1 institutions reported holding $198,931 of GRAPHITE ONE INC COM (GPHOF) in SEC 13F filings for 2026-03-31. Largest institutional holders: Kidder Stephen W ($198,931). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Kidder Stephen W | $198,931 | 225,000 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31