SEPTEMBER 30, 2021

Letter to Shareholders
Dear Fellow Shareholders,
Broadly positive data continued to support the robust, ongoing economic recovery in the third quarter. However, the market was challenged by persistent supply chain disruptions, signs that surging inflation appears less transitory than many believed, and uncertainty surrounding the fate of major U.S. infrastructure spending bills. The Federal Reserve added to the mix, signaling it could start to taper its $120 billion monthly asset buying program as soon as its November meeting.
The market’s performance showed increasing levels of concern about the impact of those headwinds on the recovery. The “reopening” trade, which drove strong equity returns in the first half of the year as investors
Energy was the best performing sector in the S&P 500 in the first nine months of 2021, outperforming by more than 27%.
pivoted from high-multiple technology names toward more cyclical companies, lost momentum during the quarter, especially in September. The S&P 500 declined 4.7% for the month. The market did, however, produce its sixth consecutive quarterly gain, finishing with a 0.6% advance. For the first nine months of 2021, the S&P 500 rose 15.9%.
The biggest questions relate to how long these issues will last. We believe inflationary pressures will be transitory, but we share the Federal Reserve’s uncertainty about how quickly they will ease. Likewise, we view the September downturn as more about investors taking some profits than a long-lasting crisis of confidence. Consumers appeared to pull back on spending as the Delta variant of COVID-19 spread during the summer, but they remain flush with record savings levels as the pandemic continues to wind down.
Energy was the best performing sector in the S&P 500 in the first nine months, outperforming the index by 27.3%. Our Fund rose 33.8%, outperforming its benchmark. WTI oil closed the third quarter near three-year highs, above $75 a barrel, up approximately 55% year-to-date and more than 100% in 12 months. Gas, coal, and power prices also rose sharply, driving inflationary pressures across the globe. Rising demand since the initial shock of the pandemic combined with supply disruptions to drive oil and other energy prices higher. Many analysts expect prices to rise further in the coming months. Within the sector, all industry groups advanced sharply year-to-date.
That said, the sector’s first-half rally slowed during the third quarter. Our Fund posted a modest decline of  -1.8% but outperformed its benchmark. Our holdings

Letter to Shareholders (continued)
in the Exploration and Production (E&P) and Refining groups added the most relative value, while our Materials holdings lagged those in the benchmark.
Performance in the E&P group was led by our overweight position in ConocoPhillips. Conoco was an early adopter of the strategy to focus on returning excess cash flow to shareholders while keeping production levels stable. Late in the quarter, the company announced they were acquiring the Permian Basin assets of Royal Dutch. Importantly, the company is paying for the acquisition without adding debt to their balance sheet and intends to sell other assets so that average production costs will decline. We also moved to an overweight position in EOG Resources. We believe EOG is a best-in-class operator whose valuation is attractive.
While Refining declined during the third quarter as fears that the Delta variant of COVID-19 would lower demand for gasoline and other refined products, stock selection within the group added value. Our overweight position in Marathon Petroleum, which strongly outperformed its peer group, was a key relative contributor. Marathon completed their spin-off of the Speedway gas station network, and we believe the resulting cash infusion will enable the company to buy back a significant percentage of their stock over the next couple of years.
Investments in the Chemicals group within Materials adversely impacted the Fund’s relative performance. This was primarily due to our position in Air Products and Chemicals. The company is engaged in two large joint ventures in the Middle East that have run into cost issues and timing delays. We believe these projects will ultimately prove to be beneficial to the company and expect resolution of the issues in the coming months. The weakness in Air Products was partially offset by strength in Sherwin Williams. The company continues to see strong demand for their coating products from all their major customer bases.
For the nine months ended September 30, 2021, the total return on the Fund’s net asset value (“NAV”) per share (with dividends and capital gains reinvested) was 33.8%. This compares to a total return of 33.4% for the Fund’s benchmark, comprised of the S&P 500 Energy Sector (70% weight) and the S&P 500 Materials Sector (30% weight). The total return on the market price of the Fund’s shares for the period was 40.8%.
For the twelve months ended September 30, 2021, the Fund’s total return on NAV was 64.8%. Comparable return for the Fund’s benchmark was 64.5%. The Fund’s total return on market price for the period was 69.6%.
During the first three quarters of this year, the Fund paid distributions to shareholders in the amount of $7.2 million, or $.30 per share, consisting of  $.03 net investment income and $.03 long-term capital gain, realized in 2020, and $.24

Letter to Shareholders (continued)
of net investment income realized in 2021, all taxable in 2021. These constitute the first three payments toward our annual 6% minimum distribution rate commitment.
Looking ahead, we remain positive on the market, despite our belief that supply chain disruptions and inflationary pressures seem likely to linger into 2022. Those issues, along with the unpredictability of COVID-19 threats, remain risk factors, as do the market’s above-average valuations and investor sensitivity to the Fed’s moves and statements. We could well see more short-term volatility in equity markets, especially as investors anxiously watch the U.S. stimulus bills. Still, the economic recovery from the pandemic continues, supported by record-high savings levels and the likely continuance of fiscal and monetary stimulus. The potential for short-term ups and downs only reinforces the importance of stock selection, and we believe our focus on that, along with our disciplined investment approach, will carry us through. As always, we appreciate the trust you place in us.
By order of the Board of Directors,
Mark E. Stoeckle
Chief Executive Officer
October 21, 2021
This report contains “forward-looking statements” within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934. By their nature, all forward-looking statements involve risks and uncertainties, and actual results could differ materially from those contemplated by the forward-looking statements. Several factors that could materially affect the Fund’s actual results are the performance of the portfolio of stocks held by the Fund, the conditions in the U.S. and international financial markets, the price at which shares of the Fund will trade in the public markets, and other factors discussed in the Fund’s periodic filings with the Securities and Exchange Commission.
This report is transmitted to the shareholders of the Fund for their information. It is not a prospectus, circular or representation intended for use in the purchase or sale of shares of the Fund or of any securities mentioned in the report. The rates of return will vary and the principal value of an investment will fluctuate. Shares, if sold, may be worth more or less than their original cost. Past performance is no guarantee of future investment results.

Summary Financial Information
At September 30:
Net asset value per share $ 18.05 $ 11.58
Market price per share $ 15.69 $ 9.78
Shares outstanding 24,084,964 23,822,808
Total net assets $ 434,783,848 $ 275,792,627
Average net assets $ 403,729,827 $ 398,753,189
Unrealized appreciation on investments $ (7,143,672) $ (170,609,235)
For the nine months ended September 30:
Net investment income $ 9,213,888 $ 9,955,527
Net realized gain (loss) $ 4,909,580 $ 8,290,529
Cost of shares repurchased* $ 478,299 $ 71,906,399
Shares repurchased* 37,000 6,053,018
Total return (based on market price) 40.8% -39.1%
Total return (based on net asset value) 33.8% -36.8%
Key ratios:
Expenses to average net assets** 0.91% 1.33%
Net investment income to average net assets** 3.05% 3.36%
Portfolio turnover** 24.4% 33.3%
Net cash & short-term investments to net assets 0.7% 0.5%
For 2020, includes 5,955,676 shares at a cost of  $71,170,328 purchased in a tender offer.
Ten Largest Equity Portfolio Holdings
September 30, 2021
Market Value
of Net Assets
Exxon Mobil Corporation $ 74,914,917 17.2%
Chevron Corporation 56,932,827 13.1
ConocoPhillips 32,714,341 7.5
EOG Resources, Inc. 18,389,857 4.2
Linde plc 17,456,110 4.0
Schlumberger N.V. 16,776,240 3.9
Marathon Petroleum Corporation 16,564,153 3.8
Valero Energy Corporation 12,018,071 2.8
ONEOK, Inc. 10,791,939 2.5
Sherwin-Williams Company 10,461,902 2.4
$ 267,020,357 61.4%

Schedule of Investments
September 30, 2021
Value (a)
Common Stocks — 99.3%
Energy — 74.7%
Equipment & Services — 5.7%
Baker Hughes Company
171,900 $ 4,251,087
Halliburton Company
170,270 3,681,237
Schlumberger N.V.
566,000 16,776,240
Exploration & Production — 23.4%
APA Corporation
59,700 1,279,371
Cabot Oil & Gas Corporation
102,300 2,226,048
Canadian Natural Resources Limited
47,800 1,746,612
482,726 32,714,341
Devon Energy Corporation
270,300 9,598,353
Diamondback Energy, Inc.
105,800 10,016,086
EOG Resources, Inc.
229,100 18,389,857
Hess Corporation
85,600 6,686,216
Marathon Oil Corporation
401,500 5,488,505
Occidental Petroleum Corporation
161,051 4,763,889
Pioneer Natural Resources Company
52,700 8,775,077
Whiting Petroleum Corporation (b)
476 27,803
Whiting Petroleum Corporation warrants,
strike price $73.44, expires 9/1/24 (b)
2,654 18,976
Whiting Petroleum Corporation warrants,
strike price $83.45, expires 9/1/25 (b)
1,327 9,581
Integrated Oil & Gas — 30.8%
Cenovus Energy Inc.
196,700 1,978,802
Chevron Corporation
561,191 56,932,827
Exxon Mobil Corporation
1,273,630 74,914,917
Refining & Marketing — 8.4%
Marathon Petroleum Corporation
267,985 16,564,153
Phillips 66
112,775 7,897,633
Valero Energy Corporation
170,300 12,018,071
Storage & Transportation — 6.4%
Kinder Morgan, Inc.
464,400 7,769,412
186,100 10,791,939
Williams Companies, Inc.
362,100 9,392,874

Schedule of Investments (continued)
September 30, 2021
Value (a)
Materials — 24.6%
Chemicals — 14.9%
Air Products and Chemicals, Inc.
34,300 $ 8,784,573
Albemarle Corporation
9,000 1,970,730
Celanese Corporation
29,600 4,458,944
CF Industries Holdings, Inc.
44,300 2,472,826
Corteva Inc.
66,245 2,787,590
Dow, Inc.
65,745 3,784,282
DuPont de Nemours, Inc.
44,487 3,024,671
Eastman Chemical Company
8,900 896,586
Ecolab Inc.
31,600 6,592,392
FMC Corporation
10,500 961,380
International Flavors & Fragrances Inc.
21,006 2,808,922
Linde plc
59,500 17,456,110
LyondellBasell Industries N.V.
53,300 5,002,205
Mosaic Company
21,001 750,156
PPG Industries, Inc.
19,700 2,817,297
Construction Materials — 3.1%
Martin Marietta Materials, Inc.
4,500 1,537,560
Sherwin-Williams Company
37,400 10,461,902
Vulcan Materials Company
9,800 1,657,768
Containers & Packaging — 2.8%
Amcor plc
125,100 1,449,909
Avery Dennison Corporation
5,500 1,139,655
Ball Corporation
29,100 2,618,127
International Paper Company
28,200 1,576,944
Packaging Corporation of America
7,600 1,044,544
Sealed Air Corporation
59,200 3,243,568
WestRock Company
22,200 1,106,226
Metals & Mining — 3.8%
Freeport-McMoRan, Inc.
225,300 7,329,009
Newmont Corporation
94,700 5,142,210
Nucor Corporation
21,100 2,078,139
Steel Dynamics, Inc.
36,000 2,105,280

Schedule of Investments (continued)
September 30, 2021
Value (a)
Total Common Stocks
(Cost $438,913,084)
$ 431,769,412
Short-Term Investments — 0.8%
Money Market Funds — 0.8%
Northern Institutional Treasury Portfolio, 0.01% (c)
3,555,412 3,555,412
(Cost $3,555,412)
Total — 100.1% of Net Assets
(Cost $442,468,496)
Other Assets Less Liabilities — (0.1)% (540,976 )
Net Assets — 100.0%
Common stocks and warrants are listed on the New York Stock Exchange or NASDAQ and are valued at the last reported sale price on the day of valuation.
Presently non-dividend paying.
Rate presented is as of period-end and represents the annualized yield earned over the previous seven days.
Information regarding transactions in equity securities during the quarter can be found on our website at: www.adamsfunds.com.

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Adams Natural Resources Fund, Inc.
Board of Directors
Enrique R. Arzac (2)(4) Roger W. Gale (2) (3)
Kathleen T. McGahran(1)(5)
Kenneth J. Dale(1)(2) (3) Mary Chris Jammet (2) (4)
Mark E. Stoeckle (1)
Frederic A. Escherich (1) (3) (4)
Lauriann C. Kloppenburg(1)(3) (4)
Member of Executive Committee
Member of Audit Committee
Member of Compensation Committee
Member of Nominating and Governance Committee
Chair of the Board
Mark E. Stoeckle
Chief Executive Officer
James P. Haynie, CFA
Brian S. Hook, CFA, CPA
Vice President, Chief Financial Officer and Treasurer
Janis F. Kerns
Vice President, General Counsel, Secretary and Chief Compliance Officer
Gregory W. Buckley
Vice President—Research
Michael A. Kijesky, CFA
Vice President—Research
Michael E. Rega, CFA
Vice President—Research
Jeffrey R. Schollaert, CFA
Vice President—Research
Christine M. Sloan, CPA
Assistant Treasurer and Director of Human Resources
500 East Pratt Street, Suite 1300, Baltimore, MD 21202
410.752.5900   800.638.2479
Website: www.adamsfunds.com
Email: investorrelations@adamsfunds.com
Independent Registered Public Accounting Firm: PricewaterhouseCoopers LLP
Custodian of Securities: The Northern Trust Company
Transfer Agent & Registrar: American Stock Transfer & Trust Company, LLC
Stockholder Relations Department
6201 15th Avenue
Brooklyn, NY 11219
(866) 723-8330
Website: www.astfinancial.com
Email: info@astfinancial.com

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