ATNFW — Forum Markets Inc Institutional Holders · Q2 2026
Who owns Forum Markets Inc (ATNFW)? 3 institutions reported holding $9.90M in SEC 13F filings for Q2 2026 (period ended 2026-06-30). Largest holders: Group One Trading LLC ($6.4M), Simplex Trading, LLC ($3.2M), IMC-Chicago, LLC ($319,827).
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $6.4M | 1.2M | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $3.2M | 584,000 | Added |
| 3 | IMC-Chicago, LLC | $319,827 | 58,900 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30