Latest Period
Q1 2026
Security Snapshot
GEOSPACE TECHNOLOGIES CORP - Common Stock (GEOS) Institutional Ownership
CUSIP: 37364X109
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
86
Shares (Excl. Options)
6,722,982
Price
$12.20
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- Security type / class
- Equity / Common Stock
- Symbol
- GEOS on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 6,722,982
- Total 13F value
- $82,011,454
- Portfolio coverage rank
- 0%
- Share change
- -453,523
- Value change
- -$7,147,776
- Number of holders
- 86
- Shares outstanding
- 12,957,953
- SEC-reported price per share
- $8.69
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- GEOS - GEOSPACE TECHNOLOGIES CORP - Common Stock is tracked under CUSIP 37364X109.
- 86 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 84 to 86 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $120,932,660 to $82,011,454.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 86 institutions filings for Q1 2026.
Security key
37364X109
Latest holder period
Q1 2026
13F holders
86
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
GEOS full holder history
GEOSPACE TECHNOLOGIES CORP SEC filings
GEOSPACE TECHNOLOGIES CORP company facts
GEOSPACE TECHNOLOGIES CORP insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 37364X109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
GEOS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| DISCIPLINED GROWTH INVESTORS INC /MN | 8.5% | -3.3% | $10,221,233 | -$279,718 | 1,101,426 | -2.7% | DISCIPLINED GROWTH INVESTORS INC /MN | 31 Mar 2026 |
| Tieton Capital Management, LLC | 6.9% | $5,446,975 | 885,687 | Tieton Capital Management, LLC | 31 Dec 2024 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.1% | $8,029,101 | 658,123 | Vanguard Capital Management | 31 Mar 2026 | |||
| DIMENSIONAL FUND ADVISORS LP | 4.9% | -4% | $10,412,654 | -$356,736 | 628,404 | -3.3% | Dimensional Fund Advisors LP | 30 Sep 2025 |
| BlackRock, Inc. | 2.7% | $4,871,245 | 341,602 | BlackRock, Inc. | 30 Jun 2025 |
As of 31 Mar 2026, 86 institutional investors reported holding 6,722,982 shares of GEOSPACE TECHNOLOGIES CORP - Common Stock (GEOS). This represents 52% of the company’s total 12,957,953 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
48%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| DISCIPLINED GROWTH INVESTORS INC /MN | 8.5% | 1,101,426 | -2.7% | 0.27% | $13,437,397 |
| Tieton Capital Management, LLC | 7% | 912,118 | +3.2% | 3.7% | $11,128,000 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 577,032 | 0% | 0% | $7,039,790 |
| DIMENSIONAL FUND ADVISORS LP | 3.8% | 491,016 | -9.8% | 0% | $5,989,798 |
| GRACE & WHITE INC /NY | 3.7% | 473,201 | +54% | 1% | $5,773,052 |
| SEI INVESTMENTS CO | 3.2% | 410,906 | +109% | 0% | $5,013,053 |
| First Eagle Investment Management, LLC | 1.9% | 240,000 | -44% | 0% | $2,928,000 |
| BlackRock, Inc. | 1.7% | 225,568 | +2% | 0% | $2,751,930 |
| Moors & Cabot, Inc. | 1.5% | 190,600 | -67% | 0.1% | $2,325,320 |
| MARSHALL WACE, LLP | 1.5% | 188,806 | +1502% | 0% | $2,303,432 |
| Glenorchy Capital Ltd | 1.3% | 173,339 | +1.4% | 1.1% | $2,114,738 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.2% | 152,154 | +4.1% | 0% | $1,857,342 |
| De Lisle Partners LLP | 1.1% | 147,133 | 0% | 0.21% | $1,787,666 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.1% | 146,395 | -37% | 0% | $1,786,019 |
| STATE STREET CORP | 1.1% | 136,853 | +8.7% | 0% | $1,669,607 |
| US BANCORP \DE\ | 0.98% | 127,134 | 0% | 0% | $1,551,035 |
| MILLENNIUM MANAGEMENT LLC | 0.83% | 107,386 | +73% | 0% | $1,310,109 |
| EagleClaw Capital Managment, LLC | 0.63% | 82,015 | +34% | 0.14% | $1,000,583 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.61% | 78,793 | -31% | 0.02% | $961,275 |
| VANGUARD FIDUCIARY TRUST CO | 0.59% | 76,065 | 0% | 0% | $927,993 |
| TWO SIGMA INVESTMENTS, LP | 0.57% | 73,907 | +27% | 0% | $901,665 |
| Cambridge Investment Research Advisors, Inc. | 0.34% | 44,297 | -24% | 0% | $540,000 |
| NORTHERN TRUST CORP | 0.31% | 40,596 | +4.3% | 0% | $495,271 |
| 683 Capital Management, LLC | 0.3% | 39,252 | 0% | 0.04% | $478,874 |
| IRONWOOD INVESTMENT MANAGEMENT LLC | 0.28% | 36,042 | -2% | 0.18% | $439,712 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 6,722,982 | $82,011,454 | -$7,147,776 | $12.20 | 86 |
| 2025 Q4 | 7,150,608 | $120,932,660 | +$1,683,712 | $16.91 | 84 |
| 2025 Q3 | 7,049,687 | $133,655,336 | -$4,677,131 | $18.96 | 69 |
| 2025 Q2 | 7,322,201 | $104,420,941 | -$9,753,455 | $14.26 | 62 |
| 2025 Q1 | 8,114,980 | $58,502,042 | -$3,746,718 | $7.21 | 61 |
| 2024 Q4 | 8,493,657 | $85,109,531 | -$2,065,817 | $10.02 | 72 |
| 2024 Q3 | 8,436,396 | $87,239,231 | -$1,281,010 | $10.34 | 72 |
| 2024 Q2 | 8,481,286 | $76,158,231 | -$217,964 | $8.98 | 68 |
| 2024 Q1 | 8,159,848 | $107,622,398 | +$5,579,104 | $13.19 | 68 |
| 2023 Q4 | 7,606,990 | $98,583,217 | +$16,283,302 | $12.96 | 62 |
| 2023 Q3 | 5,856,069 | $75,835,938 | +$4,437,420 | $12.95 | 44 |
| 2023 Q2 | 5,532,940 | $42,990,259 | +$1,234,666 | $7.77 | 37 |
| 2023 Q1 | 5,378,621 | $37,919,394 | +$1,939,647 | $7.05 | 37 |
| 2022 Q4 | 5,183,381 | $21,872,890 | -$1,304,750 | $4.22 | 31 |
| 2022 Q3 | 6,417,395 | $28,298,445 | -$3,163,198 | $4.41 | 27 |
| 2022 Q2 | 7,089,416 | $33,603,479 | -$2,994,728 | $4.74 | 33 |
| 2022 Q1 | 7,651,779 | $44,006,748 | -$1,862,715 | $5.75 | 39 |
| 2021 Q4 | 7,946,676 | $53,271,874 | -$605,683 | $6.71 | 39 |
| 2021 Q3 | 8,036,121 | $76,736,242 | -$1,551,020 | $9.55 | 41 |
| 2021 Q2 | 8,211,485 | $66,427,052 | +$3,945,960 | $8.09 | 43 |
| 2021 Q1 | 7,713,755 | $70,349,186 | +$3,313,524 | $9.12 | 44 |
| 2020 Q4 | 7,572,584 | $64,826,113 | -$3,621,073 | $8.56 | 51 |
| 2020 Q3 | 8,159,878 | $50,427,424 | -$681,204 | $6.18 | 65 |
| 2020 Q2 | 8,212,672 | $61,791,009 | -$7,873,133 | $7.52 | 74 |
| 2020 Q1 | 9,254,935 | $59,213,416 | -$4,244,187 | $6.40 | 70 |