2 institutions reported holding $59 of MARATHON OIL CORP (MRO) in SEC 13F filings for 2026-06-30. Largest institutional holders: HUNTINGTON NATIONAL BANK ($59), Kentucky Retirement Systems ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | HUNTINGTON NATIONAL BANK | $59 | 2 | Hold |
| 2 | Kentucky Retirement Systems | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30