6 institutions reported holding $25.3M of MIRION TECHNOLOGIES INC (MIR.WS) in SEC 13F filings for 2026-03-31. Largest institutional holders: Troluce Capital Advisors LLC ($9.3M), SG Americas Securities, LLC ($6.8M), HRT FINANCIAL LP ($3.7M), SIMPLEX TRADING, LLC ($2.4M), IMC-Chicago, LLC ($1.6M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Troluce Capital Advisors LLC | $9.3M | 500,000 | New |
| 2 | SG Americas Securities, LLC | $6.8M | 984,000 | Hold |
| 3 | HRT FINANCIAL LP | $3.7M | 200,000 | New |
| 4 | SIMPLEX TRADING, LLC | $2.4M | 127,400 | Trimmed |
| 5 | IMC-Chicago, LLC | $1.6M | 85,500 | Added |
| 6 | GROUP ONE TRADING LLC | $1.5M | 82,300 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31