4 institutions reported holding $152,483 of GRAFTECH INTL LTD SR NT (GTI) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($141,249), GROUP ONE TRADING LLC ($9,456), SIMPLEX TRADING, LLC ($1,773), HUNTINGTON NATIONAL BANK ($5). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $141,249 | 23,900 | Added |
| 2 | GROUP ONE TRADING LLC | $9,456 | 1,600 | Added |
| 3 | SIMPLEX TRADING, LLC | $1,773 | 300 | Trimmed |
| 4 | HUNTINGTON NATIONAL BANK | $5 | 1 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30