Kaiser Aluminum Corporation

KALU·NASDAQ·$185.55Share Price as of 11/2·$3BMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/22/26 10-QQ2 ended 06/30/2607/23/26 10-QQ1 ended 03/31/2604/23/26 10-KFY 202502/19/26 10-QQ3 ended 09/30/2510/23/25

Disclosures

8-KCurrent report10/21/26 8-KCurrent report10/13/26 8-KCurrent report08/17/26 8-KCurrent report07/22/26 8-KCurrent report07/13/26

Prospectuses and Registrations

S-8Registration of securities for employees06/04/26 S-8Registration of securities for employees06/11/24 S-8Registration of securities for employees06/03/21 POS AMPost-effective amendment06/16/17 424B3Prospectus08/23/16

Proxies

DEF 14ADefinitive proxy04/28/26 DEF 14ADefinitive proxy04/28/25 DEFA14AAdditional proxy materials05/21/24 DEF 14ADefinitive proxy04/26/24 DEF 14ADefinitive proxy04/28/23

Ownership

Form 3Initial insider ownership10/02/26 SC 13GBeneficial ownership07/31/26 SC 13G/ABeneficial ownership (amended)07/14/26 Form 4Insider transaction06/05/26 Form 4Insider transaction06/05/26

Other

SDConflict Minerals disclosure05/27/26 SDConflict Minerals disclosure05/23/25 SDConflict Minerals disclosure05/24/24 SDConflict Minerals disclosure05/26/23 UPLOADLetter from the SEC12/15/22