3 institutions reported holding $77,760 of TGS NOPEC GEOPHYS ADR (TGSGY) in SEC 13F filings for 2026-03-31. Largest institutional holders: RHUMBLINE ADVISERS ($38,938), GAMMA Investing LLC ($25,426), Hurley Capital, LLC ($13,396). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | RHUMBLINE ADVISERS | $38,938 | 2,907 | Trimmed |
| 2 | GAMMA Investing LLC | $25,426 | 1,898 | Added |
| 3 | Hurley Capital, LLC | $13,396 | 1,000 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31