3 institutions reported holding $147,576 of KLX ENERGY SERVICES HOLDINGS (KLXER) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($101,910), IMC-Chicago, LLC ($28,122), GROUP ONE TRADING LLC ($17,544). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $101,910 | 39,500 | New |
| 2 | IMC-Chicago, LLC | $28,122 | 10,900 | New |
| 3 | GROUP ONE TRADING LLC | $17,544 | 6,800 | New |
Source: SEC Form 13F filings · as of 2026-06-30