3 institutions reported holding $18.0M of Tourmaline Oil Corp. (TRMLF) in SEC 13F filings for 2026-06-30. Largest institutional holders: GRACE & WHITE INC /NY ($16.6M), CONFLUENCE INVESTMENT MANAGEMENT LLC ($1.4M), Golden State Equity Partners ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GRACE & WHITE INC /NY | $16.6M | 396,668 | Trimmed |
| 2 | CONFLUENCE INVESTMENT MANAGEMENT LLC | $1.4M | 33,988 | New |
| 3 | Golden State Equity Partners | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30