Ranked by reported Q1 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 | DISCIPLINED GROWTH INVESTORS INC /MN | 1.1M | $13.4M | -2.7% | 8.515% | 0.27% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 577K | $7.0M | — | 4.461% | 0.00% |
| 3 | DIMENSIONAL FUND ADVISORS LP | 491K | $6.0M | -9.8% | 3.796% | 0.00% |
| 4 | GRACE & WHITE INC /NY | 473K | $5.8M | +53.7% | 3.658% | 1.02% |
| 5 | SEI INVESTMENTS CO | 411K | $5.0M | +108.6% | 3.177% | 0.00% |
| 6 | First Eagle Investment Management, LLC | 240K | $2.9M | -44.2% | 1.855% | 0.00% |
| 7 | BlackRock, Inc. | 226K | $2.8M | +2.0% | 1.744% | 0.00% |
| 8 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 192K | $2.3M | -38.7% | 1.484% | 0.00% |
| 9 | Moors & Cabot, Inc. | 191K | $2.3M | -66.9% | 1.474% | 0.10% |
| 10 | MARSHALL WACE, LLP | 189K | $2.3M | +1502.1% | 1.460% | 0.00% |
| 11 | Glenorchy Capital Ltd | 173K | $2.1M | +1.4% | 1.340% | 1.08% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 152K | $1.9M | +4.1% | 1.176% | 0.00% |
| 13 | De Lisle Partners LLP | 147K | $1.8M | 0.0% | 1.137% | 0.21% |
| 14 | STATE STREET CORP | 137K | $1.7M | +8.7% | 1.058% | 0.00% |
| 15 | US BANCORP \DE\ | 127K | $1.6M | 0.0% | 0.983% | 0.00% |
| 16 | MILLENNIUM MANAGEMENT LLC | 107K | $1.3M | +73.2% | 0.830% | 0.00% |
| 17 | EagleClaw Capital Managment, LLC | 82K | $1.0M | +34.1% | 0.634% | 0.14% |
| 18 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 79K | $961K | -31.3% | 0.609% | 0.02% |
| 19 | VANGUARD FIDUCIARY TRUST CO | 76K | $928K | — | 0.588% | 0.00% |
| 20 | TWO SIGMA INVESTMENTS, LP | 74K | $902K | +26.8% | 0.571% | 0.00% |
| 21 | CITADEL ADVISORS LLC | 48K | $580K | — | 0.367% | 0.00% |
| 22 | NORTHERN TRUST CORP | 41K | $495K | +4.3% | 0.314% | 0.00% |
| 23 | 683 Capital Management, LLC | 39K | $479K | 0.0% | 0.303% | 0.04% |
| 24 | IRONWOOD INVESTMENT MANAGEMENT LLC | 36K | $440K | -2.0% | 0.279% | 0.18% |
| 25 | AMERICAN CENTURY COMPANIES INC | 29K | $358K | -2.7% | 0.227% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in GEOS — a direct measure of their conviction.
Filings activity in GEOS during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 86 | +4.9% | 75.67% | 35.73 pp | $71M | 32% |
| Q4 2025 | 82 | +28% | 111.40% | 18.27 pp | $105M | 14% |
| Q3 2025 | 64 | +1.6% | 129.67% | +31.55 pp | $122M | +32% |
| Q2 2025 | 63 | +5.0% | 98.12% | +43.15 pp | $92M | +78% |
| Q1 2025 | 60 | 15% | 54.97% | 24.45 pp | $52M | 31% |
| Q4 2024 | 71 | 1.4% | 79.42% | 3.61 pp | $75M | 4.4% |
| Q3 2024 | 72 | +4.3% | 83.03% | +11.42 pp | $78M | +16% |
| Q2 2024 | 69 | — | 71.61% | — | $67M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying GEOS stock.
Based on Q1 2026 13F filings, institutional ownership of Geospace Technologies Corporation stands at 75.7%, held across 86 reporting institutions.
DISCIPLINED GROWTH INVESTORS INC /MN is the largest reported institutional holder of GEOS, with approximately 1,101,426 shares worth $0.01B as of Q1 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of GEOS, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, MILLENNIUM MANAGEMENT LLC, TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for GEOS is 53 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
22 institutions opened new positions in GEOS during Q1 2026, while 18 fully exited. 9 added to existing positions and 55 trimmed.
GEOS institutional ownership fell by 35.73 percentage points quarter-over-quarter, with a net change of +4 holders.
The top 10 institutions account for 70.2% of all reported 13F value in GEOS, and the top 25 account for 93.4%.
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