10 institutions reported holding $74.7M of THOMSON REUTERS (TMSOF) in SEC 13F filings for 2026-03-31. Largest institutional holders: MARSHALL WACE, LLP ($58.4M), IMC-Chicago, LLC ($4.4M), TUDOR INVESTMENT CORP ET AL ($2.6M), SIMPLEX TRADING, LLC ($2.0M), GROUP ONE TRADING LLC ($1.9M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | MARSHALL WACE, LLP | $58.4M | 649,216 | New |
| 2 | IMC-Chicago, LLC | $4.4M | 49,000 | New |
| 3 | TUDOR INVESTMENT CORP ET AL | $2.6M | 28,600 | New |
| 4 | SIMPLEX TRADING, LLC | $2.0M | 21,700 | Added |
| 5 | GROUP ONE TRADING LLC | $1.9M | 21,500 | Added |
| 6 | Police & Firemen's Retirement System of New Jersey | $1.9M | 21,191 | Hold |
| 7 | NATIONAL BANK OF CANADA /FI/ | $1.5M | 169 | Trimmed |
| 8 | Gulf International Bank (UK) Ltd | $1.1M | 12,039 | New |
| 9 | PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | $861,649 | 9,577 | New |
| 10 | OnyxPoint Global Management LP | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31