1 institutions reported holding $41,640 of MIDDLESEX WTR CO (MSEXP) in SEC 13F filings for 2026-03-31. Largest institutional holders: SIMPLEX TRADING, LLC ($41,640). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $41,640 | 800 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31