| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/03/2023 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 4.7k | $79.75 | $377k | By Family Trust | 08/03/2023 |
| 03/05/2023 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 1.9k | $0.00 | $0 | | 03/05/2023 |
| 03/05/2023 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 10k | $0.00 | $0 | | 03/05/2023 |
| 03/05/2023 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 644 | $84.33 | $54.3k | | 03/05/2023 |
| 03/05/2022 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 1.6k | $0.00 | $0 | | 03/05/2022 |
| 03/05/2022 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 580 | $0.00 | $0 | | 03/05/2022 |
| 03/05/2022 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 238 | $95.13 | $22.6k | | 03/05/2022 |
| 03/05/2022 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 554 | $95.13 | $52.7k | | 03/05/2022 |
| 05/18/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 1.3k | $130.48 | $175.2k | By Family Trust | 05/18/2021 |
| 03/11/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 1.5k | $124.72 | $187.1k | By Family Trust | 03/11/2021 |
| 03/05/2021 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 1.6k | $0.00 | $0 | | 03/05/2021 |
| 03/05/2021 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 709 | $0.00 | $0 | | 03/05/2021 |
| 03/05/2021 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 248 | $114.61 | $28.4k | | 03/05/2021 |
| 03/05/2021 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 566 | $114.61 | $64.9k | | 03/05/2021 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 2.6k | $0.00 | $0 | | 03/05/2020 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 1.7k | $0.00 | $0 | | 03/05/2020 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 665 | $93.22 | $62k | | 03/05/2020 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 934 | $93.22 | $87.1k | | 03/05/2020 |
| 11/04/2019 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 2.6k | $109.42 | $283.8k | By Family Trust | 11/04/2019 |
| 10/29/2019 | KAISER ALUMINUM CORP | KALU | Gift | Common Stock, par value $0.01 per share | 1.4k | $0.00 | $0 | By Family Trust | 10/28/2019 |
| 10/28/2019 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 1.4k | $108.61 | $152.1k | By Family Trust | 10/28/2019 |
| 03/05/2019 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 1.6k | $0.00 | $0 | | 03/05/2019 |
| 03/05/2019 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 2.4k | $0.00 | $0 | | 03/05/2019 |
| 03/05/2019 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 869 | $108.79 | $94.5k | | 03/05/2019 |
| 03/05/2019 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 690 | $108.79 | $75.1k | | 03/05/2019 |
| 05/14/2018 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 3.3k | $105.03 | $342.6k | By Family Trust | 05/14/2018 |
| 03/05/2018 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 704 | $101.66 | $71.6k | | 03/05/2018 |
| 03/05/2018 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 1.5k | $101.66 | $148.8k | | 03/05/2018 |
| 03/05/2018 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 4.1k | $0.00 | $0 | | 03/05/2018 |
| 03/05/2018 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 1.5k | $0.00 | $0 | | 03/05/2018 |
| 05/11/2017 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 2k | $80.75 | $161.5k | By Family Trust | 05/11/2017 |
| 03/05/2013 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 922 | $61.12 | $56.4k | | 03/05/2013 |
| 03/05/2013 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 443 | $61.12 | $27.1k | | 03/05/2013 |
| 03/05/2013 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 1k | $0.00 | $0 | | 03/05/2013 |
| 03/05/2013 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 2.3k | $0.00 | $0 | | 03/05/2013 |