Graftech International's three largest insider shareholders as of September 09, 2026 are House Capital Ltd Colonial (TenPercentOwner, 3.14Mn shares), Gp Ltd Bcp (Other, 2.34Mn shares), Jeremy S. Halford (Evp, Chief Operating Officer, 211.39K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | House Capital Ltd Colonial | TenPercentOwner | 3,135,806 | 0 | 3,135,806 | 50.7% | 20 May, 2024 |
| 2 | Gp Ltd Bcp | Other | 0 | 2,335,283 | 2,335,283 | 37.8% | 04 Jan, 2024 |
| 3 | Jeremy S. Halford | Evp, Chief Operating Officer | 211,391 | 0 | 211,391 | 3.4% | 14 Mar, 2025 |
| 4 | David J. Rintoul | President And Ceo | 115,655 | 0 | 115,655 | 1.9% | 09 Nov, 2021 |
| 5 | Jean-Marc Germain | Director | 90,000 | 0 | 90,000 | 1.5% | 12 May, 2025 |
| 6 | Gina K Gunning | Clo Corporate Secretary | 66,787 | 0 | 66,787 | 1.1% | 27 Feb, 2024 |
| 7 | Marcel Kessler | Ceo And President | 52,078 | 0 | 52,078 | 0.8% | 12 Nov, 2024 |
| 8 | Ortiz Inigo Perez | Svp, Commercial And Cts | 46,226 | 0 | 46,226 | 0.7% | 16 Mar, 2026 |
| 9 | Timothy K Flanagan | Ceo And President | 44,963 | 0 | 44,963 | 0.7% | 16 Mar, 2026 |
| 10 | Catherine Hedoux-Delgado | Interim Cfo And Treasurer | 29,546 | 0 | 29,546 | 0.5% | 27 Feb, 2024 |
| 11 | Rory F. O'Donnell | Chief Financial Officer Svp | 25,546 | 0 | 25,546 | 0.4% | 04 Sep, 2026 |
| 12 | Andrew James Renacci | Clo And Corp. Secy. | 8,891 | 0 | 8,891 | 0.1% | 16 Mar, 2026 |
| 13 | Jeremy Joseph Clemens | Vp, Operations | 8,361 | 0 | 8,361 | 0.1% | 16 Mar, 2026 |
| 14 | Diego Donoso | Director | 5,650 | 0 | 5,650 | 0.1% | 12 Nov, 2024 |
| 15 | Sachin M Shivaram | Director | 5,000 | 0 | 5,000 | 0.1% | 15 May, 2025 |
| 16 | Henry R. Keizer | Director | 2,797 | 0 | 2,797 | 0.0% | 13 Nov, 2023 |
| 17 | Eric V Roegner | Director | 0 | 33 | 33 | 0.0% | 17 Mar, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 03 Sep, 2026 | Rory F. O'Donnell | Chief Financial Officer Svp | Acquired M | 6,171 | — | — | 27,373 | Direct |
| 03 Sep, 2026 | Rory F. O'Donnell | Chief Financial Officer Svp | Disposed F | 1,827 | $6.30 | $11.51K | 25,546 | Direct |
| 03 Sep, 2026 | Rory F. O'Donnell | Chief Financial Officer Svp | Disposed M | 6,171 | $0.00 | $0 | 6,171 | Direct |
| 30 Jun, 2026 | Eric V Roegner | Director | Acquired A | 4,865 | $0.00 | $0 | 17,083 | Direct |
| 30 Jun, 2026 | Jean-Marc Germain | Director | Acquired A | 5,076 | $0.00 | $0 | 26,537 | Direct |
| 30 Jun, 2026 | Sachin M Shivaram | Director | Acquired A | 4,865 | $0.00 | $0 | 19,140 | Direct |
| 07 May, 2026 | Henry R. Keizer | Director | Acquired A | 11,173 | $0.00 | $0 | 30,849 | Direct |
| 07 May, 2026 | Eric V Roegner | Director | Acquired A | 11,173 | $0.00 | $0 | 22,701 | Direct |
| 07 May, 2026 | Debra Fine | Director | Acquired A | 11,173 | $0.00 | $0 | 33,247 | Direct |
| 07 May, 2026 | Jean-Marc Germain | Director | Acquired A | 11,173 | $0.00 | $0 | 33,247 | Direct |
| 31 Mar, 2026 | Jean-Marc Germain | Director | Acquired A | 4,425 | $0.00 | $0 | 21,461 | Direct |
| 31 Mar, 2026 | Jean-Marc Germain | Director | Acquired A | 4,425 | $0.00 | $0 | 21,461 | Direct |
| 31 Mar, 2026 | Jean-Marc Germain | Director | Acquired A | 4,425 | $0.00 | $0 | 21,461 | Direct |
| 31 Mar, 2026 | Jean-Marc Germain | Director | Acquired A | 4,425 | $0.00 | $0 | 21,461 | Direct |
| 31 Mar, 2026 | Eric V Roegner | Director | Acquired A | 4,240 | $0.00 | $0 | 12,219 | Direct |
| 12 Mar, 2026 | Andrew James Renacci | Clo And Corp. Secy. | Acquired M | 1,800 | — | — | 9,417 | Direct |
| 12 Mar, 2026 | Ortiz Inigo Perez | Svp, Commercial And Cts | Acquired M | 10,144 | — | — | 46,226 | Direct |
| 12 Mar, 2026 | Ortiz Inigo Perez | Svp, Commercial And Cts | Acquired M | 10,144 | — | — | 46,226 | Direct |
| 12 Mar, 2026 | Jeremy Joseph Clemens | Vp, Operations | Acquired M | 2,987 | — | — | 9,420 | Direct |
| 12 Mar, 2026 | Andrew James Renacci | Clo And Corp. Secy. | Acquired M | 1,800 | — | — | 9,417 | Direct |