3 institutions reported holding $3.5M of LIMBACH HLDGS INC (LMBHW) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($2.7M), SIMPLEX TRADING, LLC ($592,900), GROUP ONE TRADING LLC ($154,000). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $2.7M | 35,500 | Added |
| 2 | SIMPLEX TRADING, LLC | $592,900 | 7,700 | Added |
| 3 | GROUP ONE TRADING LLC | $154,000 | 2,000 | Added |
Source: SEC Form 13F filings · as of 2026-06-30