Who owns Geospace Technologies (GEOS)
Which tracked institutional funds hold GEOS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See GEOS company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on GEOS is one-sided between 2026-Q1 and 2026-Q2: 1 added or opened and 23 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
GEOS’s largest tracked holder by dollar value, DISCIPLINED GROWTH INVESTORS INC /MN, sizes it at 0.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in GEOS divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 77 tracked filers holding GEOS, 40 increased or opened the position and 46 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in GEOS between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 1
- ROBOTTI ROBERT$870K
Full exits 5
- DISCIPLINED GROWTH INVESTORS INC /MN$13M
- Tieton Capital Management, LLC$11M
- First Eagle Investment Management, LLC$3M
- MILLENNIUM MANAGEMENT LLC$1M
- Cambridge Investment Research Advisors, Inc.$540K
Largest trims
- SEI INVESTMENTS CO$4M
- VANGUARD CAPITAL MANAGEMENT LLC$4M
- DIMENSIONAL FUND ADVISORS LP$3M
- Moors & Cabot, Inc.$2M
- Glenorchy Capital Ltd$2M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$2M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| GRACE & WHITE INC /NY added | 673,236 | $5M | 6.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 515,067 | $3M | 4.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 392,423 | $3M | 3.5% | 2026-Q2 |
| MARSHALL WACE, LLP added | 301,916 | $2M | 2.7% | 2026-Q2 |
| BlackRock, Inc. added | 231,765 | $2M | 2.0% | 2026-Q2 |
| US BANCORP \DE\ added | 212,766 | $1M | 1.9% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 199,365 | $1M | 1.8% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 164,180 | $1M | 1.5% | 2026-Q2 |
| STATE STREET CORP added | 163,075 | $1M | 1.4% | 2026-Q2 |
| De Lisle Partners LLP | 147,133 | $998K | 1.3% | 2026-Q2 |
| ROBOTTI ROBERT new | 128,436 | $870K | 1.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 82,184 | $556K | 0.7% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 79,693 | $540K | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 76,586 | $518K | 0.7% | 2026-Q2 |
| Glenorchy Capital Ltd trimmed | 68,488 | $464K | 0.6% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 58,018 | $393K | 0.5% | 2026-Q2 |
| EagleClaw Capital Managment, LLC trimmed | 50,015 | $339K | 0.4% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 44,299 | $300K | 0.4% | 2026-Q2 |
| IRONWOOD INVESTMENT MANAGEMENT LLC added | 36,279 | $246K | 0.3% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC new | 35,573 | $241K | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 33,029 | $224K | 0.3% | 2026-Q2 |
| Kingsview Wealth Management, LLC added | 31,283 | $212K | 0.3% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 28,717 | $194K | 0.3% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 28,201 | $191K | 0.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 25,800 | $175K | 0.2% | 2026-Q2 |
| Mraz, Amerine & Associates, Inc. added | 24,385 | $165K | 0.2% | 2026-Q2 |
| ELEVATION POINT WEALTH PARTNERS, LLC trimmed | 24,313 | $165K | 0.2% | 2026-Q2 |
| Vestmark Advisory Solutions, Inc. | 24,313 | $165K | 0.2% | 2026-Q2 |
| IMC-Chicago, LLC added | 23,132 | $157K | 0.2% | 2026-Q2 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 22,496 | $152K | 0.2% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 21,271 | $144K | 0.2% | 2026-Q2 |
| Empowered Funds, LLC | 20,291 | $137K | 0.2% | 2026-Q2 |
| Tannin Capital LLC added | 19,657 | $133K | 0.2% | 2026-Q2 |
| AXQ CAPITAL, LP new | 19,637 | $133K | 0.2% | 2026-Q2 |
| Moors & Cabot, Inc. trimmed | 19,500 | $132K | 0.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 15,255 | $103K | 0.1% | 2026-Q2 |
| XTX Topco Ltd trimmed | 13,435 | $91K | 0.1% | 2026-Q2 |
| Invesco Ltd. new | 12,680 | $86K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 12,448 | $84K | 0.1% | 2026-Q2 |
| HUB Investment Partners, LLC | 10,000 | $68K | 0.1% | 2026-Q2 |
| UBS Group AG added | 7,336 | $50K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 5,026 | $34K | 0.0% | 2026-Q2 |
| Arax Advisory Partners new | 4,660 | $32K | 0.0% | 2026-Q2 |
| PNC Financial Services Group, Inc. added | 4,000 | $27K | 0.0% | 2026-Q2 |
| SIMPLEX TRADING, LLC added | 2,075 | $14K | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. trimmed | 1,611 | $11K | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 1,621 | $11K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. trimmed | 1,377 | $9K | 0.0% | 2026-Q2 |
| FMR LLC added | 1,194 | $8K | 0.0% | 2026-Q2 |
| Integrated Wealth Concepts LLC new | 1,150 | $8K | 0.0% | 2026-Q2 |
| GROUP ONE TRADING LLC trimmed | 1,075 | $7K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP | 1,060 | $7K | 0.0% | 2026-Q2 |
| Larson Financial Group LLC | 858 | $6K | 0.0% | 2026-Q2 |
| Parvin Asset Management, LLC | 750 | $5K | 0.0% | 2026-Q2 |
| MCGUIRE CAPITAL ADVISORS INC new | 750 | $5K | 0.0% | 2026-Q2 |
| MCF Advisors LLC new | 740 | $5K | 0.0% | 2026-Q2 |
| HARBOUR INVESTMENTS, INC. added | 515 | $3K | 0.0% | 2026-Q2 |
| CoreCap Advisors, LLC trimmed | 500 | $3K | 0.0% | 2026-Q2 |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | 400 | $3K | 0.0% | 2026-Q2 |
| Aventura Private Wealth, LLC trimmed | 300 | $2K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 357 | $2K | 0.0% | 2026-Q2 |
| Nemes Rush Group LLC new | 280 | $2K | 0.0% | 2026-Q2 |
| IFP Advisors, Inc | 232 | $2K | 0.0% | 2026-Q2 |
| Hurley Capital, LLC | 206 | $1K | 0.0% | 2026-Q2 |
| Farther Finance Advisors, LLC trimmed | 184 | $1K | 0.0% | 2026-Q2 |
| Kingdom Financial Group LLC. trimmed | 176 | $1K | 0.0% | 2026-Q2 |
| Strategic Wealth Partners, Ltd. new | 100 | $677 | 0.0% | 2026-Q2 |
| Triumph Capital Management | 100 | $677 | 0.0% | 2026-Q2 |
| TOTH FINANCIAL ADVISORY CORP | 100 | $677 | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 76 | $515 | 0.0% | 2026-Q2 |
| SIGNATUREFD, LLC | 54 | $366 | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd added | 31 | $210 | 0.0% | 2026-Q2 |
| Transamerica Financial Advisors, LLC new | 27 | $182 | 0.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 25 | $169 | 0.0% | 2026-Q2 |
| Buck Wealth Strategies, LLC new | 20 | $135 | 0.0% | 2026-Q2 |
| Allworth Financial LP | 15 | $102 | 0.0% | 2026-Q2 |
| Optiver Holding B.V. | 6 | $41 | 0.0% | 2026-Q2 |
| DISCIPLINED GROWTH INVESTORS INC /MN trimmed | 1,101,426 | $13M | 17.5% | 2026-Q1 stale (1 quarter behind) |
| Tieton Capital Management, LLC added | 912,118 | $11M | 14.5% | 2026-Q1 stale (1 quarter behind) |
| First Eagle Investment Management, LLC trimmed | 240,000 | $3M | 3.8% | 2026-Q1 stale (1 quarter behind) |
| MILLENNIUM MANAGEMENT LLC added | 107,386 | $1M | 1.7% | 2026-Q1 stale (1 quarter behind) |
| Cambridge Investment Research Advisors, Inc. trimmed | 44,297 | $540K | 0.7% | 2026-Q1 stale (1 quarter behind) |
| 683 Capital Management, LLC | 39,252 | $479K | 0.6% | 2026-Q1 stale (1 quarter behind) |
| Hudson Bay Capital Management LP added | 22,293 | $272K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| Qube Research & Technologies Ltd trimmed | 21,909 | $267K | 0.3% | 2026-Q1 stale (1 quarter behind) |
| VANGUARD GROUP INC added | 648,222 | $11M | 14.3% | 2025-Q4 stale (2 quarters behind) |
| Brooklyn Investment Group added | 43,799 | $762K | 1.0% | 2025-Q4 stale (2 quarters behind) |
| Peapod Lane Capital LLC trimmed | 37,817 | $639K | 0.8% | 2025-Q4 stale (2 quarters behind) |
| AlphaQuest LLC added | 27,604 | $467K | 0.6% | 2025-Q4 stale (2 quarters behind) |
| ExodusPoint Capital Management, LP new | 25,049 | $424K | 0.6% | 2025-Q4 stale (2 quarters behind) |
| GSA CAPITAL PARTNERS LLP added | 24,520 | $415K | 0.5% | 2025-Q4 stale (2 quarters behind) |
| ACADIAN ASSET MANAGEMENT LLC added | 22,058 | $372K | 0.5% | 2025-Q4 stale (2 quarters behind) |
| FourThought Financial Partners, LLC new | 16,339 | $276K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP new | 53,499 | $1M | 1.3% | 2025-Q3 stale (3 quarters behind) |
| Informed Momentum Co LLC added | 45,837 | $869K | 1.1% | 2025-Q3 stale (3 quarters behind) |
| Squarepoint Ops LLC trimmed | 26,803 | $508K | 0.7% | 2025-Q3 stale (3 quarters behind) |
| Cubist Systematic Strategies, LLC new | 22,770 | $432K | 0.6% | 2025-Q3 stale (3 quarters behind) |
| SummitTX Capital, L.P. new | 37,196 | $530K | 0.7% | 2025-Q2 stale (4 quarters behind) |
| Brevan Howard Capital Management LP new | 21,479 | $306K | 0.4% | 2025-Q2 stale (4 quarters behind) |
| Y-Intercept (Hong Kong) Ltd new | 20,184 | $288K | 0.4% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.