| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 06/07/2023 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 4k | $63.08 | $250k | | 06/07/2023 |
| 06/07/2023 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 4k | $63.08 | $250k | | 06/07/2023 |
| 06/07/2023 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 1.3k | $63.08 | $80k | | 06/07/2023 |
| 03/05/2023 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 3.2k | $84.33 | $269.4k | | 03/05/2023 |
| 05/18/2022 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 400 | $105.47 | $42.2k | By Hockema Family Trust | 05/18/2022 |
| 04/21/2022 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 600 | $105.13 | $63.1k | By Hockema Family Trust | 04/21/2022 |
| 03/18/2022 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 750 | $91.71 | $68.8k | By Hockema Family Trust | 03/18/2022 |
| 03/05/2022 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 5.6k | $0.00 | $0 | | 03/05/2022 |
| 03/05/2022 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 2k | $95.13 | $189.5k | | 03/05/2022 |
| 03/05/2022 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 3.5k | $95.13 | $332.1k | | 03/05/2022 |
| 01/14/2022 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 1000 | $105.36 | $105.4k | By Hockema Family Trust | 01/14/2022 |
| 11/18/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 750 | $102.11 | $76.6k | By Hockema Family Trust | 11/18/2021 |
| 08/18/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 3k | $122.26 | $366.8k | By Hockema Family Trust | 08/18/2021 |
| 08/18/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 3k | $122.26 | $366.8k | By Hockema Family Trust | 08/18/2021 |
| 05/24/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 3k | $125.32 | $376k | By Hockema Family Trust | 05/24/2021 |
| 03/05/2021 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 6.8k | $0.00 | $0 | | 03/05/2021 |
| 03/05/2021 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 3.4k | $114.61 | $385.2k | | 03/05/2021 |
| 03/05/2021 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 2.9k | $114.61 | $331.3k | | 03/05/2021 |
| 03/02/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 5k | $122.00 | $610k | By Hockema Family Trust | 03/01/2021 |
| 03/01/2021 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 7k | $118.59 | $830.1k | By Hockema Family Trust | 03/01/2021 |
| 12/04/2020 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 5k | $95.97 | $479.9k | By Hockema Family Trust | 12/04/2020 |
| 06/05/2020 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 2.9k | $81.95 | $233.9k | By Hockema Family Trust | 06/03/2020 |
| 06/04/2020 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 246 | $80.05 | $19.7k | By Hockema Family Trust | 06/03/2020 |
| 06/03/2020 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 1.4k | $80.22 | $112.3k | By Hockema Family Trust | 06/03/2020 |
| 04/30/2020 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 3k | $73.42 | $220.3k | By Hockema Family Trust | 04/30/2020 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 9k | $0.00 | $0 | | 03/05/2020 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 24.7k | $0.00 | $0 | | 03/05/2020 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 11.1k | $93.22 | $1M | | 03/05/2020 |
| 03/05/2020 | KAISER ALUMINUM CORP | KALU | Payment of Exercise | Common Stock, par value $0.01 per share | 4.8k | $93.22 | $444.6k | | 03/05/2020 |
| 01/22/2020 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 12.5k | $101.14 | $1.3M | By Hockema Family Trust | 01/22/2020 |
| 11/20/2019 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 4k | $108.09 | $437.1k | By Hockema Family Trust | 11/19/2019 |
| 11/19/2019 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 8.5k | $109.20 | $923.4k | By Hockema Family Trust | 11/19/2019 |
| 09/19/2019 | KAISER ALUMINUM CORP | KALU | Sale | Common Stock, par value $0.01 per share | 12.5k | $99.16 | $1.2M | By Hockema Family Trust | 09/19/2019 |
| 03/05/2019 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 8.5k | $0.00 | $0 | | 03/05/2019 |
| 03/05/2019 | KAISER ALUMINUM CORP | KALU | Grant | Common Stock, par value $0.01 per share | 23.3k | $0.00 | $0 | | 03/05/2019 |
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