TLT — iShares 20+ Year Treasury Bond ETF

The Fund seeks to track the investment results of the ICE® U.S. Treasury 20+ Year Bond Index (the “Underlying Index”), which measures the performance of public obligations of the U.S. Treasury that have a remaining maturity greater than or equal to twenty years. As of February 28, 2025, there were 40 issues in the Underlying Index. The Underlying Index consists of publicly-issued U.S. Treasury securities that have a remaining maturity greater than or equal to twenty years and have $300 million or more of outstanding face value, excluding amounts held by the Federal Reserve System (the “Fed”).

In addition, the securities in the Underlying Index must be fixed-rate and denominated in U.S. dollars. Excluded from the Underlying Index are inflation-linked securities, Treasury bills, cash management bills, any government agency debt issued with or without a government guarantee and zero-coupon issues that have been stripped from coupon-paying bonds. The Underlying Index is market value weighted, and the securities in the Underlying Index are updated on the last calendar day of each month.BFA uses an indexing approach to try to achieve the Fund’s investment objective.

The Fund does not try to “beat” the index it tracks and does not seek temporary defensive positions when markets decline or appear over valued.Indexing may eliminate the chance that the Fund will substantially outperform the Underlying Index but also may reduce some of the risks of active management, such as poor security selection. Indexing seeks to achieve lower costs and better after-tax performance by aiming to keep portfolio turnover low in comparison to actively managed investment companies.BFA uses a representative sampling indexing strategy to manage the Fund.

“Representative sampling” is an indexing strategy that involves investing in a representative sample of securities that collectively has an investment profile similar to that of an applicable underlying index. The securities selected are expected to have, in the aggregate, investment characteristics (based on factors such as market value and industry weigh tings), fundamental characteristics (such as return variability, duration (i.e., a security's price sensitivity to a change in interest rates), maturity or credit ratings and yield) and liquidity measures similar to those of an applicable underlying index.

The Fund may or may not hold all of the securities in the Underlying Index.The Fund will invest at least 80% of its assets in the component securities of the Underlying Index, and the Fund will invest at least 90% of its assets in U.S. Treasury securities that BFA believes will help the Fund track the Underlying Index. The Fund will invest no more than 10% of its assets in futures, options and swaps contracts that BFA believes will help the Fund track the Underlying Index.

Cash and cash equivalent investments associated with a derivative position will be treated as part of that position for the purposes of calculating the percentage of investments included in the Underlying Index. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund.The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).The Underlying Index is sponsored by ICE Data Indices, LLC (the “Index Provider” or “IDI”), which is independent of the Fund and BFA.

The Index Provider determines the composition and relative weigh tings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index.