UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-22883

ARK ETF Trust
(Exact name of registrant as specified in charter)

c/o ARK Investment Management LLC

3 East 28^th Street, 7^th Street
New York, NY 10016
(Address of principal executive offices) (Zip code)

Corporation Service Company

2711 Centerville Road

Suite 400

Wilmington, DE 19808
(Name and address of agent for service)

Registrant's telephone number, including area code: (212) 426-7040

Date of fiscal year end: July 31

Date of reporting period: April 30, 2019

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments.

The Schedule(s) of Investments is attached herewith.

Schedule of Investments

ARK Fintech Innovation ETF

April 30, 2019 (Unaudited)

Investments	Shares		Value
COMMON STOCKS–99.6%
Banks - 1.0%
HDFC Bank Ltd. (India)(a)		5,858	$	671,620
Capital Markets - 6.9%
Charles Schwab Corp. (The)		14,745		675,026
Interactive Brokers Group, Inc., Class A		16,605		900,655
Intercontinental Exchange, Inc.		11,820		961,557
Nasdaq, Inc.		6,612		609,627
SBI Holdings, Inc. (Japan)		63,800		1,359,104
Total Capital Markets				4,505,969
Consumer Finance - 2.4%
LendingClub Corp.*		506,740		1,611,433
Diversified Financial Services - 1.0%
FirstRand Ltd. (South Africa)		138,371		656,887
Health Care Technology - 2.8%
Medidata Solutions, Inc.*		20,047		1,811,046
Insurance - 2.3%
ZhongAn Online P&C Insurance Co. Ltd., Class H (China)*(b)		423,400		1,527,409
Interactive Media & Services - 19.5%
Baidu, Inc. (China)*(a)		13,632		2,266,047
Eventbrite, Inc., Class A*		32,507		812,675
LINE Corp. (Japan)*		51,480		1,726,090
Tencent Holdings Ltd. (China)(a)		85,675		4,218,637
Twitter, Inc.*		33,565		1,339,579
Zillow Group, Inc., Class C*		72,212		2,411,881
Total Interactive Media & Services				12,774,909
Internet & Direct Marketing Retail - 16.0%
Alibaba Group Holding Ltd. (China)*(a)		11,622		2,156,695
Amazon.com, Inc.*		1,563		3,011,151
Meituan Dianping, Class B (China)*		185,600		1,348,562
MercadoLibre, Inc. (Argentina)*		2,624		1,270,383
Pinduoduo, Inc. (China)*(a)		40,050		890,311
Rakuten, Inc. (Japan)		162,400		1,800,476
Total Internet & Direct Marketing Retail				10,477,578
IT Services - 18.6%
Adyen NV (Netherlands)*(b)		1,266		1,030,317
PayPal Holdings, Inc.*		23,970		2,703,097
Shopify, Inc., Class A (Canada)*		4,655		1,133,632
Square, Inc., Class A*		74,466		5,422,614
Twilio, Inc., Class A*		5,376		737,265
Wirecard AG (Germany)		7,681		1,151,831
Total IT Services				12,178,756
Professional Services - 3.2%
TransUnion		10,929		761,205
Verisk Analytics, Inc.		9,481		1,338,148
Total Professional Services				2,099,353
Semiconductors & Semiconductor Equipment - 4.5%
NVIDIA Corp.		10,617		1,921,677
Taiwan Semiconductor Manufacturing Co. Ltd. (Taiwan)(a)		23,275		1,019,911
Total Semiconductors & Semiconductor Equipment				2,941,588
Software - 9.7%
Guidewire Software, Inc.*		14,395		1,533,068
Intuit, Inc.		5,068		1,272,372
salesforce.com, Inc.*		10,437		1,725,758
Splunk, Inc.*		13,284		1,833,723
Total Software				6,364,921
Technology Hardware, Storage & Peripherals - 5.5%
Apple, Inc.		18,156		3,643,365
Thrifts & Mortgage Finance - 6.2%
LendingTree, Inc.*		10,515		4,046,382
Total Common Stocks
(Cost $59,321,925)				65,311,216
MONEY MARKET FUND–0.4%
Morgan Stanley Institutional Liquidity Fund - Government Portfolio, 2.34% (c)
(Cost $241,599)		241,599		241,599
Total Investments–100.0%
(Cost $59,563,524)				65,552,815
Other Assets in Excess of Liabilities–0.0%(d)				6,540
Net Assets–100.0%			$	65,559,355

*	Non-income producing security
(a)	American Depositary Receipt
(b)	Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers.
(c)	Rate shown represents annualized 7-day yield as of April 30, 2019.
(d)	Less than 0.05%

Fair Value Measurement

The Fund discloses the fair value of its investments in a hierarchy that distinguishes between: (i) market participant assumptions developed based on market data obtained from sources independent of the Fund (observable inputs) and (ii) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the hierarchy are as follows:

• Level 1 — Quoted prices in active markets for identical assets.

• Level 2 — Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

• Level 3 — Significant unobservable inputs (including each Fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the valuations as of April 30, 2019, based upon the three levels defined above:

ARK Fintech Innovation ETF	Level 1		Level 2		Level 3		Total
Assets
Common Stocks*	$	65,311,216	$	–	$	–	$	65,311,216
Money Market Fund		241,599		–		–		241,599
Total	$	65,552,815	$	–	$	–	$	65,552,815

* Please refer to the Schedule of Investments to view securities segregated by industry type.

See accompanying Notes to Quarterly Schedule of Investments.

Schedule of Investments

ARK Genomic Revolution ETF

April 30, 2019 (Unaudited)

Investments	Shares		Value
COMMON STOCKS–99.6%
Biotechnology - 64.7%
AquaBounty Technologies, Inc.*		367,551	$	815,963
Arcturus Therapeutics Ltd.*†		1,015,947		7,711,038
Bellicum Pharmaceuticals, Inc.*		1,511,787		4,610,950
Bluebird Bio, Inc.*		105,072		14,902,362
Celgene Corp.*		28		2,651
Cellectis SA (France)*(a)		826,711		16,319,275
Cellular Biomedicine Group, Inc.*		318,000		5,495,040
CRISPR Therapeutics AG (Switzerland)*		579,450		23,288,096
Editas Medicine, Inc.*		1,146,592		28,378,152
Evogene Ltd. (Israel)*		205,330		422,980
Fate Therapeutics, Inc.*		121,409		2,039,671
Incyte Corp.*		132,243		10,156,262
Inovio Pharmaceuticals, Inc.*		3,417,798		12,850,920
Intellia Therapeutics, Inc.*		1,861,868		28,635,530
Invitae Corp.*		1,712,571		40,450,927
Ionis Pharmaceuticals, Inc.*		159,591		11,862,399
Iovance Biotherapeutics, Inc.*		757,734		8,638,168
Organovo Holdings, Inc.*		5,239,625		5,239,625
Pluristem Therapeutics, Inc.*		5,216,105		3,233,464
Regeneron Pharmaceuticals, Inc.*		20,882		7,165,449
Rubius Therapeutics, Inc.*		488,374		8,541,661
Seres Therapeutics, Inc.*		1,430,794		9,357,393
Syros Pharmaceuticals, Inc.*		874,421		6,322,064
Twist Bioscience Corp.*		81,842		1,936,382
Veracyte, Inc.*		855,461		19,564,393
Total Biotechnology				277,940,815
Health Care Equipment & Supplies - 1.9%
Cerus Corp.*		1,306,680		8,009,948
Health Care Technology - 7.5%
Medidata Solutions, Inc.*		223,260		20,169,308
Teladoc Health, Inc.*		215,919		12,281,473
Total Health Care Technology				32,450,781
Life Sciences Tools & Services - 18.6%
Codexis, Inc.*		332,953		6,559,174
Compugen Ltd. (Israel)*†		2,998,693		10,495,425
Illumina, Inc.*		139,169		43,420,728
NanoString Technologies, Inc.*		746,511		19,386,891
Total Life Sciences Tools & Services				79,862,218
Pharmaceuticals - 3.1%
Bristol-Myers Squibb Co.		283,816		13,177,577
Semiconductors & Semiconductor Equipment - 2.2%
NVIDIA Corp.		52,226		9,452,906
Technology Hardware, Storage & Peripherals - 1.6%
Apple, Inc.		34,572		6,937,563
Total Common Stocks
(Cost $397,034,755)				427,831,808
MONEY MARKET FUND–0.4%
Morgan Stanley Institutional Liquidity Fund - Government Portfolio, 2.34% (b)
(Cost $1,890,827)		1,890,827		1,890,827
Total Investments–100.0%
(Cost $398,925,582)				429,722,635
Liabilities in Excess of Other Assets–(0.0)%(c)				(​162,507)
Net Assets–100.0%			$	429,560,128

Affiliated Issuer Transactions

A summary of the Fund’s transactions with affiliated investments during the period ended April 30, 2019 is as follows:

Value ($) at 7/31/2018	Purchases Cost ($)		Sales Proceeds ($)			Net Realized Gain/(Loss) ($)			Net Change in Unrealized Appreciation (Depreciation) ($)			Dividend Income ($)		Capital Gain Distributions ($)		Number of Shares at 4/30/2019		Value ($) at 4/30/2019
Common Stock — 4.2%
Biotechnology — 1.8%
Arcturus Therapeutics Ltd.  †
4,728,432		3,641,456		(544,834	)		11,135			(125,151	)		–		–		1,015,947		7,711,038
Life Sciences Tools & Services — 2.4%
Compugen Ltd.  †
5,571,037		5,835,678		(1,227,968	)		(15,945	)		332,623			–		–		2,998,693		10,495,425
10,299,469		9,477,134		(1,772,802	)		(4,810	)		207,472			–		–		4,014,640		18,206,463

*	Non-income producing security
†	Affiliated security
(a)	American Depositary Receipt
(b)	Rate shown represents annualized 7-day yield as of April 30, 2019.
(c)	Less than 0.05%

Fair Value Measurement

The Fund discloses the fair value of its investments in a hierarchy that distinguishes between: (i) market participant assumptions developed based on market data obtained from sources independent of the Fund (observable inputs) and (ii) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the hierarchy are as follows:

• Level 1 — Quoted prices in active markets for identical assets.

• Level 2 — Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

• Level 3 — Significant unobservable inputs (including each Fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the valuations as of April 30, 2019, based upon the three levels defined above:

ARK Genomic Revolution ETF	Level 1		Level 2		Level 3		Total
Assets
Common Stocks*	$	427,831,808	$	–	$	–	$	427,831,808
Money Market Fund		1,890,827		–		–		1,890,827
Total	$	429,722,635	$	–	$	–	$	429,722,635

* Please refer to the Schedule of Investments to view securities segregated by industry type.

See accompanying Notes to Quarterly Schedule of Investments. 

Schedule of Investments

ARK Industrial Innovation ETF

April 30, 2019 (Unaudited)

Investments	Shares		Value
COMMON STOCKS–99.8%
Aerospace & Defense - 5.4%
Aerovironment, Inc.*		75,758	$	5,193,968
Elbit Systems Ltd. (Israel)		15,624		2,182,829
Kratos Defense & Security Solutions, Inc.*		136,624		2,169,589
Total Aerospace & Defense				9,546,386
Auto Components - 5.1%
Aptiv PLC		83,276		7,136,753
Magna International, Inc. (Canada)		34,321		1,909,621
Total Auto Components				9,046,374
Automobiles - 11.2%
General Motors Co.		45,449		1,770,238
Tesla, Inc.*		75,178		17,944,237
Total Automobiles				19,714,475
Biotechnology - 1.1%
Organovo Holdings, Inc.*		1,838,198		1,838,198
Electronic Equipment, Instruments & Components - 5.0%
Cognex Corp.		71,574		3,609,477
Trimble, Inc.*		128,981		5,265,004
Total Electronic Equipment, Instruments & Components				8,874,481
Health Care Equipment & Supplies - 4.2%
Align Technology, Inc.*		14,073		4,569,222
Intuitive Surgical, Inc.*		5,434		2,774,763
Total Health Care Equipment & Supplies				7,343,985
Interactive Media & Services - 13.1%
Alphabet, Inc., Class C*		2,550		3,030,624
Baidu, Inc. (China)*(a)		95,911		15,943,286
Tencent Holdings Ltd. (China)(a)		85,197		4,195,100
Total Interactive Media & Services				23,169,010
Internet & Direct Marketing Retail - 3.8%
Amazon.com, Inc.*		2,208		4,253,756
Rakuten, Inc. (Japan)(a)		224,686		2,520,977
Total Internet & Direct Marketing Retail				6,774,733
Machinery - 7.5%
Deere & Co.		12,727		2,107,973
ExOne Co. (The)*		376,255		3,333,619
Proto Labs, Inc.*		70,765		7,769,290
Total Machinery				13,210,882
Semiconductors & Semiconductor Equipment - 18.3%
NVIDIA Corp.		92,589		16,758,609
NXP Semiconductors NV (Netherlands)		21,027		2,220,872
Taiwan Semiconductor Manufacturing Co. Ltd. (Taiwan)(a)		41,233		1,806,830
Teradyne, Inc.		172,211		8,438,339
Xilinx, Inc.		25,431		3,055,280
Total Semiconductors & Semiconductor Equipment				32,279,930
Software - 12.8%
2U, Inc.*		66,173		4,003,466
ANSYS, Inc.*		10,561		2,067,844
Autodesk, Inc.*		23,118		4,119,859
Materialise NV (Belgium)*(a)		523,639		8,723,826
Splunk, Inc.*		26,455		3,651,848
Total Software				22,566,843
Technology Hardware, Storage & Peripherals - 12.3%
Apple, Inc.		17,857		3,583,364
Nano Dimension Ltd. (Israel)*(a)		796,458		586,193
Stratasys Ltd.*		757,530		17,612,573
Total Technology Hardware, Storage & Peripherals				21,782,130
Total Common Stocks
(Cost $162,707,271)				176,147,427
MONEY MARKET FUND–0.3%
Morgan Stanley Institutional Liquidity Fund - Government Portfolio, 2.34% (b)
(Cost $543,928)		543,928		543,928
Total Investments–100.1%
(Cost $163,251,199)				176,691,355
Liabilities in Excess of Other Assets–(0.1)%				(​97,866)
Net Assets–100.0%			$	176,593,489

*	Non-income producing security
(a)	American Depositary Receipt
(b)	Rate shown represents annualized 7-day yield as of April 30, 2019.

Fair Value Measurement

The Fund discloses the fair value of its investments in a hierarchy that distinguishes between: (i) market participant assumptions developed based on market data obtained from sources independent of the Fund (observable inputs) and (ii) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the hierarchy are as follows:

• Level 1 — Quoted prices in active markets for identical assets.

• Level 2 — Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

• Level 3 — Significant unobservable inputs (including each Fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the valuations as of April 30, 2019, based upon the three levels defined above:

ARK Industrial Innovation ETF	Level 1		Level 2		Level 3		Total
Assets
Common Stocks*	$	176,147,427	$	–	$	–	$	176,147,427
Money Market Fund		543,928		–		–		543,928
Total	$	176,691,355	$	–	$	–	$	176,691,355

* Please refer to the Schedule of Investments to view securities segregated by industry type.

See accompanying Notes to Quarterly Schedule of Investments.

Schedule of Investments

ARK Innovation ETF

April 30, 2019 (Unaudited)

Investments	Shares		Value
COMMON STOCKS–100.0%
Automobiles - 10.1%
Tesla, Inc.*		708,349	$	169,075,823
Biotechnology - 22.9%
Cellectis SA (France)*(a)		62,590		1,235,527
CRISPR Therapeutics AG (Switzerland)*		1,337,278		53,745,203
Editas Medicine, Inc.*		2,355,998		58,310,950
Intellia Therapeutics, Inc.*†		4,753,739		73,112,506
Invitae Corp.*†		4,737,886		111,908,867
Organovo Holdings, Inc.*†		11,393,154		11,393,154
Seres Therapeutics, Inc.*†		3,046,105		19,921,526
Syros Pharmaceuticals, Inc.*†		2,237,286		16,175,578
Veracyte, Inc.*		1,656,747		37,889,804
Total Biotechnology				383,693,115
Consumer Finance - 2.3%
LendingClub Corp.*		11,892,605		37,818,484
Entertainment - 3.9%
Netflix, Inc.*		68,188		25,266,381
Spotify Technology SA*		292,254		39,679,326
Total Entertainment				64,945,707
Health Care Equipment & Supplies - 1.7%
Cerus Corp.*		4,721,421		28,942,311
Health Care Technology - 3.3%
Medidata Solutions, Inc.*		369,680		33,396,891
Teladoc Health, Inc.*		381,673		21,709,560
Total Health Care Technology				55,106,451
Interactive Media & Services - 15.6%
Baidu, Inc. (China)*(a)		471,835		78,433,132
Eventbrite, Inc., Class A*		689,791		17,244,775
Tencent Holdings Ltd. (China)(a)		898,490		44,241,648
Twitter, Inc.*		2,157,909		86,122,148
Zillow Group, Inc., Class C*		1,050,175		35,075,845
Total Interactive Media & Services				261,117,548
IT Services - 5.0%
Square, Inc., Class A*		1,138,299		82,890,933
Life Sciences Tools & Services - 10.8%
Compugen Ltd. (Israel)*†		5,094,810		17,831,835
Illumina, Inc.*		303,721		94,760,952
NanoString Technologies, Inc.*†		2,636,172		68,461,387
Total Life Sciences Tools & Services				181,054,174
Machinery - 1.9%
ExOne Co. (The)*†		1,165,245		10,324,071
Proto Labs, Inc.*		202,529		22,235,659
Total Machinery				32,559,730
Semiconductors & Semiconductor Equipment - 7.5%
NVIDIA Corp.		436,668		79,036,908
Teradyne, Inc.		786,196		38,523,604
Xilinx, Inc.		70,946		8,523,452
Total Semiconductors & Semiconductor Equipment				126,083,964
Software - 7.2%
2U, Inc.*		327,631		19,821,676
Materialise NV (Belgium)*(a)		1,882,941		31,369,797
Nutanix, Inc., Class A*		455,918		19,691,098
salesforce.com, Inc.*		151,135		24,990,172
Splunk, Inc.*		179,256		24,744,498
Total Software				120,617,241
Technology Hardware, Storage & Peripherals - 6.2%
Stratasys Ltd.*†		4,478,112		104,116,104
Thrifts & Mortgage Finance - 1.6%
LendingTree, Inc.*		71,236		27,413,038
Total Common Stocks
(Cost $1,504,856,695)				1,675,434,623
MONEY MARKET FUND–0.0%(b)
Morgan Stanley Institutional Liquidity Fund - Government Portfolio, 2.34% (c)
(Cost $695,411)		695,411		695,411
Total Investments–100.0%
(Cost $1,505,552,106)				1,676,130,034
Liabilities in Excess of Other Assets–(0.0)%(b)				(​663,950)
Net Assets–100.0%			$	1,675,466,084

Affiliated Issuer Transactions

A summary of the Fund’s transactions with affiliated investments during the period ended April 30, 2019 is as follows:

Value ($) at 7/31/2018	Purchases Cost ($)		Sales Proceeds ($)			Net Realized Gain/(Loss) ($)			Net Change in Unrealized Appreciation (Depreciation) ($)			Dividend Income ($)		Capital Gain Distributions ($)		Number of Shares at 4/30/2019		Value ($) at 4/30/2019
Common Stocks — 25.8%
Machinery — 0.6%
ExOne (The) Co.  †
6,055,623		3,573,861		(1,002,366	)		134,449			1,562,504			–		–		1,165,245		10,324,071
Biotechnology — 13.9%
Intellia Therapeutics, Inc.  †
77,985,526		45,975,372		(10,594,669	)		(713,549	)		(39,540,174	)		–		–		4,753,739		73,112,506
Invitae Corp.  †
48,666,304		33,296,648		(46,043,660	)		8,192,269			67,797,306			–		–		4,737,886		111,908,867
Organovo Holdings, Inc.  †
10,058,480		4,484,261		(1,138,889	)		(8,542	)		(2,002,156	)		–		–		11,393,154		11,393,154
Seres Therapeutics, Inc.  †
14,870,069		9,418,523		(1,816,152	)		(410,431	)		(2,140,483	)		–		–		3,046,105		19,921,526
Syros Pharmaceuticals, Inc.  †
12,419,355		9,721,542		(1,413,553	)		(2,845	)		(4,548,921	)		–		–		2,237,286		16,175,578
Life Sciences Tools & Services — 5.1%
Compugen Ltd.  †
11,774,722		6,347,675		(1,484,342	)		229,165			964,615			–		–		5,094,810		17,831,835
NanoString Technologies, Inc.  †
28,112,857		19,659,756		(14,348,999	)		3,184,582			31,853,191			–		–		2,636,172		68,461,387
Technology Hardware, Storage & Peripherals — 6.2%
Stratasys Ltd.  †
81,435,905		47,962,433		(42,225,835	)		1,734,654			15,208,947			–		–		4,478,112		104,116,104
291,378,841		180,440,071		(120,068,465	)		12,339,752			69,154,829			–		–		39,542,509		433,245,028

*	Non-income producing security
†	Affiliated security
(a)	American Depositary Receipt
(b)	Less than 0.05%
(c)	Rate shown represents annualized 7-day yield as of April 30, 2019.

Fair Value Measurement

The Fund discloses the fair value of its investments in a hierarchy that distinguishes between: (i) market participant assumptions developed based on market data obtained from sources independent of the Fund (observable inputs) and (ii) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the hierarchy are as follows:

• Level 1 — Quoted prices in active markets for identical assets.

• Level 2 — Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

• Level 3 — Significant unobservable inputs (including each Fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the valuations as of April 30, 2019, based upon the three levels defined above:

ARK Innovation ETF	Level 1		Level 2		Level 3		Total
Assets
Common Stocks*	$	1,675,434,623	$	–	$	–	$	1,675,434,623
Money Market Fund		695,411		–		–		695,411
Total	$	1,676,130,034	$	–	$	–	$	1,676,130,034

* Please refer to the Schedule of Investments to view securities segregated by industry type.

See accompanying Notes to Quarterly Schedule of Investments.

Schedule of Investments
ARK Israel Innovative Technology ETF

April 30, 2019 (Unaudited)

Investments	Shares		Value
COMMON STOCKS–96.8%
Aerospace & Defense - 7.1%
Aeronautics Ltd. (Israel)*		116,127	$	482,202
Bet Shemesh Engines Holdings 1997 Ltd. (Israel)		18,743		474,208
Elbit Systems Ltd. (Israel)		3,365		468,375
Total Aerospace & Defense				1,424,785
Biotechnology - 9.1%
Galmed Pharmaceuticals Ltd. (Israel)*		59,305		460,800
Intec Pharma Ltd. (Israel)*		75,202		458,732
Kamada Ltd. (Israel)*		76,535		446,283
UroGen Pharma Ltd.*		12,983		466,739
Total Biotechnology				1,832,554
Communications Equipment - 16.2%
AudioCodes Ltd. (Israel)		30,696		432,507
Ceragon Networks Ltd. (Israel)*		127,603		488,719
Gilat Satellite Networks Ltd. (Israel)		54,388		484,178
Ituran Location and Control Ltd. (Israel)		13,087		481,209
RADCOM Ltd. (Israel)*		59,552		512,743
Radware Ltd. (Israel)*		18,244		475,986
Silicom Ltd. (Israel)*		12,669		388,685
Total Communications Equipment				3,264,027
Diversified Telecommunication - 2.3%
Bezeq The Israeli Telecommunication Corp. Ltd. (Israel)		665,306		454,885
Health Care Equipment & Supplies - 4.5%
Brainsway Ltd. (Israel)*		82,313		452,293
Intercure Ltd. (Israel)*		162,151		456,535
Total Health Care Equipment & Supplies				908,828
IT Services - 4.8%
Matrix IT Ltd. (Israel)		33,936		452,172
Wix.com Ltd. (Israel)*		3,885		521,211
Total IT Services				973,383
Life Sciences Tools & Services - 2.5%
Compugen Ltd. (Israel)*		142,073		497,255
Pharmaceuticals - 11.6%
Foamix Pharmaceuticals Ltd. (Israel)*		137,598		447,193
MediWound Ltd. (Israel)*		80,537		428,457
Redhill Biopharma Ltd. (Israel)*(a)		58,366		458,757
Taro Pharmaceutical Industries Ltd.		4,652		499,671
Teva Pharmaceutical Industries Ltd. (Israel)*(a)		33,573		510,981
Total Pharmaceuticals				2,345,059
Professional Services - 2.4%
Danel Adir Yeoshua Ltd. (Israel)		8,306		485,024
Semiconductors & Semiconductor Equipment - 13.0%
Camtek Ltd. (Israel)		44,865		447,753
KLA-Tencor Corp.		2,144		273,317
Mellanox Technologies Ltd.*		3,983		479,155
Nova Measuring Instruments Ltd. (Israel)*		16,613		462,838
SolarEdge Technologies, Inc.*		11,071		490,445
Tower Semiconductor Ltd. (Israel)*		26,691		479,637
Total Semiconductors & Semiconductor Equipment				2,633,145
Software - 16.4%
Allot Ltd. (Israel)*		59,615		440,555
Attunity Ltd. (Israel)*		20,220		474,159
Check Point Software Technologies Ltd. (Israel)*		3,706		447,537
CyberArk Software Ltd. (Israel)*		3,940		507,984
Hilan Ltd. (Israel)		16,451		453,529
Nice Ltd. (Israel)*(a)		3,641		501,948
Sapiens International Corp. NV (Israel)		31,823		489,119
Total Software				3,314,831
Technology Hardware, Storage & Peripherals - 2.3%
Stratasys Ltd.*		19,862		461,792
Wireless Telecommunication Services - 4.6%
Cellcom Israel Ltd. (Israel)*		110,305		461,399
Partner Communications Co. Ltd. (Israel)*		104,829		473,165
Total Wireless Telecommunication Services				934,564
Total Common Stocks
(Cost $18,834,401)				19,530,132
MONEY MARKET FUND–1.6%
Morgan Stanley Institutional Liquidity Fund - Government Portfolio, 2.34% (b)
(Cost $318,256)		318,256		318,256
Total Investments–98.4%
(Cost $19,152,657)				19,848,388
Other Assets in Excess of Liabilities–1.6%				327,900
Net Assets–100.0%			$	20,176,288

*	Non-income producing security
(a)	American Depositary Receipt
(b)	Rate shown represents annualized 7-day yield as of April 30, 2019.

Country	Value		% of Net Assets
Israel	$	16,859,013		83.6	%
United States		2,989,375		14.8
Total Investments		19,848,388		98.4
Other Assets in Excess of Liabilities		327,900		1.6
Net Assets	$	20,176,288		100.0	%

Fair Value Measurement

The Fund discloses the fair value of its investments in a hierarchy that distinguishes between: (i) market participant assumptions developed based on market data obtained from sources independent of the Fund (observable inputs) and (ii) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the hierarchy are as follows:

• Level 1 — Quoted prices in active markets for identical assets.

• Level 2 — Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

• Level 3 — Significant unobservable inputs (including each Fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the valuations as of April 30, 2019, based upon the three levels defined above:

ARK Israel Innovative Technology ETF	Level 1		Level 2		Level 3		Total
Assets
Common Stocks*	$	19,530,132	$	–	$	–	$	19,530,132
Money Market Fund		318,256		–		–		318,256
Total	$	19,848,388	$	–	$	–	$	19,848,388

* Please refer to the Schedule of Investments to view securities segregated by industry type.

See accompanying Notes to Quarterly Schedule of Investments.

Schedule of Investments
ARK Web x.0 ETF

April 30, 2019 (Unaudited)

Investments	Shares		Value
COMMON STOCKS–98.7%
Automobiles - 8.5%
Tesla, Inc.*		180,604	$	43,108,369
Biotechnology - 3.1%
Veracyte, Inc.*		695,297		15,901,443
Consumer Finance - 3.4%
LendingClub Corp.*		5,352,113		17,019,719
Entertainment - 7.0%
Netflix, Inc.*		54,884		20,336,718
Spotify Technology SA*		109,652		14,887,452
Total Entertainment				35,224,170
Health Care Technology - 4.0%
Medidata Solutions, Inc.*		129,738		11,720,531
Teladoc Health, Inc.*		150,355		8,552,192
Total Health Care Technology				20,272,723
Interactive Media & Services - 19.5%
Baidu, Inc. (China)*(a)		151,272		25,145,945
Eventbrite, Inc., Class A*		253,561		6,339,025
Tencent Holdings Ltd. (China)(a)		481,689		23,718,366
Twitter, Inc.*		752,306		30,024,532
Zillow Group, Inc., Class C*		403,927		13,491,162
Total Interactive Media & Services				98,719,030
Internet & Direct Marketing Retail - 10.4%
Alibaba Group Holding Ltd. (China)*(a)		78,210		14,513,430
Amazon.com, Inc.*		5,793		11,160,330
GrubHub, Inc.*		157,049		10,489,303
MercadoLibre, Inc. (Argentina)*		10,522		5,094,121
Pinduoduo, Inc. (China)*(a)		516,041		11,471,591
Total Internet & Direct Marketing Retail				52,728,775
IT Services - 11.3%
PayPal Holdings, Inc.*		136,217		15,361,191
Shopify, Inc., Class A (Canada)*		29,124		7,092,568
Square, Inc., Class A*		403,090		29,353,014
Twilio, Inc., Class A*		40,204		5,513,576
Total IT Services				57,320,349
Semiconductors & Semiconductor Equipment - 12.0%
Advanced Micro Devices, Inc.*		523,278		14,458,171
NVIDIA Corp.		200,967		36,375,027
Taiwan Semiconductor Manufacturing Co. Ltd. (Taiwan)(a)		912		39,964
Xilinx, Inc.		83,716		10,057,640
Total Semiconductors & Semiconductor Equipment				60,930,802
Software - 15.8%
2U, Inc.*		135,290		8,185,045
Adobe, Inc.*		30,548		8,836,009
Atlassian Corp. PLC, Class A*		47,138		5,192,251
Cloudera, Inc.*		1,140,467		12,693,398
HubSpot, Inc.*		50,891		9,388,881
Nutanix, Inc., Class A*		225,563		9,742,066
salesforce.com, Inc.*		60,661		10,030,296
Splunk, Inc.*		72,280		9,977,531
Zuora, Inc., Class A*		277,812		6,139,645
Total Software				80,185,122
Thrifts & Mortgage Finance - 3.7%
LendingTree, Inc.*		48,132		18,522,156
Total Common Stocks
(Cost $452,479,272)				499,932,658
UNIT TRUST–1.3%
Financials - 1.3%
Grayscale Bitcoin Trust BTC*
(Cost $5,178,258)		980,439		6,480,702
MONEY MARKET FUND–0.1%
Morgan Stanley Institutional Liquidity Fund - Government Portfolio, 2.34% (b)
(Cost $615,088)		615,088		615,088
Total Investments–100.1%
(Cost $458,272,618)				507,028,448
Liabilities in Excess of Other Assets–(0.1)%				(​328,528)
Net Assets–100.0%			$	506,699,920

*	Non-income producing security
(a)	American Depositary Receipt
(b)	Rate shown represents annualized 7-day yield as of April 30, 2019.

Fair Value Measurement

The Fund discloses the fair value of its investments in a hierarchy that distinguishes between: (i) market participant assumptions developed based on market data obtained from sources independent of the Fund (observable inputs) and (ii) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the hierarchy are as follows:

• Level 1 — Quoted prices in active markets for identical assets.

• Level 2 — Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

• Level 3 — Significant unobservable inputs (including each Fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the valuations as of April 30, 2019, based upon the three levels defined above:

ARK Web x.0 ETF	Level 1		Level 2		Level 3		Total
Assets
Common Stocks*	$	499,932,658	$	–	$	–	$	499,932,658
Unit Trust*		6,480,702		–		–		6,480,702
Money Market Fund		615,088		–		–		615,088
Total	$	507,028,448	$	–	$	–	$	507,028,448

* Please refer to the Schedule of Investments to view securities segregated by industry type.

See accompanying Notes to Quarterly Schedule of Investments.

Schedule of Investments

The 3D Printing ETF

April 30, 2019 (Unaudited)

Investments	Shares		Value
COMMON STOCKS–99.4%
Aerospace & Defense - 3.1%
Aerojet Rocketdyne Holdings, Inc.*		11,645	$	394,300
Arconic, Inc.		18,706		401,805
Hexcel Corp.		736		52,042
Moog, Inc., Class A		4,001		374,654
Total Aerospace & Defense				1,222,801
Air Freight & Logistics - 0.9%
United Parcel Service, Inc., Class B		3,259		346,171
Biotechnology - 5.6%
Organovo Holdings, Inc.*		2,244,451		2,244,451
Chemicals - 0.8%
Arkema SA (France)		467		47,906
DowDuPont, Inc.		1,227		47,178
Eastman Chemical Co.		599		47,249
Evonik Industries AG (Germany)		1,574		46,889
Koninklijke DSM N.V. (Netherlands)		433		49,464
PolyOne Corp.		1,670		46,159
Toray Industries, Inc. (Japan)		6,996		47,605
Total Chemicals				332,450
Electrical Equipment - 1.4%
AMETEK, Inc.		5,845		515,354
SGL Carbon SE (Germany)*		5,396		48,175
Total Electrical Equipment				563,529
Electronic Equipment, Instruments & Components - 11.5%
FARO Technologies, Inc.*		8,867		498,769
Hexagon AB, Class B (Sweden)		8,995		490,611
Renishaw PLC (United Kingdom)		41,371		2,434,128
Trimble, Inc.*		29,378		1,199,210
Total Electronic Equipment, Instruments & Components				4,622,718
Health Care Equipment & Supplies - 12.7%
Align Technology, Inc.*		1,830		594,164
Conformis, Inc.*		339,633		842,290
Medtronic PLC		4,404		391,119
NuVasive, Inc.*		6,925		419,655
Straumann Holding AG (Switzerland)		3,023		2,440,473
Stryker Corp.		2,070		391,044
Total Health Care Equipment & Supplies				5,078,745
Industrial Conglomerates - 2.1%
3M Co.		231		43,777
General Electric Co.		40,913		416,085
Siemens AG (Germany)		3,120		373,527
Total Industrial Conglomerates				833,389
Machinery - 18.4%
ExOne Co. (The)*		281,513		2,494,205
OC Oerlikon Corp. AG (Switzerland)		28,358		370,147
Prodways Group SA (France)*		179,672		540,076
Proto Labs, Inc.*		10,512		1,154,113
Sandvik AB (Sweden)		2,736		50,602
SLM Solutions Group AG (Germany)*		239,599		2,767,973
Total Machinery				7,377,116
Metals & Mining - 1.1%
Allegheny Technologies, Inc.*		1,928		48,046
Carpenter Technology Corp.		990		49,173
Kaiser Aluminum Corp.		3,509		345,286
Total Metals & Mining				442,505
Professional Services - 1.8%
Arrk Corp. (Japan)*		384,933		359,379
Bertrandt AG (Germany)		4,537		353,666
Total Professional Services				713,045
Semiconductors & Semiconductor Equipment - 0.9%
Ultra Clean Holdings, Inc.*		29,895		357,843
Software - 20.8%
Altair Engineering, Inc., Class A*		23,551		928,852
ANSYS, Inc.*		6,446		1,262,127
Autodesk, Inc.*		7,178		1,279,191
Dassault Systemes (France)		7,948		1,257,392
Materialise NV (Belgium)*(a)		70,136		1,168,466
Microsoft Corp.		9,895		1,292,287
PTC, Inc.*		12,520		1,132,684
Total Software				8,320,999
Technology Hardware, Storage & Peripherals - 18.3%
3D Systems Corp.*		214,109		2,278,120
Eastman Kodak Co.*		20,106		49,461
HP Inc.		122,061		2,435,117
MGI Digital Graphic Technology (France)*		2,064		100,702
Stratasys Ltd.*		103,990		2,417,767
Xerox Corp.		1,448		48,305
Total Technology Hardware, Storage & Peripherals				7,329,472
Total Common Stocks
(Cost $39,650,774)				39,785,234
PREFERRED STOCK–0.1%
Household Products - 0.1%
Henkel AG & Co. KGaA (Germany) (Cost $60,274)		484		48,987
MONEY MARKET FUND–0.1%
Morgan Stanley Institutional Liquidity Fund - Government Portfolio, 2.34% (b)
(Cost $55,006)		55,006		55,006
Total Investments–99.6%
(Cost $39,766,054)				39,889,227
Other Assets in Excess of Liabilities–0.4%				154,655
Net Assets–100.0%			$	40,043,882

*	Non-income producing security
(a)	American Depositary Receipt
(b)	Rate shown represents annualized 7-day yield as of April 30, 2019.

Fair Value Measurement

The Fund discloses the fair value of its investments in a hierarchy that distinguishes between: (i) market participant assumptions developed based on market data obtained from sources independent of the Fund (observable inputs) and (ii) the Fund’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the hierarchy are as follows:

• Level 1 — Quoted prices in active markets for identical assets.

• Level 2 — Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

• Level 3 — Significant unobservable inputs (including each Fund’s own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the valuations as of April 30, 2019, based upon the three levels defined above:

The 3D Printing ETF	Level 1		Level 2		Level 3		Total
Assets
Common Stocks*	$	39,785,234	$	–	$	–	$	39,785,234
Preferred Stock*		48,987		–		–		48,987
Money Market Fund		55,006		–		–		55,006
Total	$	39,889,227	$	–	$	–	$	39,889,227

* Please refer to the Schedule of Investments to view securities segregated by industry type.

See accompanying Notes to Quarterly Schedule of Investments.

1. Organization

ARK ETF Trust (‘‘Trust’’) is an open-end management investment company registered under the Investment Company Act of 1940, as amended (‘‘1940 Act’’). The Trust was organized as a Delaware statutory trust on June 7, 2013.  The Trust consists of seven (7) investment portfolios: ARK Fintech Innovation ETF, ARK Genomic Revolution ETF, ARK Industrial Innovation ETF, ARK Innovation ETF, ARK Israel Innovative Technology ETF, ARK Web x.0 ETF and The 3D Printing ETF (each, a ‘‘Fund’’ and collectively, ‘‘Funds’’). Each Fund is classified as a non-diversified management investment company under the 1940 Act.

Effective November 30, 2018, the ARK Genomic Revolution Multi-Sector ETF changed its name to the ARK Genomic Revolution ETF.

On February 4, 2019, the Trust launched a seventh investment portfolio, the ARK Fintech Innovation ETF. Financial Highlights of the ARK Fintech Innovation ETF will be provided in the Annual Report to Shareholders for the fiscal year ending July 31, 2019.

The investment objective of ARK Fintech Innovation ETF, ARK Genomic Revolution ETF, ARK Industrial Innovation ETF, ARK Innovation ETF and ARK Web x.0 ETF is long-term growth of capital. The ARK Israel Innovative Technology ETF seeks to provide investment results that closely correspond, before fees and expenses, to the performance of the ARK Israel Innovation Index. The 3D Printing ETF seeks to provide investment results that closely correspond, before fees and expenses, to the performance of the Total 3D-Printing Index. There can be no assurance that the Funds will achieve their respective investment objectives.

The Trust changed its fiscal and tax reporting period from August 31 to July 31.

2. Significant Accounting Policies

These Schedules of Investments are prepared in accordance with accounting principles generally accepted in the United States of America (‘‘U.S. GAAP’’), which require management to make estimates and assumptions that affect the reported amount of assets and liabilities, the disclosure of contingent liabilities at the date of the financial statements, and the reported amount of increase and decrease in net assets from operations during the fiscal period. Actual amounts could differ from these estimates. The Trust is an investment company and follows the investment company accounting standards and reporting guidance under Financial Accounting Standards Board (FASB) Accounting Standard Codification (“ASC”) Topic 946, ‘‘Financial Services — Investment Companies’’. The following summarizes the significant accounting policies of the Funds:

Investment Valuation

The values of each Fund’s securities are based on such securities’ closing prices on the principal market on which the securities are traded. Such valuations would typically be categorized as Level 1 in the fair value hierarchy. If a security’s market price is not readily available or does not otherwise accurately reflect the market value of such security, the security will be fair valued by ARK Investment Management LLC (‘‘Adviser”) in accordance with the Trust’s valuation policies and procedures that were approved by the Board of Trustees of the Trust (‘‘Board’’). Each Fund may use fair value pricing in a variety of circumstances, including but not limited to, situations when the value of a Fund’s security has been materially affected by events occurring after the close of the market on which such security is principally traded (such as a corporate action or other news that may materially affect the price of such security) or trading in such security has been suspended or halted. Such valuations would typically be categorized as Level 2 or Level 3 in the fair value hierarchy. Fair value pricing involves subjective judgments and it is possible that a fair value determination for a security could be materially different than the value that could be realized upon the sale of such security.

3. Investment Concentration

Concentration Risk: The ARK Fintech Innovation ETF will be concentrated in securities of issuers having their principal business activities in the communication, technology and financials group of industries. The ARK Genomic Revolution ETF will be concentrated in securities of issuers having their principal business activities in any industry or group of industries in the health care sector, including issuers having their principal business activities in the biotechnology industry. The ARK Industrial Innovation ETF will be concentrated in securities of issuers having their principal business activities in groups of industries in the industrials and information technology sectors, although it will not concentrate in any specific industry. The ARK Web x.0 ETF will be concentrated in securities of issuers having their principal business activities in the Internet information provider and catalog and mail order house industry. The 3D Printing ETF and the ARK Israel Innovative Technology ETF may each invest 25% or more of the value of its respective net assets in securities of issuers in any one industry or group of industries if the applicable index that the Fund replicates concentrates in an industry or group of industries. This concentration limit does not apply to securities issued or guaranteed by the U.S. Government, its agencies or instrumentalities. The ARK Innovation ETF will not be concentrated in any industry. 

As of April 30, 2019, the ARK Genomic Revolution ETF had more than 25% of its assets invested in the biotechnology industry and the ARK Fintech Innovation ETF had more than 25% of its assets invested in the communication, technology and financials group of industries. To the extent a Fund’s holdings are concentrated in a particular industry or group of industries, adverse market conditions affecting those industries may have a more significant impact on the Fund than they would on a Fund investing in a broader range of securities and the value of the Fund’s shares may fluctuate more than shares of a fund investing in a broader range of securities.

The Funds’ prospectuses contain additional information regarding the risks associated with an investment in a Fund.

Item 2. Controls and Procedures.

(a) Within 90 days of the filing date of this Form N-Q, the registrant’s principal executive and principal financial officers, or persons performing similar functions, concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”) (17 CFR 270.30a-3(c))) are effective, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934, as amended (17 CFR 240.13a-15(b) or 240.15d-15(b)).

(b) There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d))) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 3. Exhibits.

Certifications pursuant to Rule 30a-2(a) under the 1940 Act and Section 302 of the Sarbanes-Oxley Act of 2002 are attached hereto.

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) ARK ETF Trust

By (Signature and Title)* /s/ Catherine D. Wood             

Catherine D. Wood, Chief Executive Officer and Chief Investment Officer

(principal executive officer)

Date June 26, 2019

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 (Signature and Title)* /s/ Catherine D. Wood             

Catherine D. Wood, Chief Executive Officer and Chief Investment Officer

(principal executive officer)

Date June 26, 2019

By (Signature and Title)* /s/ William C. Cox                      

William C. Cox, Treasurer and Chief Financial Officer

(principal financial officer)

Date June 26, 2019

^* Print the name and title of each signing officer under his or her signature.