Geospace Technologies Corporation (GEOS) ownership: Top institutional holder: BlackRock Fund Advisors ($21.84M). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock Fund Advisors | 1072690.00 | $21.84M | 2016-12-31 |
| DISCIPLINED GROWTH INVESTORS INC /MN | 1101426.00 | $13.44M | 2026-03-31 |
| Tieton Capital Management, LLC | 912118.00 | $11.13M | 2026-03-31 |
| VANGUARD GROUP INC | 648222.00 | $10.96M | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 577032.00 | $7.04M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 491016.00 | $5.99M | 2026-03-31 |
| GRACE & WHITE INC /NY | 473201.00 | $5.77M | 2026-03-31 |
| SEI INVESTMENTS CO | 410906.00 | $5.01M | 2026-03-31 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.