FlexShares US Quality Low Volatility Index Fund (QLV) Exchange: NYSE ARCA

The Underlying Index is designed to reflect the performance of a selection of companies that, in aggregate, possess lower overall absolute volatility characteristics relative to the Northern Trust 1250 Index (the “Parent Index”), a float-adjusted market capitalization weighted index of U.S. domiciled large- and mid-capitalization companies. In addition, the Underlying Index is designed to select companies from the Parent Index that exhibit financial strength, stability and enhanced risk-return characteristics, which Northern Trust Investments, Inc. (“NTI” or the “Investment Adviser”) believes can provide equity-market participation while protecting against downside risks during certain market environments. To derive the Underlying Index, NTI, acting in its capacity as the index provider (the “Index Provider”) ranks all constituents of the Parent Index using a Northern Trust proprietary quality factor. This factor is a quantitative ranking based on: (a) management expertise (e.g. corporate finance activities); (b) profitability (e.g. reliability and sustainability of financial performance); and (c) cash flow (e.g., cash flow generation). The Index Provider then excludes the lowest quintile of constituents ranked according to the quality factor and uses an optimization process to select and weight eligible securities in order to (a) reduce overall portfolio volatility and (b) maximize the overall quality factor relative to the Parent Index. The optimization also includes sector, industry group and single-security weight constraints so that these characteristics of the Underlying Index vary within acceptable bands relative to the Parent Index. As of December 31, 2019, the Underlying Index was comprised of 136 constituent securities with market capitalizations ranging from $2.9 billion to $1.3 trillion. The Underlying Index is governed by published, objective rules for security selection, exclusion, weighting, rebalancing and adjustments for corporate actions. It is reconstituted quarterly. The composition of the Underlying Index will change over time. The inception date of the Underlying Index is December 31, 2013. NTI uses a “passive” or indexing approach to try to achieve the Fund’s investment objective. Unlike many investment companies, the Fund does not try to “beat” the index it tracks and does not seek temporary defensive positions when markets decline or appear overvalued. In addition to tracking the performance of the Underlying Index, the Investment Adviser seeks to minimize portfolio turnover and tax inefficiencies. NTI uses a representative sampling strategy to manage the Fund. “Representative sampling” is investing in a representative sample of securities that collectively has an investment profile similar to the Underlying Index. The Fund may or may not hold all of the securities that are included in the Underlying Index. The Fund reserves the right to invest in substantially all of the securities in its Underlying Index in approximately the same proportions (i.e., replication) if NTI determines that it is in the best interest of the Fund. Under normal circumstances, the Fund will invest at least 80% of its total assets (exclusive of collateral held from securities lending) in the securities of the Underlying Index. The Fund may also invest up to 20% of its assets in cash and cash equivalents, including shares of money market funds advised by NTI or its affiliates, futures contracts and options on futures contracts, as well as securities not included in the Underlying Index, but which NTI believes will help the Fund track its Underlying Index. The Underlying Index is created and sponsored by NTI, as the Index Provider. NTI also serves as the investment adviser to the Fund. The Index Provider determines the composition and relative weightings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index. The Fund may lend securities representing up to one-third of the value of the Fund’s total assets (including the value of the collateral received). The Fund is “non-diversified” under the Investment Company Act of 1940 (“1940 Act”), as amended, and may invest more of its assets in fewer issuers than “diversified” funds. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated.