Kaiser Aluminum's top three insider shareholders as of September 29, 2026 are Keith Harvey (President Ceo, 94.31K shares), Jason Walsh (Evp Manufacturing, 42.77K shares), Neal E West (Evp Cfo, 29.71K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Keith Harvey | President Ceo | 94,308 | 0 | 94,308 | 22.3% | 01 May, 2026 |
| 2 | Jason Walsh | Evp Manufacturing | 42,770 | 0 | 42,770 | 10.1% | 14 Aug, 2025 |
| 3 | John Malcolm Donnan | Evp, Cao And Gc | 28,200 | 0 | 28,200 | 6.7% | 29 Apr, 2026 |
| 4 | Blain Tiffany | Evp Sales Marketing | 26,275 | 0 | 26,275 | 6.2% | 10 Nov, 2025 |
| 5 | Alfred E Jr Osborne | Director | 24,957 | 0 | 24,957 | 5.9% | 09 Jun, 2023 |
| 6 | David A Foster | Director | 24,332 | 0 | 24,332 | 5.8% | 05 Jun, 2026 |
| 7 | Ray Parkinson | Svp Ae Innovation | 20,750 | 0 | 20,750 | 4.9% | 07 Mar, 2025 |
| 8 | Neal E West | Evp Cfo | 0 | 19,091 | 19,091 | 4.5% | 29 Apr, 2026 |
| 9 | Thomas H. Robb | Evp Manufacturing | 17,898 | 0 | 17,898 | 4.2% | 09 Mar, 2026 |
| 10 | Donald J Stebbins | Director | 15,407 | 0 | 15,407 | 3.6% | 05 Jun, 2026 |
| 11 | Michael C Arnold | Director | 11,445 | 0 | 11,445 | 2.7% | 05 Jun, 2026 |
| 12 | Kevin W Williams | Director | 8,562 | 0 | 8,562 | 2.0% | 12 Jun, 2025 |
| 13 | Lauralee Martin | Director | 8,345 | 0 | 8,345 | 2.0% | 12 Jun, 2025 |
| 14 | Jennifer Huey | Vp Chief Accounting Officer | 7,938 | 0 | 7,938 | 1.9% | 07 Mar, 2023 |
| 15 | Vijai Narayan | Vp, Corp Ctrl Cao | 7,517 | 0 | 7,517 | 1.8% | 09 Mar, 2026 |
| 16 | Brant Weaver | Vp Strategic Development | 7,337 | 0 | 7,337 | 1.7% | 02 Jun, 2023 |
| 17 | Mark Krouse | Vp Human Resources | 7,248 | 0 | 7,248 | 1.7% | 07 Mar, 2023 |
| 18 | Del L Miller | Vp Metal Strategy | 6,589 | 0 | 6,589 | 1.6% | 07 Mar, 2023 |
| 19 | Hugh J. Iii Barger | Evp Sales Marketing | 5,711 | 0 | 5,711 | 1.4% | 09 Mar, 2026 |
| 20 | Richard P. Grimley | Director | 5,364 | 0 | 5,364 | 1.3% | 05 Jun, 2026 |
| 21 | Glenda J Minor | Director | 4,516 | 0 | 4,516 | 1.1% | 05 Jun, 2026 |
| 22 | Iulian Gheorghe | Svp Adv Eng Innovation | 4,448 | 0 | 4,448 | 1.1% | 29 Apr, 2026 |
| 23 | Leo Wilfred Gerard | Director | 4,266 | 0 | 4,266 | 1.0% | 06 Jun, 2022 |
| 24 | James Donald Hoffman | Director | 3,760 | 0 | 3,760 | 0.9% | 05 Jun, 2026 |
| 25 | Teresa Mosley Sebastian | Director | 3,745 | 0 | 3,745 | 0.9% | 13 Jun, 2024 |
| 26 | Kimberly Thompson Glas | Director | 3,466 | 0 | 3,466 | 0.8% | 05 Jun, 2026 |
| 27 | Melinda C Ellsworth | Vp Ir Corp. Communications | 3,432 | 0 | 3,432 | 0.8% | 08 Mar, 2022 |
| 28 | Brett Wilcox | Director | 3,019 | 0 | 3,019 | 0.7% | 05 Jun, 2026 |
| 29 | Jack A Hockema | Ceo | 1,639 | 0 | 1,639 | 0.4% | 13 Jun, 2024 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 04 Jun, 2026 | Glenda J Minor | Director | Acquired A | 786 | $0.00 | $0 | 4,181 | Direct |
| 04 Jun, 2026 | Michael C Arnold | Director | Acquired A | 786 | $0.00 | $0 | 11,445 | Direct |
| 04 Jun, 2026 | Brett Wilcox | Director | Acquired A | 786 | $0.00 | $0 | 2,691 | Direct |
| 04 Jun, 2026 | Kimberly Thompson Glas | Director | Acquired A | 786 | $0.00 | $0 | 3,466 | Direct |
| 04 Jun, 2026 | Donald J Stebbins | Director | Acquired A | 786 | $0.00 | $0 | 14,776 | Direct |
| 04 Jun, 2026 | James Donald Hoffman | Director | Acquired A | 786 | $0.00 | $0 | 3,171 | Direct |
| 04 Jun, 2026 | Richard P. Grimley | Director | Acquired A | 786 | $0.00 | $0 | 5,364 | Direct |
| 04 Jun, 2026 | David A Foster | Director | Acquired A | 786 | $0.00 | $0 | 24,332 | Direct |
| 04 Jun, 2026 | Donald J Stebbins | Director | Acquired A | 631 | $178.10 | $112.38K | 15,407 | Direct |
| 04 Jun, 2026 | James Donald Hoffman | Director | Acquired A | 589 | $178.10 | $104.90K | 3,760 | Direct |
| 04 Jun, 2026 | Glenda J Minor | Director | Acquired A | 335 | $178.10 | $59.66K | 4,516 | Direct |
| 04 Jun, 2026 | Brett Wilcox | Director | Acquired A | 328 | $178.10 | $58.42K | 3,019 | Direct |
| 29 Apr, 2026 | Keith Harvey | President Ceo | Disposed S | 3,031 | $173.13 | $524.76K | 94,308 | Direct |
| 29 Apr, 2026 | Richard P. Grimley | Director | Disposed S | 1,524 | $171.52 | $261.40K | 4,578 | Direct |
| 28 Apr, 2026 | Neal E West | Evp Cfo | Disposed S | 5,000 | $173.29 | $866.45K | 19,091 | Indirect |
| 27 Apr, 2026 | Brett Wilcox | Director | Disposed S | 15,000 | $174.44 | $2.62Mn | 9,887 | Indirect |
| 27 Apr, 2026 | John Malcolm Donnan | Evp, Cao And Gc | Disposed S | 2,743 | $178.20 | $488.81K | 29,700 | Direct |
| 27 Apr, 2026 | Keith Harvey | President Ceo | Disposed S | 47,001 | $175.09 | $8.23Mn | 97,339 | Direct |
| 27 Apr, 2026 | Iulian Gheorghe | Svp Adv Eng Innovation | Disposed S | 175 | $174.22 | $30.49K | 4,448 | Direct |
| 28 Apr, 2026 | John Malcolm Donnan | Evp, Cao And Gc | Disposed G | 1,500 | $0.00 | $0 | 28,200 | Direct |