SCHNITZER STEEL INDUSTRIES, INC. 22 / Schnitzer Steel Industries, Inc. Form 10-K 2017 The underfunded status of our multiemployer pension plans may cause us to increase our contributions to the plans As discussed in Note 13 – Employee Benefits in the Notes to the Consolidated Financial Statements in Part II, Item 8 of this report, we contribute to the Steelworkers Western Independent Shops Pension Plan (“WISPP”), a multiemployer plan benefiting union employees of CSS. Because we have no current intention of withdrawing from the WISPP, we have not recognized a withdrawal liability in our consolidated financial statements. However, if such a liability were triggered, it could have a material adverse effect on our results of operations, financial position, liquidity and cash flows. Our contributions to the WISPP could also increase as a result of a diminished contribution base due to the insolvency or withdrawal of other employers who currently contribute to it, the inability or failure of withdrawing employers to pay their withdrawal liabilities, or other funding deficiencies, as we would need to fund the retirement obligations of these employers. In 2004, the Internal Revenue Service (“IRS”) approved a seven-year extension of the period over which the WISPPmay amortize unfunded liabilities, conditioned upon maintenance of certain minimum funding levels. In 2014, the WISPP obtained relief from the specified funding requirements from the IRS, which requires that the WISPP meet a minimum funded percentage on each valuation date and achieve a funded percentage of 100% as of October 1, 2029. Based on the actuarial valuation for the WISPP as of October 1, 2016, the funded percentage (based on the ratio of the market value of assets to the accumulated benefits liability (present value of accrued benefits) using the valuation method prescribed by the IRS) was 76.4%, which satisfies the minimum funded percentage requirements of the IRS. ITEM 1B. UNRESOLVED STAFF COMMENTS None.