4 institutions reported holding $80,672 of TGS NOPEC GEOPHYS ADR (TGSGY) in SEC 13F filings for 2026-06-30. Largest institutional holders: RHUMBLINE ADVISERS ($38,267), GAMMA Investing LLC ($36,716), Ancora Advisors LLC ($5,689), Hurley Capital, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | RHUMBLINE ADVISERS | $38,267 | 2,953 | Added |
| 2 | GAMMA Investing LLC | $36,716 | 2,833 | Added |
| 3 | Ancora Advisors LLC | $5,689 | 439 | New |
| 4 | Hurley Capital, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30