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Summary Prospectus

August 28, 2023

Invesco Energy Fund

Class: A (IENAX), C (IEFCX), Y (IENYX), Investor (FSTEX), R5 (IENIX), R6 (IENSX)

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus, reports to shareholders, and other information about the Fund online at www.invesco.com/prospectus. You can also get this information at no cost by calling (800) 959-4246 or by sending an e-mail request to ProspectusRequest@invesco.com. The Fund’s prospectus and statement of additional information, both dated August 28, 2023 (as each may be amended or supplemented), are incorporated by reference into this Summary Prospectus and may be obtained, free of charge, at the website, phone number or e-mail address noted above.

Investment Objective(s)

The Fund’s investment objective is long-term growth of capital.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund.

The table and Examples below do not reflect any transaction fees that may be charged by financial intermediaries or commissions that a shareholder may be required to pay directly to its financial intermediary when buying or selling Class Y or Class R6 shares. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Invesco Funds. More information about these and other discounts is available from your financial professional and in the section “Shareholder Account Information – Initial Sales Charges (Class A Shares Only)” on page A-3 of the prospectus and the section “Purchase, Redemption and Pricing of Shares – Purchase and Redemption of Shares” on page L-1 of the statement of additional information (SAI).

Shareholder Fees (fees paid directly from your investment)

Class:	A	C	Y	Investor	R5	R6
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	5.50 %	None	None	None	None	None

Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	None1	1.00 %	None	None	None	None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Class:	A	C	Y	Investor	R5	R6
Management Fees	0.71 %	0.71 %	0.71 %	0.71 %	0.71 %	0.71 %

Distribution and/or Service (12b-1) Fees	0.25	1.00	None	0.25	None	None

Other Expenses2	0.26	0.26	0.26	0.26	0.17	0.10

Acquired Fund Fees and Expenses	0.01	0.01	0.01	0.01	0.01	0.01

Total Annual Fund Operating Expenses	1.23	1.98	0.98	1.23	0.89	0.82

A contingent deferred sales charge may apply in some cases. See “Shareholder Account Information-Contingent Deferred Sales Charges (CDSCs).”

“Other Expenses” have been restated to reflect current fees.

Example. This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. This Example does not include commissions and/or other forms of compensation that investors may pay on transactions in Class Y and Class R6 shares. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	1 Year	3 Years	5 Years	10 Years
Class A	$668	$919	$1,188	$1,957

Class C	$301	$621	$1,068	$2,113

Class Y	$100	$312	$542	$1,201

Investor Class	$125	$390	$676	$1,489

Class R5	$91	$284	$493	$1,096

Class R6	$84	$262	$455	$1,014

You would pay the following expenses if you did not redeem your shares:

	1 Year	3 Years	5 Years	10 Years
Class A	$668	$919	$1,188	$1,957

Class C	$201	$621	$1,068	$2,113

Class Y	$100	$312	$542	$1,201

Investor Class	$125	$390	$676	$1,489

Class R5	$91	$284	$493	$1,096

Class R6	$84	$262	$455	$1,014

Portfolio Turnover. The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 52% of the average value of its portfolio.

Principal Investment Strategies of the Fund

The Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in securities of issuers engaged in energy-related industries, and in derivatives and other instruments that have economic characteristics similar to such securities.

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The Fund invests primarily in equity securities. The principal type of equity security in which the Fund invests is common stock.

The Fund will concentrate its investments in the securities of issuers engaged primarily in energy-related industries. The Fund considers an issuer to be doing business in energy-related industries if it meets at least one of the following tests: (1) at least 50% of its gross income or its net sales come from activities in energy-related industries; (2) at least 50% of its total assets are devoted to producing revenues in energy-related industries; or (3) based on other available information, the Fund’s portfolio managers determine that its primary business is within energy-related industries. Such other available information may include industry classifications from any one or more third-party providers, such as the Global Industry Classification Standard (GICS®), the North American Industry Classification System (NAICS), or the Bloomberg Industry Classification System (BICS). Companies in energy-related industries include, but are not limited to, oil companies, oil and gas exploration companies, natural gas pipeline companies, refinery companies, energy conservation companies, coal companies, alternative energy companies and innovative energy technology companies. Generally, the companies in which the Fund invests fall within the three main energy sub-industries: (1) integrated oil and gas issuers; (2) oil and gas equipment and services issuers; and (3) oil and gas exploration/production issuers. Portfolio weightings among these and other sub-industries will be adjusted according to current economic conditions.

The Fund may invest up to 100% of its net assets in securities of foreign issuers doing business in energy-related industries, which may include securities of issuers located in emerging market countries, i.e., those that are generally in the early stages of their industrial cycles. The Fund may invest in securities of issuers of all capitalization sizes.

The Fund can invest in derivative instruments, including forward foreign currency contracts.

The Fund can use forward foreign currency contracts to hedge against adverse movements in the foreign currencies in which portfolio securities are denominated; though the Fund has not historically used these instruments.

The Fund is non-diversified, which means it can invest a greater percentage of its assets in a small group of issuers or any one issuer than a diversified fund can.

The investment team primarily uses a fundamental bottom-up analysis to seek to identify investments with quality management teams and quality assets trading at attractive valuations. The investment strategy places emphasis on valuation and risk/reward profiles of potential investments. In valuing companies, the investment team takes a long-term view on commodity prices and uses a constant marginal cost of production commodity price. The commodity price does not change unless a persistent structural change in the commodity occurs. Price-to-cash flow (P/CF), price-to-net asset value (P/NAV) and price-to-earnings (P/E) are the valuation metrics the investment team uses to assess the attractiveness of a security. Top-down macroeconomic research, including an assessment of factors such as worldwide economic activity, government policy, employment, inflation, supply/demand dynamics, currency market dynamics, international trade, technological advances, as well as business, equity and credit market cycle analysis, is also considered as a check and balance to sub-industry allocation that results from bottom-up analysis.

The portfolio managers will consider selling a security if, among other things, (1) a security reaches its target price; (2) a change in fundamentals occurs-either company specific or industry wide; (3) a change in corporate focus and/or management occurs; or (4) a more attractive investment opportunity is identified.

Principal Risks of Investing in the Fund

As with any mutual fund investment, loss of money is a risk of investing. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. The risks associated with an investment in the Fund

can increase during times of significant market volatility. The principal risks of investing in the Fund are:

Market Risk. The market values of the Fund’s investments, and therefore the value of the Fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of the Fund’s investments may go up or down due to general market conditions that are not specifically related to the particular issuer, such as real or perceived adverse economic conditions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability, natural or environmental disasters, widespread disease or other public health issues, war, military conflict, acts of terrorism, economic crisis or adverse investor sentiment generally. During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by the Fund will rise in value.

Investing in Stocks Risk. The value of the Fund’s portfolio may be affected by changes in the stock markets. Stock markets may experience significant short-term volatility and may fall or rise sharply at times. Adverse events in any part of the equity or fixed-income markets may have unexpected negative effects on other market segments. Different stock markets may behave differently from each other and U.S. stock markets may move in the opposite direction from one or more foreign stock markets.

The prices of individual stocks generally do not all move in the same direction at the same time. However, individual stock prices tend to go up and down more dramatically than those of certain other types of investments, such as bonds. A variety of factors can negatively affect the price of a particular company’s stock. These factors may include, but are not limited to: poor earnings reports, a loss of customers, litigation against the company, general unfavorable performance of the company’s sector or industry, or changes in government regulations affecting the company or its industry. To the extent that securities of a particular type are emphasized (for example foreign stocks, stocks of small- or mid-cap companies, growth or value stocks, or stocks of companies in a particular industry), fund share values may fluctuate more in response to events affecting the market for those types of securities.

Energy Sector Risk. Changes in worldwide energy prices, exploration and production spending, government regulation, war, world events, local and international politics, economic conditions, exchange rates, transportation and storage costs and labor relations can affect companies in the energy sector. In addition, these companies are at an increased risk of civil liability and environmental damage claims, and are also subject to the risk of loss from terrorism and natural disasters. Commodity price volatility, imposition of import controls, increased competition, depletion of resources, development of alternative energy sources, and technological developments may also impact the energy sector. Investments in the energy sector may be cyclical and/or highly volatile and subject to swift price fluctuations. Energy markets are subject to both short- and long-term trends that impact demand for and supply of energy commodities. A decrease in the production of energy commodities or a decrease in the volume of such commodities available may adversely impact the financial performance of companies operating in the energy sector. In addition, significant declines in the price of oil may contribute to significant market volatility, which may adversely affect the Fund’s performance.

Foreign Securities Risk. The Fund's foreign investments may be adversely affected by political and social instability, changes in economic or taxation policies, difficulty in enforcing obligations, decreased liquidity or increased volatility. Foreign investments also involve the risk of the possible seizure, nationalization or expropriation of the issuer or foreign deposits (in which the Fund could lose its entire investments in a certain market) and the possible adoption of foreign governmental restrictions such as exchange controls. Foreign companies generally may be subject to less stringent regulations than U.S. companies, including financial reporting requirements and auditing and accounting controls, and may therefore be more

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susceptible to fraud or corruption. There may be less public information available about foreign companies than U.S. companies, making it difficult to evaluate those foreign companies. Unless the Fund has hedged its foreign currency exposure, foreign securities risk also involves the risk of negative foreign currency rate fluctuations, which may cause the value of securities denominated in such foreign currency (or other instruments through which the Fund has exposure to foreign currencies) to decline in value. Currency exchange rates may fluctuate significantly over short periods of time. Currency hedging strategies, if used, are not always successful.

Emerging Market Securities Risk. Emerging markets (also referred to as developing markets) are generally subject to greater market volatility, political, social and economic instability, uncertain trading markets and more governmental limitations on foreign investment than more developed markets. In addition, companies operating in emerging markets may be subject to lower trading volume and greater price fluctuations than companies in more developed markets. Such countries’ economies may be more dependent on relatively few industries or investors that may be highly vulnerable to local and global changes. Companies in emerging market countries generally may be subject to less stringent regulatory, disclosure, financial reporting, accounting, auditing and recordkeeping standards than companies in more developed countries. As a result, information, including financial information, about such companies may be less available and reliable, which can impede the Fund’s ability to evaluate such companies. Securities law and the enforcement of systems of taxation in many emerging market countries may change quickly and unpredictably, and the ability to bring and enforce actions (including bankruptcy, confiscatory taxation, expropriation, nationalization of a company’s assets, restrictions on foreign ownership of local companies, restrictions on withdrawing assets from the country, protectionist measures and practices such as share blocking), or to obtain information needed to pursue or enforce such actions, may be limited. In addition, the ability of foreign entities to participate in privatization programs of certain developing or emerging market countries may be limited by local law. Investments in emerging market securities may be subject to additional transaction costs, delays in settlement procedures, unexpected market closures, and lack of timely information.

Small- and Mid-Capitalization Companies Risk. Investing in securities of small- and mid-capitalization companies involves greater risk than customarily is associated with investing in larger, more established companies. Stocks of small- and mid-capitalization companies tend to be more vulnerable to changing market conditions, may have little or no operating history or track record of success, and may have more limited product lines and markets, less experienced management and fewer financial resources than larger companies. These companies’ securities may be more volatile and less liquid than those of more established companies. They may be more sensitive to changes in a company’s earnings expectations and may experience more abrupt and erratic price movements. Smaller companies’ securities often trade in lower volumes and in many instances, are traded over-the-counter or on a regional securities exchange, where the frequency and volume of trading is substantially less than is typical for securities of larger companies traded on national securities exchanges. Therefore, the securities of smaller companies may be subject to wider price fluctuations and it might be harder for the Fund to dispose of its holdings at an acceptable price when it wants to sell them. Since small- and mid-cap companies typically reinvest a high proportion of their earnings in their business, they may not pay dividends for some time, particularly if they are newer companies. It may take a substantial period of time to realize a gain on an investment in a small- or mid-cap company, if any gain is realized at all.

Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the

use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the Fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the Fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the Fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the Fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the Fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the Fund’s ability to use certain derivatives or their cost. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions.

Non-Diversification Risk. The Fund is non-diversified and can invest a greater portion of its assets in the obligations or securities of a small number of issuers or any single issuer than a diversified fund can. A change in the value of one or a few issuers’ securities will therefore affect the value of the Fund more than if it was a diversified fund.

Management Risk. The Fund is actively managed and depends heavily on the Adviser’s judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for the Fund’s portfolio. The Fund could experience losses if these judgments prove to be incorrect. Additionally, legislative, regulatory, or tax developments may adversely affect management of the Fund and, therefore, the ability of the Fund to achieve its investment objective.

Performance Information

The bar chart and performance table provide an indication of the risks of investing in the Fund. The bar chart shows changes in the performance of the Fund from year to year as of December 31. The performance table compares the Fund's performance to that of a style-specific benchmark, a peer group benchmark comprised of funds with investment objectives and strategies similar to those of the Fund and a broad-based securities market benchmark (in that order). The Fund's past performance (before and after taxes) is not necessarily an indication of its future performance.

Fund performance reflects any applicable fee waivers and expense reimbursements. Performance returns would be lower without applicable fee waivers and expense reimbursements.

All Fund performance shown assumes the reinvestment of dividends and capital gains and the effect of the Fund’s expenses.

Updated performance information is available on the Fund's website at www.invesco.com/us.

Annual Total Returns

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Investor Class	Period Ended	Returns
Year-to-date	June 30, 2023	-6.24%
Best Quarter	March 31, 2022	35.66%
Worst Quarter	March 31, 2020	-50.68%

Average Annual Total Returns (for the periods ended December 31, 2022)

	Inception Date	1 Year	5 Years	10 Years
Investor Class
Return Before Taxes	1/19/1984	52.87 %	4.42 %	0.14 %1
Return After Taxes on Distributions		52.54	3.97	-0.52 1
Return After Taxes on Distributions and Sale of Fund Shares		31.52	3.30	0.01 1

Class A	3/28/2002	44.54	3.25	-0.42 1

Class C	2/14/2000	50.63	3.64	-0.46 1

Class Y	10/3/2008	53.23	4.67	0.39 1

Class R5	1/31/2006	53.36	4.90	0.57 1

Class R6	4/4/2017	53.51	4.93	0.42 1,2

MSCI World Energy Index (Net)(reflects reinvested dividends net of withholding taxes, but reflects no deduction for fees, expenses or other taxes)		46.01	5.63	3.48

Lipper Natural Resource Funds Index		44.18	3.97	2.05

S&P 500® Index (reflects no deduction for fees, expenses or taxes)		-18.11	9.42	12.56

Performance includes litigation proceeds. Had these not been received, total returns would have been lower.

Performance shown prior to the inception date is that of the Fund's Class A shares at net asset value and includes the 12b-1 fees applicable to that class. Although invested in the same portfolio of securities, Class R6 shares' returns of the Fund will be different from Class A shares' returns of the Fund as they have different expenses.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements, such as 401(k) plans, 529 college savings plans or individual retirement accounts. After-tax returns are shown for Investor Class shares only and after-tax returns for other classes will vary.

Management of the Fund

Investment Adviser: Invesco Advisers, Inc. (Invesco or the Adviser)

Portfolio Managers	Title	Length of Service on the Fund
Kevin Holt, CFA	Portfolio Manager (lead)	2020

Umang Khetan, CFA	Portfolio Manager	2020

Purchase and Sale of Fund Shares

You may purchase, redeem or exchange shares of the Fund on any business day through your financial adviser or by telephone at 800-959-4246. Shares of the Fund, other than Class R5 and Class R6 shares, may also be purchased, redeemed or exchanged on any business day through our website at www.invesco.com/us or by mail to Invesco Investment Services, Inc., P.O. Box 219078, Kansas City, MO 64121-9078.

Investor Class shares of the Fund are offered only to grandfathered investors. The minimum investments for Class A, C, Y and Investor Class shares for fund accounts are as follows:

Type of Account	Initial Investment Per Fund	Additional Investments Per Fund
Asset or fee-based accounts managed by your financial adviser	None	None

Employer Sponsored Retirement and Benefit Plans and Employer Sponsored IRAs	None	None

IRAs and Coverdell ESAs if the new investor is purchasing shares through a systematic purchase plan	$25	$25

All other types of accounts if the investor is purchasing shares through a systematic purchase plan	50	50

IRAs and Coverdell ESAs	250	25

All other accounts	1,000	50

With respect to Class R5 and Class R6 shares, there is no minimum initial investment for Employer Sponsored Retirement and Benefit Plans investing through a retirement platform that administers at least $2.5 billion in retirement plan assets. All other Employer Sponsored Retirement and Benefit Plans must meet a minimum initial investment of at least $1 million in each Fund in which it invests.

For all other institutional investors purchasing Class R5 or Class R6 shares, the minimum initial investment in each share class is $1 million, unless such investment is made by (i) an investment company, as defined under the Investment Company Act of 1940, as amended (1940 Act), that is part of a family of investment companies which own in the aggregate at least $100 million in securities, or (ii) an account established with a 529 college savings plan managed by Invesco, in which case there is no minimum initial investment.

There are no minimum investment amounts for Class R6 shares held through retail omnibus accounts maintained by an intermediary, such as a broker, that (i) generally charges an asset-based fee or commission in addition to those described in this prospectus, and (ii) maintains Class R6 shares and makes them available to retail investors.

Tax Information

The Fund’s distributions generally are taxable to you as ordinary income, capital gains, or some combination of both, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan, 529 college savings plan or individual retirement account. Any distributions from a 401(k) plan or individual retirement account may be taxed as ordinary income when withdrawn from such plan or account.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund, the Fund’s distributor or its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson or financial adviser to recommend the Fund over another investment. Ask your salesperson or financial adviser or visit your financial intermediary’s website for more information.

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