3 institutions reported holding $13.4M of MID-AMER APT CMNTYS INC (MAAPRI) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($10.3M), SIMPLEX TRADING, LLC ($2.3M), GROUP ONE TRADING LLC ($764,170). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $10.3M | 74,200 | Added |
| 2 | SIMPLEX TRADING, LLC | $2.3M | 16,800 | Added |
| 3 | GROUP ONE TRADING LLC | $764,170 | 5,500 | Added |
Source: SEC Form 13F filings · as of 2026-06-30