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
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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
Agilent Technologies, Inc. COM 00846U101 18,575 242,400 SH   SOLE   242,400 0 0
Apple Inc. COM 037833100 65,466 292,300 SH   SOLE   292,300 0 0
Abbott Laboratories COM 002824100 30,540 365,000 SH   SOLE   365,000 0 0
Accenture plc Class A COM G1151C101 25,256 131,300 SH   SOLE   131,300 0 0
Adobe Inc. COM 00724F101 30,415 110,100 SH   SOLE   110,100 0 0
Ameren Corporation COM 023608102 13,985 174,700 SH   SOLE   174,700 0 0
American Tower Corporation COM 03027X100 17,160 77,600 SH   SOLE   77,600 0 0
Amazon.com, Inc. COM 023135106 71,693 41,300 SH   SOLE   41,300 0 0
Air Products and Chemicals, Inc. COM 009158106 11,160 50,300 SH   SOLE   50,300 0 0
AvalonBay Communities, Inc. COM 053484101 15,138 70,300 SH   SOLE   70,300 0 0
Broadcom Inc. COM 11135F101 17,889 64,800 SH   SOLE   64,800 0 0
American Express Company COM 025816109 28,210 238,500 SH   SOLE   238,500 0 0
Boeing Company COM 097023105 14,686 38,600 SH   SOLE   38,600 0 0
Bank of America Corp. COM 060505104 43,242 1,482,400 SH   SOLE   1,482,400 0 0
Ball Corporation COM 058498106 7,499 103,000 SH   SOLE   103,000 0 0
BP p.l.c. Sponsored ADR COM 055622104 3,070 80,800 SH   SOLE   80,800 0 0
Berkshire Hathaway Inc. Class B COM 084670702 12,668 60,900 SH   SOLE   60,900 0 0
Celanese Corporation COM 150870103 8,206 67,100 SH   SOLE   67,100 0 0
Comcast Corporation Class A COM 20030N101 30,123 668,200 SH   SOLE   668,200 0 0
Chipotle Mexican Grill, Inc. COM 169656105 18,154 21,600 SH   SOLE   21,600 0 0
Costco Wholesale Corporation COM 22160K105 18,324 63,600 SH   SOLE   63,600 0 0
salesforce.com, inc. COM 79466L302 20,752 139,800 SH   SOLE   139,800 0 0
Cisco Systems, Inc. COM 17275R102 21,172 428,500 SH   SOLE   428,500 0 0
Cintas Corporation COM 172908105 8,311 31,000 SH   SOLE   31,000 0 0
Chevron Corporation COM 166764100 8,871 74,800 SH   SOLE   74,800 0 0
Delta Air Lines, Inc. COM 247361702 12,453 216,200 SH   SOLE   216,200 0 0
DuPont de Nemours, Inc. COM 26614N102 4,093 57,400 SH   SOLE   57,400 0 0
Dollar General Corporation COM 256677105 16,424 103,337 SH   SOLE   103,337 0 0
Walt Disney Company COM 254687106 18,258 140,100 SH   SOLE   140,100 0 0
EOG Resources, Inc. COM 26875P101 6,472 87,200 SH   SOLE   87,200 0 0
Edwards Lifesciences Corporation COM 28176E108 27,027 122,900 SH   SOLE   122,900 0 0
Diamondback Energy, Inc. COM 25278X109 6,671 74,200 SH   SOLE   74,200 0 0
Facebook, Inc. Class A COM 30303M102 16,223 91,100 SH   SOLE   91,100 0 0
FirstEnergy Corp. COM 337932107 13,620 282,400 SH   SOLE   282,400 0 0
Fidelity National Information Services, Inc. COM 31620M106 20,206 152,200 SH   SOLE   152,200 0 0
Fifth Third Bancorp COM 316773100 16,595 606,100 SH   SOLE   606,100 0 0
General Electric Company COM 369604103 1,373 153,622 SH   SOLE   153,622 0 0
Alphabet Inc. Class C COM 02079K107 13,649 11,197 SH   SOLE   11,197 0 0
Alphabet Inc. Class A COM 02079K305 33,459 27,400 SH   SOLE   27,400 0 0
Honeywell International Inc. COM 438516106 34,348 203,000 SH   SOLE   203,000 0 0
Intercontinental Exchange, Inc. COM 45866F104 20,918 226,700 SH   SOLE   226,700 0 0
Johnson & Johnson COM 478160104 39,435 304,800 SH   SOLE   304,800 0 0
JPMorgan Chase & Co. COM 46625H100 39,838 338,500 SH   SOLE   338,500 0 0
Coca-Cola Company COM 191216100 29,027 533,200 SH   SOLE   533,200 0 0
Kansas City Southern COM 485170302 14,551 109,400 SH   SOLE   109,400 0 0
Cheniere Energy, Inc. COM 16411R208 8,469 134,300 SH   SOLE   134,300 0 0
Lowe's Companies, Inc. COM 548661107 16,802 152,800 SH   SOLE   152,800 0 0
Lam Research Corporation COM 512807108 12,734 55,100 SH   SOLE   55,100 0 0
Mastercard Incorporated Class A COM 57636Q104 37,775 139,100 SH   SOLE   139,100 0 0
Marriott International, Inc. Class A COM 571903202 15,061 121,100 SH   SOLE   121,100 0 0
Masco Corporation COM 574599106 14,117 338,700 SH   SOLE   338,700 0 0
Mondelez International, Inc. Class A COM 609207105 17,365 313,900 SH   SOLE   313,900 0 0
Medtronic plc COM G5960L103 24,190 222,700 SH   SOLE   222,700 0 0
MetLife, Inc. COM 59156R108 24,646 522,600 SH   SOLE   522,600 0 0
Merck & Co., Inc. COM 58933Y105 34,404 408,700 SH   SOLE   408,700 0 0
Microsoft Corporation COM 594918104 104,940 754,800 SH   SOLE   754,800 0 0
NextEra Energy, Inc. COM 65339F101 21,039 90,300 SH   SOLE   90,300 0 0
Netflix, Inc. COM 64110L106 4,014 15,000 SH   SOLE   15,000 0 0
NIKE, Inc. Class B COM 654106103 22,353 238,000 SH   SOLE   238,000 0 0
Oracle Corporation COM 68389X105 6,725 122,200 SH   SOLE   122,200 0 0
Palo Alto Networks, Inc. COM 697435105 14,554 71,400 SH   SOLE   71,400 0 0
Adams Natural Resources Fund, Inc. COM 00548F105 34,617 2,186,774 SH   SOLE   2,186,774 0 0
PepsiCo, Inc. COM 713448108 16,274 118,700 SH   SOLE   118,700 0 0
Pfizer Inc. COM 717081103 7,615 211,940 SH   SOLE   211,940 0 0
Procter & Gamble Company COM 742718109 14,347 115,350 SH   SOLE   115,350 0 0
Prologis, Inc. COM 74340W103 18,714 219,600 SH   SOLE   219,600 0 0
Philip Morris International Inc. COM 718172109 14,958 197,000 SH   SOLE   197,000 0 0
Republic Services, Inc. COM 760759100 19,318 223,200 SH   SOLE   223,200 0 0
Sherwin-Williams Company COM 824348106 11,822 21,500 SH   SOLE   21,500 0 0
SPDR S&P 500 ETF Trust COM 78462F103 8,488 28,600 SH   SOLE   28,600 0 0
AT&T Inc. COM 00206R102 32,288 853,282 SH   SOLE   853,282 0 0
Thermo Fisher Scientific Inc. COM 883556102 27,321 93,800 SH   SOLE   93,800 0 0
Total S.A. Sponsored ADR COM 89151E109 3,162 60,800 SH   SOLE   60,800 0 0
T. Rowe Price Group COM 74144T108 19,126 167,400 SH   SOLE   167,400 0 0
Travelers Companies, Inc. COM 89417E109 19,984 134,400 SH   SOLE   134,400 0 0
Tractor Supply Company COM 892356106 14,380 159,000 SH   SOLE   159,000 0 0
Texas Instruments Incorporated COM 882508104 21,208 164,100 SH   SOLE   164,100 0 0
Unilever plc Sponsored ADR COM 904767704 11,623 193,400 SH   SOLE   193,400 0 0
UnitedHealth Group Incorporated COM 91324P102 19,711 90,700 SH   SOLE   90,700 0 0
Union Pacific Corporation COM 907818108 24,022 148,300 SH   SOLE   148,300 0 0
United Rentals, Inc. COM 911363109 8,501 68,200 SH   SOLE   68,200 0 0
U.S. Bancorp COM 902973304 26,729 483,000 SH   SOLE   483,000 0 0
Visa Inc. Class A COM 92826C839 51,844 301,400 SH   SOLE   301,400 0 0
Valero Energy Corporation COM 91913Y100 9,538 111,900 SH   SOLE   111,900 0 0
Verizon Communications Inc. COM 92343V104 5,239 86,800 SH   SOLE   86,800 0 0
WEC Energy Group Inc. COM 92939U106 14,845 156,100 SH   SOLE   156,100 0 0
Wells Fargo & Company COM 949746101 2,789 55,300 SH   SOLE   55,300 0 0
Walmart Inc. COM 931142103 22,359 188,400 SH   SOLE   188,400 0 0
Industrial Select Sector SPDR Fund COM 81369Y704 24,174 311,400 SH   SOLE   311,400 0 0
Health Care Select Sector SPDR Fund COM 81369Y209 6,525 72,400 SH   SOLE   72,400 0 0
Consumer Discretionary Select Sector SPDR Fund COM 81369Y407 10,332 85,600 SH   SOLE   85,600 0 0
Exxon Mobil Corporation COM 30231G102 13,324 188,700 SH   SOLE   188,700 0 0
Zoetis Inc. Class A COM 98978V103 17,393 139,600 SH   SOLE   139,600 0 0