7 institutions reported holding $5.4M of NORTHERN TR CORP (NTRSO) in SEC 13F filings for 2026-06-30. Largest institutional holders: GROUP ONE TRADING LLC ($2.0M), IMC-Chicago, LLC ($1.8M), SIMPLEX TRADING, LLC ($1.4M), 10Elms LLP ($129,982), PNC Financial Services Group, Inc. ($13,064). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $2.0M | 11,700 | Trimmed |
| 2 | IMC-Chicago, LLC | $1.8M | 10,600 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $1.4M | 8,000 | Added |
| 4 | 10Elms LLP | $129,982 | 6,925 | Hold |
| 5 | PNC Financial Services Group, Inc. | $13,064 | 696 | Trimmed |
| 6 | Byrne Asset Management LLC | $7,508 | 400 | Hold |
| 7 | First Command Advisory Services, Inc. | $3,203 | 168 | New |
Source: SEC Form 13F filings · as of 2026-06-30