Aerospace & Defense Portfolio, Series 31
Ticker Symbol: FNWIDX

The deferred sales charge will be deducted in three monthly installments commencing 6/18/21.

When the public offering price is less than or equal to $10.00 per unit, there will be no initial sales charge. If the price exceeds $10.00 per unit, you will pay an initial sales charge.

The maximum sales charge for investors in fee accounts consists of the creation and development fee. Investors in fee accounts are not assessed any transactional sales charges. Standard accounts sales charges apply to units purchased as an ineligible asset.

The creation and development fee is a charge of $0.050 per unit collected at the end of the initial offering period. If the price you pay exceeds $10.00 per unit, the creation and development fee will be less than 0.50%; if the price you pay is less than $10.00 per unit, the creation and development fee will exceed 0.50%.

In addition to the sales charges listed, UITs are subject to annual operating expenses and organization costs.

You should carefully consider the portfolio's investment objectives, risks, and charges and expenses before investing. Contact your financial professional or call First Trust Portfolios L.P. at 1.800.621.1675 to request a prospectus, which contains this and other information about the portfolio. Read it carefully before you invest.

Risk Considerations
An investment in this unmanaged unit investment trust should be made with an understanding of the risks involved with owning common stocks, such as an economic recession and the possible deterioration of either the financial condition of the issuers of the equity securities or the general condition of the stock market.

You should be aware that an investment that is concentrated in stocks in the industrials sector involves additional risks, including limited diversification. The companies engaged in the industrials sector are subject to certain risks, including a deterioration in the general state of the economy, intense competition, domestic and international politics, excess capacity and changing spending trends.

The companies involved in the aerospace and defense industries are subject to fierce competition, consolidation, adverse political and government developments, substantial research and development costs, limited numbers of potential customers and excess capacity and spending trends. Their products and services may be subject to rapid obsolescence.

An investment in foreign equities should be made with an understanding of the additional risks involved with foreign issuers, such as currency fluctuations, political risk, withholding, the lack of adequate financial information, and exchange control restrictions impacting foreign issuers.

An investment in a portfolio containing small-cap and mid-cap companies is subject to additional risks, as the share prices of small-cap companies and certain mid-cap companies are often more volatile than those of larger companies due to several factors, including limited trading volumes, products, financial resources, management inexperience and less publicly available information.

Large capitalization companies may grow at a slower rate than the overall market.

The value of the securities held by the trust may be subject to steep declines or increased volatility due to changes in performance or perception of the issuers.

As the use of Internet technology has become more prevalent in the course of business, the trust has become more susceptible to potential operational risks through breaches in cybersecurity.

The COVID-19 global pandemic has resulted in major disruptions to economies and markets around the world. Financial markets have experienced extreme volatility and severe losses, negatively impacting global economic growth prospects. The duration of the COVID-19 outbreak and its effects cannot be determined with certainty and may exacerbate other political, social and economic risks.

This UIT is a buy and hold strategy and investors should consider their ability to hold the trust until maturity. There may be tax consequences unless units are purchased in an IRA or other qualified plan.