12 institutions reported holding $348,789 of ARGO BLOCKCHAIN PLC (ARBKL) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($147,231), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($136,704), IMC-Chicago, LLC ($29,848), Westside Investment Management, Inc. ($23,965), MORGAN STANLEY ($7,715). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $147,231 | 51,300 | Trimmed |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $136,704 | 47,632 | Trimmed |
| 3 | IMC-Chicago, LLC | $29,848 | 10,400 | New |
| 4 | Westside Investment Management, Inc. | $23,965 | 8,350 | New |
| 5 | MORGAN STANLEY | $7,715 | 2,688 | Trimmed |
| 6 | RHUMBLINE ADVISERS | $2,149 | 749 | Added |
| 7 | UBS Group AG | $1,157 | 403 | New |
| 8 | SBI Securities Co., Ltd. | $17 | 6 | Added |
| 9 | Farther Finance Advisors, LLC | $3 | 1 | Hold |
| 10 | Arax Advisory Partners | $0 | 0 | Exited |
| 11 | Signature Resources Capital Management, LLC | $0 | 0 | Exited |
| 12 | JPMORGAN CHASE & CO | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31