FDI Fort Dearborn Income Securities, Inc.

Goal

Putnam Global Sector Fund seeks capital appreciation.

Fees and expenses

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Putnam funds. More information about these and other discounts is available from your financial advisor and in How do I buy fund shares? beginning on page 22 of the fund’s prospectus and in How to buy shares beginning on page II-1 of the fund’s statement of additional information (SAI).

Shareholder fees (fees paid directly from your investment)

Annual fund operating expenses

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(expenses you pay each year as a percentage of the value of your investment)

    *  Applies only to certain redemptions of shares bought with no initial sales charge.

  **  This charge is phased out over six years.

***  This charge is eliminated after one year.

    #  Reflects Putnam Investment Management, LLC’s contractual obligation to limit certain fund expenses through February 28, 2015. This obligation may be modified or discontinued only with approval of the Board of Trustees.

Example

The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then, except as indicated, redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.

Portfolio turnover

The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when

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the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate in the most recent fiscal year was 52%.

Investments, risks, and performance

Investments

We allocate the fund’s assets among eight Putnam global sector funds to provide exposure to sectors of the global market in approximately the same proportions as the sector weightings in the MSCI World Index. Each underlying fund is a non-diversified fund concentrating in the market sector specified in its name, and each invests mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential.

Each underlying fund may invest in emerging markets, use derivatives, such as futures, options, foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes, and engage in short sales of securities.

We seek to rebalance the fund’s allocations monthly to remain in alignment with the index. The following table shows the fund’s approximate allocations to the underlying funds as of 12/31/2013.

We may also invest in money market securities or affiliated money market or short-term fixed income funds for cash management.

Risks

It is important to understand that you can lose money by investing in the fund.

Our allocation of investments among the underlying funds may hurt performance. In addition, the fund’s performance is subject to the risks that may affect the performance of the underlying funds, which are as follows. The value of stocks in an underlying fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including both general financial market conditions and factors related to a specific company or industry. Growth stocks may be more susceptible to earnings

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disappointments, and value stocks may fail to rebound. An underlying fund’s policy of concentrating on a limited group of industries and an underlying fund’s “non-diversified” status, which means the underlying fund may invest a greater percentage of its assets in fewer issuers than a “diversified” fund, can increase the underlying fund’s vulnerability to adverse developments affecting a single issuer, which may result in greater losses and volatility. The value of international investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation or deflation), and may be illiquid. An underlying fund’s use of derivatives may increase these risks by increasing investment exposure or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivatives positions and the potential failure of the other party to the instrument to meet its obligations. An underlying fund’s use of short selling may result in losses if the securities appreciate in value.

The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.