Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in GEOS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | GRACE & WHITE INC /NY | 673K | $4.6M | +42.3% | 5.205% | 0.72% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 515K | $3.5M | -10.7% | 3.982% | 0.00% |
| 3 | DIMENSIONAL FUND ADVISORS LP | 392K | $2.7M | -20.1% | 3.034% | 0.00% |
| 4 | MARSHALL WACE, LLP | 302K | $2.0M | +59.9% | 2.334% | 0.00% |
| 5 | BlackRock, Inc. | 232K | $1.6M | +2.8% | 1.792% | 0.00% |
| 6 | US BANCORP \DE\ | 213K | $1.4M | +67.4% | 1.645% | 0.00% |
| 7 | SEI INVESTMENTS CO | 199K | $1.3M | -51.5% | 1.541% | 0.00% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 164K | $1.1M | +7.9% | 1.269% | 0.00% |
| 9 | STATE STREET CORP | 163K | $1.1M | +19.2% | 1.261% | 0.00% |
| 10 | De Lisle Partners LLP | 147K | $998K | 0.0% | 1.137% | 0.11% |
| 11 | ROBOTTI ROBERT | 128K | $870K | β | 0.993% | 0.14% |
| 12 | CITADEL ADVISORS LLC | 105K | $710K | +120.8% | 0.811% | 0.00% |
| 13 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 87K | $591K | -54.6% | 0.674% | 0.00% |
| 14 | TWO SIGMA INVESTMENTS, LP | 82K | $556K | +11.2% | 0.635% | 0.00% |
| 15 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 80K | $540K | +1.1% | 0.616% | 0.01% |
| 16 | VANGUARD FIDUCIARY TRUST CO | 77K | $518K | +0.7% | 0.592% | 0.00% |
| 17 | Glenorchy Capital Ltd | 68K | $464K | -60.5% | 0.529% | 0.02% |
| 18 | JANE STREET GROUP, LLC | 67K | $452K | β | 0.516% | 0.00% |
| 19 | EagleClaw Capital Managment, LLC | 50K | $339K | -39.0% | 0.387% | 0.05% |
| 20 | RENAISSANCE TECHNOLOGIES LLC | 44K | $300K | β | 0.343% | 0.00% |
| 21 | RAFFA WEALTH MANAGEMENT, LLC | 20 | $277K | β | 0.000% | 0.00% |
| 22 | IRONWOOD INVESTMENT MANAGEMENT LLC | 36K | $246K | +0.7% | 0.281% | 0.08% |
| 23 | JACOBS LEVY EQUITY MANAGEMENT, INC | 36K | $241K | β | 0.275% | 0.00% |
| 24 | Kingsview Wealth Management, LLC | 31K | $212K | +10.4% | 0.242% | 0.00% |
| 25 | NORTHERN TRUST CORP | 29K | $194K | -29.3% | 0.222% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in GEOS β a direct measure of their conviction.
Filings activity in GEOS during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 84 | 3.4% | 40.98% | 11.48 pp | $29M | 59% |
| Q1 2026 | 87 | +4.8% | 52.46% | +2.67 pp | $71M | 33% |
| Q4 2025 | 83 | +26% | 49.79% | 2.44 pp | $107M | 15% |
| Q3 2025 | 66 | +4.8% | 52.23% | +1.37 pp | $126M | +37% |
| Q2 2025 | 63 | +5.0% | 50.86% | 5.51 pp | $92M | +78% |
| Q1 2025 | 60 | 15% | 56.37% | 2.71 pp | $52M | 31% |
| Q4 2024 | 71 | 1.4% | 59.08% | 1.63 pp | $75M | 4.4% |
| Q3 2024 | 72 | β | 60.71% | β | $78M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying GEOS stock.
Based on Q2 2026 13F filings, institutional ownership of Geospace Technologies Corporation stands at 41.0%, held across 84 reporting institutions.
GRACE & WHITE INC /NY is the largest reported institutional holder of GEOS, with approximately 673,236 shares worth $0.00B as of Q2 2026.
Yes β 5 widely-followed marquee investors appear among the top 25 institutional holders of GEOS, including CITADEL ADVISORS LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, TWO SIGMA INVESTMENTS, LP, JANE STREET GROUP, LLC, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for GEOS is 52 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
18 institutions opened new positions in GEOS during Q2 2026, while 21 fully exited. 5 added to existing positions and 57 trimmed.
GEOS institutional ownership fell by 11.48 percentage points quarter-over-quarter, with a net change of -3 holders.
The top 10 institutions account for 69.5% of all reported 13F value in GEOS, and the top 25 account for 91.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Geospace Technologies Corporation (GEOS) Institutional Ownership