N-CSRS

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D. C. 20549

FORM N-CSRS

Investment Company Act file number: 811-00043

Deutsche Investment Trust

(Exact Name of Registrant as Specified in Charter)

345 Park Avenue

New York, NY 10154-0004

(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, including Area Code: (212) 250-3220

Paul Schubert

345 Park Avenue

New York, NY 10154-0004

(Name and Address of Agent for Service)

Date of fiscal year end:	9/30
Date of reporting period:	3/31/2018

ITEM 1. REPORT TO STOCKHOLDERS

March 31, 2018

Semiannual Report

to Shareholders

Deutsche Capital Growth Fund

Contents

3	Letter to Shareholders
4	Performance Summary
7	Portfolio Manager
7	Portfolio Summary
9	Investment Portfolio
14	Statement of Assets and Liabilities
16	Statement of Operations
17	Statements of Changes in Net Assets

18	Financial Highlights
24	Notes to Financial Statements
33	Information About Your Fund’s Expenses
35	Advisory Agreement Board Considerations and Fee Evaluation
40	Account Management Resources
42	Privacy Statement

This report must be preceded or accompanied by a prospectus. To obtain a summary prospectus, if available, or prospectus for any of our funds, refer to the Account Management Resources information provided in the back of this booklet. We advise you to consider the Fund’s objectives, risks, charges and expenses carefully before investing. The summary prospectus and prospectus contain this and other important information about the Fund. Please read the prospectus carefully before you invest.

The Fund may lend securities to approved institutions. Stocks may decline in value. Please read the prospectus for details.

The brand DWS represents DWS Group GmbH & Co. KGaA and any of its subsidiaries such as DWS Distributors, Inc. which offers investment products or Deutsche Investment Management Americas Inc. and RREEF America L.L.C. which offer advisory services.

NOT FDIC/NCUA INSURED     NO BANK GUARANTEE     MAY LOSE VALUE NOT A DEPOSIT     NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY

2    Deutsche Capital Growth Fund

Letter to Shareholders

Dear Shareholder:

You may have noticed a new logo appearing on the cover of this report. As of March 23, 2018, Deutsche Asset Management has adopted its existing European brand, DWS, globally. As we have consolidated several businesses over the last several years, each of which has grown up relatively independently, the time has now come to be united under a single brand that reflects our global identity and the full breadth of capabilities we offer to our clients.

The DWS brand — Deutsche Gesellschaft für Wertpapiersparen — draws on our roots in the German market, going back over 60 years. It was established in Hamburg in 1956 with a singular objective: to assist private investors in building wealth and managing risk. We have been fulfilling that promise for generations. Today, the DWS name is synonymous with the values that we have continuously lived up to, and those that will remain central to our future success: Excellence, Entrepreneurship, Sustainability and Integrity. It is therefore a name that we are proud to adopt and build upon as our brand here in the Americas.

In connection with this change, our web site has recently been redesigned with a new address: dws.com. However, for your convenience, the deutschefunds.com address will remain live and automatically redirect you to our new site. Please visit us online to find the most current insights from our CIO, economists and investment specialists.

As always, thank you for your ongoing trust in us. We look forward to bringing you the very best in investment insight, strategies and solutions as we march forward gathering our unique qualities and capabilities under one roof, DWS.

Best regards,

Hepsen Uzcan   President, Deutsche Funds

Assumptions, estimates and opinions contained in this document constitute our judgment as of the date of the document and are subject to change without notice. Any projections are based on a number of assumptions as to market conditions and there can be no guarantee that any projected results will be achieved. Past performance is not a guarantee of future results.

Deutsche Capital Growth Fund    3

Performance Summary March 31, 2018 (Unaudited)

Class A	6-Month‡		1-Year		5-Year		10-Year
Average Annual Total Returns as of 3/31/18
Unadjusted for Sales Charge		7.07%		17.75%		14.61%		9.39%
Adjusted for the Maximum Sales Charge (max 5.75% load)		0.92%		10.97%		13.26%		8.74%
Russell 1000® Growth Index†		9.39%		21.25%		15.53%		11.34%
Class C	6-Month‡		1-Year		5-Year		10-Year
Average Annual Total Returns as of 3/31/18
Unadjusted for Sales Charge		6.62%		16.71%		13.67%		8.52%
Adjusted for the Maximum Sales Charge (max 1.00% CDSC)		5.65%		16.71%		13.67%		8.52%
Russell 1000® Growth Index†		9.39%		21.25%		15.53%		11.34%
Class R	6-Month‡		1-Year		5-Year		10-Year
Average Annual Total Returns as of 3/31/18
No Sales Charges		6.84%		17.25%		14.15%		9.02%
Russell 1000® Growth Index†		9.39%		21.25%		15.53%		11.34%
Class R6			6-Month‡		1-Year		Life of Class*
Average Annual Total Returns as of 3/31/18
No Sales Charges				7.24%		18.11%		11.98%
Russell 1000® Growth Index†				9.39%		21.25%		10.23%
Class S	6-Month‡		1-Year		5-Year		10-Year
Average Annual Total Returns as of 3/31/18
No Sales Charges		7.20%		18.03%		14.90%		9.67%
Russell 1000® Growth Index†		9.39%		21.25%		15.53%		11.34%
Institutional Class	6-Month‡		1-Year		5-Year		10-Year
Average Annual Total Returns as of 3/31/18
No Sales Charges		7.20%		17.99%		14.91%		9.72%
Russell 1000® Growth Index†		9.39%		21.25%		15.53%		11.34%

Performance in the Average Annual Total Returns table above and the Growth of an Assumed $10,000 Investment line graph that follows is historical and does not guarantee future results. Investment return and principal fluctuate, so your shares may be worth more or less when redeemed. Current performance may differ from performance data shown. Please visit dws.com for the Fund’s most

4    Deutsche Capital Growth Fund

recent month-end performance. Fund performance includes reinvestment of all distributions. Unadjusted returns do not reflect sales charges and would have been lower if they had.

The gross expense ratios of the Fund, as stated in the fee table of the prospectus dated February 1, 2018 are 0.96%, 1.84%, 1.37%, 0.65%, 0.71% and 0.73% for Class A, Class C, Class R, Class R6, Class S and Institutional Class shares, respectively, and may differ from the expense ratios disclosed in the Financial Highlights tables in this report.

Index returns do not reflect any fees or expenses and it is not possible to invest directly into an index.

Performance figures do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.

Generally accepted accounting principles require adjustments to be made to the net assets of the Fund at period end for financial reporting purposes only, and as such, the total return based on the unadjusted net asset value per share may differ from the total return reported in the financial highlights.

Growth of an Assumed $10,000 Investment
(Adjusted for Maximum Sales Charge)

The Fund’s growth of an assumed $10,000 investment is adjusted for the maximum sales charge of 5.75%. This results in a net initial investment of $9,425.

The growth of $10,000 is cumulative.

Performance of other share classes will vary based on the sales charges and the fee structure of those classes.

* Class R6 shares commenced operations on August 25, 2014.

^†  The Russell 1000 Growth Index is an unmanaged index that consists of those stocks in the Russell 1000 Index that have higher price-to-book ratios and higher forecasted growth values.

^‡  Total returns shown for periods less than one year are not annualized.

Deutsche Capital Growth Fund    5

	Class A		Class C		Class R		Class R6		Class S		Institutional Class
Net Asset Value
3/31/18	$	77.89	$	67.18	$	76.81	$	78.34	$	78.66	$	78.57
9/30/17	$	79.22	$	69.19	$	78.07	$	79.77	$	80.05	$	79.95
Distribution Information as of 3/31/18
Income Dividends, Six Months	$	.32	$	—	$	—	$	.58	$	.54	$	.52
Capital Gain Distributions, Six Months	$	6.52	$	6.52	$	6.52	$	6.52	$	6.52	$	6.52

6    Deutsche Capital Growth Fund

Portfolio Manager

Sebastian P. Werner, PhD, Director

Portfolio Manager of the fund. Began managing the fund in 2016.

– Joined DWS in 2008; previously, he served as a Research Assistant for the Endowed Chair of Asset Management at the European Business School, Oestrich -Winkel while earning his PhD.

– Portfolio Manager for Global and US Growth Equities: New York.

– MBA in International Management from the Thunderbird School of Global Management; Masters Degree (“Diplom-Kaufmann”) and PhD in Finance (“Dr.rer.pol.”) from the European Business School, Oestrich-Winkel.

Portfolio Summary		(Unaudited)
Asset Allocation (As a % of Investment Portfolio excluding Securities Lending Collateral)	3/31/18		9/30/17
Common Stocks		100%		100%
Cash Equivalents		0%		0%
Convertible Preferred Stocks		0%		0%
		100%		100%
Sector Diversification (As a % of Common Stocks and Convertible Preferred Stocks)	3/31/18		9/30/17
Information Technology		37%		37%
Consumer Discretionary		19%		17%
Health Care		17%		17%
Industrials		10%		10%
Financials		6%		5%
Consumer Staples		4%		6%
Telecommunication Services		2%		2%
Real Estate		2%		2%
Materials		2%		3%
Energy		1%		1%
		100%		100%

Deutsche Capital Growth Fund    7

Ten Largest Equity Holdings at March 31, 2018 (36.5% of Net Assets)
	1.	Microsoft Corp.	5.5	%
		Develops, manufactures, licenses, sells and supports software products
	2.	Apple, Inc.	5.4	%
		Designs, manufactures and markets personal computing and mobile communication devices
	3.	Alphabet, Inc.	4.8	%
		Holding company with subsidiaries that provide Web-based search, maps, hardware products and various software applications
	4.	Amazon.com, Inc.	4.5	%
		Online retailer offering a wide range of products
	5.	Visa, Inc.	3.6	%
		Operates a retail electronic payments network and manages global financial services
	6.	Becton, Dickinson & Co.	2.8	%
		Provider of medical supplies and devices
	7.	Home Depot, Inc.	2.7	%
		Home improvement retailer that sells building materials and home improvements products
	8.	Boeing Co.	2.5	%
		Manufacturer of jet aircrafts
	9.	Thermo Fisher Scientific, Inc.	2.4	%
		Manufacturer of measurement instruments that monitor, collect, and analyze information for various industries
	10.	Progressive Corp.	2.3	%
		Provider of property and casualty insurance

Portfolio holdings and characteristics are subject to change.

For more complete details about the fund’s investment portfolio, see page 9. A quarterly Fact Sheet is available on dws.com or upon request. Please see the Account Management Resources section on page 40 for contact information.

8    Deutsche Capital Growth Fund

Investment Portfolio as of March 31, 2018 (Unaudited)

	Shares		Value ($)
Common Stocks 99.6%
Consumer Discretionary 18.6%
Hotels, Restaurants & Leisure 2.6%
Las Vegas Sands Corp.		148,825		10,700,518
McDonald’s Corp.		177,403		27,742,281
				38,442,799
Internet & Direct Marketing Retail 5.8%
Amazon.com, Inc.*		46,390		67,142,103
Booking Holdings, Inc.*		9,188		19,114,623
				86,256,726
Media 4.8%
Comcast Corp. “A”		614,900		21,011,133
Live Nation Entertainment, Inc.*		169,388		7,138,010
Time Warner, Inc.		182,154		17,228,125
Walt Disney Co.		258,381		25,951,788
				71,329,056
Multiline Retail 1.0%
Dollar General Corp.		157,202		14,706,247
Specialty Retail 3.7%
Burlington Stores, Inc.*		116,355		15,492,668
Home Depot, Inc.		222,500		39,658,400
				55,151,068
Textiles, Apparel & Luxury Goods 0.7%
Carter’s, Inc.		100,691		10,481,933
Consumer Staples 4.1%
Food & Staples Retailing 1.0%
Costco Wholesale Corp.		78,947		14,875,983
Food Products 1.7%
Mondelez International, Inc. “A”		246,930		10,304,389
Pinnacle Foods, Inc.		279,426		15,116,947
				25,421,336
Personal Products 1.4%
Estee Lauder Companies, Inc. “A”		139,059		20,819,913
Energy 0.8%
Oil, Gas & Consumable Fuels
Concho Resources, Inc.*		81,752		12,289,778
Financials 5.7%
Banks 1.2%
SVB Financial Group*		71,889		17,254,079

The accompanying notes are an integral part of the financial statements.

Deutsche Capital Growth Fund    9

	Shares		Value ($)
Capital Markets 2.2%
Charles Schwab Corp.		339,973		17,753,390
Intercontinental Exchange, Inc.		216,305		15,686,439
				33,439,829
Insurance 2.3%
Progressive Corp.		550,195		33,523,381
Health Care 16.6%
Biotechnology 4.6%
Alexion Pharmaceuticals, Inc.*		142,257		15,855,965
Biogen, Inc.*		39,434		10,797,818
BioMarin Pharmaceutical, Inc.*		96,160		7,795,691
Celgene Corp.*		264,047		23,555,633
Shire PLC (ADR)		69,714		10,414,575
				68,419,682
Health Care Equipment & Supplies 5.5%
Becton, Dickinson & Co.		190,823		41,351,344
Danaher Corp.		197,213		19,309,125
Hologic, Inc.*		352,241		13,159,724
The Cooper Companies, Inc.		32,048		7,332,903
				81,153,096
Health Care Providers & Services 1.1%
Cigna Corp.		98,784		16,570,028
Life Sciences Tools & Services 2.5%
Thermo Fisher Scientific, Inc.		175,386		36,210,193
Pharmaceuticals 2.9%
Allergan PLC		82,324		13,854,306
Bristol-Myers Squibb Co.		119,341		7,548,318
Zoetis, Inc.		258,771		21,609,966
				43,012,590
Industrials 10.4%
Aerospace & Defense 3.4%
Boeing Co.		111,240		36,473,371
TransDigm Group, Inc.		45,613		14,000,454
				50,473,825
Electrical Equipment 2.0%
Acuity Brands, Inc.		35,214		4,901,437
AMETEK, Inc.		322,201		24,477,610
				29,379,047
Industrial Conglomerates 1.4%
Roper Technologies, Inc.		75,226		21,115,186

The accompanying notes are an integral part of the financial statements.

10    Deutsche Capital Growth Fund

	Shares		Value ($)
Machinery 1.1%
Parker-Hannifin Corp.		95,530		16,338,496
Professional Services 1.3%
Verisk Analytics, Inc.*		194,377		20,215,208
Road & Rail 1.2%
Norfolk Southern Corp.		127,508		17,313,036
Information Technology 37.4%
Communications Equipment 0.6%
Palo Alto Networks, Inc.*		49,385		8,964,365
Internet Software & Services 6.8%
Alphabet, Inc. “A”*		35,547		36,867,216
Alphabet, Inc. “C”*		32,735		33,775,646
Facebook, Inc. “A”*		192,483		30,756,858
				101,399,720
IT Services 7.3%
Cognizant Technology Solutions Corp. “A”		292,472		23,543,996
Fidelity National Information Services, Inc.		183,609		17,681,547
Global Payments, Inc.		131,578		14,673,578
Visa, Inc. “A”		441,118		52,766,535
				108,665,656
Semiconductors & Semiconductor Equipment 4.4%
Analog Devices, Inc.		166,022		15,129,585
Broadcom Ltd.		118,877		28,013,365
NVIDIA Corp.		92,651		21,457,045
				64,599,995
Software 12.9%
Activision Blizzard, Inc.		211,225		14,249,239
Adobe Systems, Inc.*		129,113		27,898,737
Intuit, Inc.		95,551		16,563,766
Microsoft Corp.		901,589		82,288,028
Oracle Corp.		354,711		16,228,028
salesforce.com, Inc.*		212,756		24,743,523
ServiceNow, Inc.*		51,151		8,462,933
				190,434,254
Technology Hardware, Storage & Peripherals 5.4%
Apple, Inc.		478,847		80,340,950
Materials 1.6%
Chemicals 0.9%
Albemarle Corp.		134,739		12,495,695
Construction Materials 0.7%
Vulcan Materials Co.		94,176		10,752,074

The accompanying notes are an integral part of the financial statements.

Deutsche Capital Growth Fund    11

	Shares			Value ($)
Real Estate 1.9%
Equity Real Estate Investment Trusts (REITs)
Digital Realty Trust, Inc.		151,872			16,004,272
Prologis, Inc.		189,188			11,916,952
					27,921,224
Telecommunication Services 2.5%
Diversified Telecommunication Services 1.1%
Zayo Group Holdings, Inc.*		454,684			15,532,006
Wireless Telecommunication Services 1.4%
T-Mobile U.S., Inc.*		348,985			21,302,044
Total Common Stocks (Cost $851,918,172)					1,476,600,498
Convertible Preferred Stock 0.0%
Industrials
Stericycle, Inc., Series A, 5.25% (Cost $479,700)		4,797			217,016
Cash Equivalents 0.5%
Deutsche Central Cash Management Government Fund, 1.64% (a) (Cost $7,149,316)		7,149,316			7,149,316
	% of Net Assets			Value ($)
Total Investment Portfolio (Cost $859,547,188)		100.1			1,483,966,830
Other Assets and Liabilities, Net		(0.1	)		(1,400,629	)
Net Assets		100.0			1,482,566,201

A summary of the Fund’s transactions with affiliated Underlying Deutsche Funds during the period ended March 31, 2018 are as follows:

Value ($) at 9/30/2017	Purchases Cost ($)		Sales Proceeds ($)		Net Realized Gain/ (Loss) ($)		Net Change in Unrealized Appreciation (Depreciation) ($)		Income ($)		Capital Gain Distributions ($)		Number of Shares at 3/31/2018		Value ($) at 3/31/2018
Securities Lending Collateral 0.9%
Deutsche Government & Agency Securities Portfolio “Deutsche Government Cash Institutional Shares”, 0.93% (a) (b)
12,678,750		—		12,678,750		—		—		2,519		—		—		—
Cash Equivalents 0.5%
Deutsche Central Cash Management Government Fund, 1.64% (a)
5,311,227		143,155,966		141,317,877		—		—		103,054		—		7,149,316		7,149,316
17,989,977		143,155,966		153,996,627		—		—		105,573		—		7,149,316		7,149,316

* Non-income producing security.

(a) Affiliated fund managed by Deutsche Investment Management Americas Inc. The rate shown is the annualized seven-day yield at period end.

The accompanying notes are an integral part of the financial statements.

12    Deutsche Capital Growth Fund

(b) Represents collateral held in connection with securities lending. Income earned by the Fund is net of borrower rebates. Represents the net increase (purchase cost) or decrease (sales proceeds) in the amount invested for the period ended March 31, 2018.

ADR: American Depositary Receipt

Fair Value Measurements

Various inputs are used in determining the value of the Fund’s investments. These inputs are summarized in three broad levels. Level 1 includes quoted prices in active markets for identical securities. Level 2 includes other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds and credit risk). Level 3 includes significant unobservable inputs (including the Fund’s own assumptions in determining the fair value of investments). The level assigned to the securities valuations may not be an indication of the risk or liquidity associated with investing in those securities.

The following is a summary of the inputs used as of March 31, 2018 in valuing the Fund’s investments. For information on the Fund’s policy regarding the valuation of investments, please refer to the Security Valuation section of Note A in the accompanying Notes to Financial Statements.

Assets	Level 1		Level 2		Level 3		Total
Common Stocks (c)	$	1,476,600,498	$	—	$	—	$	1,476,600,498
Convertible Preferred Stocks		217,016		—		—		217,016
Short-Term Investments		7,149,316		—		—		7,149,316
Total	$	1,483,966,830	$	—	$	—	$	1,483,966,830

There have been no transfers between fair value measurement levels during the period ended March 31, 2018.

(c) See Investment Portfolio for additional detailed categorizations.

The accompanying notes are an integral part of the financial statements.

Deutsche Capital Growth Fund    13

Statement of Assets and Liabilities

as of March 31, 2018 (Unaudited)
Assets
Investments in non-affiliated securities, at value (cost $852,397,872)	$	1,476,817,514
Investment in Deutsche Central Cash Management Government Fund (cost $7,149,316)		7,149,316
Cash		12,204
Receivable for Fund shares sold		84,735
Dividends receivable		387,506
Interest receivable		13,171
Other assets		49,818
Total assets		1,484,514,264
Liabilities
Payable for Fund shares redeemed		515,290
Accrued management fee		597,968
Accrued Trustees’ fees		9,602
Other accrued expenses and payables		825,203
Total liabilities		1,948,063
Net assets, at value	$	1,482,566,201
Net Assets Consist of
Undistributed net investment income		2,288,455
Net unrealized appreciation (depreciation) on investments		624,419,642
Accumulated net realized gain (loss)		112,952,521
Paid-in capital		742,905,583
Net assets, at value	$	1,482,566,201

The accompanying notes are an integral part of the financial statements.

14    Deutsche Capital Growth Fund

Statement of Assets and Liabilities as of March 31, 2018 (Unaudited) (continued)

Net Asset Value
Class A
Net Asset Value and redemption price per share ($611,634,613 ÷ 7,852,791 shares of capital stock outstanding, $.01 par value, unlimited shares authorized)	$	77.89
Maximum offering price per share (100 ÷ 94.25 of $77.89)	$	82.64
Class C
Net Asset Value offering and redemption price per share ($20,823,045 ÷ 309,936 shares of capital stock outstanding, $.01 par value, unlimited shares authorized)	$	67.18
Class R
Net Asset Value offering and redemption price per share ($8,404,310 ÷ 109,416 shares of capital stock outstanding, $.01 par value, unlimited shares authorized)	$	76.81
Class R6
Net Asset Value offering and redemption price per share ($1,486,660 ÷ 18,978 shares of capital stock outstanding, $.01 par value, unlimited shares authorized)	$	78.34
Class S
Net Asset Value offering and redemption price per share ($779,528,826 ÷ 9,909,663 shares of capital stock outstanding, $.01 par value, unlimited shares authorized)	$	78.66
Institutional Class
Net Asset Value offering and redemption price per share ($60,688,747 ÷ 772,451 shares of capital stock outstanding, $.01 par value, unlimited shares authorized)	$	78.57

The accompanying notes are an integral part of the financial statements.

Deutsche Capital Growth Fund    15

Statement of Operations

for the six months ended March 31, 2018 (Unaudited)
Investment Income
Income:
Dividends	$	8,461,118
Income distributions — Deutsche Central Cash Management Government Fund		103,054
Securities lending income, net of borrower rebates		2,519
Total income		8,566,691
Expenses:
Management fee		3,495,511
Administration fee		754,694
Services to shareholders		867,547
Distribution and service fees		847,712
Custodian fee		7,484
Professional fees		61,350
Reports to shareholders		51,064
Registration fees		38,464
Trustees’ fees and expenses		45,388
Other		36,946
Total expenses		6,206,160
Net investment income		2,360,531
Realized and Unrealized Gain (Loss)
Net realized gain (loss) from investments		114,205,145
Change in net unrealized appreciation (depreciation) on investments		(12,564,039	)
Net gain (loss)		101,641,106
Net increase (decrease) in net assets resulting from operations	$	104,001,637

The accompanying notes are an integral part of the financial statements.

16    Deutsche Capital Growth Fund

Statements of Changes in Net Assets

	Six Months Ended March 31, 2018 (Unaudited)			Year Ended September 30, 2017
Increase (Decrease) in Net Assets
Operations:
Net investment income (loss)	$	2,360,531		$	7,760,631
Net realized gain (loss)		114,205,145			117,794,051
Change in net unrealized appreciation (depreciation)		(12,564,039	)		144,890,842
Net increase (decrease) in net assets resulting from operations		104,001,637			270,445,524
Distributions to shareholders from:
Net investment income:
Class A		(2,401,394	)		(1,295,345	)
Class R6		(5,788	)		(1,505	)
Class S		(5,019,935	)		(3,349,032	)
Institutional Class		(383,937	)		(1,038,670	)
Net realized gains:
Class A		(48,863,677	)		(41,881,532	)
Class C		(2,033,354	)		(2,120,984	)
Class R		(681,237	)		(508,480	)
Class R6		(64,624	)		(20,902	)
Class S		(61,149,449	)		(50,345,141	)
Institutional Class		(4,835,611	)		(15,259,142	)
Total distributions		(125,439,006	)		(115,820,733	)
Fund share transactions:
Proceeds from shares sold		33,373,236			109,382,603
Reinvestment of distributions		118,928,292			110,153,289
Payments for shares redeemed		(115,586,343	)		(423,375,716	)
Net increase (decrease) in net assets from Fund share transactions		36,715,185			(203,839,824	)
Increase (decrease) in net assets		15,277,816			(49,215,033	)
Net assets at beginning of period		1,467,288,385			1,516,503,418
Net assets at end of period (including undistributed net investment income of $2,288,455 and $7,738,978, respectively)	$	1,482,566,201		$	1,467,288,385

The accompanying notes are an integral part of the financial statements.

Deutsche Capital Growth Fund    17

Financial Highlights

	Six Months Ended 3/31/18				Years Ended September 30,
Class A	(Unaudited)				2017			2016			2015			2014			2013
Selected Per Share Data
Net asset value, beginning of period		$	79.22		$	71.34		$	71.63		$	79.28		$	70.56		$	60.83
Income (loss) from investment operations:
Net investment income (loss)a			.07			.29			.16			.20			.10			.60
Net realized and unrealized gain (loss)			5.44			13.10			7.46			3.29			13.31			9.63
Total from investment operations			5.51			13.39			7.62			3.49			13.41			10.23
Less distributions from:
Net investment income			(.32	)		(.17	)		(.19	)		(.10	)		(.21	)		(.50	)
Net realized gains			(6.52	)		(5.34	)		(7.72	)		(11.04	)		(4.48	)		—
Total distributions			(6.84	)		(5.51	)		(7.91	)		(11.14	)		(4.69	)		(.50	)
Net asset value, end of period		$	77.89		$	79.22		$	71.34		$	71.63		$	79.28		$	70.56
Total Return (%)b			7.07	**		20.13			11.13			4.78			19.65			16.97
Ratios to Average Net Assets and Supplemental Data
Net assets, end of period ($ millions)			612			607			573			579			604			569
Ratio of expenses (%)			.95	*		.96			.97			.97			.98			1.01
Ratio of net investment income (loss) (%)			.19	*		.40			.24			.27			.14			.94
Portfolio turnover rate (%)			14	**		17			33			44			41			31

^a  Based on average shares outstanding during the period.

^b  Total return does not reflect the effect of any sales charges.

^*  Annualized

^**  Not annualized

18    Deutsche Capital Growth Fund

	Six Months Ended 3/31/18				Years Ended September 30,
Class C	(Unaudited)				2017			2016			2015			2014			2013
Selected Per Share Data
Net asset value, beginning of period		$	69.19		$	63.34		$	64.74		$	73.12		$	65.72		$	56.65
Income (loss) from investment operations:
Net investment income (loss)a			(.22	)		(.31	)		(.36	)		(.37	)		(.46	)		.10
Net realized and unrealized gain (loss)			4.73			11.50			6.68			3.03			12.34			9.01
Total from investment operations			4.51			11.19			6.32			2.66			11.88			9.11
Less distributions from:
Net investment income			—			—			—			—			—			(.04	)
Net realized gains			(6.52	)		(5.34	)		(7.72	)		(11.04	)		(4.48	)		—
Total distributions			(6.52	)		(5.34	)		(7.72	)		(11.04	)		(4.48	)		(.04	)
Net asset value, end of period		$	67.18		$	69.19		$	63.34		$	64.74		$	73.12		$	65.72
Total Return (%)b			6.62	**		19.09			10.20			3.95			18.70			16.07
Ratios to Average Net Assets and Supplemental Data
Net assets, end of period ($ millions)			21			23			27			28			27			27
Ratio of expenses (%)			1.77	*		1.84			1.79			1.78			1.78			1.79
Ratio of net investment income (loss) (%)			(.64	)*		(.48	)		(.58	)		(.53	)		(.66	)		.17
Portfolio turnover rate (%)			14	**		17			33			44			41			31

^a  Based on average shares outstanding during the period.

^b  Total return does not reflect the effect of any sales charges.

^*  Annualized

^**  Not annualized

Deutsche Capital Growth Fund    19

	Six Months Ended 3/31/18				Years Ended September 30,
Class R	(Unaudited)				2017			2016			2015			2014			2013
Selected Per Share Data
Net asset value, beginning of period		$	78.07		$	70.48		$	70.94		$	78.80		$	70.24		$	60.62
Income (loss) from investment operations:
Net investment income (loss)a			(.09	)		(.00	)***		(.11	)		(.10	)		(.20	)		.34
Net realized and unrealized gain (loss)			5.35			12.93			7.37			3.28			13.24			9.62
Total from investment operations			5.26			12.93			7.26			3.18			13.04			9.96
Less distributions from:
Net investment income			—			—			—			—			—			(.34	)
Net realized gains			(6.52	)		(5.34	)		(7.72	)		(11.04	)		(4.48	)		—
Total distributions			(6.52	)		(5.34	)		(7.72	)		(11.04	)		(4.48	)		(.34	)
Net asset value, end of period		$	76.81		$	78.07		$	70.48		$	70.94		$	78.80		$	70.24
Total Return (%)			6.84	**		19.66			10.67			4.35			19.18			16.54
Ratios to Average Net Assets and Supplemental Data
Net assets, end of period ($ millions)			8			9			7			7			7			7
Ratio of expenses (%)			1.37	*		1.37			1.37			1.37			1.38			1.39
Ratio of net investment income (loss) (%)			(.24	)*		(.01	)		(.16	)		(.13	)		(.26	)		.54
Portfolio turnover rate (%)			14	**		17			33			44			41			31

^a  Based on average shares outstanding during the period.

^*  Annualized

^**  Not annualized

^***  Amount is less than $.005

20    Deutsche Capital Growth Fund

	Six Months Ended 3/31/18				Years Ended September 30,									Period Ended
Class R6	(Unaudited)				2017			2016			2015			9/30/14a
Selected Per Share Data
Net asset value, beginning of period		$	79.77		$	71.80		$	72.01		$	79.89		$	80.34
Income (loss) from investment operations:
Net investment income (loss)b			.22			.52			.38			.18			.08
Net realized and unrealized gain (loss)			5.45			13.17			7.48			3.40			(.53	)
Total from investment operations			5.67			13.69			7.86			3.58			(.45	)
Less distributions from:
Net investment income			(.58	)		(.38	)		(.35	)		(.42	)		—
Net realized gains			(6.52	)		(5.34	)		(7.72	)		(11.04	)		—
Total distributions			(7.10	)		(5.72	)		(8.07	)		(11.46	)		—
Net asset value, end of period		$	78.34		$	79.77		$	71.80		$	72.01		$	79.89
Total Return (%)			7.24	**		20.51			11.44			4.85			(.56	)**
Ratios to Average Net Assets and Supplemental Data
Net assets, end of period ($ millions)			1			1			.3			.01			.01
Ratio of expenses (%)			.63	*		.65			.67			.77			.60	*
Ratio of net investment income (loss) (%)			.55	*		.70			.54			.25			1.02	*
Portfolio turnover rate (%)			14	**		17			33			44			41	c

^a  For the period from August 25, 2014 (commencement of operations) to September 30, 2014.

^b  Based on average shares outstanding during the period.

^c  Represents the Fund’s portfolio turnover rate for the year ended September 30, 2014.

^*  Annualized

^**  Not annualized

Deutsche Capital Growth Fund    21

	Six Months Ended 3/31/18				Years Ended September 30,
Class S	(Unaudited)				2017			2016			2015			2014			2013
Selected Per Share Data
Net asset value, beginning of period		$	80.05		$	72.05		$	72.29		$	79.94		$	71.12		$	61.32
Income (loss) from investment operations:
Net investment income (loss)a			.18			.48			.35			.41			.30			.77
Net realized and unrealized gain (loss)			5.49			13.22			7.53			3.30			13.41			9.69
Total from investment operations			5.67			13.70			7.88			3.71			13.71			10.46
Less distributions from:
Net investment income			(.54	)		(.36	)		(.40	)		(.32	)		(.41	)		(.66	)
Net realized gains			(6.52	)		(5.34	)		(7.72	)		(11.04	)		(4.48	)		—
Total distributions			(7.06	)		(5.70	)		(8.12	)		(11.36	)		(4.89	)		(.66	)
Net asset value, end of period		$	78.66		$	80.05		$	72.05		$	72.29		$	79.94		$	71.12
Total Return (%)			7.20	**		20.43			11.42			5.04			19.97			17.29
Ratios to Average Net Assets and Supplemental Data
Net assets, end of period ($ millions)			780			771			697			693			716			649
Ratio of expenses (%)			.70	*		.71			.71			.71			.72			.75
Ratio of net investment income (loss) (%)			.44	*		.65			.49			.53			.40			1.20
Portfolio turnover rate (%)			14	**		17			33			44			41			31

^a  Based on average shares outstanding during the period.

^*  Annualized

^**  Not annualized

22    Deutsche Capital Growth Fund

	Six Months Ended 3/31/18				Years Ended September 30,
Institutional Class	(Unaudited)				2017			2016			2015			2014			2013
Selected Per Share Data
Net asset value, beginning of period		$	79.95		$	71.99		$	72.24		$	79.89		$	71.11		$	61.32
Income (loss) from investment operations:
Net investment income (loss)a			.17			.45			.35			.42			.31			.79
Net realized and unrealized gain (loss)			5.49			13.21			7.53			3.29			13.40			9.70
Total from investment operations			5.66			13.66			7.88			3.71			13.71			10.49
Less distributions from:
Net investment income			(.52	)		(.36	)		(.41	)		(.32	)		(.45	)		(.70	)
Net realized gains			(6.52	)		(5.34	)		(7.72	)		(11.04	)		(4.48	)		—
Total distributions			(7.04	)		(5.70	)		(8.13	)		(11.36	)		(4.93	)		(.70	)
Net asset value, end of period		$	78.57		$	79.95		$	71.99		$	72.24		$	79.89		$	71.11
Total Return (%)			7.20	**		20.40			11.42			5.05			19.98			17.34
Ratios to Average Net Assets and Supplemental Data
Net assets, end of period ($ millions)			61			57			213			216			197			206
Ratio of expenses (%)			.71	*		.73			.70			.70			.71			.70
Ratio of net investment income (loss) (%)			.43	*		.63			.50			.54			.40			1.23
Portfolio turnover rate (%)			14	**		17			33			44			41			31

^a  Based on average shares outstanding during the period.

^*  Annualized

^** Not annualized

Deutsche Capital Growth Fund    23

Notes to Financial Statements (Unaudited)

A. Organization and Significant Accounting Policies

Deutsche Capital Growth Fund (the “Fund”) is a diversified series of Deutsche Investment Trust (the “Trust”), which is registered under the Investment Company Act of 1940, as amended (the “1940 Act”), as an open-end management investment company organized as a Massachusetts business trust.

The Fund offers multiple classes of shares which provide investors with different purchase options. Class A shares are subject to an initial sales charge. Class C shares are not subject to an initial sales charge but are subject to higher ongoing expenses than Class A shares and a contingent deferred sales charge payable upon certain redemptions within one year of purchase. Class C shares do not automatically convert into another class. Class R shares and Class R6 shares are not subject to initial or contingent deferred sales charges and are generally available only to certain retirement plans. Class S shares are not subject to initial or contingent deferred sales charges and are only available to a limited group of investors. Institutional Class shares are not subject to initial or contingent deferred sales charges and are generally available only to qualified institutions.

Investment income, realized and unrealized gains and losses, and certain fund-level expenses and expense reductions, if any, are borne pro rata on the basis of relative net assets by the holders of all classes of shares, except that each class bears certain expenses unique to that class such as distribution and service fees, services to shareholders and certain other class-specific expenses. Differences in class-level expenses may result in payment of different per share dividends by class. All shares of the Fund have equal rights with respect to voting subject to class-specific arrangements.

The Fund’s financial statements are prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) which require the use of management estimates. Actual results could differ from those estimates. The Fund qualifies as an investment company under Topic 946 of Accounting Standards Codification of U.S. GAAP. The policies described below are followed consistently by the Fund in the preparation of its financial statements.

Security Valuation. Investments are stated at value determined as of the close of regular trading on the New York Stock Exchange on each day the exchange is open for trading.

24    Deutsche Capital Growth Fund

Various inputs are used in determining the value of the Fund’s investments. These inputs are summarized in three broad levels. Level 1 includes quoted prices in active markets for identical securities. Level 2 includes other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds and credit risk). Level 3 includes significant unobservable inputs (including the Fund’s own assumptions in determining the fair value of investments). The level assigned to the securities valuations may not be an indication of the risk or liquidity associated with investing in those securities.

Equity securities are valued at the most recent sale price or official closing price reported on the exchange (U.S. or foreign) or over-the-counter market on which they trade. Securities for which no sales are reported are valued at the calculated mean between the most recent bid and asked quotations on the relevant market or, if a mean cannot be determined, at the most recent bid quotation. Equity securities are generally categorized as Level 1.

Investments in open-end investment companies are valued at their net asset value each business day and are categorized as Level 1.

Securities and other assets for which market quotations are not readily available or for which the above valuation procedures are deemed not to reflect fair value are valued in a manner that is intended to reflect their fair value as determined in accordance with procedures approved by the Board and are generally categorized as Level 3. In accordance with the Fund’s valuation procedures, factors considered in determining value may include, but are not limited to, the type of the security; the size of the holding; the initial cost of the security; the existence of any contractual restrictions on the security’s disposition; the price and extent of public trading in similar securities of the issuer or of comparable companies; quotations or evaluated prices from broker-dealers and/or pricing services; information obtained from the issuer; analysts, and/or the appropriate stock exchange (for exchange-traded securities); an analysis of the company’s or issuer’s financial statements; an evaluation of the forces that influence the issuer and the market(s) in which the security is purchased and sold; and with respect to debt securities, the maturity, coupon, creditworthiness, currency denomination, and the movement of the market in which the security is normally traded. The value determined under these procedures may differ from published values for the same securities.

Disclosure about the classification of fair value measurements is included in a table following the Fund’s Investment Portfolio.

Securities Lending. Deutsche Bank AG as lending agent lends securities of the Fund to certain financial institutions under the terms of its

Deutsche Capital Growth Fund    25

securities lending agreement. During the term of the loans, the Fund continues to receive interest and dividends generated by the securities and to participate in any changes in their market value. The Fund requires the borrowers of the securities to maintain collateral with the Fund consisting of either cash or liquid, unencumbered assets having a value at least equal to the value of the securities loaned. When the collateral falls below specified amounts, the lending agent will use its best effort to obtain additional collateral on the next business day to meet required amounts under the securities lending agreement. As of period end, any securities on loan were collateralized by cash. During the six months ended March 31, 2018, the Fund invested the cash collateral into a joint trading account in affiliated money market funds, including Deutsche Government & Agency Securities Portfolio, managed by Deutsche Investment Management Americas Inc. Deutsche Investment Management Americas Inc. receives a management/administration fee (0.14% annualized effective rate as of March 31, 2018) on the cash collateral invested in Deutsche Government & Agency Securities Portfolio. The Fund receives compensation for lending its securities either in the form of fees or by earning interest on invested cash collateral net of borrower rebates and fees paid to a lending agent. Either the Fund or the borrower may terminate the loan at any time, and the borrower, after notice, is required to return borrowed securities within a standard time period. There may be risks of delay and costs in recovery of securities or even loss of rights in the collateral should the borrower of the securities fail financially. If the Fund is not able to recover securities lent, the Fund may sell the collateral and purchase a replacement investment in the market, incurring the risk that the value of the replacement security is greater than the value of the collateral. The Fund is also subject to all investment risks associated with the reinvestment of any cash collateral received, including, but not limited to, interest rate, credit and liquidity risk associated with such investments.

As of March 31, 2018, the Fund had no securities on loan.

Federal Income Taxes. The Fund’s policy is to comply with the requirements of the Internal Revenue Code, as amended, which are applicable to regulated investment companies, and to distribute all of its taxable income to its shareholders.

At September 30, 2017, the aggregate cost of investments for federal income tax purposes was $846,041,905. The net unrealized appreciation for all investments based on tax cost was $635,869,994. This consisted of aggregate gross unrealized appreciation for all investments in which there was an excess of value over tax cost of $657,832,566 and aggregate gross unrealized depreciation for all investments in which there was an excess of tax cost over value of $21,962,572.

26    Deutsche Capital Growth Fund

The Fund has reviewed the tax positions for the open tax years as of September 30, 2017 and has determined that no provision for income tax and/or uncertain tax positions is required in the Fund’s financial statements. The Fund’s federal tax returns for the prior three fiscal years remain open subject to examination by the Internal Revenue Service.

Distribution of Income and Gains. Distributions from net investment income of the Fund, if any, are declared and distributed to shareholders annually. Net realized gains from investment transactions, in excess of available capital loss carryforwards, would be taxable to the Fund if not distributed, and, therefore, will be distributed to shareholders at least annually. The Fund may also make additional distributions for tax purposes if necessary.

The timing and characterization of certain income and capital gain distributions are determined annually in accordance with federal tax regulations which may differ from accounting principles generally accepted in the United States of America. These differences primarily relate to certain securities sold at a loss. As a result, net investment income (loss) and net realized gain (loss) on investment transactions for a reporting period may differ significantly from distributions during such period. Accordingly, the Fund may periodically make reclassifications among certain of its capital accounts without impacting the net asset value of the Fund.

The tax character of current year distributions will be determined at the end of the current fiscal year.

Expenses. Expenses of the Trust arising in connection with a specific fund are allocated to that fund. Other Trust expenses which cannot be directly attributed to a fund are apportioned among the funds in the Trust based upon the relative net assets or other appropriate measures.

Contingencies. In the normal course of business, the Fund may enter into contracts with service providers that contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Fund that have not yet been made. However, based on experience, the Fund expects the risk of loss to be remote.

Other. Investment transactions are accounted for on a trade date plus one basis for daily net asset value calculations. However, for financial reporting purposes, investment transactions are reported on trade date. Interest income is recorded on the accrual basis. Dividend income is recorded on the ex-dividend date net of foreign withholding taxes. Realized gains and losses from investment transactions are recorded on an identified cost basis. Proceeds from litigation payments, if any, are included in net realized gain (loss) from investments.

Deutsche Capital Growth Fund    27

B. Purchases and Sales of Securities

During the six months ended March 31, 2018, purchases and sales of investment securities (excluding short-term investments) aggregated $204,267,755 and $292,965,064, respectively.

C. Related Parties

Management Agreement. Under the Investment Management Agreement with Deutsche Investment Management Americas Inc. (“DIMA” or the “Advisor”), an indirect, wholly owned subsidiary of DWS Group Gmbh & Co. KGaA (“DWS Group”), the Advisor directs the investments of the Fund in accordance with its investment objectives, policies and restrictions. The Advisor determines the securities, instruments and other contracts relating to investments to be purchased, sold or entered into by the Fund.

Under the Investment Management Agreement with the Advisor, the Fund pays a monthly management fee based on the Fund’s average daily net assets, computed and accrued daily and payable monthly, at the following annual rates:

First $250 million of the Fund’s average daily net assets	.495%
Next $750 million of such net assets	.465%
Next $1.5 billion of such net assets	.445%
Next $2.5 billion of such net assets	.425%
Next $2.5 billion of such net assets	.395%
Next $2.5 billion of such net assets	.375%
Next $2.5 billion of such net assets	.355%
Over $12.5 billion of such net assets	.335%

Accordingly, for the six months ended March 31, 2018, the fee pursuant to the Investment Management Agreement was equivalent to an annualized rate (exclusive of any applicable waivers/reimbursements) of 0.46% of the Fund’s average daily net assets.

For the period from October 1, 2017 through September 30, 2018, the Advisor has contractually agreed to waive its fees and/or reimburse certain operating expenses of the Fund to the extent necessary to maintain the total annual operating expenses (excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest) of each class as follows:

Class A	1.20%
Class C	1.95%
Class R	1.45%
Class R6	.95%
Class S	.95%
Institutional Class	.95%

28    Deutsche Capital Growth Fund

Administration Fee. Pursuant to an Administrative Services Agreement, DIMA provides most administrative services to the Fund. For all services provided under the Administrative Services Agreement, the Fund pays the Advisor an annual fee (“Administration Fee”) of 0.10% of the Fund’s average daily net assets, computed and accrued daily and payable monthly. For the six months ended March 31, 2018, the Administration Fee was $754,694, of which $129,126 is unpaid.

Service Provider Fees. DWS Service Company (“DSC”), an affiliate of the Advisor, is the transfer agent, dividend-paying agent and shareholder service agent of the Fund. Pursuant to a sub-transfer agency agreement between DSC and DST Systems, Inc. (“DST”), DSC has delegated certain transfer agent, dividend-paying agent and shareholder service agent functions to DST. DSC compensates DST out of the shareholder servicing fee it receives from the Fund. For the six months ended March 31, 2018, the amounts charged to the Fund by DSC were as follows:

Services to Shareholders	Total Aggregated		Unpaid at March 31, 2018
Class A	$	161,110	$	69,026
Class C		4,462		1,840
Class R		2,106		2,106
Class R6		89		—
Class S		214,558		83,116
Institutional Class		3,642		3,642
	$	385,967	$	159,730

Distribution and Service Fees. Under the Fund’s Class C and R 12b-1 Plans, DWS Distributors, Inc. (“DDI”), an affiliate of the Advisor, receives a fee (“Distribution Fee”) of 0.75% of average daily net assets of Class C shares and 0.25% of the average daily net assets of Class R shares. In accordance with the Fund’s Underwriting and Distribution Service Agreement, DDI enters into related selling group agreements with various firms at various rates for sales of Class C and R shares. For the six months ended March 31, 2018, the Distribution Fee was as follows:

Distribution Fee	Total Aggregated		Unpaid at March 31, 2018
Class C	$	83,365	$	13,652
Class R		10,703		1,829
	$	94,068	$	15,481

In addition, DDI provides information and administrative services for a fee (“Service Fee”) to Class A, C and R shareholders at an annual rate of up to 0.25% of average daily net assets for each such class. DDI in turn has

Deutsche Capital Growth Fund    29

various agreements with financial services firms that provide these services and pays these fees based upon the assets of shareholder accounts the firms service. For the six months ended March 31, 2018, the Service Fee was as follows:

Service Fee	Total Aggregated		Unpaid at March 31, 2018		Annualized Rate
Class A	$	715,200	$	235,786		.23	%
Class C		27,763		8,616		.25	%
Class R		10,681		3,411		.25	%
	$	753,644	$	247,813

Underwriting Agreement and Contingent Deferred Sales Charge. DDI is the principal underwriter for the Fund. Underwriting commissions paid in connection with the distribution of Class A shares for the six months ended March 31, 2018 aggregated $32,111.

In addition, DDI receives any contingent deferred sales charge (“CDSC”) from Class C share redemptions occurring within one year of purchase. There is no such charge upon redemption of any share appreciation or reinvested dividends. The CDSC is 1% of the value of the shares redeemed for Class C. For the six months ended March 31, 2018, the CDSC for Class C shares aggregated $164. A deferred sales charge of up to 1% is assessed on certain redemptions of Class A shares. For the six months ended March 31, 2018, DDI received $1,110 for Class A shares.

Typesetting and Filing Service Fees. Under an agreement with DIMA, DIMA is compensated for providing certain pre-press and regulatory filing services to the Fund. For the six months ended March 31, 2018, the amount charged to the Fund by DIMA included in the Statement of Operations under “Reports to shareholders” aggregated $8,918, of which $8,620 is unpaid.

Trustees’ Fees and Expenses. The Fund paid retainer fees to each Trustee not affiliated with the Advisor, plus specified amounts to the Board Chairperson and Vice Chairperson and to each committee Chairperson.

Affiliated Cash Management Vehicles. The Fund may invest uninvested cash balances in Deutsche Central Cash Management Government Fund and Deutsche Variable NAV Money Fund, affiliated money market funds which are managed by the Advisor. Each affiliated money market fund is managed in accordance with Rule 2a-7 under the 1940 Act, which governs the quality, maturity, diversity and liquidity of instruments in which a money market fund may invest. Deutsche Central Cash Management Government Fund seeks to maintain a stable net asset value, and Deutsche Variable NAV Money Fund maintains a floating net asset value. The Fund indirectly bears its proportionate share of the

30    Deutsche Capital Growth Fund

expenses of each affiliated money market fund in which it invests. Deutsche Central Cash Management Government Fund does not pay the Advisor an investment management fee. To the extent that Deutsche Variable NAV Money Fund pays an investment management fee to the Advisor, the Advisor will waive an amount of the investment management fee payable to the Advisor by the Fund equal to the amount of the investment management fee payable on the Fund’s assets invested in Deutsche Variable NAV Money Fund.

Security Lending Fees. Deutsche Bank AG serves as lending agent for the Fund. For the six months ended March 31, 2018, the Fund incurred lending agent fees to Deutsche Bank AG for the amount of $190.

D. Line of Credit

The Fund and other affiliated funds (the “Participants”) share in a $400 million revolving credit facility provided by a syndication of banks. The Fund may borrow for temporary or emergency purposes, including the meeting of redemption requests that otherwise might require the untimely disposition of securities. The Participants are charged an annual commitment fee, which is allocated based on net assets, among each of the Participants. Interest is calculated at a rate per annum equal to the sum of the Federal Funds Rate plus 1.25 percent plus if the one-month LIBOR exceeds the Federal Funds Rate, the amount of such excess. The Fund may borrow up to a maximum of 33 percent of its net assets under the agreement. The Fund had no outstanding loans at March 31, 2018.

E. Fund Share Transactions

The following table summarizes share and dollar activity in the Fund:

	Six Months Ended March 31, 2018					Year Ended September 30, 2017
		Shares		Dollars			Shares		Dollars
Shares sold
Class A			125,516	$	10,031,224			384,904	$	28,068,690
Class C			22,205		1,552,667			39,923		2,543,151
Class R			8,061		629,274			78,666		5,669,439
Class R6			9,215		748,115			8,726		677,691
Class S			154,504		12,413,925			615,162		44,963,192
Institutional Class			99,297		7,998,031			381,515		27,460,440
				$	33,373,236				$	109,382,603

Deutsche Capital Growth Fund    31

	Six Months Ended March 31, 2018							Year Ended September 30, 2017
		Shares			Dollars				Shares			Dollars
Shares issued to shareholders in reinvestment of distributions
Class A			635,030		$	48,827,472				611,258		$	41,162,119
Class C			26,591			1,767,738				27,585			1,633,880
Class R			6,823			518,008				7,353			489,490
Class R6			911			70,412				331			22,407
Class S			812,622			63,059,425				754,183			51,216,597
Institutional Class			60,455			4,685,237				230,377			15,628,796
					$	118,928,292						$	110,153,289
Shares redeemed
Class A			(565,188	)	$	(45,254,171	)			(1,369,352	)	$	(98,837,168	)
Class C			(65,315	)		(4,553,337	)			(159,521	)		(10,131,044	)
Class R			(16,712	)		(1,323,952	)			(67,154	)		(4,822,299	)
Class R6			(3,101	)		(253,664	)			(948	)		(73,174	)
Class S			(691,900	)		(55,919,994	)			(1,407,764	)		(102,799,136	)
Institutional Class			(102,229	)		(8,281,225	)			(2,861,718	)		(206,712,895	)
					$	(115,586,343	)					$	(423,375,716	)
Net increase (decrease)
Class A			195,358		$	13,604,525				(373,190	)	$	(29,606,359	)
Class C			(16,519	)		(1,232,932	)			(92,013	)		(5,954,013	)
Class R			(1,828	)		(176,670	)			18,865			1,336,630
Class R6			7,025			564,863				8,109			626,923
Class S			275,226			19,553,356				(38,419	)		(6,619,346	)
Institutional Class			57,523			4,402,043				(2,249,826	)		(163,623,659	)
					$	36,715,185						$	(203,839,824	)

F. Name Changes

In connection with adoption of the DWS brand, effective on or about July 2, 2018, Deutsche Investment Management Americas Inc., the Advisor, will be renamed to DWS Investment Management Americas, Inc. In addition, the “Deutsche Funds” will become known as the “DWS Funds.” As a result, Deutsche Capital Growth Fund will be renamed DWS Capital Growth Fund.

32    Deutsche Capital Growth Fund

Information About Your Fund’s Expenses

As an investor of the Fund, you incur two types of costs: ongoing expenses and transaction costs. Ongoing expenses include management fees, distribution and service (12b-1) fees and other Fund expenses. Examples of transaction costs include sales charges (loads) and account maintenance fees, which are not shown in this section. The following table is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to help you compare these expenses with the ongoing expenses of investing in other mutual funds. The example in the table is based on an investment of $1,000 invested at the beginning of the six-month period and held for the entire period (October 1, 2017 to March 31, 2018).

The tables illustrate your Fund’s expenses in two ways:

– Actual Fund Return. This helps you estimate the actual dollar amount of ongoing expenses (but not transaction costs) paid on a $1,000 investment in the Fund using the Fund’s actual return during the period. To estimate the expenses you paid over the period, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the “Expenses Paid per $1,000” line under the share class you hold.

– Hypothetical 5% Fund Return. This helps you to compare your Fund’s ongoing expenses (but not transaction costs) with those of other mutual funds using the Fund’s actual expense ratio and a hypothetical rate of return of 5% per year before expenses. Examples using a 5% hypothetical fund return may be found in the shareholder reports of other mutual funds. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period.

Please note that the expenses shown in these tables are meant to highlight your ongoing expenses only and do not reflect any transaction costs. The “Expenses Paid per $1,000” line of the tables is useful in comparing ongoing expenses only and will not help you determine the relative total expense of owning different funds. Subject to certain exceptions, an account maintenance fee of $20.00 assessed once per calendar year for Classes A, C and S shares may apply for accounts with balances less than $10,000. This fee is not included in these tables. If it was, the estimate of expenses paid for Classes A, C and S shares during the period would be higher, and account value during the period would be lower, by this amount.

Deutsche Capital Growth Fund    33

Expenses and Value of a $1,000 Investment for the six months ended March 31, 2018 (Unaudited)
Actual Fund Return	Class A		Class C		Class R		Class R6		Class S		Institutional Class
Beginning Account Value 10/1/17	$	1,000.00	$	1,000.00	$	1,000.00	$	1,000.00	$	1,000.00	$	1,000.00
Ending Account Value 3/31/18	$	1,070.70	$	1,066.20	$	1,068.40	$	1,072.40	$	1,072.00	$	1,072.00
Expenses Paid per $1,000*	$	4.90	$	9.12	$	7.06	$	3.26	$	3.62	$	3.67
Hypothetical 5% Fund Return	Class A		Class C		Class R		Class R6		Class S		Institutional Class
Beginning Account Value 10/1/17	$	1,000.00	$	1,000.00	$	1,000.00	$	1,000.00	$	1,000.00	$	1,000.00
Ending Account Value 3/31/18	$	1,020.19	$	1,016.11	$	1,018.10	$	1,021.79	$	1,021.44	$	1,021.39
Expenses Paid per $1,000*	$	4.78	$	8.90	$	6.89	$	3.18	$	3.53	$	3.58

* Expenses are equal to the Fund’s annualized expense ratio for each share class, multiplied by the average account value over the period, multiplied by 182 (the number of days in the most recent six-month period), then divided by 365.

Annualized Expense Ratios	Class A			Class C			Class R			Class R6			Class S			Institutional Class
Deutsche Capital Growth Fund		.95	%		1.77	%		1.37	%		.63	%		.70	%		.71	%

For more information, please refer to the Fund’s prospectus.

For an analysis of the fees associated with an investment in the Fund or similar funds, please refer to http://apps.finra.org/fundanalyzer/1/fa.aspx.

34    Deutsche Capital Growth Fund

Advisory Agreement Board Considerations and Fee Evaluation

The Board of Trustees (hereinafter referred to as the “Board” or “Trustees”) approved the renewal of Deutsche Capital Growth Fund’s (the “Fund”) investment management agreement (the “Agreement”) with Deutsche Investment Management Americas Inc. (“DIMA”) in September 2017.

In terms of the process that the Board followed prior to approving the Agreement, shareholders should know that:

– During the entire process, all of the Fund’s Trustees were independent of DIMA and its affiliates (the “Independent Trustees”).

– The Board met frequently during the past year to discuss fund matters and dedicated a substantial amount of time to contract review matters. Over the course of several months, the Board’s Contract Committee reviewed extensive materials received from DIMA, independent third parties and independent counsel. These materials included an analysis of the Fund’s performance, fees and expenses, and profitability from a fee consultant retained by the Fund’s Independent Trustees (the “Fee Consultant”). Based on its evaluation of the information provided, the Contract Committee presented its findings and recommendations to the Board. The Board then reviewed the Contract Committee’s findings and recommendations.

– The Board also received extensive information throughout the year regarding performance of the Fund.

– The Independent Trustees regularly met privately with counsel to discuss contract review and other matters. In addition, the Independent Trustees were advised by the Fee Consultant in the course of their review of the Fund’s contractual arrangements and considered a comprehensive report prepared by the Fee Consultant in connection with their deliberations.

In connection with reviewing the Agreement, the Board also reviewed the terms of the Fund’s Rule 12b-1 plan, distribution agreement, administrative services agreement, transfer agency agreement and other material service agreements.

In connection with the contract review process, the Contract Committee and the Board considered the factors discussed below, among others. The Board also considered that DIMA and its predecessors have managed the Fund since its inception, and the Board believes that a long-term relationship with a capable, conscientious advisor is in the best interests

Deutsche Capital Growth Fund    35

of the Fund. The Board considered, generally, that shareholders chose to invest or remain invested in the Fund knowing that DIMA managed the Fund, and that the Agreement was approved by the Fund’s shareholders. DIMA is part of Deutsche Bank AG’s (“Deutsche Bank”) Asset Management (“Deutsche AM”) division. Deutsche AM is a global asset management business that offers a wide range of investing expertise and resources, including research capabilities in many countries throughout the world.

As part of the contract review process, the Board carefully considered the fees and expenses of each Deutsche fund overseen by the Board in light of the fund’s performance. In many cases, this led to the negotiation and implementation of expense caps. As part of these negotiations, the Board indicated that it would consider relaxing these caps in future years following sustained improvements in performance, among other considerations.

While shareholders may focus primarily on fund performance and fees, the Fund’s Board considers these and many other factors, including the quality and integrity of DIMA’s personnel and administrative support services provided by DIMA, such as back-office operations, fund valuations, and compliance policies and procedures.

Nature, Quality and Extent of Services. The Board considered the terms of the Agreement, including the scope of advisory services provided under the Agreement. The Board noted that, under the Agreement, DIMA provides portfolio management services to the Fund and that, pursuant to a separate administrative services agreement, DIMA provides administrative services to the Fund. The Board considered the experience and skills of senior management and investment personnel and the resources made available to such personnel. The Board reviewed the Fund’s performance over short-term and long-term periods and compared those returns to various agreed-upon performance measures, including market index(es) and a peer universe compiled using information supplied by Morningstar Direct (“Morningstar”), an independent fund data service. The Board also noted that it has put into place a process of identifying “Funds in Review” (e.g., funds performing poorly relative to a peer universe), and receives additional reporting from DIMA regarding such funds and, where appropriate, DIMA’s plans to address underperformance. The Board believes this process is an effective manner of identifying and addressing underperforming funds. Based on the information provided, the Board noted that, for the one-, three- and five-year periods ended December 31, 2016, the Fund’s performance (Class A shares) was in the 2nd quartile, 1st quartile and 1st quartile, respectively, of the applicable Morningstar universe (the 1st quartile being the best performers and the 4th quartile being the worst performers). The Board also observed that the Fund has underperformed its benchmark in the one-, three- and five-year periods ended December 31, 2016.

36    Deutsche Capital Growth Fund

Fees and Expenses. The Board considered the Fund’s investment management fee schedule, operating expenses and total expense ratios, and comparative information provided by Broadridge Financial Solutions, Inc. (“Broadridge”) and the Fee Consultant regarding investment management fee rates paid to other investment advisors by similar funds (1st quartile being the most favorable and 4th quartile being the least favorable). With respect to management fees paid to other investment advisors by similar funds, the Board noted that the contractual fee rates paid by the Fund, which include a 0.10% fee paid to DIMA under the Fund’s administrative services agreement, were lower than the median (1st quartile) of the applicable Broadridge peer group (based on Broadridge data provided as of December 31, 2016). The Board noted that the Fund’s Class A shares total (net) operating expenses (excluding 12b-1 fees) were expected to be lower than the median (1st quartile) of the applicable Broadridge expense universe (based on Broadridge data provided as of December 31, 2016, and analyzing Broadridge expense universe Class A (net) expenses less any applicable 12b-1 fees) (“Broadridge Universe Expenses”). The Board also reviewed data comparing each share class’s total (net) operating expenses to the applicable Broadridge Universe Expenses. The Board noted that the expense limitations agreed to by DIMA were expected to help the Fund’s total (net) operating expenses remain competitive. The Board considered the Fund’s management fee rate as compared to fees charged by DIMA to comparable Deutsche U.S. registered funds (“Deutsche Funds”) and considered differences between the Fund and the comparable Deutsche Funds. The information requested by the Board as part of its review of fees and expenses also included information about institutional accounts (including any sub-advised funds and accounts) and funds offered primarily to European investors (“Deutsche Europe funds”) managed by Deutsche AM. The Board noted that DIMA indicated that Deutsche AM does not manage any institutional accounts or Deutsche Europe funds comparable to the Fund.

On the basis of the information provided, the Board concluded that management fees were reasonable and appropriate in light of the nature, quality and extent of services provided by DIMA.

Profitability. The Board reviewed detailed information regarding revenues received by DIMA under the Agreement. The Board considered the estimated costs to DIMA, and pre-tax profits realized by DIMA, from advising the Deutsche Funds, as well as estimates of the pre-tax profits attributable to managing the Fund in particular. The Board also received information regarding the estimated enterprise-wide profitability of DIMA and its affiliates with respect to all fund services in totality and by fund. The Board and the Fee Consultant reviewed DIMA’s methodology in allocating its costs to the management of the Fund. Based on the

Deutsche Capital Growth Fund    37

information provided, the Board concluded that the pre-tax profits realized by DIMA in connection with the management of the Fund were not unreasonable. The Board also reviewed certain publicly available information regarding the profitability of certain similar investment management firms. The Board noted that, while information regarding the profitability of such firms is limited (and in some cases is not necessarily prepared on a comparable basis), DIMA and its affiliates’ overall profitability with respect to the Deutsche Funds (after taking into account distribution and other services provided to the funds by DIMA and its affiliates) was lower than the overall profitability levels of most comparable firms for which such data was available.

Economies of Scale. The Board considered whether there are economies of scale with respect to the management of the Fund and whether the Fund benefits from any economies of scale. The Board noted that the Fund’s investment management fee schedule includes fee breakpoints. The Board concluded that the Fund’s fee schedule represents an appropriate sharing between the Fund and DIMA of such economies of scale as may exist in the management of the Fund at current asset levels.

Other Benefits to DIMA and Its Affiliates. The Board also considered the character and amount of other incidental benefits received by DIMA and its affiliates, including any fees received by DIMA for administrative services provided to the Fund, any fees received by an affiliate of DIMA for transfer agency services provided to the Fund and any fees received by an affiliate of DIMA for distribution services. The Board also considered benefits to DIMA related to brokerage and soft-dollar allocations, including allocating brokerage to pay for research generated by parties other than the executing broker dealers, which pertain primarily to funds investing in equity securities. In addition, the Board considered the incidental public relations benefits to DIMA related to Deutsche Funds advertising and cross-selling opportunities among DIMA products and services. The Board considered these benefits in reaching its conclusion that the Fund’s management fees were reasonable.

Compliance. The Board considered the significant attention and resources dedicated by DIMA to documenting and enhancing its compliance processes in recent years. The Board noted in particular (i) the experience, seniority and time commitment of the individuals serving as DIMA’s and the Fund’s chief compliance officers; (ii) the large number of DIMA compliance personnel; and (iii) the substantial commitment of resources by DIMA and its affiliates to compliance matters.

Based on all of the information considered and the conclusions reached, the Board unanimously determined that the continuation of the Agreement is in the best interests of the Fund. In making this determination, the Board did not give particular weight to any single factor

38    Deutsche Capital Growth Fund

identified above. The Board considered these factors over the course of numerous meetings, certain of which were in executive session with only the Independent Trustees and counsel present. It is possible that individual Independent Trustees may have weighed these factors differently in reaching their individual decisions to approve the continuation of the Agreement.

Deutsche Capital Growth Fund    39

Account Management Resources

For More Information	The automated telephone system allows you to access personalized account information and obtain information on other Deutsche funds using either your voice or your telephone keypad. Certain account types within Classes A, C and S also have the ability to purchase, exchange or redeem shares using this system. For more information, contact your financial advisor. You may also access our automated telephone system or speak with a Shareholder Service representative by calling: (800) 728-3337
Web Site	dws.com View your account transactions and balances, trade shares, monitor your asset allocation, subscribe to fund and account updates by e-mail, and change your address, 24 hours a day. Obtain prospectuses and applications, news about Deutsche funds, insight from DWS economists and investment specialists and access to Deutsche fund account information.
Written Correspondence	DWS PO Box 219151 Kansas City, MO 64121-9151
Proxy Voting	The Fund’s policies and procedures for voting proxies for portfolio securities and information about how the Fund voted proxies related to its portfolio securities during the most recent 12-month period ended June 30 are available on our Web site — dws.com/en-us/resources/proxy-voting — or on the SEC’s Web site — sec.gov. To obtain a written copy of the Fund’s policies and procedures without charge, upon request, call us toll free at (800) 728-3337.
Portfolio Holdings	Following the Fund’s fiscal first and third quarter-end, a complete portfolio holdings listing is filed with the SEC on Form N-Q. This form will be available on the SEC’s Web site at sec.gov, and it also may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. Information on the operation of the SEC’s Public Reference Room may be obtained by calling (800) SEC-0330. The Fund’s portfolio holdings are also posted on dws.com from time to time. Please see the Fund’s current prospectus for more information.
Principal Underwriter	If you have questions, comments or complaints, contact: DWS Distributors, Inc. 222 South Riverside Plaza Chicago, IL 60606-5808 (800) 621-1148

40    Deutsche Capital Growth Fund

Investment Management	Deutsche Investment Management Americas Inc. (“DIMA” or the “Advisor”), which is part of DWS Group, is the investment advisor for the Fund. DIMA and its predecessors have more than 90 years of experience managing mutual funds and DIMA provides a full range of investment advisory services to both institutional and retail clients. DIMA is an indirect, wholly owned subsidiary of DWS Group. DWS Group is a global organization that offers a wide range of investing expertise and resources, including hundreds of portfolio managers and analysts and an office network that reaches the world’s major investment centers. This well-resourced global investment platform brings together a wide variety of experience and investment insight across industries, regions, asset classes and investing styles.
	Class A	Class C	Class S	Institutional Class
Nasdaq Symbol	SDGAX	SDGCX	SCGSX	SDGTX
CUSIP Number	25157M 109	25157M 307	25157M 406	25157M 760
Fund Number	498	798	2398	564
For shareholders of Class R and Class R6
Automated Information Line	DWS/Ascensus Plan Access (800) 728-3337 24-hour access to your retirement plan account.
Web Site	dws.com Obtain prospectuses and applications, news about Deutsche funds, insight from DWS economists and investment specialists and access to Deutsche fund account information. Log in/register to manage retirement account assets at https://www.mykplan.com/participantsecure_net/login.aspx.
For More Information	(800) 728-3337 To speak with a service representative.
Written Correspondence	DWS Service Company 222 South Riverside Plaza Chicago, IL 60606-5806
	Class R		Class R6
Nasdaq Symbol	SDGRX		SDGZX
CUSIP Number	25157M 851		25157M 620
Fund Number	1508		1698

Deutsche Capital Growth Fund    41

Privacy Statement

FACTS	What Does DWS Do With Your Personal Information?
Why?	Financial companies choose how they share your personal information. Federal law gives consumers the right to limit some but not all sharing. Federal law also requires us to tell you how we collect, share and protect your personal information. Please read this notice carefully to understand what we do.
What?	The types of personal information we collect and share can include: – Social Security number – Account balances – Purchase and transaction history – Bank account information – Contact information such as mailing address, e-mail address and telephone number
How?	All financial companies need to share customers’ personal information to run their everyday business. In the section below, we list the reasons financial companies can share their customers’ personal information, the reasons DWS chooses to share and whether you can limit this sharing.

Reasons we can share your personal information	Does DWS share?	Can you limit this sharing?
For our everyday business purposes — such as to process your transactions, maintain your account(s), respond to court orders or legal investigations	Yes	No
For our marketing purposes — to offer our products and services to you	Yes	No
For joint marketing with other financial companies	No	We do not share
For our affiliates’ everyday business purposes — information about your transactions and experiences	No	We do not share
For our affiliates’ everyday business purposes — information about your creditworthiness	No	We do not share
For non-affiliates to market to you	No	We do not share

Questions? Call (800) 728-3337 or e-mail us at service@dws.com

42    Deutsche Capital Growth Fund

Who we are
Who is providing this notice?	DWS Distributors, Inc; Deutsche Investment Management Americas Inc.; Deutsche AM Trust Company; the Deutsche Funds
What we do
How does DWS protect my personal information?	To protect your personal information from unauthorized access and use, we use security measures that comply with federal law. These measures include computer safeguards and secured files and buildings.
How does DWS collect my personal information?	We collect your personal information, for example, when you: – open an account – give us your contact information – provide bank account information for ACH or wire transactions – tell us where to send money – seek advice about your investments
Why can’t I limit all sharing?	Federal law gives you the right to limit only – sharing for affiliates’ everyday business purposes – information about your creditworthiness – affiliates from using your information to market to you – sharing for non-affiliates to market to you State laws and individual companies may give you additional rights to limit sharing.
Definitions
Affiliates	Companies related by common ownership or control. They can be financial or non-financial companies. Our affiliates include financial companies with the DWS or Deutsche Bank (“DB”) name, such as DB AG Frankfurt.
Non-affiliates	Companies not related by common ownership or control. They can be financial and non-financial companies. Non-affiliates we share with include account service providers, service quality monitoring services, mailing service providers and verification services to help in the fight against money laundering and fraud.
Joint marketing	A formal agreement between non-affiliated financial companies that together market financial products or services to you. DWS does not jointly market.

Rev. 3/2018

Deutsche Capital Growth Fund    43

DCGF-3

(R-027137-7 5/18

ITEM 2.	CODE OF ETHICS
	Not applicable.
ITEM 3.	AUDIT COMMITTEE FINANCIAL EXPERT
	Not applicable
ITEM 4.	PRINCIPAL ACCOUNTANT FEES AND SERVICES
	Not applicable
ITEM 5.	AUDIT COMMITTEE OF LISTED REGISTRANTS
	Not applicable
ITEM 6.	SCHEDULE OF INVESTMENTS
	Not applicable
ITEM 7.	DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES
	Not applicable
ITEM 8.	PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES
	Not applicable
ITEM 9.	PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS
	Not applicable
ITEM 10.	SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
	There were no material changes to the procedures by which shareholders may recommend nominees to the Fund’s Board.  The primary function of the Nominating and Governance Committee is to identify and recommend individuals for membership on the Board and oversee the administration of the Board Governance Guidelines. Shareholders may recommend candidates for Board positions by forwarding their correspondence by U.S. mail or courier service to Keith R. Fox, Deutsche Funds Board Chair, c/o Thomas R. Hiller, Ropes & Gray LLP, Prudential Tower, 800 Boylston Street, Boston, MA 02199-3600.
ITEM 11.	CONTROLS AND PROCEDURES
	(a)	The Chief Executive and Financial Officers concluded that the Registrant’s Disclosure Controls and Procedures are effective based on the evaluation of the Disclosure Controls and Procedures as of a date within 90 days of the filing date of this report.
	(b)	There have been no changes in the registrant’s internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal controls over financial reporting.
ITEM 12.	Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.
	Not applicable
ITEM 13.	EXHIBITS
	(a)(1)	Not applicable
	(a)(2)	Certification pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) is filed and attached hereto as Exhibit 99.CERT.
	(b)	Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) is furnished and attached hereto as Exhibit 99.906CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Registrant:	Deutsche Capital Growth Fund, a series of Deutsche Investment Trust
By:	/s/Hepsen Uzcan Hepsen Uzcan President
Date:	5/30/2018

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/Hepsen Uzcan Hepsen Uzcan President
Date:	5/30/2018
By:	/s/Diane Kenneally Diane Kenneally Chief Financial Officer
Date:	5/30/2018

EX-99.CERT

President

Form N-CSRS Certification under Sarbanes Oxley Act

I, Hepsen Uzcan, certify that:

1)	I have reviewed this report, filed on behalf of Deutsche Capital Growth Fund, a series of Deutsche Investment Trust, on Form N-CSRS;
2)	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3)	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;
4)	The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:
	a)	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)	Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and
	d)	Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and
5)	The registrant's other certifying officer(s) and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):
	a)	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize, and report financial information; and
	b)	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

5/30/2018	/s/Hepsen Uzcan
	Hepsen Uzcan
	President

Chief Financial Officer

Form N-CSRS Certification under Sarbanes Oxley Act

I, Diane Kenneally, certify that:

1)	I have reviewed this report, filed on behalf of Deutsche Capital Growth Fund, a series of Deutsche Investment Trust, on Form N-CSRS;
2)	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3)	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;
4)	The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:
	a)	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
	b)	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
	c)	Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and
	d)	Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and
5)	The registrant's other certifying officer(s) and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):
	a)	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize, and report financial information; and
	b)	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting

5/30/2018	/s/Diane Kenneally
	Diane Kenneally
	Chief Financial Officer

EX-99.906 CERT

President

Section 906 Certification under Sarbanes Oxley Act

I, Hepsen Uzcan, certify that:

1.	I have reviewed this report, filed on behalf of Deutsche Capital Growth Fund, a series of Deutsche Investment Trust, on Form N-CSRS;
2.	Based on my knowledge and pursuant to 18 U.S.C. § 1350, the periodic report on Form N-CSRS (the “Report”) fully complies with the requirements of § 13 (a) or § 15 (d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

5/30/2018	/s/Hepsen Uzcan
	Hepsen Uzcan
	President

Chief Financial Officer

Section 906 Certification under Sarbanes Oxley Act

I, Diane Kenneally, certify that:

1.	I have reviewed this report, filed on behalf of Deutsche Capital Growth Fund, a series of Deutsche Investment Trust, on Form N-CSRS;
2.	Based on my knowledge and pursuant to 18 U.S.C. § 1350, the periodic report on Form N-CSRS (the “Report”) fully complies with the requirements of § 13 (a) or § 15 (d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

5/30/2018	/s/Diane Kenneally
	Diane Kenneally
	Chief Financial Officer