2 institutions reported holding $16,502 of MUELLER WATER PRODUCTS INC (MWA.B) in SEC 13F filings for 2026-03-31. Largest institutional holders: GROUP ONE TRADING LLC ($16,494), HUNTINGTON NATIONAL BANK ($8). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $16,494 | 600 | Trimmed |
| 2 | HUNTINGTON NATIONAL BANK | $8 | 1 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31