The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
AT&T INC Common 00206R102 108,372 2,766,700 SH   SOLE   2,766,700 0 0
ABBVIE INC Common 00287Y109 26,231 295,200 SH   SOLE   295,200 0 0
ALLETE INC Common 018522300 16,007 207,100 SH   SOLE   207,100 0 0
ALLIANT ENERGY CORP Common 018802108 13,469 324,000 SH   SOLE   324,000 0 0
ALTRIA GROUP INC Common 02209S103 28,983 457,000 SH   SOLE   457,000 0 0
AMEREN CORP Common 023608102 22,178 383,442 SH   SOLE   383,442 0 0
AMERICAN ELECTRIC POWER CO INC Common 025537101 11,927 169,800 SH   SOLE   169,800 0 0
ARCHER DANIELS MIDLAND CO Common 039483102 18,364 432,000 SH   SOLE   432,000 0 0
ASTRAZENECA PLC Common 046353108 32,220 951,000 SH   SOLE   951,000 0 0
AVISTA CORP Common 05379B107 13,326 257,400 SH   SOLE   257,400 0 0
BP PLC ADR Common 055622104 66,568 1,732,200 SH   SOLE   1,732,200 0 0
BOEING CO Common 097023105 53,893 212,000 SH   SOLE   212,000 0 0
BRIGHTHOUSE FINANCIAL INC Common 10922N103 3,219 52,938 SH   SOLE   52,938 0 0
BRISTOL MYERS SQUIBB CO Common 110122108 13,385 210,000 SH   SOLE   210,000 0 0
CF INDUSTRIES HOLDINGS INC Common 125269100 19,619 558,000 SH   SOLE   558,000 0 0
CATERPILLAR INC Common 149123101 69,725 559,100 SH   SOLE   559,100 0 0
CENTERPOINT ENERGY INC Common 15189T107 31,868 1,091,000 SH   SOLE   1,091,000 0 0
CHEVRON CORP Common 166764100 83,590 711,400 SH   SOLE   711,400 0 0
CINCINNATI FINANCIAL CORP Common 172062101 44,388 579,700 SH   SOLE   579,700 0 0
CISCO SYSTEMS Common 17275R102 52,281 1,554,600 SH   SOLE   1,554,600 0 0
COCA COLA CO Common 191216100 57,109 1,268,800 SH   SOLE   1,268,800 0 0
CONSOLIDATED EDISON INC Common 209115104 43,994 545,286 SH   SOLE   545,286 0 0
CUMMINS INC Common 231021106 32,514 193,500 SH   SOLE   193,500 0 0
DEERE & CO Common 244199105 49,487 394,040 SH   SOLE   394,040 0 0
DOMINION RESOURCES INC Common 25746U109 28,549 371,100 SH   SOLE   371,100 0 0
DONEGAL GROUP INC Common 257701201 7,696 477,100 SH   SOLE   477,100 0 0
DOWDUPONT INC Common 26078J100 72,581 1,048,400 SH   SOLE   1,048,400 0 0
DUKE ENERGY CORP Common 26441C204 35,875 427,495 SH   SOLE   427,495 0 0
EATON VANCE CORP Common 278265103 15,848 321,000 SH   SOLE   321,000 0 0
EMERSON ELECTRIC CO Common 291011104 44,334 705,500 SH   SOLE   705,500 0 0
ENTERGY CORP Common 29364G103 14,279 187,000 SH   SOLE   187,000 0 0
ERIE INDEMNITY CO CL A Common 29530P102 26,839 222,600 SH   SOLE   222,600 0 0
EXXON MOBIL CORP Common 30231G102 56,812 693,000 SH   SOLE   693,000 0 0
FLOWERS FOODS INC Common 343498101 22,760 1,210,000 SH   SOLE   1,210,000 0 0
GALLAGHER ARTHUR J Common 363576109 52,268 849,200 SH   SOLE   849,200 0 0
GENERAL ELECTRIC CO Common 369604103 46,716 1,932,000 SH   SOLE   1,932,000 0 0
GENERAL MILLS INC Common 370334104 26,744 516,700 SH   SOLE   516,700 0 0
GENUINE PARTS CO Common 372460105 21,808 228,000 SH   SOLE   228,000 0 0
GLAXOSMITHKLINE ADR Common 37733W105 51,176 1,260,500 SH   SOLE   1,260,500 0 0
GRAINGER WW INC Common 384802104 26,963 150,000 SH   SOLE   150,000 0 0
GREAT PLAINS ENERGY INC Common 391164100 18,180 600,000 SH   SOLE   600,000 0 0
HELMERICH & PAYNE INC Common 423452101 29,572 567,500 SH   SOLE   567,500 0 0
HOLLYFRONTIER CORP Common 436106108 14,784 411,000 SH   SOLE   411,000 0 0
INTEL CORP Common 458140100 46,115 1,211,000 SH   SOLE   1,211,000 0 0
IBM CORP Common 459200101 60,934 420,000 SH   SOLE   420,000 0 0
JOHNSON & JOHNSON Common 478160104 36,637 281,800 SH   SOLE   281,800 0 0
KELLOGG CO Common 487836108 22,079 354,000 SH   SOLE   354,000 0 0
KIMBERLY CLARK CORP Common 494368103 33,268 282,700 SH   SOLE   282,700 0 0
LEGGETT & PLATT INC Common 524660107 27,755 581,500 SH   SOLE   581,500 0 0
LILLY ELI & CO Common 532457108 15,098 176,500 SH   SOLE   176,500 0 0
MDU RESOURCES GROUP INC Common 552690109 33,735 1,300,000 SH   SOLE   1,300,000 0 0
MARATHON PETROLEUM GROUP Common 56585A102 15,927 284,000 SH   SOLE   284,000 0 0
MCDONALDS CORP Common 580135101 40,486 258,400 SH   SOLE   258,400 0 0
MERCK & CO INC Common 58933Y105 28,910 451,500 SH   SOLE   451,500 0 0
MERCURY GENERAL CORP Common 589400100 48,793 860,700 SH   SOLE   860,700 0 0
METLIFE INC Common 59156R108 24,229 466,400 SH   SOLE   466,400 0 0
NORFOLK SOUTHERN CO Common 655844108 25,020 189,200 SH   SOLE   189,200 0 0
NORTHWEST NATURAL GAS CO Common 667655104 16,957 263,300 SH   SOLE   263,300 0 0
NUCOR CORP Common 670346105 49,287 879,500 SH   SOLE   879,500 0 0
OGE ENERGY CORP Common 670837103 10,377 288,000 SH   SOLE   288,000 0 0
PPL CORP Common 69351T106 32,030 844,000 SH   SOLE   844,000 0 0
PAYCHEX INC Common 704326107 19,595 326,800 SH   SOLE   326,800 0 0
PEPSICO INC Common 713448108 33,563 301,200 SH   SOLE   301,200 0 0
PFIZER INC Common 717081103 53,229 1,491,000 SH   SOLE   1,491,000 0 0
PHILIP MORRIS INTERNATIONAL INC Common 718172109 60,412 544,200 SH   SOLE   544,200 0 0
PHILLIPS 66 Common 718546104 35,911 392,000 SH   SOLE   392,000 0 0
T ROWE PRICE GROUP INC Common 74144T108 26,769 295,300 SH   SOLE   295,300 0 0
PRINCIPAL FINANCIAL GROUP Common 74251V102 29,082 452,000 SH   SOLE   452,000 0 0
PROCTER & GAMBLE CO Common 742718109 51,322 564,100 SH   SOLE   564,100 0 0
PUBLIC SERVICE ENTERPRISE GRP INC Common 744573106 27,958 604,500 SH   SOLE   604,500 0 0
QUALCOMM INC Common 747525103 40,902 789,000 SH   SOLE   789,000 0 0
ROYAL DUTCH SHELL ADR Common 780259107 72,659 1,161,800 SH   SOLE   1,161,800 0 0
SCANA CORP Common 80589M102 15,992 329,800 SH   SOLE   329,800 0 0
SONOCO PRODUCTS Common 835495102 17,748 351,800 SH   SOLE   351,800 0 0
SOUTH JERSEY INDUSTRIES INC Common 838518108 16,747 485,000 SH   SOLE   485,000 0 0
SOUTHERN COMPANY Common 842587107 28,280 575,500 SH   SOLE   575,500 0 0
SPIRE INC Common 84857L101 11,944 160,000 SH   SOLE   160,000 0 0
SYSCO CORP Common 871829107 33,848 627,400 SH   SOLE   627,400 0 0
TEXAS INSTRUMENTS INC Common 882508104 16,135 180,000 SH   SOLE   180,000 0 0
3M CO Common 88579Y101 25,986 123,800 SH   SOLE   123,800 0 0
UNION PACIFIC CORP Common 907818108 19,135 165,000 SH   SOLE   165,000 0 0
UNITED PARCEL SERVICES INC Common 911312106 26,144 217,700 SH   SOLE   217,700 0 0
VF CORP Common 918204108 11,347 178,500 SH   SOLE   178,500 0 0
VALERO ENERGY CORP Common 91913Y100 13,347 173,500 SH   SOLE   173,500 0 0
VECTREN CORP Common 92240G101 11,776 179,044 SH   SOLE   179,044 0 0
VERIZON COMMUNICATIONS INC Common 92343V104 99,297 2,006,400 SH   SOLE   2,006,400 0 0
WGL HOLDINGS INC Common 92924F106 15,232 180,900 SH   SOLE   180,900 0 0
WEC ENERGY GROUP INC Common 92939U106 19,660 313,151 SH   SOLE   313,151 0 0
WASTE MANAGEMENT INC Common 94106L109 24,765 316,400 SH   SOLE   316,400 0 0
WESTAR ENERGY INC Common 95709T100 16,368 330,000 SH   SOLE   330,000 0 0
XCEL ENERGY CORP Common 98389B100 25,600 541,000 SH   SOLE   541,000 0 0
EATON CORP Common G29183103 29,027 378,000 SH   SOLE   378,000 0 0