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, 2006

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 08, 2006

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:         2

Form13F Information Table Entry Total:     142

Form13F Information Table Value Total:     $1,223,018 (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    28-00121                      TRINITY UNIVERSAL INSURANCE COMPANY
2    28-00117                      UNITED INSURANCE COMPANY OF AMERICA



                                    
                                                     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     2548    60000 SH       OTHER   1                   0    60000        0
ABBOTT LABS                    COM              002824100      425    10000 SH       OTHER                       0    10000        0
ALTRIA GROUP INC               COM              02209S103    13463   190000 SH       OTHER   1                   0   190000        0
ALTRIA GROUP INC               COM              02209S103     2480    35000 SH       OTHER                       0    35000        0
AMERICAN EXPRESS CO            COM              025816109     2638    50200 SH       OTHER   1                   0    50200        0
AMERICAN EXPRESS CO            COM              025816109      394     7500 SH       OTHER                       0     7500        0
AMERICAN INTL GROUP INC        COM              026874107      562     8500 SH       OTHER                       0     8500        0
AMERICAN INTL GROUP INC        COM              026874107     2313    35000 SH       OTHER   1                   0    35000        0
AMERIPRISE FINL INC            COM              03076C106      903    20040 SH       OTHER   1                   0    20040        0
AMERIPRISE FINL INC            COM              03076C106      225     5000 SH       OTHER                       0     5000        0
AMERIPRISE FINL INC            COM              03076C106     1244    27600 SH       OTHER   1                   0    27600        0
ANHEUSER BUSCH COS INC         COM              035229103     1925    45000 SH       OTHER   1                   0    45000        0
ANHEUSER BUSCH COS INC         COM              035229103      299     7000 SH       OTHER                       0     7000        0
ARAMARK CORP                   CL B             038521100     1625    55000 SH       OTHER   1                   0    55000        0
AUTOMATIC DATA PROCESSING IN   COM              053015103     1507    33000 SH       OTHER   1                   0    33000        0
AUTOMATIC DATA PROCESSING IN   COM              053015103      320     7000 SH       OTHER                       0     7000        0
AUTONATION INC                 COM              05329W102     1138    52800 SH       OTHER   1                   0    52800        0
BAKER HUGHES INC               COM              057224107    45479   664900 SH       DEFINED 1              664900        0        0
BANK OF AMERICA CORPORATION    COM              060505104     2732    60000 SH       OTHER   1                   0    60000        0
BANK OF AMERICA CORPORATION    COM              060505104      569    12500 SH       OTHER                       0    12500        0
BEARINGPOINT INC               COM              074002106     2897   341200 SH       OTHER   1                   0   341200        0
BELO CORP                      COM SER A        080555105     1356    68200 SH       OTHER   1                   0    68200        0
BLACK & DECKER CORP            COM              091797100     1894    21800 SH       OTHER   1                   0    21800        0
BP PLC                         SPONSORED ADR    055622104     4826    70000 SH       OTHER   1                   0    70000        0
BP PLC                         SPONSORED ADR    055622104      931    13500 SH       OTHER                       0    13500        0
BRUNSWICK CORP                 COM              117043109     3132    80600 SH       OTHER   1                   0    80600        0
C D W CORP                     COM              12512N105     1907    32400 SH       OTHER   1                   0    32400        0
CABLEVISION SYS CORP           CL A NY CABLVS   12686C109     1677    62800 SH       OTHER   1                   0    62800        0
CBS CORP NEW                   CL B             124857202      240    10000 SH       OTHER   1                   0    10000        0
CHEVRON CORP NEW               COM              166764100     4603    79400 SH       OTHER   1                   0    79400        0
CHEVRON CORP NEW               COM              166764100      874    15080 SH       OTHER                       0    15080        0
CITIGROUP INC                  COM              172967101      545    11531 SH       DEFINED                 11531        0        0
CITIGROUP INC                  COM              172967101     1266    26800 SH       OTHER                       0    26800        0
CITIGROUP INC                  COM              172967101     3368    71309 SH       DEFINED 1               71309        0        0
CITIGROUP INC                  COM              172967101     6164   130500 SH       OTHER   1                   0   130500        0
COCA COLA CO                   COM              191216100     4501   107500 SH       OTHER   1                   0   107500        0
COCA COLA CO                   COM              191216100      837    20000 SH       OTHER                       0    20000        0
COLGATE PALMOLIVE CO           COM              194162103     1627    28500 SH       OTHER   1                   0    28500        0
COLGATE PALMOLIVE CO           COM              194162103      400     7000 SH       OTHER                       0     7000        0
CONOCOPHILLIPS                 COM              20825C104     4610    73000 SH       OTHER   1                   0    73000        0
CONOCOPHILLIPS                 COM              20825C104      947    15000 SH       OTHER                       0    15000        0
CONSECO INC                    COM NEW          208464883     3013   121400 SH       OTHER   1                   0   121400        0
DISCOVERY HOLDING CO           CL A COM         25468Y107     4148   276500 SH       OTHER   1                   0   276500        0
DONNELLEY R R & SONS CO        COM              257867101     1976    60400 SH       OTHER   1                   0    60400        0
ECHOSTAR COMMUNICATIONS NEW    CL A             278762109     1771    59300 SH       OTHER   1                   0    59300        0
EMERSON ELEC CO                COM              291011104      477     5700 SH       OTHER                       0     5700        0
EMERSON ELEC CO                COM              291011104     2400    28700 SH       OTHER   1                   0    28700        0
EQUIFAX INC                    COM              294429105     1408    37800 SH       OTHER   1                   0    37800        0
EXXON MOBIL CORP               COM              30231G102    12172   200000 SH       OTHER   1                   0   200000        0
EXXON MOBIL CORP               COM              30231G102     2154    35400 SH       OTHER                       0    35400        0
FEDERAL HOME LN MTG CORP       COM              313400301      214     3500 SH       OTHER                       0     3500        0
FEDERAL HOME LN MTG CORP       COM              313400301     1281    21000 SH       OTHER   1                   0    21000        0
FORD MTR CO CAP TR II          PFD TR CV6.5%    345395206      301    10000 SH       DEFINED 2               10000        0        0
FORTUNE BRANDS INC             COM              349631101     1959    24300 SH       OTHER   1                   0    24300        0
GAP INC DEL                    COM              364760108     1978   105900 SH       OTHER   1                   0   105900        0
GENERAL ELECTRIC CO            COM              369604103     6087   175000 SH       OTHER   1                   0   175000        0
GENERAL ELECTRIC CO            COM              369604103     1669    48000 SH       DEFINED                 48000        0        0
GENERAL ELECTRIC CO            COM              369604103     1391    40000 SH       OTHER                       0    40000        0
GOLDMAN SACHS GROUP INC        COM              38141G104      785     5000 SH       SOLE                     5000        0        0
HARLEY DAVIDSON INC            COM              412822108     1878    36200 SH       OTHER   1                   0    36200        0
HARTFORD FINL SVCS GROUP INC   COM              416515104    18067   224300 SH       DEFINED 2              224300        0        0
HOME DEPOT INC                 COM              437076102     1692    40000 SH       OTHER   1                   0    40000        0
HOME DEPOT INC                 COM              437076102      381     9000 SH       OTHER                       0     9000        0
HSBC HLDGS PLC                 SPON ADR NEW     404280406      545     6500 SH       OTHER                       0     6500        0
HSBC HLDGS PLC                 SPON ADR NEW     404280406     3184    38000 SH       OTHER   1                   0    38000        0
INTEL CORP                     COM              458140100     3201   164500 SH       OTHER   1                   0   164500        0
INTEL CORP                     COM              458140100      689    35400 SH       OTHER                       0    35400        0
INTERMEC INC                   COM              458786100   386188 12657764 SH       DEFINED 1            12657764        0        0
JOHNSON & JOHNSON              COM              478160104     4442    75000 SH       OTHER   1                   0    75000        0
JOHNSON & JOHNSON              COM              478160104      770    13000 SH       OTHER                       0    13000        0
JP MORGAN CHASE & CO           COM              46625H100      666    16000 SH       OTHER                       0    16000        0
JP MORGAN CHASE & CO           COM              46625H100     3489    83800 SH       OTHER   1                   0    83800        0
KINETIC CONCEPTS INC           COM NEW          49460W208     1544    37500 SH       OTHER   1                   0    37500        0
KRAFT FOODS INC                CL A             50075N104      940    31000 SH       DEFINED 1               31000        0        0
LABORATORY CORP AMER HLDGS     COM NEW          50540R409     2515    43000 SH       OTHER   1                   0    43000        0
LAUDER ESTEE COS INC           CL A             518439104     2782    74800 SH       OTHER   1                   0    74800        0
LAUDER ESTEE COS INC           CL A             518439104      457    12300 SH       OTHER   1                   0    12300        0
LAUDER ESTEE COS INC           CL A             518439104      186     5000 SH       OTHER                       0     5000        0
LENNAR CORP                    CL A             526057104     1268    21000 SH       OTHER   1                   0    21000        0
LIBERTY GLOBAL INC             COM SER C        530555309     1992   100836 SH       OTHER   1                   0   100836        0
LIMITED BRANDS INC             COM              532716107     1656    67700 SH       OTHER   1                   0    67700        0
LIZ CLAIBORNE INC              COM              539320101     2676    65300 SH       OTHER   1                   0    65300        0
MASCO CORP                     COM              574599106     2183    67200 SH       OTHER   1                   0    67200        0
MBIA INC                       COM              55262C100     1924    32000 SH       OTHER   1                   0    32000        0
MCDONALDS CORP                 COM              580135101     1890    55000 SH       OTHER   1                   0    55000        0
MCDONALDS CORP                 COM              580135101      515    15000 SH       OTHER                       0    15000        0
MCGRAW HILL COS INC            COM              580645109     4033    70000 SH       OTHER   1                   0    70000        0
MCGRAW HILL COS INC            COM              580645109     1152    20000 SH       OTHER                       0    20000        0
MEDIMMUNE INC                  COM              584699102     2414    66000 SH       OTHER   1                   0    66000        0
MERRILL LYNCH & CO INC         COM              590188108     2363    30000 SH       OTHER   1                   0    30000        0
MERRILL LYNCH & CO INC         COM              590188108      551     7000 SH       OTHER                       0     7000        0
MGIC INVT CORP WIS             COM              552848103     2359    35400 SH       OTHER   1                   0    35400        0
MICROSOFT CORP                 COM              594918104     3023   111100 SH       OTHER   1                   0   111100        0
MICROSOFT CORP                 COM              594918104      561    20600 SH       OTHER                       0    20600        0
MOLSON COORS BREWING CO        CL B             60871R209     1022    14900 SH       OTHER   1                   0    14900        0
NATIONAL SEMICONDUCTOR CORP    COM              637640103     1698    61000 SH       OTHER   1                   0    61000        0
NEWS CORP                      CL A             65248E104     1771   106600 SH       OTHER   1                   0   106600        0
NEWS CORP                      CL A             65248E104      345    20800 SH       OTHER                       0    20800        0
NORTHROP GRUMMAN CORP          COM              666807102   414364  6067711 SH       DEFINED 1             6067711        0        0
NORTHROP GRUMMAN CORP          COM              666807102    94847  1388889 SH       SOLE                  1388889        0        0
OCCIDENTAL PETE CORP DEL       COM              674599105     1853    20000 SH       OTHER   1                   0    20000        0
OCCIDENTAL PETE CORP DEL       COM              674599105      371     4000 SH       OTHER                       0     4000        0
OMNICARE INC                   COM              681904108     1452    26400 SH       OTHER   1                   0    26400        0
PEPSI BOTTLING GROUP INC       COM              713409100     1422    46800 SH       OTHER   1                   0    46800        0
PEPSICO INC                    COM              713448108     4045    70000 SH       OTHER   1                   0    70000        0
PEPSICO INC                    COM              713448108      873    15100 SH       OTHER                       0    15100        0
PRAXAIR INC                    COM              74005P104     1379    25000 SH       OTHER   1                   0    25000        0
PRAXAIR INC                    COM              74005P104      303     5500 SH       OTHER                       0     5500        0
PROCTER & GAMBLE CO            COM              742718109     5290    91800 SH       OTHER   1                   0    91800        0
PROCTER & GAMBLE CO            COM              742718109     1009    17500 SH       OTHER                       0    17500        0
ROYAL DUTCH SHELL PLC          SPONS ADR A      780259206     2117    34000 SH       OTHER   1                   0    34000        0
ROYAL DUTCH SHELL PLC          SPONS ADR A      780259206      249     4000 SH       OTHER                       0     4000        0
SNAP ON INC                    COM              833034101     3896   102200 SH       OTHER   1                   0   102200        0
SOVEREIGN BANCORP INC          COM              845905108     3002   137000 SH       OTHER   1                   0   137000        0
SUN MICROSYSTEMS INC           COM              866810104     2867   558800 SH       OTHER   1                   0   558800        0
SUNTRUST BKS INC               COM              867914103     2183    30000 SH       OTHER   1                   0    30000        0
SUNTRUST BKS INC               COM              867914103      473     6500 SH       OTHER                       0     6500        0
SYSCO CORP                     COM              871829107      962    30000 SH       OTHER   1                   0    30000        0
SYSCO CORP                     COM              871829107      208     6500 SH       OTHER                       0     6500        0
TARGET CORP                    COM              87612E106     2340    45000 SH       OTHER   1                   0    45000        0
TARGET CORP                    COM              87612E106      520    10000 SH       OTHER                       0    10000        0
TIFFANY & CO NEW               COM              886547108     1697    45200 SH       OTHER   1                   0    45200        0
TOTAL S A                      SPONSORED ADR    89151E109     2635    20000 SH       OTHER   1                   0    20000        0
TOTAL S A                      SPONSORED ADR    89151E109      527     4000 SH       OTHER                       0     4000        0
TRIBUNE CO NEW                 COM              896047107     2222    81000 SH       OTHER   1                   0    81000        0
UNITED PARCEL SERVICE INC      CL B             911312106     2143    27000 SH       OTHER   1                   0    27000        0
UNITED PARCEL SERVICE INC      CL B             911312106      476     6000 SH       OTHER                       0     6000        0
UNITEDHEALTH GROUP INC         COM              91324P102     1229    22000 SH       OTHER   1                   0    22000        0
UNITEDHEALTH GROUP INC         COM              91324P102      251     4500 SH       OTHER                       0     4500        0
UNIVERSAL AMERN FINL CORP      COM              913377107      770    50000 SH       DEFINED                 50000        0        0
VERIZON COMMUNICATIONS         COM              92343V104      287     8428 SH       DEFINED 1                8428        0        0
VIACOM INC NEW                 CL B             92553P201      388    10000 SH       OTHER   1                   0    10000        0
WAL MART STORES INC            COM              931142103     3118    66000 SH       OTHER   1                   0    66000        0
WAL MART STORES INC            COM              931142103      567    12000 SH       OTHER                       0    12000        0
WALGREEN CO                    COM              931422109     3882    90000 SH       OTHER   1                   0    90000        0
WALGREEN CO                    COM              931422109      863    20000 SH       OTHER                       0    20000        0
WASHINGTON MUT INC             COM              939322103     3716    87200 SH       OTHER   1                   0    87200        0
WATSON PHARMACEUTICALS INC     COM              942683103     1058    36800 SH       OTHER   1                   0    36800        0
WHOLE FOODS MKT INC            COM              966837106     1196    18000 SH       OTHER   1                   0    18000        0
WHOLE FOODS MKT INC            COM              966837106      266     4000 SH       OTHER                       0     4000        0
WILMINGTON TRUST CORP          COM              971807102      984    22700 SH       OTHER   1                   0    22700        0
XEROX CORP                     COM              984121103     3131   206000 SH       OTHER   1                   0   206000        0