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: The Adams Express Company Address: 7 St. Paul Street, Suite 1140 Baltimore, MD 21202 Form 13F File Number:28-597 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: 104 Form 13F Information Table Value Total: $1,252,345 (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 ACE LTD. SHS H0023R105 14,680 165,000 SH SOLE 165,000 AFFILIATED MANAGERS GROUP, INC. COM 008252108 7,940 51,700 SH SOLE 51,700 AMERICAN CAMPUS COMMUNITIES INC. COM 024835100 4,081 90,000 SH SOLE 90,000 ANADARKO PETROLEUM CORP. COM 032511107 4,372 50,000 SH SOLE 50,000 APPLE INC. COM 037833100 41,165 93,000 SH SOLE 93,000 AT&T CORP. COM 00206R102 20,180 550,000 SH SOLE 550,000 AUTOMATIC DATA PROCESSING, INC. COM 053015103 13,004 200,000 SH SOLE 200,000 AXIS CAPITAL HOLDINGS, LTD. SHS G0692U109 9,156 220,000 SH SOLE 220,000 BANK OF AMERICA CORP. COM 060505104 10,109 830,000 SH SOLE 830,000 BANK OF NEW YORK MELLON CORP. COM 064058100 9,062 323,775 SH SOLE 323,775 BED BATH & BEYOND INC. COM 075896100 13,850 215,000 SH SOLE 215,000 BOEING CO. COM 097023105 18,028 210,000 SH SOLE 210,000 BROADCOM CORP. CL A 111320107 7,801 225,000 SH SOLE 225,000 BUNGE LTD. COM G16962105 7,383 100,000 SH SOLE 100,000 CALPINE CORP. COM NEW 131347304 6,180 300,000 SH SOLE 300,000 CAPITAL ONE FINANCIAL CORP. COM 14040H105 13,463 245,000 SH SOLE 245,000 CATAMARAN CORP. COM 148887102 9,545 180,000 SH SOLE 180,000 CATERPILLAR INC. COM 149123101 10,436 120,000 SH SOLE 120,000 CELGENE CORP. COM 151020104 13,909 120,000 SH SOLE 120,000 CENTURYLINK INC. COM 156700106 12,120 345,000 SH SOLE 345,000 CF INDUSTRIES HOLDINGS, INC. COM 125269100 7,335 38,531 SH SOLE 38,531 CHEVRON CORP. COM 166764100 16,754 141,000 SH SOLE 141,000 CISCO SYSTEMS, INC. COM 17275R102 14,637 700,000 SH SOLE 700,000 COACH INC. COM 189754104 6,499 130,000 SH SOLE 130,000 COCA-COLA CO. COM 191216100 12,132 300,000 SH SOLE 300,000 COGNIZANT TECHNOLOGY SOLUTIONS CL A 192446102 12,258 160,000 SH SOLE 160,000 CONSOL ENERGY INC. COM 20854P109 2,480 73,700 SH SOLE 73,700 COVIDIEN PLC SHS G2554F113 8,141 120,000 SH SOLE 120,000 CVS/CAREMARK CORP. COM 126650100 16,222 295,000 SH SOLE 295,000 DIAGEO PLC ADR SPON ADR NEW 25243Q205 6,292 50,000 SH SOLE 50,000 DIGITAL REALTY TRUST INC. COM 253868103 6,022 90,000 SH SOLE 90,000 DOLLAR GENERAL CORP. COM 256677105 12,645 250,000 SH SOLE 250,000 DOW CHEMICAL CO. COM 260543103 5,572 175,000 SH SOLE 175,000 EASTMAN CHEMICAL CO. COM 277432100 5,939 85,000 SH SOLE 85,000 EATON CORP. SHS G29183103 12,556 205,000 SH SOLE 205,000 EBAY INC. COM 278642103 15,182 280,000 SH SOLE 280,000 EMERSON ELECTRIC CO. COM 291011104 8,939 160,000 SH SOLE 160,000 EXPRESS SCRIPTS HOLDING CO. COM 30219G108 14,701 255,000 SH SOLE 255,000 EXXON MOBIL CORP. COM 30231G102 9,462 105,000 SH SOLE 105,000 FEDEX CORP. COM 31428X106 7,365 75,000 SH SOLE 75,000 FIFTH THIRD BANCORP COM 316773100 10,846 665,000 SH SOLE 665,000 FREEPORT-MCMORAN COPPER & GOLD COM 35671D857 5,485 165,700 SH SOLE 165,700 GENERAL ELECTRIC CO. COM 369604103 16,878 730,000 SH SOLE 730,000 GENERAL MILLS INC. COM 370334104 11,341 230,000 SH SOLE 230,000 GILEAD SCIENCES INC. COM 375558103 20,257 414,000 SH SOLE 414,000 GOOGLE INC. CL A 38259P508 14,293 18,000 SH SOLE 18,000 HALLIBURTON CO. COM 406216101 6,061 150,000 SH SOLE 150,000 HCP, INC. COM 40414L109 6,233 125,000 SH SOLE 125,000 HOLOGIC, INC. COM 436440101 9,492 420,000 SH SOLE 420,000 HONEYWELL INT'L INC. COM 438516106 22,228 295,000 SH SOLE 295,000 IDACORP, INC. COM 451107106 6,516 135,000 SH SOLE 135,000 INTEL CORP. COM 458140100 12,455 570,000 SH SOLE 570,000 INTERNATIONAL BUSINESS MACHINES COM 459200101 22,397 105,000 SH SOLE 105,000 JPMORGAN CHASE & CO. COM 46625H100 28,476 600,000 SH SOLE 600,000 KINDER MORGAN INC. COM 49456B101 6,576 170,000 SH SOLE 170,000 LOWE'S COMPANIES, INC. COM 548661107 20,856 550,000 SH SOLE 550,000 LYONDELLBASELL INDUSTRIES N.V. SHS-A N53745100 10,000 158,000 SH SOLE 158,000 MARRIOTT INTERNATIONAL INC. CL A 571903202 12,669 300,000 SH SOLE 300,000 MASCO CORP. COM 574599106 7,391 365,000 SH SOLE 365,000 MASTERCARD, INC. COM 57636Q104 12,446 23,000 SH SOLE 23,000 MCDONALD'S CORP. COM 580135101 17,944 180,000 SH SOLE 180,000 MCKESSON CORP. COM 58155Q103 12,523 116,000 SH SOLE 116,000 MEDNAX, INC. COM 58502B106 6,274 70,000 SH SOLE 70,000 MEDTRONIC, INC. COM 585055106 3,052 65,000 SH SOLE 65,000 MERCK & CO. INC COM 589331107 22,115 500,000 SH SOLE 500,000 METLIFE INC. COM 59156R108 16,539 435,000 SH SOLE 435,000 MICROSOFT CORP. COM 594918104 20,027 700,000 SH SOLE 700,000 NATIONAL OILWELL VARCO, INC. COM 637071101 7,075 100,000 SH SOLE 100,000 NEWELL RUBBERMAID INC. COM 651229106 10,440 400,000 SH SOLE 400,000 NISOURCE INC. COM 65473P105 6,161 210,000 SH SOLE 210,000 ORACLE CORP. COM 68389X105 16,170 500,000 SH SOLE 500,000 PANERA BREAD CO. CL A 69840W108 2,479 15,000 SH SOLE 15,000 PEABODY ENERGY CORP. COM 704549104 816 38,560 SH SOLE 38,560 PEPSICO, INC. COM 713448108 19,777 250,000 SH SOLE 250,000 PETROLEUM & RESOURCES CORP. COM 716549100 56,812 2,186,774 SH SOLE 2,186,774 PFIZER INC. COM 717081103 19,913 690,000 SH SOLE 690,000 PHILIP MORRIS INTERNATIONAL INC. COM 718172109 14,834 160,000 SH SOLE 160,000 PHILLIPS 66 COM 718546104 9,016 128,850 SH SOLE 128,850 PNC FINANCIAL SERVICES GROUP COM 693475105 9,975 150,000 SH SOLE 150,000 POTASH CORP OF SASKATCHEWAN INC. COM 73755L107 5,106 130,100 SH SOLE 130,100 PRAXAIR, INC. COM 74005P104 7,529 67,500 SH SOLE 67,500 PROCTER & GAMBLE CO. COM 742718109 13,486 175,000 SH SOLE 175,000 QUALCOMM INC. COM 747525103 26,780 400,000 SH SOLE 400,000 RYLAND GROUP INC. COM 783764103 13,880 333,500 SH SOLE 333,500 SAFEWAY INC. COM NEW 786514208 8,959 340,000 SH SOLE 340,000 SCHLUMBERGER LTD COM 806857108 8,987 120,000 SH SOLE 120,000 SEADRILL LTD. SHS G7945E105 1,488 40,000 SH SOLE 40,000 SENOMYX, INC. COM 81724Q107 2,308 1,093,700 SH SOLE 1,093,700 SOUTH JERSEY INDUSTRIES, INC. COM 838518108 5,559 100,000 SH SOLE 100,000 SPECTRA ENERGY CORP. COM 847560109 1,700 55,280 SH SOLE 55,280 T. ROWE PRICE GROUP INC. COM 74144T108 7,487 100,000 SH SOLE 100,000 TARGET CORP. COM 87612E106 8,214 120,000 SH SOLE 120,000 TEREX CORP. COM 880779103 9,121 265,000 SH SOLE 265,000 TEVA PHARMACEUTICAL INDUSTRIES ADR 881624209 8,730 220,000 SH SOLE 220,000 UNILEVER PLC ADR SPON ADR NEW 904767704 13,728 325,000 SH SOLE 325,000 UNITED TECHNOLOGIES CORP. COM 913017109 17,238 184,500 SH SOLE 184,500 UNITEDHEALTH GROUP INC. COM 91324P102 16,448 287,500 SH SOLE 287,500 US BANCORP COM NEW 902973304 15,947 470,000 SH SOLE 470,000 VERIZON COMMUNICATIONS INC. COM 92343V104 14,745 300,000 SH SOLE 300,000 WALT DISNEY CO. COM 254687106 20,448 360,000 SH SOLE 360,000 WELLCARE HEALTH PLANS, INC. COM 94946T106 5,796 100,000 SH SOLE 100,000 WELLS FARGO & CO. COM 949746101 20,714 560,000 SH SOLE 560,000 WISCONSIN ENERGY CORP. COM 976657106 6,862 160,000 SH SOLE 160,000 ZIMMER HOLDINGS, INC. COM 98956P102 8,650 115,000 SH SOLE 115,000 1,252,345