X0306 4 2016-03-05 0 0000811596 KAISER ALUMINUM CORP KALU 0001311544 DONNAN JOHN MALCOLM C/O KAISER ALUMINUM CORP. 27422 PORTOLA PARKWAY SUITE 200 FOOTHILL RANCH CA 92610 0 1 0 0 EVP - Legal, Compliance & HR Common Stock, par value $0.01 per share 2016-03-05 4 A 0 4107 0.00 A 23234 D Common Stock, par value $0.01 per share 2016-03-05 4 A 0 3564 0.00 A 26798 D Common Stock, par value $0.01 per share 2016-03-05 4 F 0 1375 80.46 D 25423 D Common Stock, par value $0.01 per share 2016-03-05 4 F 0 1739 80.46 D 23684 D Employee Stock Options (Right to Buy) 80.01 2017-04-03 Common Stock, par value $0.01 per share 2083 2083 D Grant to the reporting person effective as of March 5, 2016, of restricted stock under the Kaiser Aluminum Corporation Amended and Restated 2006 Equity and Performance Incentive Plan. All restrictions will lapse on March 5, 2019 or earlier upon the occurrence of certain specified circumstances. Shares earned upon the vesting on March 5, 2016 of certain performance shares granted to the reporting person in 2013 under the Kaiser Aluminum Corporation 2006 Equity and Performance Incentive Plan, as amended. On March 5, 2016, the Registrant's compensation committee certified the performance shares payout multiplier based on the level of achievement by the Registrant of a certain pre-established performance goal for 2013 through 2015. Shares withheld to satisfy the withholding tax obligations resulting from the vesting on March 5, 2016 of the above-referenced performance shares. Shares withheld to satisfy the withholding tax obligations resulting from the vesting on March 5, 2016 of certain shares granted to the reporting person in 2013 under the Kaiser Aluminum Corporation 2006 Equity and Performance Incentive Plan, as amended. Stock option award granted on April 3, 2007 for 2,083 shares of common stock, with one-third of such options vested on each of the first, second and third anniversaries of the grant date. /s/ Cherrie I. Tsai, with power of attorney for John M. Donnan 2016-03-08