The following dates have been suggested to serve as Record and Ex-dividend/Payable dates for the Thornburg Value, Thornburg International Value, Thornburg Better World International, Thornburg Core Growth, Thornburg Investment Income Builder, Thornburg Global Opportunities, Thornburg International Growth and Thornburg Developing World Funds' income and capital gains distributions for the 2017 calendar year.

Type of Distribution: Record Date*: Ex-Dividend/Payable Date*:
First Quarter 2017 Income Dividend March 23, 2017 March 24, 2017
Second Quarter 2017 Income Dividend June 22, 2017 June 23, 2017
Third Quarter 2017 Income Dividend September 21, 2017 September 22, 2017
Fiscal Year 2017 Capital Gain Distribution
(If Applicable)
November 16, 2017 November 17, 2017
Fourth Quarter 2017 Income Dividend** December 21, 2017 December 22, 2017

**Please note that the Thornburg Investment Income Builder Fund will go ex-dividend on December 27, 2017.

Fourth Quarter 2017 Income Dividend December 26, 2017 December 27, 2017

* Please note that these dates are tentative and subject to change.
The Thornburg Investment Income Builder Fund will go Ex-Dividend with a daily accrual factor every day and pay quarterly on the above quarterly income dates.

Important Information
Before investing, carefully consider the Fund’s investment goals, risks, charges, and expenses. For a prospectus or summary prospectus containing this and other information, contact your financial advisor or visit Read them carefully before investing.

Investments carry risks, including possible loss of principal. Additional risks may be associated with investments outside the United States, especially in emerging markets, including currency fluctuations, illiquidity, volatility, and political and economic risks. Investments in small- and mid-capitalization companies may increase the risk of greater price fluctuations. Portfolios investing in bonds have the same interest rate, inflation, and credit risks that are associated with the underlying bonds. The value of bonds will fluctuate relative to changes in interest rates, decreasing when interest rates rise. Investments in the Funds are not FDIC insured, nor are they bank deposits or guaranteed by a bank or any other entity.

Thornburg mutual funds are distributed by Thornburg Securities Corporation.

Thornburg Investment Management, Inc. mutual funds are sold through investment professionals including investment advisors, brokerage firms, bank trust departments, trust companies and certain other financial intermediaries. Thornburg Securities Corporation (TSC) does not act as broker of record for investors.