13F-HR 1 c51236e13fvhr.txt FORM 13F-HR 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, 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: CALAMOS PARTNERS LLC Address: 2020 Calamos Court Naperville, Illinois 60563 Form 13F File Number: 028-11885 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: Joseph B. O'Boyle Title: Chief Compliance Officer Phone: (630) 245-7200 Signature, Place, and Date of Signing: /s/ Joseph B. O'Boyle Naperville, Illinois May 6, 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 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: Form 13F Information Table Entry Total: 40 Form 13F Information Table Value Total: $13,046 (thousands)

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6 Column 7 Column 8 --------------------~~----------~~ --------------------- --------- ---------- -------- ----------- -------- ------------------- PRN or Voting Authority Value SHS CALL/ Investment Other ------------------- Title of Issuer Title of Class Cusip (x1000) Amount /PUT Discretion Managers Sole Shared None --------------------~~----------~~ --------------------- --------- ---------- -------- --- ---- ----------- -------- ----- ------ ---- ALLIANT TECHSYSTEMS INC CONVERTIBLE SECURITY 018804AN4 579 600000 prn Sole None 600 0 ALPHA NATURAL RESOURCES INC CONVERTIBLE SECURITY 02076XAA0 ~~324~~326 500000 prn Sole None 500 0 BRISTOW GROUP INC CONVERTIBLE PREFERRED SECURITY 110394400 ~~293~~372 ~~8000~~12000 shs Sole None ~~8000~~12000 0 CARRIZO OIL & GAS CONVERTIBLE SECURITY 144577AA1 ~~501~~456 ~~1100000~~900000 prn Sole None ~~1100~~900 0 CENTRAL EURO DISTRIBUTION CPCORP ~~CONVERTIBLE~~COMMON ~~SECURITY~~STOCK 153435952 3 40 shs PUT Sole None 40 0 CENTRAL EURO DISTRIBUTION CORP COMMON STOCK 153435902 1 35 shs CALL Sole None 35 0 CENTRAL EURO DISTRIBUTION CPCORP CONVERTIBLE SECURITY 153435AA0 ~~295~~226 590000 prn Sole None 590 0 ~~CIENA~~CHARLES ~~CORP~~RIVER LABORATORIES CONVERTIBLE SECURITY ~~171779AE1~~159864AB3 ~~358~~207 ~~1000000~~250000 prn Sole None ~~1000~~250 0 ~~COMMSCOPE~~CIENA ~~INC~~CORP CONVERTIBLE SECURITY ~~203372AD9~~171779AE1 ~~300~~429 ~~300000~~1000000 prn Sole None ~~300~~1000 0 COVANTA HOLDING CORP CONVERTIBLE SECURITY 22282EAA0 ~~458~~395 500000 prn Sole None 500 0 ~~DIGITAL~~EMC ~~RIVER~~CORP - MASS CONVERTIBLE SECURITY ~~25388BAB0~~268648AK8 ~~501~~202 ~~500000~~200000 prn Sole None ~~500~~200 0 EMC CORP - MASS CONVERTIBLE SECURITY 268648AM4 ~~470~~294 ~~500000~~300000 prn Sole None ~~500~~300 0 ENERGY CONVERSION DEVICES INC CONVERTIBLE SECURITY 292659AA7 ~~409~~441 830000 prn Sole None 830 0 EXXON MOBIL CORP COMMON STOCK 30231G102 ~~327~~223 ~~4100~~3275 shs Sole None ~~4100~~3275 0 FEI COMPANY CONVERTIBLE SECURITY 30241LAF6 ~~459~~517 600000 prn Sole None 600 0 GENERAL CABLE CORP CONVERTIBLE SECURITY 369300AD0 ~~350~~422 600000 prn Sole None 600 0 ~~GENERAL~~GENESCO ~~ELECTRIC~~INC COCONVERTIBLE ~~COMMON~~SECURITY ~~STOCK~~371532AN2 ~~369604103~~206 ~~165~~200000 ~~10200~~prn ~~shs~~ Sole None ~~10200~~200 0 ~~HEWLETT-PACKARD CO. COMMON STOCK 428236103 207 5700 shs Sole None 5700 0~~ HLTH CORP CONVERTIBLE SECURITY 94769MAG0 ~~615~~253 ~~750000~~300000 prn Sole None ~~750~~300 0 HORNBECK OFFSHORE SERVICES INC CONVERTIBLE SECURITY 440543AE6 ~~333~~377 600000 prn Sole None 600 0 INFORMATICA CORP CONVERTIBLE SECURITY 45666QAB8 ~~278~~294 300000 prn Sole None 300 0 JA SOLAR HOLDINGS CO CONVERTIBLE SECURITY 466090AA5 ~~420~~498 1000000 prn Sole None 1000 0 JOHNSON &CONTROLS ~~JOHNSON~~INC ~~COMMON~~CONVERTIBLE ~~STOCK~~SECURITY ~~478160104~~478366AS6 ~~215~~380 ~~3600~~300000 ~~shs~~prn Sole None ~~3600~~300 0 LAWSON SOFTWARE INC CONVERTIBLE SECURITY 52078PAA0 ~~350~~355 450000 prn Sole None 450 0 LEGG MASON INC CONVERTIBLE PREFERRED SECURITY 524901303 ~~220~~273 ~~10000~~15000 shs Sole None ~~10000~~15000 0 MACROVISION CORP CONVERTIBLE SECURITY 555904AB7 ~~574~~459 ~~800000~~500000 prn Sole None ~~800~~500 0 MENTOR GRAPHICS CONVERTIBLE SECURITY 587200AD8 ~~870~~253 ~~1000000~~300000 prn Sole None ~~1000~~300 0 MILLIPORE CORP CONVERTIBLE SECURITY 601073AD1 ~~263~~373 ~~300000~~400000 prn Sole None ~~300~~400 0 MYLAN LABORATORIES INC CONVERTIBLE ~~PREFERRED~~ SECURITY ~~628530206~~628530AG2 ~~395~~258 ~~600 shs Sole None 600 0 OMNICOM GRP CONVERTIBLE SECURITY 681919AK2 298~~ 300000 prn Sole None 300 0 ORBITAL SCIENCES CORP CONVERTIBLE SECURITY 685564AN6 ~~275~~334 ~~300000~~400000 prn Sole None ~~300~~400 0 ~~PFIZER INC COMMON STOCK 717081103 354 20000 shs Sole None 20000 0 PSS WORLD MED CONVERTIBLE SECURITY 69366AAB6 338 300000 prn Sole None 300 0~~ SBA COMM CORP CONVERTIBLE SECURITY 78388JAJ5 ~~239~~283 300000 prn Sole None 300 0 SCHOOL SPECIALTY CONVERTIBLE SECURITY 807863AL9 ~~492~~476 700000 prn Sole None 700 0 SMITHFIELD FOODS INC CONVERTIBLE SECURITY 832248AR9 ~~259~~246 350000 prn Sole None 350 0 SONOSITE INC CONVERTIBLE SECURITY 83568GAA2 ~~215~~258 300000 prn Sole None 300 0 SPARTAN STORES CONVERTIBLE SECURITY 846822AE4 ~~544~~421 700000 prn Sole None 700 0 SPSS INC CONVERTIBLE SECURITY 78462KAB8 ~~389~~459 500000 prn Sole None 500 0 ~~SYBASE INC CONVERTIBLE SECURITY 871130AB6 329 300000 prn Sole None 300 0~~ THORATEC CORP CONVERTIBLE SECURITY 885175AB5 ~~240~~201 250000 prn Sole None 250 0 TYSON FOODS CONVERTIBLE SECURITY 902494AP8 ~~406~~266 ~~500000~~300000 prn Sole None ~~500~~300 0 US BANCORP CONVERTIBLE SECURITY 902973AQ9 ~~357~~354 400000 prn Sole None 400 0 VERISIGN INC CONVERTIBLE SECURITY 92343EAD4 ~~317~~331 500000 prn Sole None 500 0 WESCO INTL INC CONVERTIBLE SECURITY 95082PAE5 ~~629~~350 ~~800000~~400000 prn Sole None ~~800~~400 0 ~~15,628,780~~

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