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On March 5, 2019, the Registrant's compensation committee certified the performance shares payout multiplier based on the level of achievement by the Registrant of certain pre-established performance goals for 2016 through 2018."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 954 shares acquired pursuant to grants of restricted stock units."}],"balance_after":1221,"source":{"system":"sec-edgar","filing":"0001628280-19-002657","document":"wf-form4_155199868538921.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/811596/000162828019002657/wf-form4_155199868538921.xml","form_type":"4"}},{"id":3607142,"issuer":{"id":4302,"kind":"organization","name":"KAISER ALUMINUM CORP","symbol":"KALU"},"owners":[{"id":115887,"kind":"person","name":"Huey Jennifer","position":1,"cik":"0001769865","reported_name":"Huey Jennifer","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP & Chief Accounting Officer"}}],"security":"Common Stock, par value $0.01 per share","published_at":"2019-03-07T22:45:05.000Z","date":"2019-03-05","kind":"grant","acquired":true,"shares":534,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Grant to the reporting person effective as of March 5, 2019 of restricted stock units under the Kaiser Aluminum Corporation 2016 Equity and Incentive Compensation Plan. 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