UNITED STATES SECURITIES & 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: Petroleum & Resources Corporation Address: 7 St. Paul Street, Suite 1140 Baltimore, MD 21202 Form 13F File Number: 28-596 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: Christine M. Sloan Title: Assistant Treasurer Phone: (410) 752-5900 Signature, Place, and Date of Signing: /s/ Christine M. Sloan Baltimore, MD April 25, 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: 0 Form 13F Information Table Entry Total: 48 Form 13F Information Table Value Total: $783,368 (in 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. NONE COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 NAME OF ISSUER TITLE CUSIP VALUE SHRS OR SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY OF CLASS (x $1000) PRN AMT PRN CALL DISCRETN MANAGER SOLE SHARED NONE ANADARKO PETROLEUM CORP. COM 032511107 26,235 300,000 SH SOLE 300,000 BAKER HUGHES, INC. COM 057224107 2,785 60,000 SH SOLE 60,000 CF INDUSTRIES HOLDINGS, INC. COM 125269100 16,004 84,069 SH SOLE 84,069 CHEVRON CORP. COM 166764100 98,621 830,000 SH SOLE 830,000 CONOCOPHILLIPS COM 20825C104 16,527 275,000 SH SOLE 275,000 DEVON ENERGY CORP. COM 25179M103 8,463 150,000 SH SOLE 150,000 DOW CHEMICAL CO. COM 260543103 17,512 550,000 SH SOLE 550,000 E.I. DUPONT DE NEMOURS AND CO. COM 263534109 6,145 125,000 SH SOLE 125,000 EASTMAN CHEMICAL CO. COM 277432100 11,598 166,000 SH SOLE 166,000 ENERGEN CORP. COM 29265N108 9,102 175,000 SH SOLE 175,000 EOG RESOURCES, INC. COM 26875P101 19,851 155,000 SH SOLE 155,000 EQT CORP. COM 26884L109 9,485 140,000 SH SOLE 140,000 EXXON MOBIL CORP. COM 30231G102 129,166 1,433,430 SH SOLE 1,433,430 FMC CORP. COM 302491303 8,555 150,000 SH SOLE 150,000 FMC TECHNOLOGIES, INC. COM 30249U101 5,439 100,000 SH SOLE 100,000 FREEPORT-MCMORAN COPPER & GOLD COM 35671D857 16,120 487,000 SH SOLE 487,000 HALLIBURTON CO. COM 406216101 17,174 425,000 SH SOLE 425,000 HESS CORP. COM 42809H107 23,273 325,000 SH SOLE 325,000 HOLLYFRONTIER CORP. COM 436106108 5,660 110,000 SH SOLE 110,000 KINDER MORGAN INC. COM 49456B101 9,670 250,000 SH SOLE 250,000 LYONDELLBASELL INDUSTRIES N.V. SHS-A N53745100 14,240 225,000 SH SOLE 225,000 MARATHON OIL CORP. COM 565849106 8,430 250,000 SH SOLE 250,000 MARATHON PETROLEUM CORP. COM 56585A102 17,024 190,000 SH SOLE 190,000 MIDSTATES PETROLEUM CO., INC. COM 59804T100 2,138 250,000 SH SOLE 250,000 NABORS INDUSTRIES, LTD. SHS G6359F103 5,174 319,000 SH SOLE 319,000 NATIONAL FUEL GAS CO. COM 636180101 6,135 100,000 SH SOLE 100,000 NATIONAL OILWELL VARCO, INC. COM 637071101 17,687 250,000 SH SOLE 250,000 NEW JERSEY RESOURCES CORP. COM 646025106 11,571 258,000 SH SOLE 258,000 NEWFIELD EXPLORATION CO. COM 651290108 1,794 80,000 SH SOLE 80,000 NOBLE ENERGY, INC. COM 655044105 21,975 190,000 SH SOLE 190,000 OASIS PETROLEUM, INC. COM 674215108 5,711 150,000 SH SOLE 150,000 OCCIDENTAL PETROLEUM CORP. COM 674599105 32,132 410,000 SH SOLE 410,000 OIL STATES INTERNATIONAL, INC. COM 678026105 8,157 100,000 SH SOLE 100,000 PEABODY ENERGY CORP. COM 704549104 4,282 202,440 SH SOLE 202,440 PHILLIPS 66 COM 718546104 24,159 345,275 SH SOLE 345,275 PIONEER NATURAL RESOURCES CO. COM 723787107 12,425 100,000 SH SOLE 100,000 POTASH CORP OF SASKATCHEWAN COM 73755L107 9,420 240,000 SH SOLE 240,000 PRAXAIR, INC. COM 74005P104 16,731 150,000 SH SOLE 150,000 QEP RESOURCES, INC. COM 74733V100 5,254 165,000 SH SOLE 165,000 ROYAL DUTCH SHELL SPONS ADR A780259206 3,317 50,903 SH SOLE 50,903 SCHLUMBERGER LTD. COM 806857108 46,806 625,000 SH SOLE 625,000 SEADRILL LTD. SHS G7945E105 7,442 200,003 SH SOLE 200,003 SOUTHWESTERN ENERGY CO. COM 845467109 2,049 55,000 SH SOLE 55,000 SPDR GOLD TRUST GOLD SHS 78463V107 12,356 80,000 SH SOLE 80,000 SPECTRA ENERGY CORP. COM 847560109 901 29,312 SH SOLE 29,312 TRANSOCEAN LTD. REG SHS H8817H100 8,833 170,000 SH SOLE 170,000 WEATHERFORD INT'L. LTD REG H27013103 4,856 400,000 SH SOLE 400,000 WILLIAMS COMPANIES, INC. COM 969457100 14,984 400,000 SH SOLE 400,000 783,368