SPDR Portfolio S&P 1500 Composite Stock Market ETF (SPTM) Exchange: NYSE ARCA

In seeking to track the performance of the SSGA Total Stock Market Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund generally invests substantially all, but at least 80%, of its total assets in the securities comprising the Index. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index (including common stock, preferred stock, depositary receipts and shares of other investment companies), cash and cash equivalents or money market instruments, such as repurchase agreements and money market funds (including money market funds advised by the Adviser). In seeking to track the Index, the Fund's assets will generally be concentrated in an industry or group of industries to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of the broad market segment of the U.S. equity market. The investible universe comprises all equity securities listed on major U.S. exchanges that are issued by companies either incorporated or headquartered in the U.S. and meet the following criteria as of the Index rebalance determination date: (i) a share price of at least $1.00, but not greater than $10,000; (ii) issued by a company with a total market capitalization of at least $100 million; and (iii) a free float ratio (percentage of common shares outstanding readily available in the market) of at least 25%. Additionally, securities included in the investible universe must meet the following minimum liquidity requirements during the six months leading up to the rebalance determination date: (i) the sum of the monthly median traded value divided by the month end security level free-float market capitalization (calculated by multiplying the number of shares readily available in the market by the price of such shares) is at least 10%; and (ii) the number of active trading days divided by the number of available trading days is at least 90%. The Index includes all securities in the investible universe. The Index is constructed to provide a comprehensive and unbiased barometer for the broad market segment of the U.S. equity market and is reconstituted semi-annually to ensure continued appropriate representation.The Index is weighted by float-adjusted market capitalization at each semi-annual rebalance. The Index rebalance date is the last business day in April and October. As of August 31, 2019, a significant portion of the Fund comprised companies in the technology sector, although this may change from time to time. As of August 31, 2019, the Index comprised 2,878 securities.The Index was created and is sponsored by State Street Global Advisors (the “Index Provider” or “SSGA”), an affiliate of the Fund and of SSGA FM, the Fund's Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.