13F-HR 1 jdn13f-q209.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: June 30, 2009 ----------------- 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: JDN Capital Management, LP -------------------------- Address: 2420 Camino Ramon Suite 222 -------------------------- San Ramon, CA 94583 -------------------------- -------------------------- Form 13F File Number: 28- 11131 --------------------- The institutional investment manager filing this report and 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, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: John Nguyen ---------------------------- Title: General Partner ---------------------------- Phone: 925-244-5990 ---------------------------- Signature, Place, and Date of Signing /s/ John Nguyen San Ramon, CA August 3, 2009 --------------------- ------------------------- ----------------- [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 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 managers (s).) FORM13F SUMMARY Report Summary: Number of Other Included Managers: 0 ----------------- Form 13F Information Table Entry Total: 105 ----------------- Form 13F Information Table Value Total: 57,782 ----------------- (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form13F 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.] NONE

column 1 column 2 column 3 column 4 column 5 column 6 column 7 column 8 -------- -------- -------- -------- -------- ---------- -------- -------- ------------------------------------------------------------------------------------------------------------------------------------ Investment Other Voting Authority Name of Issuer Title of Cusip Value Shrs or sh/ put/ Discretion Managers Sole Shared None Class (x$1000) prn amt prn call ------------------ ------- ------- -------- ------- --- ---- ---------- -------- ---- ---- ---- Adaptec Inc com 00651F108 ~~200~~221 83462 SH SOLE 83462 0 0 Amex Energy Select SPDR com 81369Y506 961 20000 SH SOLE 20000 0 0 Amicas Inc com 001712108 ~~538~~712 ~~264839~~256090 SH SOLE ~~264839~~256090 0 0 Anadigics com 032515108 ~~396~~766 ~~191100~~182897 SH SOLE ~~191100~~182897 0 0 Apple Inc com 037833100 ~~349~~473 3320 SH SOLE 3320 0 0 Applied Matls Inc com 038222105 ~~903~~462 ~~84000~~42000 SH SOLE ~~84000~~42000 0 0 Applied Micro Circuits Corp com 03822W406 222 27350 SH SOLE 27350 0 0 Aspen Insurance Holdings Ltd com G05384105 ~~433~~431 19300 SH SOLE 19300 0 0 Avnet Inc com 053807103 ~~1115~~1129 ~~63700~~53700 SH SOLE ~~63700~~53700 0 0 Bank of America Corp com 060505104 ~~361~~434 ~~52900~~32900 SH SOLE ~~52900~~32900 0 0 Bell Microproducts Inc com 078137106 98234 ~~209194~~203194 SH SOLE ~~209194~~203194 0 0 Best Buy Inc com 086516101 ~~437~~837 ~~11500~~25000 SH SOLE ~~11500~~25000 0 0 ~~Borland~~CSX ~~Software~~ Corp com ~~099849101~~126408103 16346 ~~34646~~10000 SH SOLE ~~34646~~10000 0 0 ~~CRM Holdings Ltd com G2554P103 67 102933 SH SOLE 102933 0 0~~ Cadence Design Systems Inc com 127387108 ~~475~~667 112993 SH SOLE 112993 0 0 CalAmp Corp com 128126109 9445 ~~170894~~55894 SH SOLE ~~170894~~55894 0 0 Cerion Tech com 156916108 36 10100 SH SOLE 10100 0 0 Cerner ~~Corp~~ com 156782104 ~~177~~251 4028 SH SOLE 4028 0 0 Chevron Corporation com 166764100 ~~1970~~2272 ~~29300~~34300 SH SOLE ~~29300~~34300 0 0 ~~Cisco Sys Inc com 17275R102 134 8000 SH SOLE 8000 0 0~~ Citigroup Inc com 172967101 89180 ~~35300~~60600 SH SOLE ~~35300~~60600 0 0 Cognex Corp com 192422103 ~~697~~738 52217 SH SOLE 52217 0 0 Comcast Corp com 20030N101 ~~692~~733 50700 SH SOLE 50700 0 0 Commscope Inc com 203372107 ~~201~~466 17736 SH SOLE 17736 0 0 Community Health Sys Inc com 203668108 ~~397~~653 25860 SH SOLE 25860 0 0 ~~Conagra Foods Inc com 205887102 427 25309 SH SOLE 25309 0 0~~ Conmed Corp com 207410101 ~~650~~700 45087 SH SOLE 45087 0 0 ~~Cost~~Cypress ~~Plus~~Semiconductor ~~Inc~~Corp com ~~221485105~~232806109 68309 ~~70383~~33600 SH SOLE ~~70383~~33600 0 0 Cypress ~~Semiconductor~~Sharpridge ~~Corp~~Invts Inc com ~~232806109~~23281A307 ~~227~~325 ~~33600~~27332 SH SOLE ~~33600~~27332 0 0 DSP Group Inc com 23332B106 ~~440~~688 101770 SH SOLE 101770 0 0 Dean Foods Co com 242370104 ~~955~~1013 52805 SH SOLE 52805 0 0 Delia's Inc com 246911101 ~~157~~223 93792 SH SOLE 93792 0 0 Dell Inc com 247025109 ~~287~~416 30300 SH SOLE 30300 0 0 Delsite Inc com 24734R103 1 10300 SH SOLE 10300 0 0 Devon Energy Corp com 25179M103 447 10000 SH SOLE 10000 0 0 Diamond Offshore Drilling Inc com 25271C102 270 4300 SH SOLE 4300 0 0 DreamWorks Animation SKG Inc com 26153C103 866 40000 SH SOLE 40000 0 0 E M C Corp Mass com 268648102 ~~392~~451 34400 SH SOLE 34400 0 0 EBay Inc com 278642103 ~~212~~289 16900 SH SOLE 16900 0 0 Electro Scientific Inds com 285229100 ~~272~~449 ~~45950~~40000 SH SOLE ~~45950~~40000 0 0 ~~Emulex Corp com 292475209 731 145403 SH SOLE 145403 0 0~~ Exar Corp com 300645108 ~~760~~876 121824 SH SOLE 121824 0 0 Federal Mogul Corp com 313549404 ~~395~~127 ~~59091~~13400 SH SOLE ~~59091~~13400 0 0 Flextronics Intl Ltd com Y2573F102 ~~404~~559 ~~139701~~134701 SH SOLE ~~139701~~134701 0 0 ~~FormFactor~~General ~~Inc~~Electric Co com ~~346375108~~369604103 ~~180~~325 ~~10000~~27700 SH SOLE ~~10000~~27700 0 0 ~~Freeport-McMoran~~Grubb ~~Copper~~ & GoEllis ~~com 35671D857 324 8500 SH SOLE 8500 0 0 Future Healthcare com 360911101 0 14600 SH SOLE 14600 0 0 General Electric~~ Co com ~~369604103~~400095204 ~~280~~29 ~~27700~~36653 SH SOLE ~~27700~~36653 0 0 ~~Grubb~~Home &Depot ~~Ellis~~Inc Co com ~~400095204~~437076102 89945 ~~141630~~40000 SH SOLE ~~141630~~40000 0 0 ~~Hertz~~Hot ~~Global~~Topic ~~Holdings~~ Inc com ~~42805T105~~441339108 39480 ~~10000~~65700 SH SOLE ~~10000~~65700 0 0 ICT Group Inc com 44929Y101 ~~282~~337 ~~50591~~38591 SH SOLE ~~50591~~38591 0 0 Imation Corp com 45245A107 ~~288~~266 ~~37602~~35004 SH SOLE ~~37602~~35004 0 0 Ingram Micro com 457153104 ~~870~~1205 68855 SH SOLE 68855 0 0 Intel Corp com 458140100 ~~1711~~1801 ~~113850~~108850 SH SOLE ~~113850~~108850 0 0 Intersil Corp com 46069S109 ~~196~~214 17000 SH SOLE 17000 0 0 ~~Itron Inc com 465741106 161 3400 SH SOLE 3400 0 0~~ JDS Uniphase Corp com 46612J507 ~~344~~606 105982 SH SOLE 105982 0 0 JP Morgan Chase & Co com 46625H100 ~~1045~~945 ~~39300~~27700 SH SOLE ~~39300~~27700 0 0 Jabil Circuit Inc com 466313103 ~~469~~626 84300 SH SOLE 84300 0 0 Jumbo Sports com 481386100 0 20000 SH SOLE 20000 0 0 KBR Inc com 48242W106 1052 76200 SH SOLE 76200 0 0 Kforce Inc com 493732101 130 18486 SH SOLE 18486 0 0 Kraft Foods Inc com 50075N104 223 10000 SH SOLE 10000 0 0 LECG Corp com 523234102 6684 25908 SH SOLE 25908 0 0 LeCroy Corp com 52324W109 88105 27966 SH SOLE 27966 0 0 LifePoint Hospitals Inc com 53219L109 ~~820~~1032 39300 SH SOLE 39300 0 0 Livewire Mobile Inc com 53837P102 6174 ~~472333~~439594 SH SOLE ~~472333~~439594 0 0 Lowes Cos Inc com 548661107 291 15000 SH SOLE 15000 0 0 Mc Donalds com 580135101 ~~2144~~2258 39284 SH SOLE 39284 0 0 McCormick & Schmicks Seafd R com 579793100 ~~236~~461 60539 SH SOLE 60539 0 0 Mediware Information Sys Inc com 584946107 ~~130~~191 31011 SH SOLE 31011 0 0 Mentor Graphics Corp com 587200106 ~~532~~600 ~~119760~~109760 SH SOLE ~~119760~~109760 0 0 Mercer Ins Group Inc com 587902107 ~~341~~379 23865 SH SOLE 23865 0 0 Mercury Computer Sys com 589378108 72121 13100 SH SOLE 13100 0 0 Microsoft Corp com 594918104 ~~375~~485 20400 SH SOLE 20400 0 0 Montpelier Re Holdings Ltd com G62185106 ~~456~~468 35200 SH SOLE 35200 0 0 Motorola Inc com 620076109 ~~315~~493 74400 SH SOLE 74400 0 0 Myers Inds Inc com 628464109 ~~335~~454 54550 SH SOLE 54550 0 0 Mylan Inc com 628530107 ~~1153~~1122 86000 SH SOLE 86000 0 0 Newport Corp com 651824104 ~~207~~272 46923 SH SOLE 46923 0 0 Nokia Corp com 654902204 ~~432~~539 37000 SH SOLE 37000 0 0 Novell Inc com 670006105 ~~449~~478 105502 SH SOLE 105502 0 0 OM Group Inc com 670872100 ~~647~~827 ~~33500~~28500 SH SOLE ~~33500~~28500 0 0 Office Depot Inc com 676220106 ~~120~~417 91400 SH SOLE 91400 0 0 Omnicare Inc com 681904108 730 28328 SH SOLE 28328 0 0 On-Assignment Inc com 682159108 ~~450~~649 165997 SH SOLE 165997 0 0 ~~Owens~~Otix ~~Ill~~Global Inc com ~~690768403~~68906N101 ~~309~~124 ~~21400~~159268 SH SOLE ~~21400~~159268 0 0 Pacific Sunwear Calif Inc com 694873100 ~~129~~263 77731 SH SOLE 77731 0 0 Pantry Inc com 698657103 ~~502~~473 28509 SH SOLE 28509 0 0 Pfizer Inc com 717081103 ~~222~~245 16300 SH SOLE 16300 0 0 Photronics Inc com 719405102 ~~137~~576 142283 SH SOLE 142283 0 0 Plantronics Inc com 727493108 ~~290~~454 24000 SH SOLE 24000 0 0 Powerwave Technologies Inc com 739363109 ~~172~~151 ~~289800~~93559 SH SOLE ~~289800~~93559 0 0 Presstek Inc com 741113104 5537 26776 SH SOLE 26776 0 0 Pride Intl Inc Del com 74153Q102 ~~200~~278 11100 SH SOLE 11100 0 0 Procter & Gamble Co com 742718109 ~~1413~~1533 30000 SH SOLE 30000 0 0 RF MicroDevices Inc com 749941100 ~~150~~424 112781 SH SOLE 112781 0 0 ~~RTI Biologics Inc com 74975N105 161 56505 SH SOLE 56505 0 0 Rackable Systems Inc com 750077109 515 126920 SH SOLE 126920 0 0~~ Radisys Corp com 750459109 ~~367~~548 60632 SH SOLE 60632 0 0 Ruby Tuesday Inc com 781182100 ~~213~~468 ~~73100~~70200 SH SOLE ~~73100~~70200 0 0 SAIA Inc com 81111T102 ~~312~~452 ~~26100~~25100 SH SOLE ~~26100~~25100 0 0 ~~SLM Corp com 78442P106 107 21700 SH SOLE 21700 0 0~~ Safeway Inc com 786514208 ~~1104~~707 ~~54700~~34700 SH SOLE ~~54700~~34700 0 0 Sara Lee Corp com 803111103 ~~843~~1018 104283 SH SOLE 104283 0 0 Service Corp Intl com 817565104 8465 ~~24000~~11801 SH SOLE ~~24000~~11801 0 0 ~~Sonic Innovations Inc com 83545M109 174 162580 SH SOLE 162580 0 0~~ Southwest Airls Co com 844741108 ~~656~~697 103600 SH SOLE 103600 0 0 StarTek Inc com 85569C107 ~~107~~276 34392 SH SOLE 34392 0 0 Starbucks Corp com 855244109 ~~661~~688 ~~59500~~49500 SH SOLE ~~59500~~49500 0 0 Sun Microsystems Inc com 866810104 ~~799~~1006 109150 SH SOLE 109150 0 0 Sunpower Corp Cl B com 867652307 ~~169~~204 8526 SH SOLE 8526 0 0 ~~Symmetricom Inc com 871543104 384 109794 SH SOLE 109794 0 0~~ Synopsys Inc com 871607107 ~~1045~~983 50392 SH SOLE 50392 0 0 TII Network Technologies Inc com 872479209 1017 15000 SH SOLE 15000 0 0 Theragenics Corp com 883375107 ~~398~~421 326330 SH SOLE 326330 0 0 Thomas Weisel Partners Group Inccom 884481102 ~~328~~551 91545 SH SOLE 91545 0 0 Time Warner ~~Cable~~ Inc com ~~88732J207 122 4927 SH SOLE 4927 0 0 Time Warner Inc com~~ 887317303 ~~333~~434 17233 SH SOLE 17233 0 0 Transocean Ltd com G90073100 ~~176~~223 2997 SH SOLE 2997 0 0 ~~Tyco Intl Ltd com H89128104 726 37100 SH SOLE 37100 0 0~~ UCBH Holdings Inc com 90262T308 ~~203~~170 134619 SH SOLE 134619 0 0 United Parcel Service Inc com 911312106 ~~955~~970 19400 SH SOLE 19400 0 0 UnitedHealth Group Inc com 91324P102 216 10300 SH SOLE 10300 0 0 Urologix Inc com 917273104 32 84328 SH SOLE 84328 0 0 Varian Med Sys Inc com 92220P105 457 15000 SH SOLE 15000 0 0 Vignette Corp com 926734104 709 106150 SH SOLE 106150 0 0 Vishay Intertechnology Inc com 928298108 ~~532~~1038 152800 SH SOLE 152800 0 0 Wabash National Corp com 929566107 5632 45500 SH SOLE 45500 0 0 Waste Mgmt Inc com 94106L109 1411 ~~55100~~50100 SH SOLE ~~55100~~50100 0 0 ~~Western Digital Corp com 958102105 193 10000 SH SOLE 10000 0 0 YRC Worldwide Inc com 984249102 122 27100 SH SOLE 27100 0 0~~ Zoran Cop com 98975F101 ~~704~~872 80007 SH SOLE ~~80007~~800007 0 0

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