4 institutions reported holding $6.8M of TELEPHONE & DATA SYS INC (TDSPRV) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($4.1M), HRT FINANCIAL LP ($1.1M), GROUP ONE TRADING LLC ($951,157), SIMPLEX TRADING, LLC ($680,984). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $4.1M | 110,600 | Added |
| 2 | HRT FINANCIAL LP | $1.1M | 30,000 | New |
| 3 | GROUP ONE TRADING LLC | $951,157 | 25,700 | Added |
| 4 | SIMPLEX TRADING, LLC | $680,984 | 18,400 | Added |
Source: SEC Form 13F filings · as of 2026-06-30