Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Annual Report

October 31, 2021

Shareholder Letter	1
Fund Performance Overview	2
Portfolio Commentary	4
Understanding Your Fund Expenses	6
Portfolio of Investments	7
Statement of Assets and Liabilities	13
Statement of Operations	14
Statements of Changes in Net Assets	15
Financial Highlights	16
Notes to Financial Statements	17
Report of Independent Registered Public Accounting Firm	23
Additional Information	24
Board of Trustees and Officers	30
Privacy Policy	32

Caution Regarding Forward-Looking Statements

This report contains certain forward-looking statements within the meaning of the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended. Forward-looking statements include statements regarding the goals, beliefs, plans or current expectations of First Trust Advisors L.P. (“First Trust” or the “Advisor”) and/or SSI Investment Management LLC (“SSI” or the “Sub-Advisor”) and their respective representatives, taking into account the information currently available to them. Forward-looking statements include all statements that do not relate solely to current or historical fact. For example, forward-looking statements include the use of words such as “anticipate,” “estimate,” “intend,” “expect,” “believe,” “plan,” “may,” “should,” “would” or other words that convey uncertainty of future events or outcomes.

Forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause the actual results, performance or achievements of the series of First Trust Exchange-Traded Fund IV (the “Trust”) described in this report (First Trust SSI Strategic Convertible Securities ETF; hereinafter referred to as the “Fund”) to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. When evaluating the information included in this report, you are cautioned not to place undue reliance on these forward-looking statements, which reflect the judgment of the Advisor and/or Sub-Advisor and their respective representatives only as of the date hereof. We undertake no obligation to publicly revise or update these forward-looking statements to reflect events and circumstances that arise after the date hereof.

Performance and Risk Disclosure

There is no assurance that the Fund will achieve its investment objective. The Fund is subject to market risk, which is the possibility that the market values of securities owned by the Fund will decline and that the value of the Fund’s shares may therefore be less than what you paid for them. Accordingly, you can lose money by investing in the Fund. See “Risk Considerations” in the Additional Information section of this report for a discussion of certain other risks of investing in the Fund.

Performance data quoted represents past performance, which is no guarantee of future results, and current performance may be lower or higher than the figures shown. For the most recent month-end performance figures, please visit www.ftportfolios.com or speak with your financial advisor. Investment returns, net asset value and share price will fluctuate and Fund shares, when sold, may be worth more or less than their original cost.

The Advisor may also periodically provide additional information on Fund performance on the Fund’s web page at www.ftportfolios.com.

How to Read This Report

This report contains information that may help you evaluate your investment in the Fund. It includes details about the Fund and presents data and analysis that provide insight into the Fund’s performance and investment approach.

By reading the portfolio commentary by the portfolio management team of the Fund, you may obtain an understanding of how the market environment affected the Fund’s performance. The statistical information that follows may help you understand the Fund’s performance compared to that of a relevant market benchmark.

It is important to keep in mind that the opinions expressed by personnel of the Advisor and/or Sub-Advisor are just that: informed opinions. They should not be considered to be promises or advice. The opinions, like the statistics, cover the period through the date on the cover of this report. The material risks of investing in the Fund are spelled out in the prospectus, the statement of additional information, and other Fund regulatory filings.

Table of Contents

Shareholder Letter

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Annual Letter from the Chairman and CEO

October 31, 2021

Dear Shareholders,

First Trust is pleased to provide you with the annual report for the First Trust SSI Strategic Convertible Securities ETF (the “Fund”), which contains detailed information about the Fund for the twelve months ended October 31, 2021.

Inflation has arrived, and its entrance was grand, to say the least. The Consumer Price Index came in at 6.2% year-over-year in October 2021, according to data from the U.S. Bureau of Labor Statistics. The last time it topped the 6.0% mark was in December 1990 (6.1%), over 30 years ago. As is often the case with major shifts in the economy and markets, there is debate over what is truly behind them. For many months, as inflation was trending higher, Federal Reserve (the “Fed”) Chairman Jerome Powell held the view that the rising inflationary pressures largely stemmed from global supply chain bottlenecks induced by the coronavirus (“COVID-19”) pandemic. Perhaps the best example of this is the unprecedented backlog of container ships that have dropped anchor outside the California ports of Los Angeles and Long Beach. Together, these ports service 40% of all the container ships bound for the U.S. In normal times, no ships are anchored waiting to unload their goods. Shortages of trucks and drivers have also contributed to the slowdown at the ports.

The takeaway is that goods are not being delivered to warehouses and store shelves in a timely fashion and that is helping to drive prices higher for consumers. Simply put, inflation is the byproduct of too much money chasing too few goods. We’ll return to this axiom shortly. Chairman Powell originally believed the bottlenecks would be remedied relatively quickly as the global economy reopened and people went back to work. That, in turn, would allow inflationary pressures to dissipate, which has not happened. Around the end of October, Chairman Powell finally acknowledged that inflation will likely remain elevated through mid-2022. This realization is what motivated the Fed to announce that it would begin to taper its monthly bond buying program (quantitative easing) starting in November 2021. It has been purchasing roughly $80 billion of Treasuries and $40 billion of mortgage-backed securities in the open market every month since June 2020. The Fed will shave $15 billion off that combined total every month until the buying has ceased, which should be around mid-2022. If all goes to plan, the next stage in the evolution of the Fed’s monetary policy would involve initiating interest rate hikes.

While the supply chain bottlenecks have clearly played a role in the spike in inflation by limiting the amount of goods available to consume, the biggest contributing factor is likely the surge in the U.S. money supply, according to Brian Wesbury, Chief Economist at First Trust. M2 is a measure of the money supply that includes cash, checking deposits and liquid assets easily convertible to cash. The M2 measure of money has exploded by 36% since February 2020, well above the 6% pre-COVID-19 annualized norm. The trillions of dollars of stimulus distributed by the U.S. government to help backstop the economy during the pandemic has contributed to higher inflation. On Wednesday, November 10, 2021, President Joe Biden admitted that his $1.9 trillion COVID-19 stimulus package has done just that. Remember, too much money chasing too few goods leads to inflation. Keep in mind, President Biden has recently successfully navigated a $1.2 trillion bipartisan infrastructure bill through Congress and has another roughly $1.75 trillion Build Back Better Act (social spending) piece of legislation pending. That means there is at least another $1.2 trillion dollars flowing into the economy over the next few years, and maybe more.

Data from FactSet indicates that the number of S&P 500^® Index companies mentioning inflation on their 2021 third quarter earnings call hit a 10-year high, according to Business Insider. To date, 285 of the 461 companies that have reported their results have cited concerns over rising inflation. The Materials, Consumer Staples and Energy sectors had the highest percentage of companies mentioned on these earnings calls at 90%, 88% and 86%, respectively. Suffice it to say, investors should add inflation to the list of criteria to assist them in positioning their portfolios moving forward.

Thank you for giving First Trust the opportunity to play a role in your financial future. We value our relationship with you and will report on the Fund again in six months.

Sincerely,

James A. Bowen

Chairman of the Board of Trustees

Chief Executive Officer of First Trust Advisors L.P.

Page 1

Table of Contents

Fund Performance Overview (Unaudited)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

The First Trust SSI Strategic Convertible Securities ETF (the “Fund”) is an actively managed exchange-traded fund that seeks total return by investing, under normal market conditions, at least 80% of its net assets (including investment borrowings) in a portfolio of U.S. and non-U.S. convertible securities. The shares of the Fund are listed and traded on The Nasdaq Stock Market LLC under the ticker symbol “FCVT.”

Performance
		Average Annual Total Returns		Cumulative Total Returns
	1 Year Ended 10/31/21	5 Years Ended 10/31/21	Inception (11/3/15) to 10/31/21	5 Years Ended 10/31/21	Inception (11/3/15) to 10/31/21
Fund Performance
NAV	32.74%	17.90%	15.24%	127.83%	133.93%
Market Price	31.30%	17.73%	15.17%	126.17%	133.14%
Index Performance
ICE BofA All US Convertible Index	32.95%	18.59%	15.74%	134.57%	140.12%

Total returns for the period since inception are calculated from the inception date of the Fund. “Average Annual Total Returns” represent the average annual change in value of an investment over the periods indicated. “Cumulative Total Returns” represent the total change in value of an investment over the periods indicated.

The Fund’s per share net asset value (“NAV”) is the value of one share of the Fund and is computed by dividing the value of all assets of the Fund (including accrued interest and dividends), less all liabilities (including accrued expenses and dividends declared but unpaid), by the total number of outstanding shares. The price used to calculate market return (“Market Price”) is determined by using the midpoint of the national best bid and offer price (“NBBO”) as of the time that the Fund’s NAV is calculated. Under SEC rules, the NBBO consists of the highest displayed buy and lowest sell prices among the various exchanges trading the Fund at the time the Fund’s NAV is calculated. Prior to January 1, 2019, the price used was the midpoint between the highest bid and the lowest offer on the stock exchange on which shares of the Fund were listed for trading as of the time that the Fund’s NAV was calculated. Since shares of the Fund did not trade in the secondary market until after its inception, for the period from inception to the first day of secondary market trading in shares of the Fund, the NAV of the Fund is used as a proxy for the secondary market trading price to calculate market returns. NAV and market returns assume that all distributions have been reinvested in the Fund at NAV and Market Price, respectively.

An index is a statistical composite that tracks a specified financial market or sector. Unlike the Fund, the index does not actually hold a portfolio of securities and therefore does not incur the expenses incurred by the Fund. These expenses negatively impact the performance of the Fund. Also, market returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. The total returns presented reflect the reinvestment of dividends on securities in the index. The returns presented do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. The investment return and principal value of shares of the Fund will vary with changes in market conditions. Shares of the Fund may be worth more or less than their original cost when they are redeemed or sold in the market. The Fund’s past performance is no guarantee of future performance.

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Table of Contents

Fund Performance Overview (Unaudited) (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT) (Continued)

Sector Allocation	% of Total Investments
Information Technology	29.4%
Consumer Discretionary	16.1
Health Care	15.8
Communication Services	11.5
Industrials	11.4
Financials	5.3
Energy	3.8
Materials	2.2
Utilities	1.7
Real Estate	1.7
Consumer Staples	1.1
Total	100.0%

Top Ten Holdings	% of Total Investments
Palo Alto Networks, Inc., 7/1/23	2.6%
Broadcom, Inc., Series A, 9/30/22	2.5
DexCom, Inc., 11/15/25	1.9
Southwest Airlines Co., 5/1/25	1.8
Etsy, Inc., 9/1/27	1.7
Square, Inc., 11/1/27	1.6
Pioneer Natural Resources Co., 5/15/25	1.6
NCL Corp., Ltd., 8/1/25	1.5
Avantor, Inc., Series A, 5/15/22	1.4
Tesla, Inc., 5/15/24	1.4
Total	18.0%

Performance figures assume reinvestment of all distributions and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. An index is a statistical composite that tracks a specified financial market or sector. Unlike the Fund, the index does not actually hold a portfolio of securities and therefore does not incur the expenses incurred by the Fund. These expenses negatively impact the performance of the Fund. The Fund’s past performance does not predict future performance.

Frequency Distribution of Discounts and Premiums

Information showing the number of days the market price of the Fund’s shares was greater (at a premium) and less (at a discount) than the Fund’s net asset value for the most recently completed year, and the most recently completed calendar quarters since that year (or life of the Fund, if shorter), is available at https://www.ftportfolios.com/Retail/etf/home.aspx.

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Portfolio Commentary

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Annual Report

October 31, 2021 (Unaudited)

Advisor

First Trust Advisors L.P. (“First Trust” or the “Advisor”) serves as the investment advisor to the First Trust SSI Strategic Convertible Securities ETF (the “Fund”). First Trust is responsible for the ongoing monitoring of the Fund’s investment portfolio, managing the Fund’s business affairs and providing certain administrative services necessary for the management of the Fund.

Sub-Advisor

SSI Investment Management LLC

SSI Investment Management LLC (“SSI” or the “Sub-Advisor”) is the sub-advisor to the Fund and is a registered investment advisor based in Los Angeles, California. SSI is an innovative investment management firm specializing in alternative investment solutions utilizing convertible assets, equity securities and hedging strategies.

Portfolio Management Team

George M. Douglas – CFA, Principal and Chief Investment Officer of SSI

Ravi Malik – CFA, Principal and Portfolio Manager of SSI

Michael J. Opre – CFA, Portfolio Manager of SSI

Florian Eitner – CFA, Portfolio Manager of SSI

Stephen R. Wachtel – CFA, Portfolio Manager of SSI

Commentary

Market Recap – For the 12-month period ended October 31, 2021:

•	Fiscal and monetary stimulus, strong corporate earnings and margins and improved medical treatments/vaccine progress provided fuel for the economy and capital markets.
•	Inflation fears, China growth worries, rising interest rates and the return of the retail investor sparked rotations among asset classes, equity sectors and styles.
•	U.S. economic activity, which experienced an unprecedented drop and rebound, is expected to grow at 5.7% in 2021 and 4% in 2022, according to Bloomberg.
•	Corporate earnings remain strong with 44% expected growth in 2021 and 9% in 2022, according to FactSet.
•	Credit spreads declined to pre-coronavirus (“COVID-19”) pandemic levels on Federal Reserve (the “Fed”) buying and economic recovery.
•	Ten-year Treasury yields rose 71 basis points to 1.56% on rising inflation.
•	Within the convertible universe, the Materials, Energy and Consumer Discretionary sectors generated significant gains, while the Telecommunications, Consumer Staples and Utilities sectors lagged.
•	Small cap and equity alternatives convertibles outperformed.
•	The convertible market remains healthy, in our view, as evidenced by $93 billion in new issuance for the year, a strong encore to last year’s $103 billion.

Fund Performance

•	Convertible performance was driven by strong returns in both equities and high yield markets for the 12-month period ended October 31, 2021. The S&P 500^® Index advanced 42.91% and the Bloomberg High Yield Index rose 10.53% for the same period.
•	Fixed income posted a small loss with the Bloomberg US Aggregate Bond Index down -0.48% for the same period.
•	On a one-year trailing basis, as of October 31, 2021, the Fund generated a net gain of 32.74% based on net asset value, while the ICE BofA All US Convertible Index (VXA0) gained 32.95%.

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Portfolio Commentary (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Annual Report

October 31, 2021 (Unaudited)

•

The Consumer Discretionary sector made the largest contribution to portfolio returns on a relative basis as retailers like RH benefited from a strong housing market and restaurant owner, Bloomin’ Brands, Inc. benefitted from loosening COVID-19 restrictions. The Communications Services sector also helped on a relative basis as Sea Ltd. benefitted from strength in its mobile gaming e-commerce segments.

•

The Information Technology sector detracted from relative performance due to the Fund’s underweight in software convertibles such as Atlassian, Inc. and Cloudflare, Inc. An overweight in the Industrials sector also detracted from relative performance as a number of companies experienced supply chain constraints and wage inflation which adversely impacted profitability.

Investment Outlook

•	In our opinion, the outlook for the Fund remains favorable.
•	Although growth rates are decelerating, we believe that the economic and corporate earnings backdrop remains strong.
•	In our opinion, China growth is likely to disappoint due to a slowdown in property markets and government regulation.
•	Global COVID-19 daily cases have started to modestly increase due to a spike in cases in Europe.
•	Inflation has risen and could become more of a headwind if it persists or continues to accelerate.
•	The Fed is likely to remain accommodative, in our opinion, and is moving cautiously to reduce unprecedented stimulus.
•	Supply chain disruptions have caused a deferment of some production into next year, supporting 2022 growth rates.
•	In spite of the political environment, we believe the economy and corporate earnings are likely to receive a boost from additional increases in fiscal spending.
•	We believe convertibles offer significant participation if the markets continue their upward trend but can also offer downside protection if the market experiences a downturn.

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First Trust SSI Strategic Convertible Securities ETF (FCVT)

Understanding Your Fund Expenses

October 31, 2021 (Unaudited)

As a shareholder of the First Trust SSI Strategic Convertible Securities ETF (the “Fund”), you incur two types of costs: (1) transaction costs; and (2) ongoing costs, including management fees, distribution and/or service (12b-1) fees, if any, and other Fund expenses. This Example is intended to help you understand your ongoing costs of investing in the Fund and to compare these costs with the ongoing costs of investing in other funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held through the six-month period ended October 31, 2021.

Actual Expenses

The first line in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that 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 first line under the heading entitled “Expenses Paid During the Six-Month Period” to estimate the expenses you paid on your account during this six-month period.

Hypothetical Example for Comparison Purposes

The second line in the following table provides information about hypothetical account values and hypothetical expenses based on the Fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs such as brokerage commissions. Therefore, the second line in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

	Beginning Account Value May 1, 2021	Ending Account Value October 31, 2021	Annualized Expense Ratio Based on the Six-Month Period	Expenses Paid During the Six-Month Period (a)
First Trust SSI Strategic Convertible Securities ETF (FCVT)
Actual	$1,000.00	$1,020.90	0.95%	$4.84
Hypothetical (5% return before expenses)	$1,000.00	$1,020.42	0.95%	$4.84

(a)	Expenses are equal to the annualized expense ratios as indicated in the table multiplied by the average account value over the period (May 1, 2021 through October 31, 2021), multiplied by 184/365 (to reflect the six-month period).

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First Trust SSI Strategic Convertible Securities ETF (FCVT)

Portfolio of Investments

October 31, 2021

Principal Value	Description	Stated Coupon	Stated Maturity	Value
CONVERTIBLE CORPORATE BONDS – 82.0%
	Aerospace & Defense – 0.5%
$957,835	Safran S.A., Series SAF (EUR) (a)	0.88%	05/15/27	$1,558,510
	Airlines – 3.2%
875,000	Air Canada	4.00%	07/01/25	1,237,976
1,161,000	American Airlines Group, Inc.	6.50%	07/01/25	1,699,307
1,650,000	JetBlue Airways Corp. (b)	0.50%	04/01/26	1,592,607
3,740,000	Southwest Airlines Co.	1.25%	05/01/25	5,264,050
				9,793,940
	Auto Components – 0.3%
945,000	LCI Industries	1.13%	05/15/26	998,215
	Automobiles – 2.6%
3,185,000	Ford Motor Co. (b)	(c)	03/15/26	3,783,420
228,000	Tesla, Inc.	2.00%	05/15/24	4,091,460
				7,874,880
	Banks – 0.6%
1,275,000	Deutsche Bank AG, Series GMTN	1.00%	05/01/23	1,790,527
	Biotechnology – 1.7%
555,000	Apellis Pharmaceuticals, Inc.	3.50%	09/15/26	666,000
570,000	Bridgebio Pharma, Inc.	2.50%	03/15/27	813,467
1,525,000	Exact Sciences Corp.	0.38%	03/15/27	1,731,828
920,000	Insmed, Inc.	0.75%	06/01/28	1,076,033
755,000	Novavax, Inc.	3.75%	02/01/23	1,030,728
				5,318,056
	Capital Markets – 1.1%
1,375,000	Coinbase Global, Inc. (b)	0.50%	06/01/26	1,637,691
1,400,000	WisdomTree Investments, Inc.	4.25%	06/15/23	1,737,597
				3,375,288
	Construction & Engineering – 1.0%
870,000	Granite Construction, Inc.	2.75%	11/01/24	1,157,538
1,800,000	Vinci S.A., Series DGFP (a)	0.38%	02/16/22	2,003,238
				3,160,776
	Consumer Finance – 0.8%
1,180,000	SoFi Technologies, Inc. (b)	(c)	10/15/26	1,385,319
778,000	Upstart Holdings, Inc. (b)	0.25%	08/15/26	1,090,147
				2,475,466
	Diversified Financial Services – 0.4%
1,165,000	JPMorgan Chase Financial Co. LLC (b)	0.25%	05/01/23	1,325,634
	Electronic Equipment, Instruments & Components – 0.3%
849,000	PAR Technology Corp.	1.50%	10/15/27	933,066
	Entertainment – 4.5%
985,000	Bilibili, Inc.	1.25%	06/15/27	1,932,447
1,008,000	IMAX Corp. (b)	0.50%	04/01/26	1,000,178
1,140,000	Liberty Media Corp. - Liberty Formula One	1.00%	01/30/23	1,741,154
2,269,000	Live Nation Entertainment, Inc.	2.50%	03/15/23	3,549,623
458,000	Sea Ltd.	2.38%	12/01/25	1,750,419
3,670,000	Sea Ltd.	0.25%	09/15/26	3,872,676
				13,846,497

See Notes to Financial Statements

Page 7

Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Portfolio of Investments (Continued)

October 31, 2021

Principal Value	Description	Stated Coupon	Stated Maturity	Value
CONVERTIBLE CORPORATE BONDS (Continued)
	Equity Real Estate Investment Trusts – 1.2%
$900,000	Kite Realty Group L.P. (b)	0.75%	04/01/27	$893,292
1,390,000	Pebblebrook Hotel Trust	1.75%	12/15/26	1,554,162
1,045,000	Summit Hotel Properties, Inc.	1.50%	02/15/26	1,122,569
				3,570,023
	Health Care Equipment & Supplies – 6.0%
1,150,000	CONMED Corp.	2.63%	02/01/24	1,975,182
843,000	Cutera, Inc. (b)	2.25%	03/15/26	1,262,642
260,000	DexCom, Inc.	0.75%	12/01/23	986,213
4,385,000	DexCom, Inc.	0.25%	11/15/25	5,619,604
605,000	Envista Holdings Corp.	2.38%	06/01/25	1,185,923
1,700,000	Insulet Corp.	0.38%	09/01/26	2,530,130
1,105,000	Integra LifeSciences Holdings Corp.	0.50%	08/15/25	1,203,676
1,090,000	Novocure, Ltd.	(c)	11/01/25	1,115,564
900,000	NuVasive, Inc.	0.38%	03/15/25	852,750
1,087,000	Tandem Diabetes Care, Inc. (b)	1.50%	05/01/25	1,519,735
				18,251,419
	Health Care Providers & Services – 1.0%
293,000	Anthem, Inc.	2.75%	10/15/42	1,806,186
1,150,000	Guardant Health, Inc. (b)	(c)	11/15/27	1,272,233
				3,078,419
	Hotels, Restaurants & Leisure – 5.3%
1,500,000	Airbnb, Inc. (b)	(c)	03/15/26	1,472,266
1,775,000	Booking Holdings, Inc.	0.75%	05/01/25	2,642,075
1,195,000	MakeMyTrip Ltd. (b)	(c)	02/15/28	1,266,445
825,000	Marriott Vacations Worldwide Corp. (b)	(c)	01/15/26	929,403
2,715,000	NCL Corp., Ltd.	5.38%	08/01/25	4,535,889
295,000	Penn National Gaming, Inc.	2.75%	05/15/26	931,735
2,190,000	Royal Caribbean Cruises Ltd.	4.25%	06/15/23	2,964,882
1,410,000	Vail Resorts, Inc. (b)	(c)	01/01/26	1,559,103
				16,301,798
	Independent Power & Renewable Electricity Producers – 0.6%
1,230,000	Sunnova Energy International, Inc. (b)	0.25%	12/01/26	1,751,687
	Interactive Media & Services – 3.6%
1,801,000	Match Group Financeco 2, Inc. (b)	0.88%	06/15/26	3,280,670
1,120,000	Snap, Inc.	0.75%	08/01/26	2,681,538
1,850,000	Snap, Inc. (b)	(c)	05/01/27	1,882,576
1,300,000	Twitter, Inc.	0.25%	06/15/24	1,537,250
1,120,000	Ziff Davis, Inc. (b)	1.75%	11/01/26	1,531,800
				10,913,834
	Internet & Direct Marketing Retail – 3.1%
3,305,000	Etsy, Inc.	0.13%	09/01/27	4,902,388
307,000	MercadoLibre, Inc.	2.00%	08/15/28	1,040,399
700,000	Wayfair, Inc.	1.13%	11/01/24	1,540,300
2,000,000	Wayfair, Inc.	0.63%	10/01/25	1,980,180
				9,463,267
	IT Services – 6.7%
1,160,000	Akamai Technologies, Inc.	0.13%	05/01/25	1,426,264
3,085,000	Cloudflare, Inc. (b)	(c)	08/15/26	3,898,385
691,000	MongoDB, Inc.	0.25%	01/15/26	1,738,883

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See Notes to Financial Statements

Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Portfolio of Investments (Continued)

October 31, 2021

Principal Value	Description	Stated Coupon	Stated Maturity	Value
CONVERTIBLE CORPORATE BONDS (Continued)
	IT Services (Continued)
$2,050,000	Okta, Inc.	0.13%	09/01/25	$2,981,441
1,130,000	Shift4Payments, Inc. (b)	(c)	12/15/25	1,231,022
1,190,000	Shopify, Inc.	0.13%	11/01/25	1,515,762
930,000	Square, Inc.	0.50%	05/15/23	3,041,681
3,800,000	Square, Inc. (b)	0.25%	11/01/27	4,609,974
				20,443,412
	Leisure Products – 0.3%
570,000	Callaway Golf Co.	2.75%	05/01/26	983,333
	Life Sciences Tools & Services – 1.0%
558,000	Illumina, Inc.	(c)	08/15/23	656,224
1,260,000	NeoGenomics, Inc.	0.25%	01/15/28	1,278,902
410,000	Repligen Corp.	0.38%	07/15/24	1,039,596
				2,974,722
	Machinery – 2.1%
885,000	Chart Industries, Inc. (b)	1.00%	11/15/24	2,688,869
960,000	Greenbrier Cos., Inc (The) (b)	2.88%	04/15/28	1,001,420
1,345,000	John Bean Technologies Corp. (b)	0.25%	05/15/26	1,459,742
760,000	Middleby Corp. (The)	1.00%	09/01/25	1,146,297
				6,296,328
	Marine – 0.4%
890,000	Seaspan Corp. (b)	3.75%	12/15/25	1,087,946
	Media – 2.4%
2,645,000	DISH Network Corp. (b)	(c)	12/15/25	3,048,442
424,000	Liberty Interactive LLC (b)	1.75%	09/30/46	843,693
1,280,000	Liberty Media Corp.	1.38%	10/15/23	1,856,831
1,085,000	TechTarget, Inc. (b)	0.13%	12/15/25	1,596,360
				7,345,326
	Metals & Mining – 1.6%
420,000	Allegheny Technologies, Inc.	3.50%	06/15/25	548,663
680,000	Cleveland-Cliffs, Inc.	1.50%	01/15/25	2,119,302
848,000	Ivanhoe Mines Ltd. (b)	2.50%	04/15/26	1,105,622
1,150,000	MP Materials Corp. (b)	0.25%	04/01/26	1,208,098
				4,981,685
	Mortgage Real Estate Investment Trusts – 0.3%
800,000	Hannon Armstrong Sustainable Infrastructure Capital, Inc.	(c)	08/15/23	1,047,040
	Oil, Gas & Consumable Fuels – 3.6%
313,000	Antero Resources Corp.	4.25%	09/01/26	1,469,334
1,016,000	Centennial Resource Production LLC	3.25%	04/01/28	1,412,158
575,000	CNX Resources Corp.	2.25%	05/01/26	781,472
790,000	EQT Corp.	1.75%	05/01/26	1,238,573
615,000	Green Plains, Inc. (b)	4.00%	07/01/24	1,550,309
2,585,000	Pioneer Natural Resources Co.	0.25%	05/15/25	4,581,313
				11,033,159
	Personal Products – 0.6%
1,505,000	Beauty Health Co. (The) (b)	1.25%	10/01/26	1,715,741
	Professional Services – 1.2%
725,000	FTI Consulting, Inc.	2.00%	08/15/23	1,072,761

See Notes to Financial Statements

Page 9

Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Portfolio of Investments (Continued)

October 31, 2021

Principal Value	Description	Stated Coupon	Stated Maturity	Value
CONVERTIBLE CORPORATE BONDS (Continued)
	Professional Services (Continued)
$675,000	KBR, Inc.	2.50%	11/01/23	$1,154,585
1,465,000	Upwork, Inc. (b)	0.25%	08/15/26	1,575,471
				3,802,817
	Real Estate Management & Development – 1.3%
1,425,000	Realogy Group LLC/Realogy Co-Issuer Corp. (b)	0.25%	06/15/26	1,455,621
1,350,000	Zillow Group, Inc.	2.75%	05/15/25	2,357,505
				3,813,126
	Road & Rail – 1.3%
1,410,000	Lyft, Inc.	1.50%	05/15/25	1,965,973
1,955,000	Uber Technologies, Inc. (b)	(c)	12/15/25	1,890,536
				3,856,509
	Semiconductors & Semiconductor Equipment – 4.8%
405,000	Enphase Energy, Inc. (b)	0.25%	03/01/25	1,175,411
1,875,000	Enphase Energy, Inc. (b)	(c)	03/01/28	2,110,990
720,000	MACOM Technology Solutions Holdings, Inc. (b)	0.25%	03/15/26	792,540
1,185,000	Microchip Technology, Inc.	1.63%	02/15/27	2,605,595
740,000	Nova Ltd.	(c)	10/15/25	1,116,438
995,000	ON Semiconductor Corp.	1.63%	10/15/23	2,343,109
1,540,000	ON Semiconductor Corp. (b)	(c)	05/01/27	1,858,626
640,000	SMART Global Holdings, Inc.	2.25%	02/15/26	955,200
387,000	Teradyne, Inc.	1.25%	12/15/23	1,664,003
				14,621,912
	Software – 13.9%
1,625,000	Avalara, Inc. (b)	0.25%	08/01/26	1,705,085
1,446,000	Bentley Systems, Inc. (b)	0.13%	01/15/26	1,648,440
915,000	Bill.com Holdings, Inc. (b)	(c)	12/01/25	1,771,120
1,735,000	Bill.com Holdings, Inc. (b)	(c)	04/01/27	1,863,353
450,000	Blackline, Inc.	0.13%	08/01/24	801,723
962,000	Box, Inc. (b)	(c)	01/15/26	1,149,590
366,000	Cerence, Inc.	3.00%	06/01/25	1,061,482
1,500,000	Coupa Software, Inc.	0.38%	06/15/26	1,649,140
925,000	Datadog, Inc.	0.13%	06/15/25	1,756,371
1,260,000	DocuSign, Inc. (b)	(c)	01/15/24	1,332,948
1,524,000	Dropbox, Inc. (b)	(c)	03/01/28	1,666,710
950,000	HubSpot, Inc.	0.38%	06/01/25	2,740,280
975,000	LivePerson, Inc. (b)	(c)	12/15/26	957,188
975,000	Mitek Systems, Inc. (b)	0.75%	02/01/26	1,103,382
1,475,000	Nutanix, Inc. (b)	0.25%	10/01/27	1,401,090
4,040,000	Palo Alto Networks, Inc.	0.75%	07/01/23	7,780,608
1,056,000	Rapid7, Inc. (b)	0.25%	03/15/27	1,455,274
235,000	ServiceNow, Inc.	(c)	06/01/22	1,216,024
2,770,000	Splunk, Inc.	0.50%	09/15/23	3,469,741
1,360,000	Workday, Inc.	0.25%	10/01/22	2,687,768
955,000	Zendesk, Inc.	0.63%	06/15/25	1,128,695
990,000	Zscaler, Inc.	0.13%	07/01/25	2,140,545
				42,486,557
	Specialty Retail – 2.4%
818,000	Burlington Stores, Inc.	2.25%	04/15/25	1,176,218
740,000	Dick’s Sporting Goods, Inc.	3.25%	04/15/25	2,822,014
1,400,000	Dufry One BV (CHF) (a)	0.75%	03/30/26	1,490,963

Page 10

See Notes to Financial Statements

Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Portfolio of Investments (Continued)

October 31, 2021

Principal Value	Description	Stated Coupon	Stated Maturity	Value
CONVERTIBLE CORPORATE BONDS (Continued)
	Specialty Retail (Continued)
$585,000	RH	(c)	06/15/23	$1,987,538
				7,476,733
	Technology Hardware, Storage & Peripherals – 0.3%
690,000	Pure Storage, Inc.	0.13%	04/15/23	825,516
	Total Convertible Corporate Bonds			250,573,164
	(Cost $196,220,680)
Shares	Description	Stated Rate	Stated Maturity (d)	Value
CONVERTIBLE PREFERRED SECURITIES – 14.6%
	Auto Components – 1.1%
17,180	Aptiv PLC, Series A	5.50%	06/15/23	3,319,176
	Capital Markets – 1.5%
610	Cowen, Inc., Series A	5.63%	(e)	908,269
37,250	KKR & Co., Inc., Series C	6.00%	09/15/23	3,726,490
				4,634,759
	Electric Utilities – 1.1%
60,670	NextEra Energy, Inc.	5.28%	03/01/23	3,304,695
	Food Products – 0.5%
12,325	Bunge Ltd.	4.88%	(e)	1,566,754
	Health Care Equipment & Supplies – 0.8%
20,750	Boston Scientific Corp., Series A	5.50%	06/01/23	2,428,580
	Internet & Direct Marketing Retail – 0.3%
625	2020 Mandatory Exchangeable Trust (b)	6.50%	05/16/23	1,072,017
	Life Sciences Tools & Services – 3.3%
34,275	Avantor, Inc., Series A	6.25%	05/15/22	4,242,559
1,550	Danaher Corp., Series A	4.75%	04/15/22	3,232,138
1,645	Danaher Corp., Series B	5.00%	04/15/23	2,729,055
				10,203,752
	Machinery – 1.4%
7,150	Colfax Corp.	5.75%	01/15/22	1,492,205
10,065	RBC Bearings, Inc., Series A	5.00%	10/15/24	1,203,673
13,300	Stanley Black & Decker, Inc.	5.25%	11/15/22	1,435,336
				4,131,214
	Media – 0.5%
23,025	ViacomCBS, Inc., Series A	5.75%	04/01/24	1,396,006
	Metals & Mining – 0.5%
19,850	ArcelorMittal S.A.	5.50%	05/18/23	1,602,689
	Pharmaceuticals – 0.4%
21,725	Elanco Animal Health, Inc.	5.00%	02/01/23	1,101,023
	Semiconductors & Semiconductor Equipment – 2.4%
4,380	Broadcom, Inc., Series A	8.00%	09/30/22	7,346,749

See Notes to Financial Statements

Page 11

Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Portfolio of Investments (Continued)

October 31, 2021

Shares	Description	Stated Rate	Stated Maturity (d)	Value
CONVERTIBLE PREFERRED SECURITIES (Continued)
	Wireless Telecommunication Services – 0.8%
2,215	2020 Cash Mandatory Exchangeable Trust (b)	5.25%	06/01/23	$2,323,551
	Total Convertible Preferred Securities			44,430,965
	(Cost $32,687,669)
	Total Investments – 96.6%			295,004,129
	(Cost $228,908,349) (f)

	Net Other Assets and Liabilities – 3.4%		10,456,163
	Net Assets – 100.0%		$305,460,292


(a)	This security may be resold to qualified foreign investors and foreign institutional buyers under Regulation S of the Securities Act of 1933, as amended (the “1933 Act”).
(b)	This security, sold within the terms of a private placement memorandum, is exempt from registration upon resale under Rule 144A under the 1933 Act, and may be resold in transactions exempt from registration, normally to qualified institutional buyers. Pursuant to procedures adopted by the Trust’s Board of Trustees, this security has been determined to be liquid by SSI Investment Management LLC (“SSI”), the Fund’s sub-advisor. Although market instability can result in periods of increased overall market illiquidity, liquidity for each security is determined based on security specific factors and assumptions, which require subjective judgment. At October 31, 2021, securities noted as such amounted to $87,791,414 or 28.7% of net assets.
(c)	Zero coupon security.
(d)	Stated maturity represents the mandatory conversion date.
(e)	Perpetual maturity.
(f)	Aggregate cost for federal income tax purposes was $233,675,685. As of October 31, 2021, the aggregate gross unrealized appreciation for all investments in which there was an excess of value over tax cost was $64,152,570 and the aggregate gross unrealized depreciation for all investments in which there was an excess of tax cost over value was $2,824,126. The net unrealized appreciation was $61,328,444.

CHF	Swiss Franc
EUR	Euro

Valuation Inputs

A summary of the inputs used to value the Fund’s investments as of October 31, 2021 is as follows (see Note 2A - Portfolio Valuation in the Notes to Financial Statements):

	Total Value at 10/31/2021	Level 1 Quoted Prices	Level 2 Significant Observable Inputs	Level 3 Significant Unobservable Inputs
Convertible Corporate Bonds*	$ 250,573,164	$ —	$ 250,573,164	$ —
Convertible Preferred Securities:
Capital Markets	4,634,759	3,726,490	908,269	—
Food Products	1,566,754	—	1,566,754	—
Internet & Direct Marketing Retail	1,072,017	—	1,072,017	—
Life Sciences Tools & Services	10,203,752	7,474,697	2,729,055	—
Wireless Telecommunication Services	2,323,551	—	2,323,551	—
Other industry categories*	24,630,132	24,630,132	—	—
Total Investments	$ 295,004,129	$ 35,831,319	$ 259,172,810	$—

*	See Portfolio of Investments for industry breakout.

Page 12

See Notes to Financial Statements

Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

Financial Highlights

For a share outstanding throughout each period

	Year Ended October 31,
	2021	2020	2019	2018	2017
Net asset value, beginning of period	$ 40.14	$ 31.57	$ 28.72	$ 29.01	$ 25.21
Income from investment operations:
Net investment income (loss)	(1.33)	(0.55)	(0.24)	(0.09)	(0.14)
Net realized and unrealized gain (loss)	14.42	9.65	3.58	0.52	4.45
Total from investment operations	13.09	9.10	3.34	0.43	4.31
Distributions paid to shareholders from:
Net investment income	(0.62)	(0.53)	(0.49)	(0.67)	(0.51)
Net realized gain	(0.39)	—	—	(0.05)	—
Total distributions	(1.01)	(0.53)	(0.49)	(0.72)	(0.51)
Net asset value, end of period	$52.22	$40.14	$31.57	$28.72	$29.01
Total return (a)	32.74%	29.10%	11.72%	1.46%	17.29%
Ratios to average net assets/supplemental data:
Net assets, end of period (in 000’s)	$ 305,460	$ 236,802	$ 194,158	$ 202,467	$ 58,016
Ratio of total expenses to average net assets	0.95%	0.95%	0.95%	0.95%	0.95%
Ratio of net investment income (loss) to average net assets	(2.60)%	(1.36)%	(0.63)%	(2.16)%	(1.86)%
Portfolio turnover rate (b)	135%	119%	64%	71%	56%

(a)

Total return is calculated assuming an initial investment made at the net asset value at the beginning of the period, reinvestment of all distributions at net asset value during the period, and redemption at net asset value on the last day of the period. The returns presented do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Total return is calculated for the time period presented and is not annualized for periods of less than a year.

(b)

Portfolio turnover is calculated for the time period presented and is not annualized for periods of less than a year and does not include securities received or delivered from processing creations or redemptions and in-kind transactions.

Page 16

See Notes to Financial Statements

Table of Contents

Notes to Financial Statements

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021

1. Organization

First Trust Exchange-Traded Fund IV (the “Trust”) is an open-end management investment company organized as a Massachusetts business trust on September 15, 2010, and is registered with the Securities and Exchange Commission (“SEC”) under the Investment Company Act of 1940, as amended (the “1940 Act”).

The Trust currently consists of ten funds that are offering shares. This report covers the First Trust SSI Strategic Convertible Securities ETF (the “Fund”), a diversified series of the Trust, which trades under the ticker “FCVT” on The Nasdaq Stock Market LLC (“Nasdaq”). Unlike conventional mutual funds, the Fund issues and redeems shares on a continuous basis, at net asset value (“NAV”), only in large blocks of shares known as “Creation Units.”

The Fund is an actively managed exchange-traded fund. The investment objective of the Fund is to seek total return. Under normal market conditions, the Fund seeks to achieve its investment objective by investing at least 80% of its net assets (including investment borrowings) in a portfolio of U.S. and non-U.S. convertible securities. There can be no assurances that the Fund will achieve its investment objective. The Fund may not be appropriate for all investors.

2. Significant Accounting Policies

The Fund is considered an investment company and follows accounting and reporting guidance under Financial Accounting Standards Board Accounting Standards Codification Topic 946, “Financial Services-Investment Companies.” The following is a summary of significant accounting policies consistently followed by the Fund in the preparation of the financial statements. The preparation of the financial statements in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts and disclosures in the financial statements. Actual results could differ from those estimates.

A. Portfolio Valuation

The Fund’s NAV is determined daily as of the close of regular trading on the New York Stock Exchange (“NYSE”), normally 4:00 p.m. Eastern time, on each day the NYSE is open for trading. If the NYSE closes early on a valuation day, the NAV is determined as of that time. Domestic debt securities are priced using data reflecting the earlier closing of the principal markets for those securities. The Fund’s NAV is calculated by dividing the value of all assets of the Fund (including accrued interest and dividends), less all liabilities (including accrued expenses and dividends declared but unpaid), by the total number of shares outstanding.

The Fund’s investments are valued daily at market value or, in the absence of market value with respect to any portfolio securities, at fair value. Market value prices represent last sale or official closing prices from a national or foreign exchange (i.e., a regulated market) and are primarily obtained from third-party pricing services. Fair value prices represent any prices not considered market value prices and are either obtained from a third-party pricing service or are determined by the Pricing Committee of the Fund’s investment advisor, First Trust Advisors L.P. (“First Trust” or the “Advisor”), in accordance with valuation procedures adopted by the Trust’s Board of Trustees, and in accordance with provisions of the 1940 Act. Investments valued by the Advisor’s Pricing Committee, if any, are footnoted as such in the footnotes to the Portfolio of Investments. The Fund’s investments are valued as follows:

Convertible preferred stocks and other equity securities listed on any national or foreign exchange (excluding Nasdaq and the London Stock Exchange Alternative Investment Market (“AIM”)) are valued at the last sale price on the exchange on which they are principally traded or, for Nasdaq and AIM securities, the official closing price. Securities traded on more than one securities exchange are valued at the last sale price or official closing price, as applicable, at the close of the securities exchange representing the principal market for such securities.

Convertible corporate bonds, notes and other debt securities are fair valued on the basis of valuations provided by dealers who make markets in such securities or by a third-party pricing service approved by the Trust’s Board of Trustees, which may use the following valuation inputs when available:

1)	benchmark yields;
2)	reported trades;
3)	broker/dealer quotes;
4)	issuer spreads;
5)	benchmark securities;
6)	bids and offers; and
7)	reference data including market research publications.

Securities traded in an over-the-counter market are fair valued at the mean of their most recent bid and asked price, if available, and otherwise at their closing bid price.

Page 17

Table of Contents

Notes to Financial Statements (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021

Fixed income and other debt securities having a remaining maturity of sixty days or less when purchased are fair valued at cost adjusted for amortization of premiums and accretion of discounts (amortized cost), provided the Advisor’s Pricing Committee has determined that the use of amortized cost is an appropriate reflection of fair value given market and issuer-specific conditions existing at the time of the determination. Factors that may be considered in determining the appropriateness of the use of amortized cost include, but are not limited to, the following:

1)	the credit conditions in the relevant market and changes thereto;
2)	the liquidity conditions in the relevant market and changes thereto;
3)	the interest rate conditions in the relevant market and changes thereto (such as significant changes in interest rates);
4)	issuer-specific conditions (such as significant credit deterioration); and
5)	any other market-based data the Advisor’s Pricing Committee considers relevant. In this regard, the Advisor’s Pricing Committee may use last-obtained market-based data to assist it when valuing portfolio securities using amortized cost.

Certain securities may not be able to be priced by pre-established pricing methods. Such securities may be valued by the Trust’s Board of Trustees or its delegate, the Advisor’s Pricing Committee, at fair value. These securities generally include, but are not limited to, restricted securities (securities which may not be publicly sold without registration under the Securities Act of 1933, as amended) for which a third-party pricing service is unable to provide a market price; securities whose trading has been formally suspended; a security whose market or fair value price is not available from a pre-established pricing source; a security with respect to which an event has occurred that is likely to materially affect the value of the security after the market has closed but before the calculation of the Fund’s NAV or make it difficult or impossible to obtain a reliable market quotation; and a security whose price, as provided by the third-party pricing service, does not reflect the security’s fair value. As a general principle, the current fair value of a security would appear to be the amount which the owner might reasonably expect to receive for the security upon its current sale. When fair value prices are used, generally they will differ from market quotations or official closing prices on the applicable exchanges. A variety of factors may be considered in determining the fair value of such securities.

Fair valuation of a debt security will be based on the consideration of all available information, including, but not limited to, the following:

1)	the fundamental business data relating to the issuer;
2)	an evaluation of the forces which influence the market in which these securities are purchased and sold;
3)	the type, size and cost of the security;
4)	the financial statements of the issuer;
5)	the credit quality and cash flow of the issuer, based on the sub-advisor’s or external analysis;
6)	the information as to any transactions in or offers for the security;
7)	the price and extent of public trading in similar securities (or equity securities) of the issuer/borrower, or comparable companies;
8)	the coupon payments;
9)	the quality, value and salability of collateral, if any, securing the security;
10)	the business prospects of the issuer, including any ability to obtain money or resources from a parent or affiliate and an assessment of the issuer’s management;
11)	the prospects for the issuer’s industry, and multiples (of earnings and/or cash flows) being paid for similar businesses in that industry; and
12)	other relevant factors.

Fair valuation of an equity security will be based on the consideration of all available information, including, but not limited to, the following:

1)	the type of security;
2)	the size of the holding;
3)	the initial cost of the security;
4)	transactions in comparable securities;
5)	price quotes from dealers and/or third-party pricing services;
6)	relationships among various securities;
7)	information obtained by contacting the issuer, analysts, or the appropriate stock exchange;
8)	an analysis of the issuer’s financial statements; and
9)	the existence of merger proposals or tender offers that might affect the value of the security.

Page 18

Table of Contents

Notes to Financial Statements (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021

The Fund is subject to fair value accounting standards that define fair value, establish the framework for measuring fair value and provide a three-level hierarchy for fair valuation based upon the inputs to the valuation as of the measurement date. The three levels of the fair value hierarchy are as follows:

•	Level 1 – Level 1 inputs are quoted prices in active markets for identical investments. An active market is a market in which transactions for the investment occur with sufficient frequency and volume to provide pricing information on an ongoing basis.
•	Level 2 – Level 2 inputs are observable inputs, either directly or indirectly, and include the following:

o	Quoted prices for similar investments in active markets.
o	Quoted prices for identical or similar investments in markets that are non-active. A non-active market is a market where there are few transactions for the investment, the prices are not current, or price quotations vary substantially either over time or among market makers, or in which little information is released publicly.
o	Inputs other than quoted prices that are observable for the investment (for example, interest rates and yield curves observable at commonly quoted intervals, volatilities, prepayment speeds, loss severities, credit risks, and default rates).
o	Inputs that are derived principally from or corroborated by observable market data by correlation or other means.

•	Level 3 – Level 3 inputs are unobservable inputs. Unobservable inputs may reflect the reporting entity’s own assumptions about the assumptions that market participants would use in pricing the investment.

The inputs or methodologies used for valuing investments are not necessarily an indication of the risk associated with investing in those investments. A summary of the inputs used to value the Fund’s investments as of October 31, 2021, is included with the Fund’s Portfolio of Investments.

B. Securities Transactions and Investment Income

Securities transactions are recorded as of the trade date. Realized gains and losses from securities transactions are recorded on the identified cost basis. Dividend income is recorded on the ex-dividend date. Interest income is recorded daily on the accrual basis. Amortization of premiums and accretion of discounts are recorded using the effective interest method.

The Fund invests in convertible securities that are acquired at a price significantly above the principal value. Consequently, the amortization of premium may exceed the interest income earned on the securities.

C. Foreign Currency

The books and records of the Fund are maintained in U.S. dollars. Foreign currencies, investments and other assets and liabilities are translated into U.S. dollars at the exchange rates prevailing at the end of the period. Purchases and sales of investments and items of income and expense are translated on the respective dates of such transactions. Unrealized gains and losses on assets and liabilities, other than investments in securities, which result from changes in foreign currency exchange rates have been included in “Net change in unrealized appreciation (depreciation) on foreign currency translation” on the Statement of Operations. Unrealized gains and losses on investments in securities which result from changes in foreign exchange rates are included with fluctuations arising from changes in market price and are shown in “Net change in unrealized appreciation (depreciation) on investments” on the Statement of Operations. Net realized foreign currency gains and losses include the effect of changes in exchange rates between trade date and settlement date on investment security transactions, foreign currency transactions and interest and dividends received and are shown in “Net realized gain (loss) on foreign currency transactions” on the Statement of Operations. The portion of foreign currency gains and losses related to fluctuation in exchange rates between the initial purchase settlement date and subsequent sale trade date is included in “Net realized gain (loss) on investments” on the Statement of Operations.

D. Dividends and Distributions to Shareholders

Dividends from net investment income, if any, are declared and paid monthly by the Fund, or as the Board of Trustees may determine from time to time. Distributions of net realized capital gains earned by the Fund, if any, are distributed at least annually.

Distributions from net investment income and realized capital gains are determined in accordance with federal income tax regulations, which may differ from U.S. GAAP. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These permanent differences are primarily due to the varying treatment of income and gain/loss on portfolio securities held by the Fund and have no impact on net assets or NAV per share. Temporary differences, which arise from recognizing certain items of income, expense and gain/loss in different periods for financial statement and tax purposes, will reverse at some time in the future.

Page 19

Table of Contents

Notes to Financial Statements (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021

The tax character of distributions paid by the Fund during the fiscal years ended October 31, 2021 and 2020, was as follows:

Distributions paid from:	2021	2020
Ordinary income	$3,695,653	$3,308,156
Capital gains	2,284,319	—
Return of capital	—	—

As of October 31, 2021, the components of distributable earnings on a tax basis were as follows:

Undistributed ordinary income	$—
Accumulated capital and other gain (loss)	50,680,223
Net unrealized appreciation (depreciation)	61,328,448

E. Income Taxes

The Fund intends to continue to qualify as a regulated investment company by complying with the requirements under Subchapter M of the Internal Revenue Code of 1986, as amended, which includes distributing substantially all of its net investment income and net realized gains to shareholders. Accordingly, no provision has been made for federal and state income taxes. However, due to the timing and amount of distributions, the Fund may be subject to an excise tax of 4% of the amount by which approximately 98% of the Fund’s taxable income exceeds the distributions from such taxable income for the calendar year.

The Fund intends to utilize provisions of the federal income tax laws, which allow it to carry a realized capital loss forward indefinitely following the year of the loss and offset such loss against any future realized capital gains. The Fund is subject to certain limitations under U.S. tax rules on the use of capital loss carryforwards and net unrealized built-in losses. These limitations apply when there has been a 50% change in ownership. At October 31, 2021, for federal income tax purposes, the Fund had no capital loss carryforwards available to the extent provided by regulations to offset future capital gains.

Certain losses realized during the current fiscal year may be deferred and treated as occurring on the first day of the following fiscal year for federal income tax purposes. For the fiscal year ended October 31, 2021, the Fund had no net ordinary losses.

The Fund is subject to accounting standards that establish a minimum threshold for recognizing, and a system for measuring, the benefits of a tax position taken or expected to be taken in a tax return. Taxable years ended 2018, 2019, 2020, and 2021 remain open to federal and state audit. As of October 31, 2021, management has evaluated the application of these standards to the Fund, and has determined that no provision for income tax is required in the Fund’s financial statements for uncertain tax positions.

In order to present paid-in capital and accumulated distributable earnings (loss) (which consists of accumulated net investment income (loss), accumulated net realized gain (loss) on investments and net unrealized appreciation (depreciation) on investments) on the Statement of Assets and Liabilities that more closely represent their tax character, certain adjustments have been made to paid-in capital, accumulated net investment income (loss) and accumulated net realized gain (loss) on investments. These adjustments are primarily due to the difference between book and tax treatments of income and gains on various investment securities held by the Fund and in-kind transactions. The results of operations and net assets were not affected by these adjustments. For the fiscal year ended October 31, 2021, the adjustments for the Fund were as follows:

Accumulated Net Investment Income (Loss)		Accumulated Net Realized Gain (Loss) on Investments		Paid-in Capital
$10,604,283		$(24,774,567)		$14,170,284

F. Expenses

Expenses, other than the investment advisory fee and other excluded expenses, are paid by the Advisor (See Note 3).

3. Investment Advisory Fee, Affiliated Transactions and Other Fee Arrangements

First Trust, the investment advisor to the Fund, is a limited partnership with one limited partner, Grace Partners of DuPage L.P., and one general partner, The Charger Corporation. The Charger Corporation is an Illinois corporation controlled by James A. Bowen, Chief Executive Officer of First Trust. First Trust is responsible for supervising the selection and ongoing monitoring of the securities

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Notes to Financial Statements (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021

in the Fund’s portfolio, managing the Fund’s business affairs and providing certain administrative services necessary for the management of the Fund.

The Fund and First Trust have retained SSI Investment Management LLC (“SSI” or the “Sub-Advisor”) to serve as its investment sub-advisor. In this capacity, SSI is responsible for the selection and on-going monitoring of the securities in the Fund’s investment portfolio. Pursuant to the Investment Management Agreement between the Trust and the Advisor, First Trust will supervise SSI and its management of the investment of the Fund’s assets and will pay SSI for its services as the Fund’s sub-advisor. First Trust will also be responsible for the Fund’s expenses, including the cost of transfer agency, custody, fund administration, legal, audit and other services, but excluding fee payments under the Investment Management Agreement, interest, taxes, acquired fund fees and expenses, brokerage commissions and other expenses connected with the execution of portfolio transactions, distribution and service fees pursuant to a Rule 12b-1 plan, if any, and extraordinary expenses. The Fund has agreed to pay First Trust an annual unitary management fee equal to 0.95% of its average daily net assets. SSI receives a sub-advisory fee from First Trust equal to 50% of any remaining monthly investment management fee paid to First Trust after the average Fund expenses accrued during the most recent twelve months are subtracted from the investment management fee in a given month. First Trust also provides fund reporting services to the Fund for a flat annual fee in the amount of $9,250, which is covered under the annual unitary management fee.

The Trust has multiple service agreements with Brown Brothers Harriman & Co. (“BBH”). Under the service agreements, BBH performs custodial, fund accounting, certain administrative services, and transfer agency services for the Fund. As custodian, BBH is responsible for custody of the Fund’s assets. As fund accountant and administrator, BBH is responsible for maintaining the books and records of the Fund’s securities and cash. As transfer agent, BBH is responsible for maintaining shareholder records for the Fund.

Each Trustee who is not an officer or employee of First Trust, any sub-advisor or any of their affiliates (“Independent Trustees”) is paid a fixed annual retainer that is allocated equally among each fund in the First Trust Fund Complex. Each Independent Trustee is also paid an annual per fund fee that varies based on whether the fund is a closed-end or other actively managed fund, a defined-outcome fund or an index fund.

Additionally, the Lead Independent Trustee and the Chairs of the Audit Committee, Nominating and Governance Committee and Valuation Committee are paid annual fees to serve in such capacities, with such compensation allocated pro rata among each fund in the First Trust Fund Complex based on net assets. Independent Trustees are reimbursed for travel and out-of-pocket expenses in connection with all meetings. The Lead Independent Trustee and Committee Chairs rotate every three years. The officers and “Interested” Trustee receive no compensation from the Trust for acting in such capacities.

4. Purchases and Sales of Securities

The cost of purchases and proceeds from sales of securities, excluding short-term investments and in-kind transactions, for the fiscal year ended October 31, 2021, were $386,570,370 and $399,902,685, respectively.

For the fiscal year ended October 31, 2021, the Fund had no in-kind transactions.

5. Creations, Redemptions and Transaction Fees

The Fund generally issues and redeems its shares in primary market transactions through a creation and redemption mechanism and does not sell or redeem individual shares. Instead, financial entities known as “Authorized Participants” have contractual arrangements with the Fund or one of the Fund’s service providers to purchase and redeem Fund shares directly with the Fund in large blocks of shares known as “Creation Units.” Prior to the start of trading on every business day, the Fund publishes through the National Securities Clearing Corporation (“NSCC”) the “basket” of securities, cash or other assets that it will accept in exchange for a Creation Unit of the Fund’s shares. An Authorized Participant that wishes to effectuate a creation of the Fund’s shares deposits with the Fund the “basket” of securities, cash or other assets identified by the Fund that day, and then receives the Creation Unit of the Fund’s shares in return for those assets. After purchasing a Creation Unit, the Authorized Participant may continue to hold the Fund’s shares or sell them in the secondary market. The redemption process is the reverse of the purchase process: the Authorized Participant redeems a Creation Unit of the Fund’s shares for a basket of securities, cash or other assets. The combination of the creation and redemption process with secondary market trading in the Fund’s shares and underlying securities provides arbitrage opportunities that are designed to help keep the market price of the Fund’s shares at or close to the NAV per share of the Fund.

The Fund imposes fees in connection with the purchase of Creation Units. These fees may vary based upon various fact-based circumstances, including, but not limited to, the composition of the securities included in the Creation Unit or the countries in which the transactions are settled. The price for each Creation Unit will equal the daily NAV per share of the Fund times the number of shares in a Creation Unit, plus the fees described above and, if applicable, any operational processing and brokerage costs, transfer fees, stamp taxes and part or all of the spread between the expected bid and offer side of the market related to the securities comprising the creation basket.

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Notes to Financial Statements (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021

The Fund also imposes fees in connection with the redemption of Creation Units. These fees may vary based upon various fact-based circumstances, including, but not limited to, the composition of the securities included in the Creation Unit or the countries in which the transactions are settled. The price received for each Creation Unit will equal the daily NAV per share of the Fund times the number of shares in a Creation Unit, minus the fees described above and, if applicable, any operational processing and brokerage costs, transfer fees, stamp taxes and part or all of the spread between the expected bid and offer side of the market related to the securities comprising the redemption basket. Investors who use the services of a broker or other such intermediary in addition to an Authorized Participant to effect a redemption of a Creation Unit may also be assessed an amount to cover the cost of such services. The redemption fee charged by the Fund will comply with Rule 22c-2 of the 1940 Act which limits redemption fees to no more than 2% of the value of the shares redeemed.

6. Distribution Plan

The Board of Trustees adopted a Distribution and Service Plan pursuant to Rule 12b-1 under the 1940 Act. In accordance with the Rule 12b-1 plan, the Fund is authorized to pay an amount up to 0.25% of its average daily net assets each year to reimburse First Trust Portfolios L.P. (“FTP”), the distributor of the Fund, for amounts expended to finance activities primarily intended to result in the sale of Creation Units or to provide investor services. FTP may also use this amount to compensate securities dealers or other persons that are Authorized Participants for providing distribution assistance, including broker-dealer and shareholder support and educational and promotional services.

No 12b-1 fees are currently paid by the Fund, and pursuant to a contractual arrangement, no 12b-1 fees will be paid any time before March 31, 2023.

7. Indemnification

The Trust, on behalf of the Fund, has a variety of indemnification obligations under contracts with its service providers. The Trust’s maximum exposure under these arrangements is unknown. However, the Trust has not had prior claims or losses pursuant to these contracts and expects the risk of loss to be remote.

8. Subsequent Events

Management has evaluated the impact of all subsequent events to the Fund through the date the financial statements were issued, and has determined that there was the following subsequent event:

On November 18, 2021, First Trust Limited Duration Investment Grade Corporate ETF, an additional series of the Trust, began trading under the symbol “FSIG” on NYSE Arca, Inc.

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Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Trustees of First Trust Exchange-Traded Fund IV:

Opinion on the Financial Statements and Financial Highlights

We have audited the accompanying statement of assets and liabilities of First Trust SSI Strategic Convertible Securities ETF (the “Fund”), a series of the First Trust Exchange-Traded Fund IV, including the portfolio of investments, as of October 31, 2021, the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended, and the related notes. In our opinion, the financial statements and financial highlights present fairly, in all material respects, the financial position of the Fund as of October 31, 2021, and the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements and financial highlights are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements and financial highlights based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement, whether due to error or fraud. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Fund’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements and financial highlights, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements and financial highlights. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements and financial highlights. Our procedures included confirmation of securities owned as of October 31, 2021, by correspondence with the custodian and brokers, when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.

Chicago, Illinois

December 22, 2021

We have served as the auditor of one or more First Trust investment companies since 2001.

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Additional Information

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

Proxy Voting Policies and Procedures

A description of the policies and procedures that the Trust uses to determine how to vote proxies and information on how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available (1) without charge, upon request, by calling (800) 988-5891; (2) on the Fund’s website at www.ftportfolios.com; and (3) on the Securities and Exchange Commission’s (“SEC”) website at www.sec.gov.

Portfolio Holdings

The Fund files portfolio holdings information for each month in a fiscal quarter within 60 days after the end of the relevant fiscal quarter on Form N-PORT. Portfolio holdings information for the third month of each fiscal quarter will be publicly available on the SEC’s website at www.sec.gov. The Fund’s complete schedule of portfolio holdings for the second and fourth quarters of each fiscal year is included in the semi-annual and annual reports to shareholders, respectively, and is filed with the SEC on Form N-CSR. The semi-annual and annual report for the Fund is available to investors within 60 days after the period to which it relates. The Fund’s Forms N-PORT and Forms N-CSR are available on the SEC’s website listed above.

Federal Tax Information

For the taxable year ended October 31, 2021, the following percentages of income dividend paid by the Fund qualify for the dividends received deduction available to corporations and are hereby designated as qualified dividend income:

Dividends Received Deduction		Qualified Dividend Income
5.21%		5.17%

A portion of the ordinary dividends (including short-term capital gains) that the Fund paid to shareholders during the taxable year ended October 31, 2021, may be eligible for the Qualified Business Income (QBI) Deduction under the Internal Revenue Code of 1986, as amended, section 199A for the aggregate dividends the Fund received from the underlying Real Estate Investment Trusts (REITs) it invests in.

Risk Considerations

Risks are inherent in all investing. Certain general risks that may be applicable to a Fund are identified below, but not all of the material risks relevant to each Fund are included in this report and not all of the risks below apply to each Fund. The material risks of investing in each Fund are spelled out in its prospectus, statement of additional information and other regulatory filings. Before investing, you should consider each Fund’s investment objective, risks, charges and expenses, and read each Fund’s prospectus and statement of additional information carefully. You can download each Fund’s prospectus at www.ftportfolios.com or contact First Trust Portfolios L.P. at (800) 621-1675 to request a prospectus, which contains this and other information about each Fund.

Concentration Risk. To the extent that a fund is able to invest a significant percentage of its assets in a single asset class or the securities of issuers within the same country, state, region, industry or sector, an adverse economic, business or political development may affect the value of the fund’s investments more than if the fund were more broadly diversified. A fund that tracks an index will be concentrated to the extent the fund’s corresponding index is concentrated. A concentration makes a fund more susceptible to any single occurrence and may subject the fund to greater market risk than a fund that is more broadly diversified.

Credit Risk. Credit risk is the risk that an issuer of a security will be unable or unwilling to make dividend, interest and/or principal payments when due and the related risk that the value of a security may decline because of concerns about the issuer’s ability to make such payments.

Cyber Security Risk. The funds are susceptible to potential operational risks through breaches in cyber security. A breach in cyber security refers to both intentional and unintentional events that may cause a fund to lose proprietary information, suffer data corruption or lose operational capacity. Such events could cause a fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. In addition, cyber security breaches of a fund’s third-party service providers, such as its administrator, transfer agent, custodian, or sub-advisor, as applicable, or issuers in which the fund invests, can also subject a fund to many of the same risks associated with direct cyber security breaches.

Defined Outcome Funds Risk. To the extent a fund’s investment strategy is designed to deliver returns tied to the price performance of an underlying ETF, an investor may not realize the returns the fund seeks to achieve if that investor does not hold shares for the entire target outcome period. In the event an investor purchases shares after the first day of the target outcome period or sells shares prior to the end of the target outcome period, the buffer that the fund seeks to provide against a decline in the value of the underlying

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Additional Information (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

ETF may not be available, the enhanced returns that the fund seeks to provide (if any) may not be available and the investor may not participate in a gain in the value of the underlying ETF up to the cap for the investor’s investment period. Additionally, the fund will not participate in gains of the underlying ETF above the cap and a shareholder may lose their entire investment. If the fund seeks enhanced returns, there are certain time periods when the value of the fund may fall faster than the value of the underlying ETF, and it is very unlikely that, on any given day during which the underlying ETF share price increases in value, the fund’s share price will increase at the same rate as the enhanced returns sought by the fund, which is designed for an entire target outcome period. Trading flexible exchange options involves risks different from, or possibly greater than, the risks associated with investing directly in securities, such as less liquidity and correlation and valuation risks. A fund may experience substantial downside from specific flexible exchange option positions and certain positions may expire worthless.

Derivatives Risk. To the extent a fund uses derivative instruments such as futures contracts, options contracts and swaps, the fund may experience losses because of adverse movements in the price or value of the underlying asset, index or rate, which may be magnified by certain features of the derivative. These risks are heightened when a fund’s portfolio managers use derivatives to enhance the fund’s return or as a substitute for a position or security, rather than solely to hedge (or offset) the risk of a position or security held by the fund.

Equity Securities Risk. To the extent a fund invests in equity securities, the value of the fund’s shares will fluctuate with changes in the value of the equity securities. Equity securities prices fluctuate for several reasons, including changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant stock market, such as market volatility, or when political or economic events affecting the issuers occur. In addition, common stock prices may be particularly sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase. Equity securities may decline significantly in price over short or extended periods of time, and such declines may occur in the equity market as a whole, or they may occur in only a particular country, company, industry or sector of the market.

ETF Risk. The shares of an ETF trade like common stock and represent an interest in a portfolio of securities. The risks of owning an ETF generally reflect the risks of owning the underlying securities, although lack of liquidity in an ETF could result in it being more volatile and ETFs have management fees that increase their costs. Shares of an ETF trade on an exchange at market prices rather than net asset value, which may cause the shares to trade at a price greater than net asset value (premium) or less than net asset value (discount). In times of market stress, decisions by market makers to reduce or step away from their role of providing a market for an ETF’s shares, or decisions by an ETF’s authorized participants that they are unable or unwilling to proceed with creation and/or redemption orders of an ETF’s shares, could result in shares of the ETF trading at a discount to net asset value and in greater than normal intraday bid-ask spreads.

Fixed Income Securities Risk. To the extent a fund invests in fixed income securities, the fund will be subject to credit risk, income risk, interest rate risk, liquidity risk and prepayment risk. Income risk is the risk that income from a fund’s fixed income investments could decline during periods of falling interest rates. Interest rate risk is the risk that the value of a fund’s fixed income securities will decline because of rising interest rates. Liquidity risk is the risk that a security cannot be purchased or sold at the time desired, or cannot be purchased or sold without adversely affecting the price. Prepayment risk is the risk that the securities will be redeemed or prepaid by the issuer, resulting in lower interest payments received by the fund. In addition to these risks, high yield securities, or “junk” bonds, are subject to greater market fluctuations and risk of loss than securities with higher ratings, and the market for high yield securities is generally smaller and less liquid than that for investment grade securities.

Index or Model Constituent Risk. Certain funds may be a constituent of one or more indices or ETF models. As a result, such a fund may be included in one or more index-tracking exchange-traded funds or mutual funds. Being a component security of such a vehicle could greatly affect the trading activity involving a fund, the size of the fund and the market volatility of the fund. Inclusion in an index could increase demand for the fund and removal from an index could result in outsized selling activity in a relatively short period of time. As a result, a fund’s net asset value could be negatively impacted and the fund’s market price may be significantly below its net asset value during certain periods. In addition, index rebalances may potentially result in increased trading activity in a fund’s shares.

Index Provider Risk. To the extent a fund seeks to track an index, it is subject to Index Provider Risk. There is no assurance that the Index Provider will compile the Index accurately, or that the Index will be determined, maintained, constructed, reconstituted, rebalanced, composed, calculated or disseminated accurately. To correct any such error, the Index Provider may carry out an unscheduled rebalance or other modification of the Index constituents or weightings, which may increase the fund’s costs. The Index Provider does not provide any representation or warranty in relation to the quality, accuracy or completeness of data in the Index, and it does not guarantee that the Index will be calculated in accordance with its stated methodology. Losses or costs associated with any Index Provider errors generally will be borne by the fund and its shareholders.

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Additional Information (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

Investment Companies Risk. To the extent a fund invests in the securities of other investment vehicles, the fund will incur additional fees and expenses that would not be present in a direct investment in those investment vehicles. Furthermore, the fund’s investment performance and risks are directly related to the investment performance and risks of the investment vehicles in which the fund invests.

LIBOR Risk. To the extent a fund invests in floating or variable rate obligations that use the London Interbank Offered Rate (“LIBOR”) as a reference interest rate, it is subject to LIBOR Risk. The United Kingdom’s Financial Conduct Authority, which regulates LIBOR, will cease making LIBOR available as a reference rate over a phase-out period that will begin immediately after December 31, 2021. The unavailability or replacement of LIBOR may affect the value, liquidity or return on certain fund investments and may result in costs incurred in connection with closing out positions and entering into new trades. Any potential effects of the transition away from LIBOR on the fund or on certain instruments in which the fund invests can be difficult to ascertain, and they may vary depending on a variety of factors, and they could result in losses to the fund.

Management Risk. To the extent that a fund is actively managed, it is subject to management risk. In managing an actively-managed fund’s investment portfolio, the fund’s portfolio managers will apply investment techniques and risk analyses that may not have the desired result. There can be no guarantee that a fund will meet its investment objective.

Market Risk. Securities held by a fund, as well as shares of a fund itself, are subject to market fluctuations caused by factors such as general economic conditions, political events, regulatory or market developments, changes in interest rates and perceived trends in securities prices. Shares of a fund could decline in value or underperform other investments as a result of the risk of loss associated with these market fluctuations. In addition, local, regional or global events such as war, acts of terrorism, spread of infectious diseases or other public health issues, recessions, or other events could have a significant negative impact on a fund and its investments. Such events may affect certain geographic regions, countries, sectors and industries more significantly than others. The outbreak of the respiratory disease designated as COVID-19 in December 2019 has caused significant volatility and declines in global financial markets, which have caused losses for investors. While the development of vaccines has slowed the spread of the virus and allowed for the resumption of “reasonably” normal business activity in the United States, many countries continue to impose lockdown measures in an attempt to slow the spread. Additionally, there is no guarantee that vaccines will be effective against emerging variants of the disease.

Non-U.S. Securities Risk. To the extent a fund invests in non-U.S. securities, it is subject to additional risks not associated with securities of domestic issuers. Non-U.S. securities are subject to higher volatility than securities of domestic issuers due to: possible adverse political, social or economic developments; restrictions on foreign investment or exchange of securities; capital controls; lack of liquidity; currency exchange rates; excessive taxation; government seizure of assets; the imposition of sanctions by foreign governments; different legal or accounting standards; and less government supervision and regulation of exchanges in foreign countries. Investments in non-U.S. securities may involve higher costs than investments in U.S. securities, including higher transaction and custody costs, as well as additional taxes imposed by non-U.S. governments. These risks may be heightened for securities of companies located, or with significant operations, in emerging market countries.

Operational Risk. Each fund is subject to risks arising from various operational factors, including, but not limited to, human error, processing and communication errors, errors of a fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. Each fund relies on third-parties for a range of services, including custody. Any delay or failure relating to engaging or maintaining such service providers may affect a fund’s ability to meet its investment objective. Although the funds and the funds’ investment advisor seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.

Passive Investment Risk. To the extent a fund seeks to track an index, the fund will invest in the securities included in, or representative of, the index regardless of their investment merit. A fund generally will not attempt to take defensive positions in declining markets.

NOT FDIC INSURED

NOT BANK GUARANTEED

MAY LOSE VALUE

Advisory and Sub-Advisory Agreements

Board Considerations Regarding Approval of Continuation of Investment Management and Sub-Advisory Agreements

The Board of Trustees of First Trust Exchange-Traded Fund IV (the “Trust”), including the Independent Trustees, unanimously approved the continuation of the Investment Management Agreement (the “Advisory Agreement”) with First Trust Advisors L.P. (the “Advisor”) on behalf of the First Trust SSI Strategic Convertible Securities ETF (the “Fund”) and the Investment Sub-Advisory Agreement (the “Sub-Advisory Agreement” and together with the Advisory Agreement, the “Agreements”) among the Trust, on behalf of the Fund, the Advisor and SSI Investment Management LLC (the “Sub-Advisor”). The Board approved the continuation of the Agreements for a one-year period ending June 30, 2022 at a meeting held on June 6–7, 2021. The Board determined that the

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Additional Information (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

continuation of the Agreements is in the best interests of the Fund in light of the nature, extent and quality of the services provided and such other matters as the Board considered to be relevant in the exercise of its business judgment.

To reach this determination, the Board considered its duties under the Investment Company Act of 1940, as amended (the “1940 Act”), as well as under the general principles of state law, in reviewing and approving advisory contracts; the requirements of the 1940 Act in such matters; the fiduciary duty of investment advisors with respect to advisory agreements and compensation; the standards used by courts in determining whether investment company boards have fulfilled their duties; and the factors to be considered by the Board in voting on such agreements. At meetings held on April 26, 2021 and June 6–7, 2021, the Board, including the Independent Trustees, reviewed materials provided by the Advisor and the Sub-Advisor responding to requests for information from counsel to the Independent Trustees, submitted on behalf of the Independent Trustees, that, among other things, outlined: the services provided by the Advisor and the Sub-Advisor to the Fund (including the relevant personnel responsible for these services and their experience); the unitary fee rate payable by the Fund as compared to fees charged to a peer group of funds (the “Expense Group”) and a broad peer universe of funds (the “Expense Universe”), each assembled by Broadridge Financial Solutions, Inc. (“Broadridge”), an independent source, and as compared to fees charged to other clients of the Advisor, including other exchange-traded funds (“ETFs”) managed by the Advisor; the sub-advisory fee rate as compared to fees charged to other clients of the Sub-Advisor; the expense ratio of the Fund as compared to expense ratios of the funds in the Fund’s Expense Group and Expense Universe; performance information for the Fund, including comparisons of the Fund’s performance to that of one or more relevant benchmark indexes and to that of a performance group of funds and a broad performance universe of funds (the “Performance Universe”), each assembled by Broadridge; the nature of expenses incurred in providing services to the Fund and the potential for the Advisor and the Sub-Advisor to realize economies of scale, if any; profitability and other financial data for the Advisor; financial data for the Sub-Advisor; any fall-out benefits to the Advisor and its affiliate, First Trust Portfolios L.P. (“FTP”), and the Sub-Advisor; and information on the Advisor’s and the Sub-Advisor’s compliance programs. The Board reviewed initial materials with the Advisor at the meeting held on April 26, 2021, prior to which the Independent Trustees and their counsel met separately to discuss the information provided by the Advisor and the Sub-Advisor. Following the April meeting, counsel to the Independent Trustees, on behalf of the Independent Trustees, requested certain clarifications and supplements to the materials provided, and the information provided in response to those requests was considered at an executive session of the Independent Trustees and their counsel held prior to the June 6–7, 2021 meeting, as well as at the June meeting. The Board applied its business judgment to determine whether the arrangements between the Trust and the Advisor and among the Trust, the Advisor and the Sub-Advisor continue to be reasonable business arrangements from the Fund’s perspective. The Board determined that, given the totality of the information provided with respect to the Agreements, the Board had received sufficient information to renew the Agreements. The Board considered that shareholders chose to invest or remain invested in the Fund knowing that the Advisor and the Sub-Advisor manage the Fund and knowing the Fund’s unitary fee.

In reviewing the Agreements, the Board considered the nature, extent and quality of the services provided by the Advisor and the Sub-Advisor under the Agreements. With respect to the Advisory Agreement, the Board considered that the Advisor is responsible for the overall management and administration of the Trust and the Fund and reviewed all of the services provided by the Advisor to the Fund, including the oversight of the Sub-Advisor, as well as the background and experience of the persons responsible for such services. The Board noted that the Advisor oversees the Sub-Advisor’s day-to-day management of the Fund’s investments, including portfolio risk monitoring and performance review. In reviewing the services provided, the Board noted the compliance program that had been developed by the Advisor and considered that it includes a robust program for monitoring the Advisor’s, the Sub-Advisor’s and the Fund’s compliance with the 1940 Act, as well as the Fund’s compliance with its investment objective, policies and restrictions. The Board also considered a report from the Advisor with respect to its risk management functions related to the operation of the Fund. Finally, as part of the Board’s consideration of the Advisor’s services, the Advisor, in its written materials and at the April 26, 2021 meeting, described to the Board the scope of its ongoing investment in additional personnel and infrastructure to maintain and improve the quality of services provided to the Fund and the other funds in the First Trust Fund Complex. With respect to the Sub-Advisory Agreement, the Board noted that the Fund is an actively-managed ETF and the Sub-Advisor actively manages the Fund’s investments. The Board reviewed the materials provided by the Sub-Advisor and considered the services that the Sub-Advisor provides to the Fund, including the Sub-Advisor’s day-to-day management of the Fund’s investments. In considering the Sub-Advisor’s management of the Fund, the Board noted the background and experience of the Sub-Advisor’s portfolio management team, including the Board’s prior meetings with members of the portfolio management team. In light of the information presented and the considerations made, the Board concluded that the nature, extent and quality of the services provided to the Trust and the Fund by the Advisor and the Sub-Advisor under the Agreements have been and are expected to remain satisfactory and that the Sub-Advisor, under the oversight of the Advisor, has managed the Fund consistent with its investment objective, policies and restrictions.

The Board considered the unitary fee rate payable by the Fund under the Advisory Agreement for the services provided. The Board noted that the sub-advisory fee is paid by the Advisor from the unitary fee. The Board considered that as part of the unitary fee the Advisor is responsible for the Fund’s expenses, including the cost of sub-advisory, transfer agency, custody, fund administration, legal, audit and other services and license fees, if any, but excluding the fee payment under the Advisory Agreement and interest, taxes, brokerage commissions and other expenses connected with the execution of portfolio transactions, distribution and service fees

Page 27

Table of Contents

Additional Information (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

pursuant to a Rule 12b-1 plan, if any, and extraordinary expenses, if any. The Board received and reviewed information showing the advisory fee rates and expense ratios of the peer funds in the Expense Group, as well as advisory and unitary fee rates charged by the Advisor to other fund (including ETFs) and non-fund clients, as applicable. Because the Fund pays a unitary fee, the Board determined that expense ratios were the most relevant comparative data point. Based on the information provided, the Board noted that the unitary fee rate for the Fund was above the median total (net) expense ratio of the peer funds in the Expense Group. With respect to the Expense Group, the Board, at the April 26, 2021 meeting, discussed with the Advisor limitations in creating peer groups for actively-managed ETFs, including that all peer funds in the Expense Group were open-end mutual funds, and different business models that may affect the pricing of services among ETF sponsors. The Board also noted that not all peer funds employ an advisor/sub-advisor management structure. The Board took these limitations and differences into account in considering the peer data. With respect to fees charged to other non-ETF clients, the Board considered differences between the Fund and other non-ETF clients that limited their comparability. In considering the unitary fee rate overall, the Board also considered the Advisor’s statement that it seeks to meet investor needs through innovative and value-added investment solutions and the Advisor’s demonstrated long-term commitment to the Fund and the other funds in the First Trust Fund Complex.

The Board considered performance information for the Fund. The Board noted the process it has established for monitoring the Fund’s performance and portfolio risk on an ongoing basis, which includes quarterly performance reporting from the Advisor and Sub-Advisor for the Fund. The Board determined that this process continues to be effective for reviewing the Fund’s performance. The Board received and reviewed information comparing the Fund’s performance for periods ended December 31, 2020 to the performance of the funds in the Performance Universe and to that of a benchmark index. Based on the information provided, the Board noted that the Fund outperformed the Performance Universe median for the one-, three- and five-year periods ended December 31, 2020. The Board also noted that the Fund outperformed the benchmark index for the one- and three-year periods ended December 31, 2020 and underperformed the benchmark index for the five-year period ended December 31, 2020.

On the basis of all the information provided on the unitary fee and performance of the Fund and the ongoing oversight by the Board, the Board concluded that the unitary fee for the Fund (out of which the Sub-Advisor is compensated) continues to be reasonable and appropriate in light of the nature, extent and quality of the services provided by the Advisor and the Sub-Advisor to the Fund under the Agreements.

The Board considered information and discussed with the Advisor whether there were any economies of scale in connection with providing advisory services to the Fund and noted the Advisor’s statement that it believes its expenses will likely increase during the next twelve months as the Advisor continues to hire personnel and build infrastructure, including technology, to improve the services to the Fund. The Board noted that any reduction in fixed costs associated with the management of the Fund would benefit the Advisor, but that the unitary fee structure provides a level of certainty in expenses for the Fund. The Board considered the revenues and allocated costs (including the allocation methodology) of the Advisor in serving as investment advisor to the Fund for the twelve months ended December 31, 2020 and the estimated profitability level for the Fund calculated by the Advisor based on such data, as well as complex-wide and product-line profitability data, for the same period. The Board noted the inherent limitations in the profitability analysis and concluded that, based on the information provided, the Advisor’s profitability level for the Fund was not unreasonable. In addition, the Board considered fall-out benefits described by the Advisor that may be realized from its relationship with the Fund. The Board considered that the Advisor had identified as a fall-out benefit to the Advisor and FTP their exposure to investors and brokers who, absent their exposure to the Fund, may have had no dealings with the Advisor or FTP. The Board also considered the Advisor’s compensation for fund reporting services provided to the Fund pursuant to a separate Fund Reporting Services Agreement, which is paid from the unitary fee. The Board concluded that the character and amount of potential fall-out benefits to the Advisor were not unreasonable.

The Board considered the Sub-Advisor’s statements that it has some fixed and some variable expenses in connection with providing services to the Fund, and that it expects its expenses related to the Fund to be materially greater in 2021 than they were in 2020. The Board did not review the profitability of the Sub-Advisor with respect to the Fund. The Board noted that the Advisor pays the Sub-Advisor from its unitary fee and its understanding that the Fund’s sub-advisory fee rate was the product of an arm’s length negotiation. The Board concluded that the profitability analysis for the Advisor was more relevant. The Board considered the potential fall-out benefits to the Sub-Advisor from being associated with the Advisor and the Fund. The Board noted that the Sub-Advisor experiences fall-out benefits in the form of soft dollar commissions generated by the Fund and considered a summary of the Sub-Advisor’s soft dollar arrangements. The Board concluded that the character and amount of potential fall-out benefits to the Sub-Advisor were not unreasonable.

Based on all of the information considered and the conclusions reached, the Board, including the Independent Trustees, unanimously determined that the terms of the Agreements continue to be fair and reasonable and that the continuation of the Agreements is in the best interests of the Fund. No single factor was determinative in the Board’s analysis.

Page 28

Table of Contents

Board of Trustees and Officers

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

The following tables identify the Trustees and Officers of the Trust. Unless otherwise indicated, the address of all persons is 120 East Liberty Drive, Suite 400, Wheaton, IL 60187.

The Trust’s statement of additional information includes additional information about the Trustees and is available, without charge, upon request, by calling (800) 988-5891.

Name, Year of Birth and Position with the Trust	Term of Office and Year First Elected or Appointed	Principal Occupations During Past 5 Years	Number of Portfolios in the First Trust Fund Complex Overseen by Trustee	Other Trusteeships or Directorships Held by Trustee During Past 5 Years
INDEPENDENT TRUSTEES
Richard E. Erickson, Trustee (1951)	• Indefinite Term • Since Inception	Physician; Officer, Wheaton Orthopedics; Limited Partner, Gundersen Real Estate Limited Partnership (June 1992 to December 2016)	215	None
Thomas R. Kadlec, Trustee (1957)	• Indefinite Term • Since Inception	President, ADM Investor Services, Inc. (Futures Commission Merchant)	215	Director of ADM Investor Services, Inc., ADM Investor Services International, Futures Industry Association, and National Futures Association
Robert F. Keith, Trustee (1956)	• Indefinite Term • Since Inception	President, Hibs Enterprises (Financial and Management Consulting)	215	Director of Trust Company of Illinois
Niel B. Nielson, Trustee (1954)	• Indefinite Term • Since Inception	Senior Advisor (August 2018 to Present), Managing Director and Chief Operating Officer (January 2015 to August 2018), Pelita Harapan Educational Foundation (Educational Products and Services)	215	None
INTERESTED TRUSTEE
James A. Bowen⁽¹⁾, Trustee and Chairman of the Board (1955)	• Indefinite Term • Since Inception	Chief Executive Officer, First Trust Advisors L.P. and First Trust Portfolios L.P.; Chairman of the Board of Directors, BondWave LLC (Software Development Company) and Stonebridge Advisors LLC (Investment Advisor)	215	None

⁽¹⁾	Mr. Bowen is deemed an “interested person” of the Trust due to his position as CEO of First Trust Advisors L.P., investment advisor of the Trust.

Page 30

Table of Contents

Board of Trustees and Officers (Continued)

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

Name and Year of Birth	Position and Offices with Trust	Term of Office and Length of Service	Principal Occupations During Past 5 Years
OFFICERS⁽²⁾
James M. Dykas (1966)	President and Chief Executive Officer	• Indefinite Term • Since January 2016	Managing Director and Chief Financial Officer (January 2016 to Present), Controller (January 2011 to January 2016), Senior Vice President (April 2007 to January 2016), First Trust Advisors L.P. and First Trust Portfolios L.P.; Chief Financial Officer (January 2016 to Present), BondWave LLC (Software Development Company) and Stonebridge Advisors LLC (Investment Advisor)
Donald P. Swade (1972)	Treasurer, Chief Financial Officer and Chief Accounting Officer	• Indefinite Term • Since January 2016	Senior Vice President (July 2016 to Present), Vice President (April 2012 to July 2016), First Trust Advisors L.P. and First Trust Portfolios L.P.
W. Scott Jardine (1960)	Secretary and Chief Legal Officer	• Indefinite Term • Since Inception	General Counsel, First Trust Advisors L.P. and First Trust Portfolios L.P.; Secretary and General Counsel, BondWave LLC; Secretary, Stonebridge Advisors LLC
Daniel J. Lindquist (1970)	Vice President	• Indefinite Term • Since Inception	Managing Director, First Trust Advisors L.P. and First Trust Portfolios L.P.
Kristi A. Maher (1966)	Chief Compliance Officer and Assistant Secretary	• Indefinite Term • Since Inception	Deputy General Counsel, First Trust Advisors L.P. and First Trust Portfolios L.P.

Roger F. Testin (1966)	Vice President	• Indefinite Term • Since Inception	Senior Vice President, First Trust Advisors L.P. and First Trust Portfolios L.P.
Stan Ueland (1970)	Vice President	• Indefinite Term • Since Inception	Senior Vice President, First Trust Advisors L.P. and First Trust Portfolios L.P

⁽²⁾	The term “officer” means the president, vice president, secretary, treasurer, controller or any other officer who performs a policy making function.

Page 31

Table of Contents

First Trust SSI Strategic Convertible Securities ETF (FCVT)

October 31, 2021 (Unaudited)

First Trust values our relationship with you and considers your privacy an important priority in maintaining that relationship. We are committed to protecting the security and confidentiality of your personal information.

Sources of Information

We collect nonpublic personal information about you from the following sources:

•	Information we receive from you and your broker-dealer, investment professional or financial representative through interviews, applications, agreements or other forms;
•	Information about your transactions with us, our affiliates or others;
•	Information we receive from your inquiries by mail, e-mail or telephone; and
•	Information we collect on our website through the use of “cookies”. For example, we may identify the pages on our website that your browser requests or visits.

Information Collected

The type of data we collect may include your name, address, social security number, age, financial status, assets, income, tax information, retirement and estate plan information, transaction history, account balance, payment history, investment objectives, marital status, family relationships and other personal information.

Disclosure of Information

We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. In addition to using this information to verify your identity (as required under law), the permitted uses may also include the disclosure of such information to unaffiliated companies for the following reasons:

•

In order to provide you with products and services and to effect transactions that you request or authorize, we may disclose your personal information as described above to unaffiliated financial service providers and other companies that perform administrative or other services on our behalf, such as transfer agents, custodians and trustees, or that assist us in the distribution of investor materials such as trustees, banks, financial representatives, proxy services, solicitors and printers.

•

We may release information we have about you if you direct us to do so, if we are compelled by law to do so, or in other legally limited circumstances (for example to protect your account from fraud).

In addition, in order to alert you to our other financial products and services, we may share your personal information within First Trust.

Use of Website Analytics

We currently use third party analytics tools, Google Analytics and AddThis, to gather information for purposes of improving First Trust’s website and marketing our products and services to you. These tools employ cookies, which are small pieces of text stored in a file by your web browser and sent to websites that you visit, to collect information, track website usage and viewing trends such as the number of hits, pages visited, videos and PDFs viewed and the length of user sessions in order to evaluate website performance and enhance navigation of the website. We may also collect other anonymous information, which is generally limited to technical and web navigation information such as the IP address of your device, internet browser type and operating system for purposes of analyzing the data to make First Trust’s website better and more useful to our users. The information collected does not include any personal identifiable information such as your name, address, phone number or email address unless you provide that information through the website for us to contact you in order to answer your questions or respond to your requests. To find out how to opt-out of these services click on: Google Analytics and AddThis.

Confidentiality and Security

With regard to our internal security procedures, First Trust restricts access to your nonpublic personal information to those First Trust employees who need to know that information to provide products or services to you. We maintain physical, electronic and procedural safeguards to protect your nonpublic personal information.

Policy Updates and Inquiries

As required by federal law, we will notify you of our privacy policy annually. We reserve the right to modify this policy at any time, however, if we do change it, we will tell you promptly. For questions about our policy, or for additional copies of this notice, please go to www.ftportfolios.com, or contact us at 1-800-621-1675 (First Trust Portfolios) or 1-800-222-6822 (First Trust Advisors).

March 2021

Page 32

ASSETS:
Investments, at value (Cost $228,908,349)	$ 295,004,129
Cash	10,216,913
Foreign currency (Cost $5,628)	5,734
Receivables:
Investment securities sold	3,328,364
Interest	478,757
Dividends	48,889
Total Assets	309,082,786
LIABILITIES:
Payables:
Investment securities purchased	3,379,719
Investment advisory fees	242,775
Total Liabilities	3,622,494
NET ASSETS	$305,460,292
NET ASSETS consist of:
Paid-in capital	$ 193,393,121
Par value	58,500
Accumulated distributable earnings (loss)	112,008,671
NET ASSETS	$305,460,292
NET ASSET VALUE, per share	$52.22
Number of shares outstanding (unlimited number of shares authorized, par value $0.01 per share)	5,850,002

INVESTMENT INCOME:
Dividends		$ 1,536,517
Interest		(6,422,146)
Total investment income		(4,885,629)
EXPENSES:
Investment advisory fees		2,821,244
Total expenses		2,821,244
NET INVESTMENT INCOME (LOSS)		(7,706,873)
NET REALIZED AND UNREALIZED GAIN (LOSS):
Net realized gain (loss) on:
Investments		75,472,351
Foreign currency transactions		(1,482)
Net realized gain (loss)		75,470,869
Net change in unrealized appreciation (depreciation) on:
Investments		8,568,790
Foreign currency translation		4
Net change in unrealized appreciation (depreciation)		8,568,794
NET REALIZED AND UNREALIZED GAIN (LOSS)		84,039,663
NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS		$ 76,332,790

	Year Ended 10/31/2021	Year Ended 10/31/2020
OPERATIONS:
Net investment income (loss)	$ (7,706,873)	$ (2,981,635)
Net realized gain (loss)	75,470,869	9,201,568
Net change in unrealized appreciation (depreciation)	8,568,794	39,005,257
Net increase (decrease) in net assets resulting from operations	76,332,790	45,225,190
DISTRIBUTIONS TO SHAREHOLDERS FROM:
Investment operations	(5,979,972)	(3,308,156)
SHAREHOLDER TRANSACTIONS:
Proceeds from shares sold	134,102,148	106,145,960
Cost of shares redeemed	(135,796,752)	(105,418,747)
Net increase (decrease) in net assets resulting from shareholder transactions	(1,694,604)	727,213
Total increase (decrease) in net assets	68,658,214	42,644,247
NET ASSETS:
Beginning of period	236,802,078	194,157,831
End of period	$305,460,292	$236,802,078
CHANGES IN SHARES OUTSTANDING:
Shares outstanding, beginning of period	5,900,002	6,150,002
Shares sold	2,650,000	3,050,000
Shares redeemed	(2,700,000)	(3,300,000)
Shares outstanding, end of period	5,850,002	5,900,002