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DWS Science and Technology Fund

Summary Prospectus | March 1, 2021

Class/Ticker

KTCAX

KTCTX

KTCCX

INST

KTCIX

KTCSX

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, Statement of Additional Information (SAI) and other information about the fund online at dws.com/mutualpros. You can also get this information at no cost by e-mailing a request to service@dws.com, calling (800) 728-3337 or asking your financial representative. The Prospectus and SAI, both dated March 1, 2021, as may be revised or supplemented from time to time, are incorporated by reference into this Summary Prospectus.

Investment Objective

The fund seeks growth of capital.

Fees and Expenses

These are the fees and expenses you may pay when you buy, hold and sell shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your immediate family invest, or agree to invest in the future, at least $50,000 in Class A shares in DWS funds or if you invest at least $250,000 in Class T shares in the fund. More information about these and other discounts and waivers is available from your financial representative and in Choosing a Share Class in the prospectus (p. 16), Sales Charge Waivers and Discounts Available Through Intermediaries in the prospectus (Appendix B, p. 42) and Purchase and Redemption of Shares in the fund’s SAI (p. II-15).

SHAREHOLDER FEES (paid directly from your investment)

	A	T	C	INST	S
Maximum sales charge (load) imposed on purchases, as % of offering price	5.75	2.50	None	None	None
Maximum deferred sales charge (load), as % of redemption proceeds1	None	None	1.00	None	None
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions)	$20	None	$20	None	$20

ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a % of the value of your investment)

	A	T	C	INST	S
Management fee	0.46	0.46	0.46	0.46	0.46
Distribution/service (12b-1) fees	0.22	0.25	0.98	None	None
Other expenses2	0.22	0.30	0.30	0.23	0.26
Total annual fund operating expenses	0.90	1.01	1.74	0.69	0.72

1 Investments of $1,000,000 or more may be eligible to buy Class A shares without a sales charge (load), but may be subject to a contingent deferred sales charge of 1.00% if redeemed within 12 months of the original purchase date and 0.50% if redeemed within the following six months.

2 ”Other expenses “ for Class T are based on estimated amounts for the current fiscal year.

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. 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:

Years	A	T	C	INST	S
1	$662	$350	$277	$70	$74
3	845	564	548	221	230
5	1,045	794	944	384	401
10	1,619	1,455	2,052	859	894

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

Years	A	T	C	INST	S
1	$662	$350	$177	$70	$74
3	845	564	548	221	230
5	1,045	794	944	384	401
10	1,619	1,455	2,052	859	894

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 may indicate higher transaction costs and may mean higher taxes if you are investing in a taxable account. These costs are not reflected in annual fund operating expenses or in the expense example, and can affect the fund's performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 18% of the average value of its portfolio.

Principal Investment Strategies

Main investments. Under normal circumstances, the fund invests at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in common stocks of science and technology companies. Science and technology companies are (i) companies whose products, processes, or services, in the opinion of portfolio management, benefit, or are expected to benefit, from the use or commercial application of scientific or technological developments or discoveries; or (ii) companies that, in the opinion of portfolio management, utilize technology and/or science to significantly enhance their business opportunities. Such companies may include companies that, in the opinion of portfolio management, derive a competitive advantage by the application of scientific or technological developments or discoveries. For illustrative purposes, examples of the types of companies in which the fund expects to typically invest include software or hardware manufacturers that invest in developing and maintaining technology products or service offerings; service companies that provide technology service offerings; and biotech companies that invest in scientific research to develop treatments for diseases. The fund may invest in companies of any size and may invest in initial public offerings. While the fund invests mainly in US stocks, it could invest up to 35% of net assets in foreign securities (including emerging markets securities). The fund will concentrate its assets in the group of industries constituting the technology sector and may concentrate in one or more industries in the technology sector. Portfolio management may favor securities from various industries and companies within the technology sector at different times.

The fund may also invest up to 20% of its total assets in debt securities, including bonds of private issuers.

Management process. In choosing securities, portfolio management uses a combination of three analytical disciplines:

Bottom-up research. Portfolio management looks for individual companies that it believes have a history of above-average growth, strong competitive positioning, attractive prices relative to potential growth, innovative products and services, sound financial strength and effective management, among other factors.

Growth orientation. Portfolio management generally looks for companies that it believes have above-average potential for sustainable growth of revenue or earnings and whose market value appears reasonable in light of their business prospects.

Top-down analysis. Portfolio management considers the economic outlooks for various industries within the technology sector and looks for those that they believe may benefit from changes in the overall business environment.

In addition, portfolio management uses quantitative analytic tools to attempt to manage the price volatility of the fund as compared to appropriate benchmarks and peer groups.

Portfolio management will normally sell a stock when they believe its price is unlikely to go higher, its fundamentals have changed, other investments offer better opportunities, or in adjusting their emphasis on a given technology industry.

Portfolio management may consider information about Environmental, Social and Governance (ESG) issues in its fundamental research process and when making investment decisions.

Securities lending. The fund may lend securities (up to one-third of total assets) to approved institutions, such as registered broker-dealers, banks and pooled investment vehicles.

Main Risks

There are several risk factors that could hurt the fund’s performance, cause you to lose money or cause the fund’s performance to trail that of other investments. The fund may not achieve its investment objective, and is not intended to be a complete investment program. An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.

Stock market risk. When stock prices fall, you should expect the value of your investment to fall as well. Stock prices can be hurt by poor management on the part of the stock’s issuer, shrinking product demand and other business risks. These may affect single companies as well as groups of companies. The market as a whole may not favor the types of investments the fund makes, which could adversely affect a stock’s price, regardless of how well the company performs, or the fund’s ability to sell a stock at an attractive price. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. Events in the US and global financial markets, including actions

DWS Science and Technology Fund

Summary Prospectus March 1, 2021

taken by the US Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility which could negatively affect performance. High market volatility may also result from significant shifts in momentum of one or more specific stocks due to unusual increases or decreases in trading activity. Momentum can change quickly, and securities subject to shifts in momentum may be more volatile than the market as a whole and returns on such securities may drop precipitously. To the extent that the fund invests in a particular geographic region, capitalization or sector, the fund’s performance may be affected by the general performance of that region, capitalization or sector.

Market disruption risk. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, public health crises and related geopolitical events have led, and in the future may lead, to disruptions in the US and world economies and markets, which may increase financial market volatility and have significant adverse direct or indirect effects on the fund and its investments. Market disruptions could cause the fund to lose money, experience significant redemptions, and encounter operational difficulties. Although multiple asset classes may be affected by a market disruption, the duration and effects may not be the same for all types of assets.

Recent market disruption events include the pandemic spread of the novel coronavirus known as COVID-19, and the significant uncertainty, market volatility, decreased economic and other activity and increased government activity that it has caused. Specifically, COVID-19 has led to significant death and morbidity, and concerns about its further spread have resulted in the closing of schools and non-essential businesses, cancellations, shelter-in-place orders, lower consumer spending in certain sectors, social distancing, bans on large social gatherings and travel, quarantines, government economic stimulus measures, reduced productivity, rapid increases in unemployment, increased demand for and strain on government and medical resources, border closings and global trade and supply chain interruptions, among others. The full effects, duration and costs of the COVID-19 pandemic are impossible to predict, and the circumstances surrounding the COVID-19 pandemic will continue to evolve. The pandemic may affect certain countries, industries, economic sectors, companies and investment products more than others, may exacerbate existing economic, political, or social tensions and may increase the probability of an economic recession or depression. The fund and its investments may be adversely affected by the effects of the COVID-19 pandemic, and a prolonged pandemic may result in the fund and its service providers experiencing operational difficulties in coordinating a remote workforce and implementing their business continuity plans, among others.

The disruptions caused by the COVID-19 pandemic may magnify the impact of each of the other risks described in this “MAIN RISKS” section and may increase volatility in one or more markets in which the fund invests leading to the potential for greater losses for the fund.

Concentration risk. Any fund that concentrates in a particular segment of the market will generally be more volatile than a fund that invests more broadly. Any market price movements, regulatory or technological changes, or economic conditions affecting the particular segment of the market in which the fund concentrates may have a significant impact on the fund’s performance.

Technology sector risk. The fund invests in common stocks of science and technology companies and will concentrate in the group of industries constituting the technology sector and may concentrate in one or more industries in the technology sector. The fund will therefore be susceptible to adverse economic, business, regulatory and other occurrences affecting the technology sector and science and technology companies. In particular, science and technology companies are vulnerable to market saturation and rapid product obsolescence. Many science and technology companies operate under constantly changing fields and have limited business lines and limited financial resources, making them highly vulnerable to business and economic risks. Other investment risks associated with investing in science and technology securities include abrupt or erratic market movements, management that is dependent on a limited number of people, short product cycles, changing consumer preferences, aggressive pricing of products and services, new market entrants and dependency on patent protection.

Small company risk. Small company stocks tend to be more volatile than medium-sized or large company stocks. Because stock analysts are less likely to follow small companies, less information about them is available to investors. Industry-wide reversals may have a greater impact on small companies, since they may lack the financial resources of larger companies. Small company stocks are typically less liquid than large company stocks.

Medium-sized company risk. Medium-sized company stocks tend to be more volatile than large company stocks. Because stock analysts are less likely to follow medium-sized companies, less information about them is available to investors. Industry-wide reversals may have a greater impact on medium-sized companies, since they lack the financial resources of larger companies. Medium-sized company stocks are typically less liquid than large company stocks.

Foreign investment risk. The fund faces the risks inherent in foreign investing. Adverse political, economic or social developments, as well as US and foreign government actions such as the imposition of tariffs, economic and trade sanctions or embargoes, could undermine the value of the fund’s investments, prevent the fund from realizing the full value of its investments or prevent the

DWS Science and Technology Fund

Summary Prospectus March 1, 2021

fund from selling securities it holds. In June 2016, citizens of the United Kingdom approved a referendum to leave the European Union (EU) and in March 2017, the United Kingdom initiated the formal process of withdrawing from the EU. On January 31, 2020, the United Kingdom officially withdrew from the EU pursuant to a withdrawal agreement, providing for a transition period in which the United Kingdom negotiated and finalized a trade deal with the EU, the EU-UK Trade and Cooperation Agreement (the Trade Agreement), provisionally applied effective January 1, 2021. As a result, as of January 1, 2021 the United Kingdom is no longer part of the EU customs union and single market, nor is it subject to EU policies and international agreements. Among other things, the Trade Agreement provides for zero tariffs and zero quotas on all goods that comply with appropriate rules of origin and establishes the treatment and level of access the United Kingdom and EU have agreed to grant each other’s service suppliers and investors. In addition to trade in goods and services and investment, the Trade Agreement also covers digital trade, intellectual property, public procurement, aviation and road transport, energy, fisheries, social security coordination, law enforcement and judicial cooperation in criminal matters, thematic cooperation and participation in EU programs. Even with the Trade Agreement in place, the United Kingdom’s withdrawal from the EU may create new barriers to trade in goods and services and to cross-border mobility and exchanges, including with respect to trade in financial services which is not comprehensively addressed in the Trade Agreement and remains subject to negotiation between the United Kingdom and the EU. The long-term impact of the United Kingdom’s withdrawal from the EU is still unknown and could have adverse economic and political effects on the United Kingdom, the EU and its member countries, and the global economy, including financial markets and asset valuations.

Financial reporting standards for companies based in foreign markets differ from those in the US. Additionally, foreign securities markets generally are smaller and less liquid than US markets. To the extent that the fund invests in non-US dollar denominated foreign securities, changes in currency exchange rates may affect the US dollar value of foreign securities or the income or gain received on these securities. In addition, because non-US markets may be open on days when the fund does not price its shares, the value of the securities in the fund’s portfolio may change on days when shareholders will not be able to purchase or sell the fund’s shares.

Emerging markets risk. Foreign investment risks are greater in emerging markets than in developed markets. Investments in emerging markets are often considered speculative.

Pricing risk. If market conditions make it difficult to value some investments, the fund may value these investments using more subjective methods, such as fair value pricing. In such cases, the value determined for an investment

could be different from the value realized upon such investment’s sale. As a result, you could pay more than the market value when buying fund shares or receive less than the market value when selling fund shares.

Non-diversification risk. The fund is classified as non-diversified under the Investment Company Act of 1940, as amended. This means that the fund may invest in securities of relatively few issuers. Thus, the performance of one or a small number of portfolio holdings can affect overall performance.

Security selection risk. The securities in the fund’s portfolio may decline in value. Portfolio management could be wrong in its analysis of industries, companies, economic trends, the relative attractiveness of different securities or other matters.

Securities lending risk. Any decline in the value of a portfolio security that occurs while the security is out on loan is borne by the fund and will adversely affect performance. Also, there may be delays in recovery of securities loaned or even a loss of rights in the collateral should the borrower of the securities fail financially while holding the security.

Counterparty risk. A financial institution or other counterparty with whom the fund does business, or that underwrites, distributes or guarantees any investments or contracts that the fund owns or is otherwise exposed to, may decline in financial health and become unable to honor its commitments. This could cause losses for the fund or could delay the return or delivery of collateral or other assets to the fund.

Growth investing risk. As a category, growth stocks may underperform value stocks (and the stock market as a whole) over any period of time. Because the prices of growth stocks are based largely on the expectation of future earnings, growth stock prices can decline rapidly and significantly in reaction to negative news about such factors as earnings, the economy, political developments, or other news.

IPO risk. Prices of securities bought in an initial public offering (IPO) may rise and fall rapidly, often because of investor perceptions rather than economic reasons. To the extent a mutual fund is small in size, its IPO investments may have a significant impact on its performance since they may represent a larger proportion of the fund’s overall portfolio as compared to the portfolio of a larger fund.

Liquidity risk. In certain situations, it may be difficult or impossible to sell an investment and/or the fund may sell certain investments at a price or time that is not advantageous in order to meet redemption requests or other cash needs. Unusual market conditions, such as an unusually high volume of redemptions or other similar conditions could increase liquidity risk for the fund.

Restricted securities risk. The fund may purchase securities that are subject to legal or contractual restriction on resale (“restricted securities”). The fund may be unable to

DWS Science and Technology Fund

Summary Prospectus March 1, 2021

sell a restricted security and it may be more difficult to determine a market value for a restricted security. This investment practice, therefore, could increase the level of illiquidity of the fund.

Credit risk. The fund's performance could be hurt if an issuer of a debt security suffers an adverse change in financial condition that results in the issuer not making timely payments of interest or principal, a security downgrade or an inability to meet a financial obligation.

Interest rate risk. When interest rates rise, prices of debt securities generally decline. The longer the duration of the fund’s debt securities, the more sensitive the fund will be to interest rate changes. (As a general rule, a 1% rise in interest rates means a 1% fall in value for every year of duration.) Recent and potential future changes in monetary policy made by central banks or governments are likely to affect the level of interest rates. Rising interest rates may prompt redemptions from the fund, which may force the fund to sell investments at a time when it is not advantageous to do so, which could result in losses. The fund may be subject to a greater risk of rising interest rates following periods of low rates, including the current low rate period. In addition, in response to the COVID-19 pandemic, as with other serious economic disruptions, governmental authorities and regulators are enacting significant fiscal and monetary policy changes, including providing direct capital infusions into companies, creating new monetary programs and lowering interest rates considerably. If these actions are unexpectedly or suddenly reversed or are ineffective in achieving their desired outcomes, the fund could be adversely affected by periods of heightened volatility and uncertainty.

Prepayment and extension risk. When interest rates fall, issuers of high interest debt obligations may pay off the debts earlier than expected (prepayment risk), and the fund may have to reinvest the proceeds at lower yields. When interest rates rise, issuers of lower interest debt obligations may pay off the debts later than expected (extension risk), thus keeping the fund’s assets tied up in lower interest debt obligations. Ultimately, any unexpected behavior in interest rates could increase the volatility of the fund’s share price and yield and could hurt fund performance. Prepayments could also create capital gains tax liability in some instances.

ESG investing risk. When portfolio management considers ESG factors in its fundamental research process and when making investment decisions, there is a risk that the fund may forgo otherwise attractive investment opportunities or increase or decrease its exposure to certain types of issuers and, therefore, may underperform funds that do not consider ESG factors.

Operational and technology risk. Cyber-attacks, disruptions or failures that affect the fund’s service providers or counterparties, issuers of securities held by the fund, or other market participants may adversely affect the fund and its shareholders, including by causing losses for the

fund or impairing fund operations. For example, the fund’s or its service providers’ assets or sensitive or confidential information may be misappropriated, data may be corrupted and operations may be disrupted (e.g., cyber-attacks, operational failures or broader disruptions may cause the release of private shareholder information or confidential fund information, interfere with the processing of shareholder transactions, impact the ability to calculate the fund’s net asset value and impede trading). Market events and disruptions also may trigger a volume of transactions that overloads current information technology and communication systems and processes, impacting the ability to conduct the fund’s operations.

While the fund and its service providers may establish business continuity and other plans and processes that seek to address the possibility of and fallout from cyber-attacks, disruptions or failures, there are inherent limitations in such plans and systems, including that they do not apply to third parties, such as fund counterparties, issuers of securities held by the fund or other market participants, as well as the possibility that certain risks have not been identified or that unknown threats may emerge in the future and there is no assurance that such plans and processes will be effective. Among other situations, disruptions (for example, pandemics or health crises) that cause prolonged periods of remote work or significant employee absences at the fund’s service providers could impact the ability to conduct the fund’s operations. In addition, the fund cannot directly control any cybersecurity plans and systems put in place by its service providers, fund counterparties, issuers of securities held by the fund or other market participants.

Past Performance

How a fund's returns vary from year to year can give an idea of its risk; so can comparing fund performance to overall market performance (as measured by an appropriate market index). Past performance may not indicate future results. All performance figures below assume that dividends and distributions were reinvested. For more recent performance figures, go to dws.com (the Web site does not form a part of this prospectus) or call the telephone number included in this prospectus.

Class T had not commenced investment operations as of the date of this prospectus. The performance figures for Class T shares are based on the historical performance of the fund’s Institutional Class shares adjusted to reflect the higher expenses and applicable sales charges of Class T.

DWS Science and Technology Fund

Summary Prospectus March 1, 2021

CALENDAR YEAR TOTAL RETURNS (%) (Class A)

These year-by-year returns do not include sales charges, if any, and would be lower if they did. Returns for other classes were different and are not shown here.

	Returns	Period ending
Best Quarter	32.19%	June 30, 2020
Worst Quarter	-18.59%	December 31, 2018

Average Annual Total Returns
(For periods ended 12/31/2020 expressed as a %)

After-tax returns (which are shown only for Class A and would be different for other classes) reflect the historical highest individual federal income tax rates, but do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k) or other tax-advantaged investment plan.

	Class Inception	1 Year	5 Years	10 Years
Class A before tax	9/7/1948	37.71	22.88	16.27
After tax on distribu- tions		35.34	20.80	14.48
After tax on distribu- tions and sale of fund shares		23.99	18.22	13.13
Class T before tax		42.36	23.60	16.60
Class C before tax	5/31/1994	44.89	23.25	15.93
INST Class before tax	8/19/2002	46.46	24.61	17.26
Class S before tax	12/20/2004	46.36	24.54	17.12
S&P 500® Index (reflects no deduction for fees, expenses or taxes)		18.40	15.22	13.88
S&P North American Technology Sector Index (reflects no deduc- tion for fees, expenses or taxes)		45.15	27.23	20.57

The Advisor believes the additional S&P North American Technology Sector Index generally reflects fund asset allocations and generally represents the fund's overall investment process.

Management

Investment Advisor

DWS Investment Management Americas, Inc.

Portfolio Manager(s)

Daniel Fletcher, CFA, Director. Portfolio Manager of the fund. Began managing the fund in 2017.

Sebastian P. Werner, PhD, Director. Portfolio Manager of the fund. Began managing the fund in 2017.

Purchase and Sale of Fund Shares

Minimum Initial Investment ($)

	Non-IRA	IRAs	UGMAs/ UTMAs	Automatic Investment Plans
A T C	1,000	500	1,000	500
INST	1,000,000	N/A	N/A	N/A
S	2,500	1,000	1,000	1,000

For participants in all group retirement plans for Class A, T, C and S shares, and in certain fee-based and wrap programs approved by the Advisor for Class A, C and S shares, there is no minimum initial investment and no minimum additional investment. For Section 529 college savings plans, there is no minimum initial investment and no minimum additional investment for Class S shares. Certain intermediaries that offer Class S shares in their brokerage platforms may be eligible for an investment minimum waiver. In certain instances, the minimum initial investment may be waived for Institutional Class shares. There is no minimum additional investment for Institutional Class shares. The minimum additional investment in all other instances is $50.

To Place Orders

Mail	All Requests	DWS PO Box 219151 Kansas City, MO 64121-9151
Expedited Mail		DWS 210 West 10th Street Kansas City, MO 64105-1614
Web Site		dws.com
Telephone		(800) 728-3337, M – F 8 a.m. – 7 p.m. ET
TDD Line		(800) 972-3006, M – F 8 a.m. – 7 p.m. ET

The fund is generally open on days when the New York Stock Exchange is open for regular trading. Initial investments must be sent by mail. You can make additional investments or sell shares of the fund on any business day by visiting our Web site, by mail, or by telephone; however you may have to elect certain privileges on your initial account application. If you are working with a financial representative, contact your financial representative for assistance with buying or selling fund shares. A financial representative separately may impose its own policies and procedures for buying and selling fund shares.

Class T shares are closed to new purchases, except in connection with the reinvestment of dividends or other distributions where Class T shares have been issued. Institutional Class shares are generally available only to qualified institutions. Class S shares are available through certain intermediary relationships with financial services firms, or can be purchased by establishing an account directly with the fund’s transfer agent.

DWS Science and Technology Fund

Summary Prospectus March 1, 2021

Tax Information

The fund's distributions are generally taxable to you as ordinary income or capital gains, except when your investment is in an IRA, 401(k), or other tax-advantaged investment plan. Any withdrawals you make from such tax- advantaged investment plans, however, may be taxable to you.

Payments to Broker-Dealers and
Other Financial Intermediaries

If you purchase shares of the fund through a broker-dealer or other financial intermediary (such as a bank), the fund, the Advisor, and/or the Advisor’s affiliates 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 to recommend the fund over another investment. Ask your salesperson or visit your financial intermediary’s Web site for more information.

DWS Science and Technology Fund

Summary Prospectus March 1, 2021 DSTF-SUM