GEOSPACE TECHNOLOGIES CORP - GEOS
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tieton Capital Management, LLC | History | Reduced | 907,265 | 6,142 | 1.77% | 3.73% | 1 | -4,853 | -0.53% | Q2 2026 | Aug 10, 2026 |
| GRACE & WHITE INC /NY | History | Added to | 673,236 | 4,557 | 0.72% | 1.02% | 2 | +200,035 | 42.27% | Q2 2026 | Jul 17, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | Reduced | 515,067 | 3,487 | 0.0% | 0.0% | 3 | -61,965 | -10.74% | Q2 2026 | Aug 13, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 392,423 | 2,656 | 0.0% | 0.0% | 4 | -98,593 | -20.08% | Q2 2026 | Aug 11, 2026 |
| MARSHALL WACE, LLP | History | Added to | 301,916 | 2,043 | 0.0% | 0.0% | 5 | +113,110 | 59.91% | Q2 2026 | Aug 13, 2026 |
| BlackRock, Inc. | History | Added to | 231,765 | 1,569 | 0.0% | 0.0% | 6 | +6,197 | 2.75% | Q2 2026 | Aug 07, 2026 |
| US BANCORP \DE\ | History | Added to | 212,766 | 1,440 | 0.0% | 0.0% | 7 | +85,632 | 67.36% | Q2 2026 | Aug 12, 2026 |
| SEI INVESTMENTS CO | History | Reduced | 199,365 | 1,349 | 0.0% | 0.0% | 8 | -211,541 | -51.48% | Q2 2026 | Aug 14, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 164,180 | 1,112 | 0.0% | 0.0% | 9 | +12,026 | 7.9% | Q2 2026 | Aug 12, 2026 |
| STATE STREET CORP | History | Added to | 163,075 | 1,104 | 0.0% | 0.0% | 10 | +26,222 | 19.16% | Q2 2026 | Sep 22, 2026 |
| De Lisle Partners LLP | History | No change | 147,133 | 998 | 0.11% | 0.21% | 11 | 0 | 0.0% | Q2 2026 | Aug 12, 2026 |
| ROBOTTI ROBERT | History | New | 128,436 | 869 | 0.14% | — | 12 | +128,436 | New | Q2 2026 | Aug 07, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 104,918 | 710 | 0.0% | 0.0% | 13 | +57,400 | 120.8% | Q2 2026 | Sep 02, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Reduced | 87,229 | 590 | 0.0% | 0.0% | 14 | -104,766 | -54.57% | Q2 2026 | Aug 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Added to | 82,184 | 556 | 0.0% | 0.0% | 15 | +8,277 | 11.2% | Q2 2026 | Aug 14, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | Added to | 79,693 | 539 | 0.01% | 0.02% | 16 | +900 | 1.14% | Q2 2026 | Aug 14, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | Added to | 76,586 | 518 | 0.0% | 0.0% | 17 | +521 | 0.68% | Q2 2026 | Aug 13, 2026 |
| Glenorchy Capital Ltd | History | Reduced | 68,488 | 463 | 0.02% | 0.12% | 18 | -104,851 | -60.49% | Q2 2026 | Jul 29, 2026 |
| JANE STREET GROUP, LLC | History | New | 66,771 | 452 | 0.0% | — | 19 | +66,771 | New | Q2 2026 | Aug 14, 2026 |
| EagleClaw Capital Managment, LLC | History | Reduced | 50,015 | 338 | 0.05% | 0.14% | 20 | -32,000 | -39.02% | Q2 2026 | Aug 10, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | New | 44,299 | 299 | 0.0% | — | 21 | +44,299 | New | Q2 2026 | Aug 13, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | New | 42,713 | 286 | 0.0% | — | 22 | +42,713 | New | Q2 2026 | Aug 13, 2026 |
| IRONWOOD INVESTMENT MANAGEMENT LLC | History | Added to | 36,279 | 245 | 0.08% | 0.18% | 23 | +237 | 0.66% | Q2 2026 | Aug 14, 2026 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | History | New | 35,573 | 240 | 0.0% | — | 24 | +35,573 | New | Q2 2026 | Aug 14, 2026 |
| Kingsview Wealth Management, LLC | History | Added to | 31,283 | 211 | 0.0% | 0.0% | 25 | +2,961 | 10.45% | Q2 2026 | Aug 18, 2026 |
| HRT FINANCIAL LP | History | New | 30,656 | 207 | 0.0% | — | 26 | +30,656 | New | Q2 2026 | Aug 14, 2026 |
| Cambridge Investment Research Advisors, Inc. | History | Reduced | 29,865 | 202 | 0.0% | 0.0% | 27 | -14,432 | -32.58% | Q2 2026 | Jul 27, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 28,717 | 194 | 0.0% | 0.0% | 28 | -11,879 | -29.26% | Q2 2026 | Aug 13, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | Reduced | 28,201 | 190 | 0.0% | 0.0% | 29 | -1,118 | -3.81% | Q2 2026 | Aug 12, 2026 |
| GOLDMAN SACHS GROUP INC | History | New | 25,800 | 174 | 0.0% | — | 30 | +25,800 | New | Q2 2026 | Aug 14, 2026 |
| Mraz, Amerine & Associates, Inc. | History | Added to | 24,385 | 165 | 0.02% | 0.04% | 31 | +304 | 1.26% | Q2 2026 | Jul 16, 2026 |
| ELEVATION POINT WEALTH PARTNERS, LLC | History | Reduced | 24,313 | 164 | 0.0% | 0.01% | 33 | -42 | -0.17% | Q2 2026 | Aug 12, 2026 |
| Vestmark Advisory Solutions, Inc. | History | No change | 24,313 | 164 | 0.0% | 0.0% | 32 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| IMC-Chicago, LLC | History | Added to | 23,132 | 156 | 0.0% | 0.0% | 34 | +9,634 | 71.37% | Q2 2026 | Aug 06, 2026 |
| COMMONWEALTH EQUITY SERVICES, LLC | History | Added to | 22,496 | 152 | 0.0% | 0.0% | 35 | +611 | 2.79% | Q2 2026 | Jul 29, 2026 |
| Empowered Funds, LLC | History | No change | 20,291 | 137 | 0.0% | 0.0% | 36 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Tannin Capital LLC | History | Added to | 19,657 | 133 | 0.09% | 0.15% | 37 | +2,448 | 14.23% | Q2 2026 | Aug 04, 2026 |
| Moors & Cabot, Inc. | History | Reduced | 19,500 | 132 | 0.01% | 0.1% | 38 | -171,100 | -89.77% | Q2 2026 | Aug 10, 2026 |
| AXQ CAPITAL, LP | History | New | 19,637 | 132 | 0.01% | — | 39 | +19,637 | New | Q2 2026 | Aug 06, 2026 |
| GSA CAPITAL PARTNERS LLP | History | New | 15,498 | 105 | 0.01% | — | 40 | +15,498 | New | Q2 2026 | Aug 06, 2026 |
| MORGAN STANLEY | History | Reduced | 15,255 | 103 | 0.0% | 0.0% | 41 | -1,263 | -7.65% | Q2 2026 | Aug 13, 2026 |
| XTX Topco Ltd | History | New | 13,435 | 90 | 0.0% | — | 42 | +13,435 | New | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | History | New | 12,680 | 85 | 0.0% | — | 43 | +12,680 | New | Q2 2026 | Aug 14, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 12,448 | 84 | 0.0% | 0.0% | 44 | +2,270 | 22.3% | Q2 2026 | Aug 14, 2026 |
| HUB Investment Partners, LLC | History | No change | 10,000 | 67 | 0.0% | 0.0% | 45 | 0 | 0.0% | Q2 2026 | Jul 31, 2026 |
| UBS Group AG | History | Added to | 7,336 | 49 | 0.0% | 0.0% | 46 | +5,935 | 423.63% | Q2 2026 | Aug 13, 2026 |
| Vanguard Global Advisers, LLC | History | No change | 5,026 | 34 | 0.0% | 0.0% | 47 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| Arax Advisory Partners | History | New | 4,660 | 31 | 0.0% | — | 48 | +4,660 | New | Q2 2026 | Aug 10, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | Added to | 4,000 | 27 | 0.0% | 0.0% | 49 | +2,000 | 100.0% | Q2 2026 | Aug 07, 2026 |
| SIMPLEX TRADING, LLC | History | Added to | 2,075 | 14 | 0.0% | 0.0% | 50 | +1,679 | 423.99% | Q2 2026 | Aug 12, 2026 |
| JPMORGAN CHASE & CO | History | New | 1,621 | 10 | 0.0% | — | 52 | +1,621 | New | Q2 2026 | Aug 12, 2026 |
| SBI Securities Co., Ltd. | History | Reduced | 1,611 | 10 | 0.0% | 0.0% | 51 | -195 | -10.8% | Q2 2026 | Jul 22, 2026 |
| OSAIC HOLDINGS, INC. | History | Reduced | 1,377 | 9 | 0.0% | 0.0% | 53 | -266 | -16.19% | Q2 2026 | Aug 14, 2026 |
| FMR LLC | History | Added to | 1,194 | 8 | 0.0% | 0.0% | 54 | +85 | 7.66% | Q2 2026 | Aug 13, 2026 |
| GROUP ONE TRADING LLC | History | Reduced | 1,075 | 7 | 0.0% | 0.0% | 55 | -1,500 | -58.25% | Q2 2026 | Aug 13, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | No change | 1,060 | 6 | 0.0% | 0.0% | 56 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| MCGUIRE CAPITAL ADVISORS INC | History | New | 750 | 5 | 0.0% | — | 60 | +750 | New | Q2 2026 | Aug 14, 2026 |
| MCF Advisors LLC | History | New | 740 | 5 | 0.0% | — | 59 | +740 | New | Q2 2026 | Aug 12, 2026 |
| Larson Financial Group LLC | History | No change | 858 | 5 | 0.0% | 0.0% | 57 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Parvin Asset Management, LLC | History | No change | 750 | 5 | 0.0% | 0.01% | 58 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| CoreCap Advisors, LLC | History | Reduced | 500 | 3 | 0.0% | 0.0% | 63 | -450 | -47.37% | Q2 2026 | Jul 06, 2026 |
| HARBOUR INVESTMENTS, INC. | History | Added to | 515 | 3 | 0.0% | 0.0% | 61 | +10 | 1.98% | Q2 2026 | Aug 12, 2026 |
| Sunbelt Securities, Inc. | History | No change | 300 | 3 | 0.0% | 0.0% | 62 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| ROYAL BANK OF CANADA | History | Reduced | 357 | 2 | 0.0% | 0.0% | 64 | -109 | -23.39% | Q2 2026 | Aug 14, 2026 |
| Aventura Private Wealth, LLC | History | Reduced | 300 | 2 | 0.0% | 0.0% | 67 | -85 | -22.08% | Q2 2026 | Jul 15, 2026 |
| CWM, LLC | History | No change | 190 | 2 | 0.0% | 0.0% | 65 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | History | No change | 400 | 2 | 0.0% | 0.0% | 66 | 0 | 0.0% | Q2 2026 | Jul 22, 2026 |
| Nemes Rush Group LLC | History | New | 280 | 1 | 0.0% | — | 73 | +280 | New | Q2 2026 | Aug 14, 2026 |
| Kingdom Financial Group LLC. | History | Reduced | 176 | 1 | 0.0% | 0.0% | 71 | -18 | -9.28% | Q2 2026 | Aug 07, 2026 |
| Farther Finance Advisors, LLC | History | Reduced | 184 | 1 | 0.0% | 0.0% | 72 | -8 | -4.17% | Q2 2026 | Jul 17, 2026 |
| Capital Advisors, Ltd. LLC | History | No change | 122 | 1 | 0.0% | 0.0% | 68 | 0 | 0.0% | Q2 2026 | Jul 16, 2026 |
| Hurley Capital, LLC | History | No change | 206 | 1 | 0.0% | 0.0% | 69 | 0 | 0.0% | Q2 2026 | Aug 10, 2026 |
| IFP Advisors, Inc | History | No change | 232 | 1 | 0.0% | 0.0% | 70 | 0 | 0.0% | Q2 2026 | Jul 20, 2026 |
| DISCIPLINED GROWTH INVESTORS INC /MN | History | Closed out | 0 | 0 | — | 0.27% | — | -1,101,426 | -100.0% | Q2 2026 | Aug 14, 2026 |
| First Eagle Investment Management, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -240,000 | -100.0% | Q2 2026 | Aug 05, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -107,386 | -100.0% | Q2 2026 | Aug 14, 2026 |
| 683 Capital Management, LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -39,252 | -100.0% | Q2 2026 | Aug 14, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Reduced | 76 | 0 | — | 0.0% | — | -23,366 | -99.68% | Q2 2026 | Aug 13, 2026 |
| Hudson Bay Capital Management LP | History | Closed out | 0 | 0 | — | 0.0% | — | -22,293 | -100.0% | Q2 2026 | Aug 14, 2026 |
| Qube Research & Technologies Ltd | History | Closed out | 0 | 0 | — | 0.0% | — | -21,909 | -100.0% | Q2 2026 | Aug 14, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Closed out | 0 | 0 | — | 0.0% | — | -18,060 | -100.0% | Q2 2026 | Aug 14, 2026 |
| Schonfeld Strategic Advisors LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -16,282 | -100.0% | Q2 2026 | Aug 14, 2026 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | History | Closed out | 0 | 0 | — | 0.03% | — | -13,636 | -100.0% | Q2 2026 | Aug 06, 2026 |
| BARCLAYS PLC | History | Closed out | 0 | 0 | — | 0.0% | — | -11,866 | -100.0% | Q2 2026 | Aug 14, 2026 |
| OMERS ADMINISTRATION Corp | History | Closed out | 0 | 0 | — | 0.0% | — | -11,100 | -100.0% | Q2 2026 | Aug 13, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Closed out | 0 | 0 | — | 0.0% | — | -10,335 | -100.0% | Q2 2026 | Aug 14, 2026 |
| TrinityBridge Ltd | History | Closed out | 0 | 0 | — | 0.0% | — | -1,600 | -100.0% | Q2 2026 | Aug 11, 2026 |
| Steward Partners Investment Advisory, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -1,200 | -100.0% | Q2 2026 | Aug 13, 2026 |
| CITIGROUP INC | History | Closed out | 0 | 0 | — | 0.0% | — | -1,126 | -100.0% | Q2 2026 | Aug 03, 2026 |
| Truvestments Capital LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -745 | -100.0% | Q2 2026 | Aug 12, 2026 |
| Covestor Ltd | History | Closed out | 0 | 0 | — | 0.01% | — | -728 | -100.0% | Q2 2026 | Aug 07, 2026 |
| RHUMBLINE ADVISERS | History | Closed out | 0 | 0 | — | 0.0% | — | -439 | -100.0% | Q2 2026 | Aug 11, 2026 |
| Advisory Services Network, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -200 | -100.0% | Q2 2026 | Aug 12, 2026 |
| Lloyd Advisory Services, LLC. | History | Closed out | 0 | 0 | — | 0.0% | — | -194 | -100.0% | Q2 2026 | Aug 07, 2026 |
| Strategic Wealth Partners, Ltd. | History | New | 100 | 0 | — | — | — | +100 | New | Q2 2026 | Aug 12, 2026 |
| Root Financial Partners, LLC | History | Closed out | 0 | 0 | — | — | — | -34 | -100.0% | Q2 2026 | Jul 29, 2026 |
| Transamerica Financial Advisors, LLC | History | New | 27 | 0 | — | — | — | +27 | New | Q2 2026 | Aug 14, 2026 |
| Caitong International Asset Management Co., Ltd | History | Added to | 31 | 0 | — | — | — | +25 | 416.67% | Q2 2026 | Aug 04, 2026 |
| Buck Wealth Strategies, LLC | History | New | 20 | 0 | — | — | — | +20 | New | Q2 2026 | Jul 30, 2026 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | History | No change | 25 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| TOTH FINANCIAL ADVISORY CORP | History | No change | 100 | 0 | — | 0.0% | — | 0 | 0.0% | Q2 2026 | Jul 14, 2026 |
| SIGNATUREFD, LLC | History | No change | 54 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Jul 23, 2026 |
| Allworth Financial LP | History | No change | 15 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 11, 2026 |
| Triumph Capital Management | History | No change | 100 | 0 | — | 0.0% | — | 0 | 0.0% | Q2 2026 | Jul 20, 2026 |
| Optiver Holding B.V. | History | No change | 6 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 12, 2026 |