Form 13F Report for the Calendar Year or Quarter Ended: 3/31/2010

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:    Horizon Bancorp
Address: 515 Franklin Square
         Michigan City, IN 46360

Form 13F File Number 28-6479

Person Signing this Report on Behalf of Reporting Manager:

Name:  Mark E. Secor
Title: Chief Financial Officer
Phone: 219-873-2611

Signature, Place, and Date of Signing:


/s/ Mark E. Secor, Chief Financial Officer   Michigan City, IN
------------------------------------------         Place

5/6/2010
Date

Report Type (check only one):

     [X]  13F Holdings Report

     [ ]  13F Notice

     [ ]  13F Combination Report

List of Other Managers Reporting for this Manager: Horizon Trust & Investment
                                                   Management



Report Summary:

Number of Other Included Managers:                     1
Form 13F Information Table Entry Total:              182
Form 13F Information Table Value Total:   $43,720,406.00

List of Other Included Managers: Horizon Trust & Investment Management





                                                                   INVESTMENT DIRECTION (6)
                                                                   ------------------------
                                                                                             OTHER    VOTING AUTHORITY (8)
                                                          SHARES/            SHARED- SHARED MANAGERS ---------------------
 NAME OF ISSUER (1)    TYPE (2) CUSIP (3)   MARKET (4)     PV (5)     SOLE   DEFINED -OTHER    (7)   SOLE SHARED    NONE
 ------------------    -------- --------- -------------- --------- --------- ------- ------ -------- ---- ------ ---------
                                                                                
Aflac Inc              Equity   001055102         606745     11176     10891     285               0    0      0     11176
AT&T Inc Com           Equity   00206R102         410623     15891     15096     795               0    0      0     15891
Abbott Labs            Equity   002824100         169893      3225       825    2400               0    0      0      3225
ADR Alcatel - Lucent   Equity   013904305            730       234       195      39               0    0      0       234
Allied Capital Corp    Equity   01903Q108           1988       400       400       0               0    0      0       400
Altria Group
   Incorporated        Equity   02209S103         118934      5796      5346     450               0    0      0      5796
American Electric &
   Power Co            Equity   025537101           7827       229       229       0               0    0      0       229
American Express Co    Equity   025816109         191364      4638      4638       0               0    0      0      4638
American
   International
   Group               Equity   026874784           1161        34         0      34               0    0      0        34
Ameriprise Financial
   Inc                 Equity   03076C106          39055       861       861       0               0    0      0       861
Ametek Inc             Equity   031100100         173220      4178      4178       0               0    0    300      3878
Amgen Inc              Equity   031162100          11968       200         0     200               0    0      0       200
Apache Corp Co         Equity   037411105          10150       100         0     100               0    0      0       100
Apple, Inc             Equity   037833100          35250       150         0     150               0    0      0       150
Avanir
   Pharmaceuticals,
   Class A             Equity   05348P401           1044       450       450       0               0    0      0       450
ADR AXA Sponsored      Equity   054536107            554        25        25       0               0    0      0        25
ADR BP Amoco PLC       Equity   055622104        1047577     18356     12914    5442               0    0      0     18356
Bank of America Corp   Equity   060505104          31755      1779        76    1703               0    0      0      1779
Berkshire Hathaway
   Inc Cl A            Equity   084670108         243600         2         2       0               0    0      0         2
Berkshire Hathaway
   Class B             Equity   084670702         491684      6050      6050       0               0    0      0      6050
BlackRock Insured
   Municipal Term Tr   Equity   092474105          15075      1500      1500       0               0    0      0      1500
BlackRock Invt
   Quality Muni Fd -
   Closed End          Equity   09247D105           6006       429       429       0               0    0      0       429
BlackRock MuniVest II  Equity   09253T101          88586      6139      6139       0               0    0      0      6139
Blackrock Muniyield
   Insured             Equity   09254E103           9752       745       745       0               0    0      0       745
Blackrock Muniyield
   Quality             Equity   09254F100          11210       810       810       0               0    0      0       810
Boeing Co              Equity   097023105          25704       354       154     200               0    0      0       354
Buffalo Wild Wings
   Inc                 Equity   119848109           4811       100         0     100               0    0      0       100
CME Group Inc          Equity   12572Q105           8851        28        28       0               0    0      0        28
CP Holdrs Dep Rcpts
   Cp                  Equity   12616K106          11014       100       100       0               0    0      0       100
CSX Corp               Equity   126408103         117783      2314      2314       0               0    0      0      2314
CVS/Caremark Corp      Equity   126650100          12577       344       344       0               0    0      0       344
Campbell Soup Company  Equity   134429109           3535       100       100       0               0    0      0       100
Caterpillar Inc        Equity   149123101         303188      4824      4688     136               0    0      0      4824
Celgene Corp           Equity   151020104          12392       200         0     200               0    0      0       200
Chemical Financial     Equity   163731102           9448       400       400       0               0    0      0       400
Chesapeake Energy
   Corp                Equity   165167107            473        20        20       0               0    0      0        20
Chevron Corp           Equity   166764100         887818     11708     11248     460               0    0      0     11708
Cisco Systems
   Incorporated        Equity   17275R102         302547     11623     11030     593               0    0      0     11623
Citigroup Inc          Equity   172967101           2734       675        75     600               0    0      0       675
Clorox Company         Equity   189054109          28478       444       444       0               0    0      0       444
Coca Cola Company      Equity   191216100         170445      3099      1300    1799               0    0      0      3099





                                                                                
Colgate Palmolive      Equity   194162103           6821        80        80       0               0    0      0        80
Comcast Corporation
   New Class A         Equity   20030N101          11223       596       596       0               0    0      0       596
Conagra Foods          Equity   205887102         288857     11522     11422     100               0    0      0     11522
ConocoPhillips         Equity   20825C104          94050      1838      1838       0               0    0      0      1838
Crane Co Com           Equity   224399105          11325       319         0     319               0  319      0       319
DNP Select Income      Equity   23325P104          20579      2220      1330     890               0    0      0      2220
Deere & Co Inc         Equity   244199105          11892       200         0     200               0    0      0       200
Dell Inc               Equity   24702R101          19526      1300         0    1300               0    0      0      1300
Devon Energy Corp      Equity   25179M103           6443       100         0     100               0    0      0       100
Disney Walt Co         Equity   254687106          13964       400         0     400               0    0      0       400
Discover Financial
   Services            Equity   254709108           1430        96        96       0               0    0      0        96
DirecTV Group Inc      Equity   25490A101         371707     10994     10724     270               0    0      0     10994
Du Pont E I De
   Nemours & Co        Equity   263534109         278741      7485      6750     735               0    0      0      7485
Exelon Corp            Equity   30161N101           8762       200         0     200               0    0      0       200
Express 1 Expedited
   Solutions           Equity   30217Q108         155176    106285    106285       0               0    0      0    106285
Exxon Mobil
   Corporation         Equity   30231G102         762165     11379      9276    2103               0    0      0     11379
Fifth Third Bancorp    Equity   316773100           5627       415       415       0               0    0      0       415
First Finl Bancorp OH  Equity   320209109          60914      3426      3426       0               0    0      0      3426
1st Source Corp        Equity   336901103          54230      3090      3090       0               0    0      0      3090
FIRSTBANK CORP MICH    Equity   33761G104          11800      2000      2000       0               0    0      0      2000
Fluor Corp             Equity   343412102         194365      4179      4147      32               0    0      0      4179
Ford Motor Co          Equity   345370860          18855      1500       500    1000               0    0      0      1500
Freeport-McMoran
   Copper & Gold Inc   Equity   35671D857          16708       200         0     200               0    0      0       200
Gallagher Arthur J &
   Co                  Equity   363576109           7365       300         0     300               0    0      0       300
General Electric Co    Equity   369604103         475948     26151     22997    3154               0    0      0     26151
General Mills Inc      Equity   370334104         155738      2200      2200       0               0    0      0      2200
Gilead Sciences Inc    Equity   375558103           4547       100         0     100               0    0      0       100
Google Inc Cl A        Equity   38259P508          45370        80         0      80               0    0      0        80
Harley Davidson Inc    Equity   412822108          14035       500         0     500               0    0      0       500
Hartford Financial
   Services Group      Equity   416515104           5599       197       197       0               0    0      0       197
Hershey Foods Corp     Equity   427866108          42810      1000      1000       0               0    0      0      1000
Hewlett-Packard Co     Equity   428236103           3348        63        63       0               0    0      0        63
Honeywell Inc          Equity   438516106          27162       600       600       0               0    0      0       600
Horizon Bancorp Ind    Equity   440407104       12400535    642515    624559   17956               0    0      0    642515
ITT Industries
   Incorporated        Equity   450911102          42781       798       798       0               0    0      0       798
Illinois Tool Works
   Incorporated        Equity   452308109          16671       352       352       0               0    0      0       352
Intel Corp             Equity   458140100          90698      4069        69    4000               0    0      0      4069
Intercontinental
   exchange Inc        Equity   45865V100           2805        25        25       0               0    0      0        25
International
   Business Machines   Equity   459200101         660744      5152      5026     126               0    0      0      5152
Investment Grade
   Municipal           Equity   461368102          50505      3500      3500       0               0    0      0      3500
iShares S&P 1500
   Index               Equity   464287150          12997       246       246       0               0    0      0       246
iShares Lehman
   Aggregate Bond
   Fund                Equity   464287226         179120      1719      1719       0               0    0      0      1719
iShares S&P Global
   Telecommunications  Equity   464287275          13808       260       260       0               0    0      0       260





                                                                                
iShares S&P 500
   Value Index         Equity   464287408           6211       110       110       0               0    0      0       110
iShares Barclays 1-3
   Year Treasury Bond  Equity   464287457          44686       536       536       0               0    0      0       536
iShares MSCI EAFE
   Index               Equity   464287465          38122       681       681       0               0    0      0       681
iShares S&P North
   Amer Technology     Equity   464287549        1391967     25085     24777     308               0    0      0     25085
iShares Russell 1000
   Value Index         Equity   464287598          35909       588       588       0               0    0      0       588
iShares Russell 1000
   Growth Index        Equity   464287614          36209       697       697       0               0    0      0       697
iShares Dow Jones US
   Technology          Equity   464287721          15473       265       265       0               0    0      0       265
iShares S&P SmallCap
   600 Index           Equity   464287804          19500       328       328       0               0    0      0       328
iShares Dow Jones US
   Consumer Goods      Equity   464287812          14453       245       245       0               0    0      0       245
iShares S&P SmallCap
   600 Growth          Equity   464287887           9189       150       150       0               0    0      0       150
JP Morgan Chase and
   Company             Equity   46625H100          26045       582       180     402               0    0      0       582
Johnson & Johnson      Equity   478160104         732326     11232     10877     355               0    0      0     11232
Johnson Controls
   Incorporated        Equity   478366107         325941      9880      9810      70               0    0      0      9880
Kansas City Southern
   Industries Inc New  Equity   485170302           7596       210       210       0               0    0      0       210
Kimco Rlty Corp        Equity   49446R109           9384       600       600       0               0    0      0       600
Kraft Foods
   Incorporated
   Class A             Equity   50075N104           3024       100       100       0               0    0      0       100
L-3 Communication
   Holdings
   Corporation         Equity   502424104         633163      6910      6464     446               0    0      0      6910
Laboratory Corp Of
   America Holdings    Equity   50540R409         522778      6905      6749     156               0    0      0      6905
Lakeland Finl Corp     Equity   511656100           9525       500       500       0               0    0      0       500
LaPorte Bancorp Inc    Equity   516650108          20040      3414      3414       0               0    0      0      3414
Lennar Corp            Equity   526057104           8605       500         0     500               0    0      0       500
Lincoln National
   Corporation         Equity   534187109          30700      1000      1000       0               0    0      0      1000
Lowes Company          Equity   548661107           4848       200         0     200               0    0      0       200
Macatawa Bank Corp     Equity   554225102           2683      1533         0    1533               0    0      0      1533
Marathon Oil
   Corporation         Equity   565849106         358481     11330     11250      80               0    0      0     11330
McDermott Intl Inc     Equity   580037109           2692       100         0     100               0    0      0       100
McDonalds Corporation  Equity   580135101          50040       750       750       0               0    0      0       750
McGraw Hill
   Companies
   Incorporated        Equity   580645109          22602       634       634       0               0    0      0       634
Medtronic
   Incorporated        Equity   585055106           4503       100       100       0               0    0      0       100
Merck & Co. Inc.       Equity   58933Y105          40786      1092       692     400               0    0      0      1092
Microsoft Corporation  Equity   594918104         472056     16118     14588    1530               0    0      0     16118
Morgan Stanley         Equity   617446448           5624       192       192       0               0    0      0       192
National Oil Well
   Varco               Equity   637071101         295706      7287      7233      54               0    0      0      7287
Newmont Mining Corp    Equity   651639106          10186       200         0     200               0    0      0       200
Nisource Incorporated  Equity   65473P105          12103       766       766       0               0    0      0       766
Norfolk Southern
   Corporation         Equity   655844108           5589       100       100       0               0    0      0       100
Northern Trust
   Corporation         Equity   665859104           2763        50        50       0               0    0      0        50
Nuveen Municipal
   Advantage Fund Inc  Equity   67062H106          28900      2000      2000       0               0    0      0      2000
Nuveen Insured
   Quality Municipal
   Fund                Equity   67062N103          20435      1425         0    1425               0    0      0      1425
Nuveen Insd Dividend
   Advantage           Equity   67071L106          29588      2072         0    2072               0    0      0      2072
Nuveen Quality PFD
   Income Fund         Equity   67071S101           7260      1000      1000       0               0    0      0      1000
Nuveen
   Multi-Strategy
   Income & Growth
   Fund                Equity   67073B106           4234       538         0     538               0    0      0       538
Old Second Bancorp
   Inc Ill             Equity   680277100           3295       500       500       0               0    0      0       500





                                                                                
Omnicom Group          Equity   681919106         315758      8136      8076      60               0    0      0      8136
Oracle Corporation     Equity   68389X105         133692      5200         0    5200               0    0      0      5200
Pactiv Corporation     Equity   695257105          12590       500       500       0               0    0      0       500
Patterson Cos Inc      Equity   703395103           1770        57         0      57               0    0      0        57
Paychex Incorporated   Equity   704326107         309320     10069      9794     275               0    0      0     10069
Pepsico Incorporated   Equity   713448108         601659      9094      8697     397               0    0      0      9094
Pfizer Incorporated    Equity   717081103        3540326    206433    121911   84522               0    0      0    206433
Philip Morris Intl
   Inc                 Equity   718172109         285889      5481      5031     450               0    0      0      5481
Plum Creek Timber      Equity   729251108          43813      1126      1126       0               0    0      0      1126
Potash Corp Sask Inc   Equity   73755L107          23870       200         0     200               0    0      0       200
PowerShares
   WilderHill Clean
   Energy              Equity   73935X500         180824     18155     18020     135               0    0      0     18155
Procter & Gamble       Equity   742718109          75924      1200      1200       0               0    0      0      1200
UltraShort Euro
   ProShares           Equity   74347W882           9776       470       470       0               0    0      0       470
Qwest Communications   Equity   749121109           1999       383       155     228               0    0      0       383
Research In Motion     Equity   760975102         267697      3619      3592      27               0    0      0      3619
ADR Rio Tinto PLC      Equity   767204100          23673       100         0     100               0    0      0       100
Rockwell Auto Corp     Equity   773903109          22882       406       406       0               0    0      0       406
ADR Royal Dutch
   Shell PLC           Equity   780259206         170687      2950      2950       0               0    0      0      2950
S&P Depository
   Receipts Tr Unit
   Ser 1               Equity   78462F103          92430       790       790       0               0    0      0       790
SPDR Gold Shares       Equity   78463V107          59160       543       543       0               0    0      0       543
SPDR S&P Midcap 400    Equity   78467Y107          16034       112       112       0               0    0      0       112
Sara Lee Corporation   Equity   803111103            293        21        21       0               0    0      0        21
Select Sector SPDR
   Energy              Equity   81369Y506         729239     12678     12581      97               0    0      0     12678
Select Sector SPDR
   Utilities           Equity   81369Y886         644808     21740     21285     455               0    0      0     21740
Starbucks Corporation  Equity   855244109           4854       200         0     200               0    0      0       200
Stryker Corporation    Equity   863667101          45776       800       800       0               0    0    100       700
Ameritrade Hldg Corp   Equity   87236Y108         364599     19129     18677     452               0    0      0     19129
TJX Cos Inc New        Equity   872540109         413337      9721      9655      66               0    0      0      9721
Tenneco Automotive
   Inc                 Equity   880349105           2365       100       100       0               0    0      0       100
ADR Teva
   Pharmaceutical Ind  Equity   881624209         619383      9819      9480     339               0    0      0      9819
Tupperware Corp        Equity   899896104          10512       218       218       0               0    0      0       218
US Bancorp Delaware
   New                 Equity   902973304          12940       500       500       0               0    0      0       500
Union Pacific
   Corporation         Equity   907818108          14660       200       200       0               0    0      0       200
United Parcel Service  Equity   911312106           3221        50        50       0               0    0      0        50
Vanguard Consumer
   Discretionary ETF   Equity   92204A108         426129      8140      8078      62               0    0      0      8140
Vanguard Consumer
   Staples ETF         Equity   92204A207         765217     10964     10861     103               0    0      0     10964
Vanguard Financials
   ETF                 Equity   92204A405        1056537     32579     32127     452               0    0      0     32579
Vanguard Health Care
   ETF                 Equity   92204A504         681187     12016     11927      89               0    0      0     12016
Vanguard Industrials
   ETF                 Equity   92204A603         486528      8454      8391      63               0    0      0      8454
Vanguard Materials
   ETF                 Equity   92204A801         494044      6980      6922      58               0    0      0      6980
Vanguard Telecom
   Services ETF        Equity   92204A884         525001      9340      9266      74               0    0      0      9340
Verizon
   Communications      Equity   92343V104          26863       866       866       0               0    0      0       866
ADR Vodafone Group     Equity   92857W209           5221       224       224       0               0    0      0       224





                                                                                
Vulcan Materials
   Company             Equity   929160109           2362        50         0      50               0   50      0        50
Wal-Mart Stores        Equity   931142103         426619      7673      7547     126               0    0      0      7673
Walgreen Company       Equity   931422109         448010     12079     11316     763               0    0      0     12079
Wells Fargo &
   Company New         Equity   949746101        1168836     37559     36413    1146               0    0      0     37559
Whirlpool Corp         Equity   963320106         142916      1638      1638       0               0    0      0      1638
Wizzard Software
   Corporation         Equity   97750V109           1876      5520      5520       0               0    0      0      5520
Xilinx Incorporated    Equity   983919101           5100       200         0     200               0    0      0       200
Zebra Technologies
   Corp Cl A           Equity   989207105          19506       659         0     659               0    0      0       659
Accenture PLC          Equity   G1151C101         324987      7747      7487     260               0    0      0      7747
Seagate Technology
   Shs                 Equity   G7945J104           1826       100       100       0               0    0      0       100
Noble Corporation
   Switzerland         Equity   H5833N103          16728       400       200     200               0    0      0       400
Transocean Ltd         Equity   H8817H100           8638       100         0     100               0    0      0       100
                                          -------------- --------- --------- -------             ---  ---    --- ---------
                                          $43,720,406.00 1,611,374 1,453,589 157,785               0  369    400 1,610,974
                                          ============== ========= ========= =======             ===  ===    === =========