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, 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: Highland Capital Management, L.P.
Address: 300 Crescent Court, Suite 700, Dallas, Texas 75201

Form 13F File Number: 28-10659

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: James D. Dondero
Title: President
Phone: 972-628-4100

Signature, Place, and Date of Signing:

/s/ James D. Dondero          Dallas, TX                May 13, 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).)




                                             FORM 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 5

Form 13F Information Table Entry Total: 154

Form 13F Information Table Value Total: 1,200,372
                                        (thousands)

List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s) of all
institutional investment managers with respect to which this report is filed,
other than the manager filing this report.

[If there are no entries in this list, state "NONE" and omit the column headings
and list entries.]

No.    Form 13F File Number      Name
__1__  28-_____________________  Cummings Bay Capital Management, L.P.
__2__  28-_____________________  Highland Capital Management Fund Advisors, L.P.
__3__  28-_____________________  Anchor Capital Management Group, Inc.
__4__  28-_____________________  NexPoint Advisors, L.P.
__5__  28-_____________________  Incline Analytics, LLC

[Repeat as necessary.]







                                      TITLE OF                      VALUE      SHRS OR SH/ PUT/ INVESTMENT  OTHER   VOTING AUTHORITY
            NAME OF ISSUER              CLASS               CUSIP  (x$1000)    PRN AMT PRN CALL DISCRETION MANAGERS SOLE SHARED NONE
                                                                                               
ABBOTT LABORATORIES                COMMON STOCK           002824100     551     15,600 SH       SOLE
ABBVIE INC                         COMMON STOCK           00287Y109     636     15,600 SH       SOLE
ACADIA HEALTHCARE CO INC           COMMON STOCK           00404A109   9,771    332,474 SH       DEFINED
ACHILLION PHARMACEUTICALS          COMMON STOCK           00448Q201     563     64,370 SH       SOLE
ACME PACKAGING CORP.               COMMON STOCK           004764106       0    155,179 SH       SOLE
ADCARE HEALTH SYSTEMS INC.         COMMON STOCK           00650W300     192     47,875 SH       SOLE
AEGERION PHARMACEUTICALS INC       COMMON STOCK           00767E102     535     13,267 SH       SOLE
AERCAP HOLDINGS C.V. (DEBIS)       COMMON STOCK           N00985106   8,002    517,918 SH       SOLE
AFLAC INC                          COMMON STOCK           001055102   9,478    182,204 SH       DEFINED
AKORN INC.                         COMMON STOCK           009728106   9,671    699,300 SH       DEFINED
ALLEGHENY TECHNOLOGIES, INC.       COMMON STOCK           01741R102   2,217     69,900 SH       SOLE
ALLIANCE DATA SYSTEMS CORPORATION  COMMON STOCK           018581108  46,633    288,051 SH       SOLE
AMERICAN EXPRESS CO                COMMON STOCK           025816109  73,098  1,083,575 SH       DEFINED
AMERIPRISE FINANCIAL, INC.         COMMON STOCK           03076C106   1,510     20,500 SH       SOLE
AOL INC                            COMMON STOCK           00184X105   7,567    196,595 SH       SOLE
APOLLO GROUP                       COMMON STOCK           037604105   2,585    148,750 SH       SOLE
ARTHROCARE CORPORATION             COMMON STOCK           043136100     662     19,033 SH       SOLE
ARTHUR J GALLAGHER & CO            COMMON STOCK           363576109  12,847    311,000 SH       SOLE
ATHENAHEALTH INC                   COMMON STOCK           04685W103     791      8,148 SH       SOLE
AVI BIOPHARMA INC.                 COMMON STOCK           803607100     305      8,256 SH       SOLE
BANK OF AMERICA CORPORATION        EQUITY WARRANTS        060505146   1,054  1,443,664 SH       SOLE
BE AEROSPACE, INC                  COMMON STOCK           073302101  12,275    203,636 SH       SOLE
BEST BUY CO., INC.                 COMMON STOCK           086516101     324     14,650 SH       SOLE
BIG LOTS INC.                      COMMON STOCK           089302103   7,133    202,250 SH       SOLE
BIOSCRIP, INC.                     COMMON STOCK           09069N108   1,010     79,500 SH       DEFINED
BROOKDALE SENIOR LIVING INC.       COMMON STOCK           112463104  21,548    772,883 SH       DEFINED
BRUKER CORP                        COMMON STOCK           116794108   1,662     87,000 SH       DEFINED
CAPITAL SENIOR LIVING CORPORATION  COMMON STOCK           140475104   1,216     46,000 SH       DEFINED
CARDIOVASCULAR SYSTEMS INC         COMMON STOCK           141619106     907     44,310 SH       SOLE
CB RICHARD ELLIS GROUP INC-A       COMMON STOCK           12504L109   2,291     90,740 SH       SOLE
CBS CORP                           COMMON STOCK           124857202  27,180    582,135 SH       SOLE
CEDAR FAIR LP/CANADA'S WONDERLAND  LTD PARTNERSHIP        150185106  12,000    301,743 SH       SOLE
CERUS CORPORATION                  COMMON STOCK           157085101     182     41,170 SH       SOLE
CHARLES RIVER LABORATORIES         COMMON STOCK           159864107     315      7,115 SH       SOLE
CHUBB CORP., THE                   COMMON STOCK           171232101     341      3,900 SH       SOLE
CITRIX SYSTEMS INC.                COMMON STOCK           177376100  10,487    145,352 SH       SOLE
COGNIZANT TECHNOLOGY SOLUTIONS
  CORPORATION                      COMMON STOCK           192446102  14,430    188,325 SH       SOLE
COLGATE PALMOLIVE CO.              COMMON STOCK           194162103     555      4,700 SH       SOLE
COMPLETE GENOMICS, INC.            EQUITY                 20454K104     372    132,087 SH       SOLE
COMPUWARE CORPORATION              COMMON STOCK           205638109  12,348    988,619 SH       SOLE
CONN'S INC                         COMMON STOCK           208242107  11,984    333,442 SH       SOLE
CONTINENTAL RESOURCES INC/OK       COMMON STOCK           212015101  23,367    268,800 SH       SOLE
CORNING INC.                       COMMON STOCK           219350105   4,388    329,200 SH       SOLE
CORRECTIONS CORPORATION OF AMERICA EQUITY                 22025Y407   8,289    212,150 SH       SOLE
COVANCE INC.                       COMMON STOCK           222816100     610      8,213 SH       SOLE
CREDIT SUISSE ASSET MGMT INC       CLOSE END FIXED INCOME
                                    MUTUAL FUNDS          224916106      50     12,254 SH       SOLE
CREDIT SUISSE HIGH YIELD BD        CLOSE END FIXED INCOME
                                    MUTUAL FUNDS          22544F103      51     15,575 SH       SOLE
CSX CORPORATION                    COMMON STOCK           126408103   9,556    388,000 SH       SOLE
DEVRY INC.                         COMMON STOCK           251893103   3,212    101,150 SH       SOLE
DIGITALGLOBE, INC.                 COMMON STOCK           25389M877  14,018    484,900 SH       SOLE
DIRECTV GROUP, INC., THE           COMMON STOCK           25490A309     716     12,650 SH       SOLE
DR PEPPER SNAPPLE GROUP, INC.      COMMON STOCK           26138E109   3,035     64,650 SH       SOLE
DUNKIN' BRANDS, INC.               COMMON STOCK           265504100  17,500    474,512 SH       SOLE
EDWARDS LIFESCIENCES CORPORATION   COMMON STOCK           28176E108   1,857     22,600 SH       SOLE
ELI LILLY & CO                     COMMON STOCK           532457108   9,745    171,600 SH       SOLE
ELLSWORTH FUND LTD                 CLOSE END FIXED INCOME
                                    MUTUAL FUNDS          289074106     105     13,700 SH       SOLE
EMERITUS CORP                      COMMON STOCK           291005106   1,251     45,000 SH       DEFINED
ENDOCYTE INC                       COMMON STOCK           29269A102   2,040    163,829 SH       DEFINED
ENDOLOGIX INC.                     COMMON STOCK           29266S106     489     30,282 SH       SOLE
ENTERPRISE PRODUCTS PARTNERS LP    LTD PARTNERSHIP        293792107     225      3,737 SH       SOLE
E-TRACS UBS LONG PLAT ETN          EXCHANGE TRADED FUNDS  902641786     179     10,000 SH       SOLE
EXAMWORKS INC                      COMMON STOCK           30066A105     644     37,185 SH       SOLE
EXXON MOBIL CORPORATION            COMMON STOCK           30231G102     514      5,700 SH       SOLE
FAIRPOINT COMMUNICATIONS, INC.     COMMON STOCK           305560302   1,686    225,708 SH       DEFINED
FAMILY DOLLAR STORES, INC.         COMMON STOCK           307000109  12,671    214,575 SH       SOLE
FASTENAL CO.                       COMMON STOCK           311900104  10,795    210,300 SH       SOLE
FEDEX CORPORATION                  COMMON STOCK           31428X106  20,160    205,300 SH       SOLE
FLUIDIGM CORP                      COMMON STOCK           34385P108     296     15,996 SH       SOLE
FOREST LABORATORIES INC.           COMMON STOCK           345838106     565     14,864 SH       SOLE
GAMESTOP CORPORATION               COMMON STOCK           36467W109   1,231     44,000 SH       SOLE
GARMIN LTD.                        COMMON STOCK           H2906T109   5,191    157,050 SH       SOLE
GENTIVA HEALTH SERVICES, INC.      COMMON STOCK           37247A102     143     13,255 SH       SOLE
GILEAD SCIENCES, INC.              COMMON STOCK           375558103   1,216     24,840 SH       SOLE
GNC ACQUISITION HOLDINGS INC       COMMON STOCK           36191G107  15,272    388,790 SH       SOLE
GOOGLE INC-CL A                    COMMON STOCK           38259P508   9,356     11,780 SH       SOLE
GRAY TELEVISION, INC.              COMMON STOCK           389375205      74     18,000 SH       SOLE
GREATBATCH INC.                    COMMON STOCK           39153L106     247      8,268 SH       SOLE
HCA HOLDINGS INC.                  COMMON STOCK           40412C101   1,832     45,100 SH       DEFINED
HEALTH MANAGEMENT ASSOCIATES       COMMON STOCK           421933102   1,261     98,000 SH       DEFINED
HEALTHCARE SERVICES GROUP          COMMON STOCK           421906108     848     33,087 SH       SOLE
HEALTHSOUTH CORPORATION            COMMON STOCK           421924309   1,345     51,000 SH       DEFINED
HEALTHSTREAM INC.                  COMMON STOCK           42222N103   1,444     62,967 SH       DEFINED
HERTZ GLOBAL HOLDINGS INC.         COMMON STOCK           42805T105  20,321    912,915 SH       SOLE
HORIZON PHARMA INC                 COMMON STOCK           44047T109     108     40,000 SH       SOLE
HYPERION THERAPEUTICS INC          COMMON STOCK           44915N101     333     12,902 SH       SOLE
ICON PLC - SPONSORED ADR           COMMON STOCK           G4705A100   1,548     47,948 SH       DEFINED
INBEV NV                           COMMON STOCK           03524A108  12,195    122,500 SH       SOLE
INFORMATICA CORPORATION            COMMON STOCK           45666Q102  10,828    314,129 SH       SOLE
INTERCEPT PHARMACEUTICALS INC      COMMON STOCK           45845P108     459     12,276 SH       SOLE
ISHARES MSCI CANADA                EXCHANGE TRADED FUNDS  464286509     998     35,000 SH       SOLE
JPMORGAN CHASE & CO.               COMMON STOCK           46625H100   9,096    191,650 SH       SOLE
K12 INC                            COMMON STOCK           48273U102   2,742    113,737 SH       SOLE
KERYX BIOPHARMACEUTICALS INC.      COMMON STOCK           492515101     578     82,000 SH       DEFINED
LAZARD LTD                         LTD PARTNERSHIP        G54050102  11,950    350,144 SH       SOLE
LIFE TIME FITNESS                  COMMON STOCK           53217R207  21,441    501,192 SH       SOLE
LORAL COMMUNICATIONS               OPTIONS                543881906  46,599     18,000 SH  CALL SOLE
MANAGED HI YLD PLUS FUND INC       CLOSE END FIXED INCOME
                                    MUTUAL FUNDS          561911108      50     23,040 SH       SOLE
MARKET VECTORS STEEL INDEX F       EXCHANGE TRADED FUNDS  57060U308     261      6,000 SH       SOLE
MCJUNKIN RED MAN CORPORATION       COMMON STOCK           55345K103  14,772    448,600 SH       SOLE
MEDIVATION INC.                    COMMON STOCK           58501N101   1,263     27,000 SH       DEFINED
METROPCS COMMUNICATIONS            COMMON STOCK           591708102  40,213  3,689,245 SH       DEFINED
METROPCS COMMUNICATIONS            OPTIONS                591708902     385      1,000 SH  CALL SOLE
MICHAEL KORS HOLDINGS LTD          COMMON STOCK           G60754101  29,420    518,050 SH       SOLE
MICROSOFT CORPORATION              COMMON STOCK           594918104  12,048    421,200 SH       SOLE
MICROVISION, INC.                  EQUITY WARRANTS        594960163      11    402,361 SH       DEFINED
MOLINA HEALTHCARE, INC             COMMON STOCK           60855R100     276      8,935 SH       SOLE
MONOLITHIC POWER SYSTEM INC.       COMMON STOCK           609839105  13,378    548,934 SH       SOLE
MORGAN STANLEY                     COMMON STOCK           617446448  18,796    855,150 SH       SOLE
NETAPP INC                         COMMON STOCK           64110D104     502     14,700 SH       SOLE
NEWS CORP-CLASS B                  COMMON STOCK           65248E104  14,575    477,700 SH       SOLE
NEXPOINT CREDIT STRATEGIES FUND
  (FKA HIGHLAND CREDIT STRATEGIES
  FUND)                            CLOSE END FIXED INCOME
                                    MUTUAL FUNDS          65340G106   5,058    658,581 SH       SOLE
NORFOLK SOUTHERN CORPORATION       COMMON STOCK           655844108   4,794     62,200 SH       SOLE
NOVADAQ TECHNOLOGIES INC           COMMON STOCK           66987G102     357     36,071 SH       SOLE
NPS PHARMACEUTICALS                COMMON STOCK           62936P103   1,356    132,922 SH       DEFINED
NUPATHE INC                        COMMON STOCK           67059M100     128     37,229 SH       SOLE
NXP SEMICONDUCTOR NV               COMMON STOCK           N6596X109   7,838    258,750 SH       SOLE
OCCULOGIX INC.                     COMMON STOCK           878193101     483     70,000 SH       DEFINED
OMNICELL INC.                      COMMON STOCK           68213N109     429     22,745 SH       SOLE
ORASURE TECHNOLOGIES INC.          COMMON STOCK           68554V108     172     31,834 SH       SOLE
PAREXEL INTERNATIONAL CORPORATION  COMMON STOCK           699462107     328      8,289 SH       SOLE
PENDRELL CORPORATION ( F.K.A. ICO
  GLOBAL COMMUNICATIONS)           COMMON STOCK           70686R104  75,715 45,611,145 SH       DEFINED
PFIZER, INC.                       COMMON STOCK           717081103   9,769    338,500 SH       SOLE
PIMCO 0-5 YEAR H/Y CORP BOND       EXCHANGE TRADED FUNDS  72201R783     523      5,000 SH       SOLE
PLAINS ALL AMER PIPELINE LP        LTD PARTNERSHIP        726503105     223      3,945 SH       SOLE
PROGENICS PHARMACEUTICALS          COMMON STOCK           743187106  11,765  2,186,853 SH       SOLE
PROSHARES ULTRA SILVER             EXCHANGE TRADED FUNDS  74347W841  27,256    722,000 SH       SOLE
QUANTA SERVICES                    COMMON STOCK           74762E102  17,654    617,700 SH       SOLE
RELIANCE STEEL & ALUMINUM          COMMON STOCK           759509102     228      3,200 SH       SOLE
REPROS THERAPEUTICS INC.           COMMON STOCK           76028H209   1,208     75,000 SH       DEFINED
SBA TELECOMMUNICATIONS INC.        COMMON STOCK           78388J106  20,772    288,496 SH       SOLE
SEQUENOM INC.                      COMMON STOCK           817337405     753    181,385 SH       DEFINED
SIRONA DENTAL SYSTEMS INC.         COMMON STOCK           82966C103     754     10,223 SH       SOLE
SKILLED HEALTHCARE GROUP, INC.     COMMON STOCK           83066R107     588     89,491 SH       DEFINED
SNLN US                            EXCHANGE TRADED FUNDS  430101774  38,191  1,900,000 SH       DEFINED
SPDR LEHMAN HIGH YIELD BOND        EXCHANGE TRADED FUNDS  78464A417   3,700     90,000 SH       SOLE
SPDR TRUST SERIES 1                EXCHANGE TRADED FUNDS  78462F103     940      6,000 SH       SOLE
SPIRIT REALTY CAPITAL, INC. (FKA
  SPIRIT FINANCE CORPORATION)      EQUITY                 84860F109  63,101  3,321,123 SH       DEFINED
SPRINT NEXTEL CORPORATION          COMMON STOCK           852061100  10,851  1,747,300 SH       SOLE
STAPLES INC.                       COMMON STOCK           855030102  13,791  1,027,650 SH       SOLE
SWS GROUP INC.                     COMMON STOCK           78503N107   8,981  1,484,432 SH       DEFINED
SYMANTEC CORPORATION               COMMON STOCK           871503108  26,181  1,060,800 SH       SOLE
TIME WARNER INC.                   COMMON STOCK           887317303   4,079     70,800 SH       SOLE
TORCHMARK CORP.                    COMMON STOCK           891027104   4,802     80,300 SH       SOLE
TORNIER NV                         COMMON STOCK           N87237108     663     35,170 SH       SOLE
ULTRASHORT QQQ PROSHARES           EXCHANGE TRADED FUNDS  74347X237     259     10,000 SH       SOLE
ULTRASHORT RUSSELL2000 PROSH       EXCHANGE TRADED FUNDS  74348A202   7,568    383,400 SH       SOLE
UNITED STATES STEEL CORP.          COMMON STOCK           912909108   4,709    241,500 SH       SOLE
VANDA PHARMACEUTICALS INC.         COMMON STOCK           921659108     451    115,000 SH       DEFINED
VANGUARD HEALTH HOLDING COMPANY
  II, LLC (VANGUARD HEALTH SYSTEM,
  INC.)                            COMMON STOCK           922036207     387     26,034 SH       SOLE
VISTEON CORPORATION                COMMON STOCK           92839U206   4,835     83,800 SH       SOLE
VOCERA COMMUNICATIONS INC          COMMON STOCK           92857F107     807     35,095 SH       SOLE
VODAFONE GROUP PLC                 EQUITY                 92857W209  12,090  4,237,600 SH       SOLE
WRIGHT MEDICAL GROUP INC.          EQUITY WARRANTS        98235T115      75     30,000 SH       SOLE
XEROX CORPORATION                  COMMON STOCK           984121103   5,911    687,350 SH       SOLE