KAISER ALUMINUM CORP 10-K

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities Market Information Our outstanding common stock is traded under the ticker symbol “KALU” on the Nasdaq Global Select Market. Holders As of February 22, 2022, there were approximately 488 holders of record of our common stock. Stock Performance Graph The following graph compares the cumulative total shareholder return on our common stock with: (i) the S&P SmallCap 600 Index; (ii) the Russell 2000 Index; and (iii) the S&P SmallCap 600 Materials Index. We are a component of each of these indices. The graph assumes: (i) an initial investment of $100 as of December 31, 2016 and (ii) reinvestment of all dividends. The performance graph is not necessarily indicative of the future performance of our stock price. COMPARISON OF 5 YEAR CUMULATIVE TOTAL RETURN Among Kaiser Aluminum Corporation, the S&P SmallCap 600 Index, the Russell 2000 Index and the S&P SmallCap 600 Materials Index 28 Issuer Repurchases of Equity Securities The following table provides information regarding our repurchases of our common shares during the quarter ended December 31, 2021: Equity Incentive Plans Stock Repurchase Plan Total Number of Shares Purchased 1 Average Price per Share Total Number of Shares Purchased 2 Average Price per Share Maximum Dollar Value of Shares that May Yet Be Purchased Under the Program (millions) 2 October 1, 2021 - October 31, 2021 — $ — — $ — $ 93.1 November 1, 2021 - November 30, 2021 — — — — $ 93.1 December 1, 2021 - December 31, 2021 1,186 93.55 — — $ 93.1 Total 1,186 $ 93.55 — $ — n/a 1 Under our equity incentive plan, participants may elect to have us withhold common shares to satisfy minimum statutory tax withholding obligations arising from the recognition of income and the vesting of restricted stock, restricted stock units and performance shares. When we withhold these shares, we are required to remit to the appropriate taxing authorities the market price of the shares withheld by us on the date of withholding. The withholding of common shares by us could be deemed a purchase of such common shares. 2 In September 2018, our Board of Directors authorized us to repurchase an indeterminate number of shares of our common stock at an aggregate market value of up to $100.0 million. At December 31, 2021, $93.1 million remained available to repurchase our common shares pursuant to the stock repurchase program. The September 2018 authorization does not have an expiration date. Item 6. [Reserved] 29