5 institutions reported holding $16.7M of THOMSON REUTERS CORP (TMSOF) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($6.1M), IMC-Chicago, LLC ($6.0M), GROUP ONE TRADING LLC ($2.5M), Police & Firemen's Retirement System of New Jersey ($1.4M), NATIONAL BANK OF CANADA /FI/ ($604,337). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $6.1M | 74,800 | Added |
| 2 | IMC-Chicago, LLC | $6.0M | 73,800 | Added |
| 3 | GROUP ONE TRADING LLC | $2.5M | 30,700 | Added |
| 4 | Police & Firemen's Retirement System of New Jersey | $1.4M | 17,561 | Trimmed |
| 5 | NATIONAL BANK OF CANADA /FI/ | $604,337 | 74 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30