEFINED 01              82840        0        0
CITIGROUP INC                  COM              172967101     8076   157300 SH       OTHER   01                  0   157300        0
COCA COLA CO                   COM              191216100     6120   127500 SH       OTHER   01                  0   127500        0
CONOCOPHILLIPS                 COM              20825C104     6357    93000 SH       OTHER   01                  0    93000        0
CONSECO INC                    COM NEW          208464883     3085   178300 SH       OTHER   01                  0   178300        0
CORPORATE OFFICE PPTYS TR      SH BEN INT       22002T108     1969    43100 SH       OTHER   01                  0    43100        0
DISCOVERY HOLDING CO           CL A COM         25468Y107     5154   269400 SH       OTHER   01                  0   269400        0
DONNELLEY R R & SONS CO        COM              257867101     2210    60400 SH       OTHER   01                  0    60400        0
ELECTRONICS FOR IMAGING INC    COM              286082102     1060    45200 SH       OTHER   01                  0    45200        0
EMERSON ELEC CO                COM              291011104     2965    68800 SH       OTHER   01                  0    68800        0
ESSEX PPTY TR INC              COM              297178105     2020    15600 SH       OTHER   01                  0    15600        0
EXPEDIA INC DEL                COM              30212P105     1968    84900 SH       OTHER   01                  0    84900        0
EXXON MOBIL CORP               COM              30231G102    17761   235400 SH       OTHER   01                  0   235400        0
FEDERAL REALTY INVT TR         SH BEN INT NEW   313747206     2293    25300 SH       OTHER   01                  0    25300        0
FOOT LOCKER INC                COM              344849104     1050    44600 SH       OTHER   01                  0    44600        0
FORD MTR CO CAP TR II          PFD TR CV6.5%    345395206      358    10000 SH       DEFINED                 10000        0        0
FORTUNE BRANDS INC             COM              349631101     1781    22600 SH       OTHER   01                  0    22600        0
GAP INC DEL                    COM              364760108     1363    79200 SH       OTHER   01                  0    79200        0
GENERAL ELECTRIC CO            COM              369604103     1697    48000 SH       DEFINED 01              48000        0        0
GENERAL ELECTRIC CO            COM              369604103     7956   225000 SH       OTHER   01                  0   225000        0
GOLDMAN SACHS GROUP INC        COM              38141G104     1033     5000 SH       SOLE                     5000        0        0
GRAINGER W W INC               COM              384802104     1074    13900 SH       OTHER   01                  0    13900        0
HALLIBURTON CO                 COM              406216101     2381    75000 SH       OTHER   01                  0    75000        0
HARLEY DAVIDSON INC            COM              412822108     1639    27900 SH       OTHER   01                  0    27900        0
HARTFORD FINL SVCS GROUP INC   COM              416515104    19766   206800 SH       DEFINED                206800        0        0
HILTON HOTELS CORP             COM              432848109     2337    65000 SH       OTHER   01                  0    65000        0
HOME DEPOT INC                 COM              437076102     2388    65000 SH       OTHER   01                  0    65000        0
HSBC HLDGS PLC                 SPON ADR NEW     404280406     3951    45000 SH       OTHER   01                  0    45000        0
IDEARC INC                     COM              451663108       15      421 SH       DEFINED 01                421        0        0
IDEARC INC                     COM              451663108     1278    36400 SH       OTHER   01                  0    36400        0
INTEL CORP                     COM              458140100     3824   199900 SH       OTHER   01                  0   199900        0
INTERMEC INC                   COM              458786100   282774 12657764 SH       DEFINED 01           12657764        0        0
ISHARES TR                     MSCI EAFE IDX    464287465    58064   761400 SH       DEFINED 01             761400        0        0
JOHNSON & JOHNSON              COM              478160104     5303    88000 SH       OTHER   01                  0    88000        0
JP MORGAN CHASE & CO           COM              46625H100     4828    99800 SH       OTHER   01                  0    99800        0
KINETIC CONCEPTS INC           COM NEW          49460W208     3028    59800 SH       OTHER   01                  0    59800        0
KRAFT FOODS INC                CL A             50075N104      981    31000 SH       DEFINED 01              31000        0        0
LABORATORY CORP AMER HLDGS     COM NEW          50540R409     1445    19900 SH       OTHER   01                  0    19900        0
LAUDER ESTEE COS INC           CL A             518439104      845    17300 SH       OTHER   01                  0    17300        0
LENNAR CORP                    CL A             526057104      886    21000 SH       OTHER   01                  0    21000        0
LIBERTY GLOBAL INC             COM SER C        530555309     2331    76070 SH       OTHER   01                  0    76070        0
LIMITED BRANDS INC             COM              532716107     1764    67700 SH       OTHER   01                  0    67700        0
LIZ CLAIBORNE INC              COM              539320101     2228    52000 SH       OTHER   01                  0    52000        0
LOWES COS INC                  COM              548661107      252     8000 SH       OTHER   01                  0     8000        0
MACK CALI RLTY CORP            COM              554489104     1834    38500 SH       OTHER   01                  0    38500        0
MASCO CORP                     COM              574599106     1841    67200 SH       OTHER   01                  0    67200        0
MBIA INC                       COM              55262C100     1801    27500 SH       OTHER   01                  0    27500        0
MCDONALDS CORP                 COM              580135101     3154    70000 SH       OTHER   01                  0    70000        0
MCGRAW HILL COS INC            COM              580645109     5659    90000 SH       OTHER   01                  0    90000        0
MDS INC                        COM              55269P302     1974   104400 SH       OTHER   01                  0   104400        0
MEDIMMUNE INC                  COM              584699102     2929    80500 SH       OTHER   01                  0    80500        0
MERRILL LYNCH & CO INC         COM              590188108     3675    45000 SH       OTHER   01                  0    45000        0
MGIC INVT CORP WIS             COM              552848103      848    14400 SH       OTHER   01                  0    14400        0
MICROCHIP TECHNOLOGY INC       COM              595017104      675    19000 SH       OTHER   01                  0    19000        0
MICROSOFT CORP                 COM              594918104     3670   131700 SH       OTHER   01                  0   131700        0
MOLSON COORS BREWING CO        CL B             60871R209     1041    11000 SH       OTHER   01                  0    11000        0
MUELLER WTR PRODS INC          COM SER B        624758207      821    61305 SH       OTHER   01                  0    61305        0
NATIONAL SEMICONDUCTOR CORP    COM              637640103     3203   132700 SH       OTHER   01                  0   132700        0
NEWS CORP                      CL A             65248E104     2945   127400 SH       OTHER   01                  0   127400        0
NORTHROP GRUMMAN CORP          COM              666807102   445358  6000511 SH       DEFINED 01            6000511        0        0
NORTHROP GRUMMAN CORP          COM              666807102    56302   758589 SH       SOLE                   758589        0        0
OCCIDENTAL PETE CORP DEL       COM              674599105     2416    49000 SH       OTHER   01                  0    49000        0
OMNICARE INC                   COM              681904108     3038    76400 SH       OTHER   01                  0    76400        0
PARTNERRE LTD                  COM              G6852T105     1350    19700 SH       OTHER   01                  0    19700        0
PEMCO AVIATION INC             COM              706444106       31     3600 SH       DEFINED 01               3600        0        0
PENTAIR INC                    COM              709631105     1022    32800 SH       OTHER   01                  0    32800        0
PEPSICO INC                    COM              713448108     5409    85100 SH       OTHER   01                  0    85100        0
POST PPTYS INC                 COM              737464107     1806    39500 SH       OTHER   01                  0    39500        0
PRAXAIR INC                    COM              74005P104     2141    34000 SH       OTHER   01                  0    34000        0
PROCTER & GAMBLE CO            COM              742718109     6903   109300 SH       OTHER   01                  0   109300        0
PROLOGIS                       SH BEN INT       743410102     2234    34400 SH       OTHER   01                  0    34400        0
PUBLIC STORAGE INC             COM              74460D109     2149    22700 SH       OTHER   01                  0    22700        0
QUALCOMM INC                   COM              747525103     1280    30000 SH       OTHER   01                  0    30000        0
ROYAL DUTCH SHELL PLC          SPONS ADR A      780259206     2519    38000 SH       OTHER   01                  0    38000        0
SAFECO CORP                    COM              786429100     1833    27600 SH       OTHER   01                  0    27600        0
SIMON PPTY GROUP INC NEW       COM              828806109     2370    21300 SH       OTHER   01                  0    21300        0
SNAP ON INC                    COM              833034101     3160    65700 SH       OTHER   01                  0    65700        0
SOVEREIGN BANCORP INC          COM              845905108     2861   112450 SH       OTHER   01                  0   112450        0
SPRINT NEXTEL CORP             COM FON          852061100      702    37000 SH       OTHER   01                  0    37000        0
SUN MICROSYSTEMS INC           COM              866810104     3080   512400 SH       OTHER   01                  0   512400        0
SUNTRUST BKS INC               COM              867914103     3031    36500 SH       OTHER   01                  0    36500        0
SYSCO CORP                     COM              871829107     1861    55000 SH       OTHER   01                  0    55000        0
TARGET CORP                    COM              87612E106     3259    55000 SH       OTHER   01                  0    55000        0
TAUBMAN CTRS INC               COM              876664103     2465    42500 SH       OTHER   01                  0    42500        0
TENET HEALTHCARE CORP          COM              88033G100     3095   481400 SH       OTHER   01                  0   481400        0
TEXAS INSTRS INC               COM              882508104      497    16500 SH       OTHER   01                  0    16500        0
THOR INDS INC                  COM              885160101     1418    36000 SH       OTHER   01                  0    36000        0
TIFFANY & CO NEW               COM              886547108     1878    41300 SH       OTHER   01                  0    41300        0
TOTAL S A                      SPONSORED ADR    89151E109     3349    48000 SH       OTHER   01                  0    48000        0
TRIBUNE CO NEW                 COM              896047107     2601    81000 SH       OTHER   01                  0    81000        0
UNITED PARCEL SERVICE INC      CL B             911312106     2664    38000 SH       OTHER   01                  0    38000        0
UNITED TECHNOLOGIES CORP       COM              913017109     2600    40000 SH       OTHER   01                  0    40000        0
UNITEDHEALTH GROUP INC         COM              91324P102     1669    31500 SH       OTHER   01                  0    31500        0
UNIVERSAL AMERN FINL CORP      COM              913377107      969    50000 SH       DEFINED                 50000        0        0
VANGUARD INTL EQUITY INDEX F   EMR MKT ETF      922042858    12162   154200 SH       DEFINED 01             154200        0        0
VERIZON COMMUNICATIONS         COM              92343V104      320     8428 SH       DEFINED 01               8428        0        0
VIACOM INC NEW                 CL B             92553P201      411    10000 SH       OTHER   01                  0    10000        0
WAL MART STORES INC            COM              931142103     3662    78000 SH       OTHER   01                  0    78000        0
WALGREEN CO                    COM              931422109     5048   110000 SH       OTHER   01                  0   110000        0
WALTER INDS INC                COM              93317Q105      918    37100 SH       OTHER   01                  0    37100        0
WASHINGTON MUT INC             COM              939322103     3521    87200 SH       OTHER   01                  0    87200        0
WHOLE FOODS MKT INC            COM              966837106     1346    30000 SH       OTHER   01                  0    30000        0
XEROX CORP                     COM              984121103     3120   184700 SH       OTHER   01                  0   184700        0
ZALE CORP NEW                  COM              988858106     2870   108800 SH       OTHER   01                  0   108800        0