13F-HR 1 f13fa110c.txt 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, 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: Mason Capital Partners Address: 50 Congress St. Suite 843 Boston, MA 02109 13F File Number: 028-10262 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 submission. Person Signing this Report on Behalf of Reporting Manager: Name: Albert D. Mason Title: Chief Compliance Officer Phone: 617-228-5190 Signature, Place, and Date of Signing: /s/ Albert Mason Boston, MA April 19, 2010 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: 0 Form 13F Information Table Entry Total: 137 Form 13F Information Table Value Total: $412,514 (thousands) List of Other Included Managers: {None} FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ INVSTMT NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN DSCRETN AMP NZ Office Trust COM 609327903 898 1686954 SH Sole Air Products & Chemicals Inc. COM 009158106 4652 62910 SH Sole Alexandria Real Estate 8.375 Pfd C PFD 015271406 1303 51800 SH Sole Amerigas Partners LP COM 030975106 4739 118230 SH Sole Anadarko Petroleum Corp. COM 032511107 4339 59580 SH Sole Aptargroup, Inc COM 038336103 4824 122600 SH Sole Automatic Data Processing Inc. COM 053015103 5263 118340 SH Sole B & G Foods Inc. COM 05508R106 1506 143725 SH Sole Bank of Ireland ADR ADR 46267Q103 2 270 SH Sole Bemis Co. Inc. COM 081437105 4185 145720 SH Sole Brady Corp. COM 104674106 3990 128225 SH Sole Brandywine Realty Trust COM 105368203 1 120 SH Sole Brandywine Realty Trust 7.5 Pfd C PFD 105368401 3669 158294 SH Sole Buckeye Partners LP UNIT LTD PARTN 118230101 7568 125980 SH Sole C.R. Bard Inc. COM 067383109 683 7890 SH Sole CBL & Associates Inc. 7.75 Pfd C PFD 124830506 2606 117185 SH Sole CPL Resources PLC COM G4817M109 265 78390 SH Sole Cedar Shopping Centers 8.875 Pfd A PFD 150602308 2607 106899 SH Sole Cherokee Inc. COM 16444H102 22 1205 SH Sole ChinaEdu Corp. COM 16945L107 805 100069 SH Sole Church & Dwight Co., Inc. COM 171340102 241 3605 SH Sole Clorox Co. COM 189054109 5013 78150 SH Sole Colgate-Palmolive Co. COM 194162103 7019 82330 SH Sole Colonial Properties Trust 8.125 Pfd D PFD 195872403 2811 116880 SH Sole Cominar REIT COM 199910100 5749 303445 SH Sole Commercial Vehicle Group Inc. COM 202608105 3 450 SH Sole Corn Products International Inc. COM 219023108 4074 117535 SH Sole Corporate Office Prop. Trust 7.5 Pfd H PFD 22002T603 1951 82305 SH Sole DPL, Inc. COM 233293109 5136 188890 SH Sole Deswell Industries Inc. COM 250639101 6 1325 SH Sole Digital Realty 7.875 Pfd B PFD 253868301 2096 84535 SH Sole Digital Realty 8.5 Pfd A PFD 253868202 775 30150 SH Sole Ecolab, Inc. COM 278865100 5150 117170 SH Sole Emerson Electric Co. COM 291011104 4870 96740 SH Sole Energias de Portugal, SA ADR ADR 268353109 828 20920 SH Sole Enerplus Resources Fund Trust COM 29274D604 2148 90595 SH Sole Enterprise Products Partners LP UNIT LTD PARTN 293792107 6863 198460 SH Sole Exxon Mobil Corp. COM 30231G102 5105 76220 SH Sole Ferrellgas Partners LP UNIT LTD PARTN 315293100 4831 211340 SH Sole First Industrial Realty Trust 7.25 Pfd J PFD 32054K798 1750 86825 SH Sole Fiserv Inc. COM 337738108 5231 103045 SH Sole GMX Resources Inc. 9.25 Pfd B PFD 38011M405 1373 61700 SH Sole General Electric Co. COM 369604103 539 29605 SH Sole General Mills Inc. COM 370334104 5481 77430 SH Sole Getty Realty Corp. COM 374297109 4054 173265 SH Sole Gladstone Commercial Corp. COM 376536108 2253 155920 SH Sole Gladstone Commercial Corp. 7.5 Pfd B PFD 376536306 1439 67419 SH Sole Gladstone Commercial Corp. 7.75 Pfd A PFD 376536207 1153 50097 SH Sole GlaxoSmithKline PLC PFD 37733W105 1957 50800 SH Sole Global Partners LP UNIT LTD PARTN 37946R109 1362 60930 SH Sole Graco, Inc. COM 384109104 4906 153310 SH Sole Grainger, WW Inc. COM 384802104 5882 54400 SH Sole Grontmij NV-CVA COM N37558199 1490 66718 SH Sole Grupo Aeroportuario Del Pacifico SA ADR COM 400506101 2277 61510 SH Sole Heineken NV COM N39427211 564 10952 SH Sole Heineken NV ADR ADR 423012202 5356 209220 SH Sole Highwood Properties 8 Pfd B PFD 431284306 2151 86104 SH Sole Hormel Foods Corp. COM 440452100 4929 117330 SH Sole Huaneng Power ADR ADR 443304100 3894 167555 SH Sole Infosys Technologies Ltd. ADR ADR 456788108 5677 96535 SH Sole Irish Life & Permanent COM B59NF0903 15 3675 SH Sole Irish Life & Permanent Group (UK) COM B59NXW903 3 700 SH Sole Jacob Engineering Group COM 469814107 5429 120130 SH Sole Johnson & Johnson COM 478160104 5729 87865 SH Sole Kilroy Realty Corp. 7.8 Pfd E PFD 49427F405 2671 109930 SH Sole Kimco Realty Corp. 7.75 Pfd G PFD 49446R844 2015 79755 SH Sole Kinder Morgan Energy Partners LP UNIT LTD PARTN 494550106 6965 106469 SH Sole Kinder Morgan Management COM 49455U100 474 8078.45 SH Sole LBA Realty Fund II WBP Inc. 7.625 Pfd B PFD 501777304 6336 422370 SH Sole Lakeview Hotel REIT A COM 512223306 97 262200 SH Sole Lakeview Hotel REIT B COM 512223108 46 123600 SH Sole Lanesborough REIT COM 515555100 145 233250 SH Sole Lexington Realty Trust 8.05 Pfd B PFD 529043200 1290 54625 SH Sole Liberty Property Trust COM 531172104 2538 74780 SH Sole Logitech International SA COM H50430232 3927 240300 SH Sole Mack-Cali Realty Corp. COM 554489104 3591 101865 SH Sole Marathon Oil Corp. COM 565849106 4492 141971 SH Sole Marshall & Ilsley Corp. COM 571837103 2 300 SH Sole McCormick & Co. Inc. COM 579780206 4764 124200 SH Sole McDonald's Corp. COM 580135101 5776 86570 SH Sole Mechel Open Joint Stock Co. ADR ADR 583840103 4204 147915 SH Sole Mettler-Toledo International, Inc. COM 592688105 6535 59840 SH Sole Mid-America Apartment Comm. Inc. 8.3 Pfd PFD 59522J806 2488 96825 SH Sole Monmouth REIT 7.625 Pfd A PFD 609720206 23 1000 SH Sole Monmouth Real Estate Investment Corp. COM 609720107 4839 575360.38 SH Sole NPB Cap Trust II 7.85 Pfd PFD 62935R209 347 14545 SH Sole Narrowstep Inc. COM 631082203 0 1000 SH Sole National Grid PLC ADR COM 636274300 4736 97150 SH Sole Norfolk & Southern Corp. COM 655844108 7228 129330 SH Sole Novartis AG ADR ADR 66987V109 5949 109970 SH Sole Old Second Cap Trust I 7.8 Pfd PFD 680280104 883 122806 SH Sole Omnicom Group COM 681919106 3621 93295 SH Sole Oneok Inc. COM 682680103 392 8595 SH Sole Oneok Partners LP UNIT LTD PARTN 68268N103 6490 105920 SH Sole PS Business Parks Inc. 7.375 Pfd O PFD 69360J750 2596 107985 SH Sole Parker Hannafin COM 701094104 3 50 SH Sole Patriot Coal Corp. COM 70336T104 3211 156942 SH Sole Paychex, Inc. COM 704326107 4741 154325 SH Sole Peabody Energy Corp. COM 704549104 5246 114785 SH Sole Pengrowth Energy Trust COM 706902509 963 82575 SH Sole Penn Virginia Resources LP UNIT LTD PARTN 707884102 3099 132145 SH Sole Penn West Energy Trust COM 707885109 2608 123503 SH Sole PetroChina Ltd. ADS ADR 71646E100 4011 34215 SH Sole Plains All American Pipeline LP UNIT LTD PARTN 726503105 6736 118385 SH Sole Praxair, Inc. COM 74005P104 4485 54040 SH Sole Primaris Retail REIT COM 74157U950 5235 316140 SH Sole Prosperity Bancshares Inc. COM 743606105 5162 125945 SH Sole Ramco Gershenson Properties Trust COM 751452202 48 4300 SH Sole Realty Income Corp. COM 756109104 3833 124885 SH Sole Realty Income Corp. 6.75 Pfd E PFD 756109708 3106 125510 SH Sole Rostelecom Long Distance ADR ADR 778529107 753 25315 SH Sole SNC-Lavalin Group Inc. COM 78460T105 4961 101445 SH Sole Sanofi-Aventis ADR ADR 80105N105 2000 53545 SH Sole Sasol Ltd. ADR ADR 803866300 3991 96705 SH Sole Saul Centers 8 Pfd A PFD 804395200 3143 130099 SH Sole Schneider Electric SA COM 483410007 5007 42615 SH Sole Sherwin-Williams Co. PFD 824348106 1609 23775 SH Sole Sonic Automotive Inc COM 83545G102 3 280 SH Sole St. Gobain COM 738048909 1721 35725 SH Sole State Street Corp. COM 857477103 4751 105245 SH Sole Sterling Bank Cap Trust III 8.3 Pfd PFD 85915Q206 452 19020 SH Sole Sunoco Logistics Partners LP UNIT LTD PARTN 86764L108 6677 97470 SH Sole TC Pipelines LP UNIT LTD PARTN 87233Q108 6063 159472 SH Sole Teekay LNG Partners LP PFD Y8564M105 660 22095 SH Sole Toronto Dominion Bank COM 891160509 6195 83068 SH Sole Total SA ADR ADR 89151E109 6382 110000 SH Sole Tullow Oil PLC COM 015008907 5598 295235 SH Sole UMH Properties Inc. COM 903002103 37 4510 SH Sole Urstadt Biddle Properties A COM 917286205 1846 116730 SH Sole Urstadt Biddle Properties B COM 917286106 354 24920 SH Sole Urstadt Biddle Properties Inc. 7.5 Pfd D PFD 917286502 2516 105930 SH Sole Vornado Realty Trust 6.625 Pfd G PFD 929042802 562 25200 SH Sole Vornado Realty Trust 6.625 Pfd I PFD 929042877 1940 85370 SH Sole Vornado Realty Trust 6.75 Pfd H PFD 929042885 407 17880 SH Sole Weingarten Realty Investors 6.50 Pfd F PFD 948741889 2374 109900 SH Sole Weingarten Realty Investors 6.95 Pfd E PFD 948741608 84 3600 SH Sole Zion Cap Trust 8 Pfd B PFD 989703202 992 40475 SH Sole