As of September 29, 2026, Howmet Aerospace's top three insider holders are John C Plant (Executive Chairman Ceo, 2.47Mn shares), John C Plant (Executive Chairman Ceo, 787.73K shares), Ken Giacobbe (Evp And Cfo, 182.28K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | John C Plant | Executive Chairman Ceo | 2,471,367 | 0 | 2,471,367 | 73.6% | 18 Feb, 2026 |
| 2 | Ken Giacobbe | Evp And Cfo | 182,285 | 0 | 182,285 | 5.4% | 09 May, 2025 |
| 3 | Michael Niem Chanatry | Vice President | 168,502 | 0 | 168,502 | 5.0% | 18 Feb, 2026 |
| 4 | Neil Edward Marchuk | Evp, Cao | 65,105 | 0 | 65,105 | 1.9% | 12 May, 2026 |
| 5 | Lola Felice Lin | Evp, Clco And Secretary | 63,150 | 0 | 63,150 | 1.9% | 06 Aug, 2025 |
| 6 | James F Albaugh | Director | 59,442 | 0 | 59,442 | 1.8% | 26 May, 2026 |
| 7 | Amy E Alving | Board Member | 57,820 | 0 | 57,820 | 1.7% | 26 May, 2026 |
| 8 | Ulrich Schmidt | Director | 53,228 | 0 | 53,228 | 1.6% | 26 May, 2026 |
| 9 | David J Miller | Director | 51,564 | 0 | 51,564 | 1.5% | 29 May, 2024 |
| 10 | Joseph S Cantie | Director | 44,082 | 0 | 44,082 | 1.3% | 06 Jul, 2026 |
| 11 | Robert F Leduc | Director | 35,824 | 0 | 35,824 | 1.1% | 26 May, 2026 |
| 12 | Jody Miller | Director | 30,605 | 0 | 30,605 | 0.9% | 26 May, 2026 |
| 13 | Barbara Lou Shultz | Vice President And Controller | 23,874 | 0 | 23,874 | 0.7% | 27 Feb, 2026 |
| 14 | Nicole Weyerhaeuser Piasecki | Director | 19,877 | 0 | 19,877 | 0.6% | 31 May, 2022 |
| 15 | Sharon R Barner | Director | 16,582 | 0 | 16,582 | 0.5% | 26 May, 2026 |
| 16 | Gunner Smith | Director | 5,844 | 0 | 5,844 | 0.2% | 26 May, 2026 |
| 17 | Jonathan A Arena | Evp, Clco And Secretary | 3,544 | 0 | 3,544 | 0.1% | 17 Apr, 2026 |
| 18 | Patrick Winterlich | Evp, Cfo | 3,168 | 0 | 3,168 | 0.1% | 18 Feb, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 02 Jul, 2026 | Joseph S Cantie | Director | Acquired A | 134 | $270.41 | $36.23K | 44,082 | Direct |
| 21 May, 2026 | James F Albaugh | Director | Acquired A | 731 | $0.00 | $0 | 59,442 | Direct |
| 21 May, 2026 | Amy E Alving | Director | Acquired A | 731 | $0.00 | $0 | 57,820 | Direct |
| 21 May, 2026 | Jody Miller | Director | Acquired A | 731 | $0.00 | $0 | 30,605 | Direct |
| 21 May, 2026 | Ulrich Schmidt | Director | Acquired A | 731 | $0.00 | $0 | 53,228 | Direct |
| 21 May, 2026 | Joseph S Cantie | Director | Acquired A | 731 | $0.00 | $0 | 43,948 | Direct |
| 21 May, 2026 | Sharon R Barner | Director | Acquired A | 731 | $0.00 | $0 | 16,582 | Direct |
| 21 May, 2026 | Gunner Smith | Director | Acquired A | 731 | $0.00 | $0 | 5,844 | Direct |
| 21 May, 2026 | Robert F Leduc | Director | Acquired A | 731 | $0.00 | $0 | 35,824 | Direct |
| 11 May, 2026 | Neil Edward Marchuk | Evp, Cao | Disposed S | 41,932 | $269.50 | $11.30Mn | 65,105 | Direct |
| 15 Apr, 2026 | Jonathan A Arena | Evp, Clco And Secretary | Acquired A | 3,544 | $0.00 | $0 | 3,544 | Direct |
| 02 Apr, 2026 | Joseph S Cantie | Director | Acquired A | 155 | $232.68 | $36.07K | 43,217 | Direct |
| 26 Feb, 2026 | Barbara Lou Shultz | Vice President And Controller | Disposed S | 1,000 | $260.01 | $260.01K | 23,874 | Direct |
| 16 Feb, 2026 | Barbara Lou Shultz | Vice President And Controller | Disposed F | 2,692 | $250.21 | $673.57K | 24,428 | Direct |
| 17 Feb, 2026 | John C Plant | Executive Chairman Ceo | Acquired A | 22,333 | $0.00 | $0 | 2,471,367 | Direct |
| 17 Feb, 2026 | Patrick Winterlich | Evp, Cfo | Acquired A | 3,168 | $0.00 | $0 | 3,168 | Direct |
| 16 Feb, 2026 | Neil Edward Marchuk | Evp, Cao | Disposed F | 28,651 | $250.21 | $7.17Mn | 148,277 | Direct |
| 15 Feb, 2026 | Michael Niem Chanatry | Vice President | Disposed F | 10,741 | $250.21 | $2.69Mn | 175,388 | Direct |
| 17 Feb, 2026 | Neil Edward Marchuk | Evp, Cao | Acquired A | 3,881 | $0.00 | $0 | 152,158 | Direct |
| 16 Feb, 2026 | Michael Niem Chanatry | Vice President | Disposed F | 9,579 | $250.21 | $2.40Mn | 165,809 | Direct |