Comparable stake leader
Tieton Capital Management, LLC
SEC ownership of GEOSPACE TECHNOLOGIES CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001001115.
Disclosed value leader
DIMENSIONAL FUND ADVISORS LP
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- GEOS on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Tieton Capital Management, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Tieton Capital Management, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001001115
- Issuer location
- Houston, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of GEOSPACE TECHNOLOGIES CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Tieton Capital Management...
Disclosed value leader
DIMENSIONAL FUND ADVISORS LP
Comparable rows
50/50
Latest evidence
30 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 6.9%
13D/G row: Tieton Capital Management, LLC
Showing 1-8 of 50 holder rows.
Quick read
Tieton Capital Management, LLC leads the comparable SEC ownership view at 6.9%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Tieton Capital Management, LLC's linked filing trail.
Comparable ownership
Top 5
Tieton Capital Management, LLC
6.9%
DIMENSIONAL FUND ADVISORS LP
4.9%
VANGUARD CAPITAL MANAGEMENT LLC
4.6%
BlackRock, Inc.
2.7%
Walter R. Wheeler
1.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Tieton Capital Management, LLC |
13F
13D/G
Company
|
6.9%
from 13D/G
|
$6,142,000
907,265 shares
|
— | 30 Jun 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13D/G
13F
Company
|
4.9%
|
$10,412,654
628,404 shares
|
-$356,736 | 30 Sep 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
4.6%
|
$4,290,122
596,679 shares
|
-$441,782 | 30 Jun 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
2.7%
|
$4,871,245
341,602 shares
|
$0 | 30 Jun 2025 |
| Walter R. Wheeler |
3/4/5
Director
|
1.3%
|
$3,914,856
172,006 shares
|
— | 09 Feb 2026 |
| Thomas L. Davis |
3/4/5
Director
|
0.51%
|
$1,489,733
65,454 shares
|
— | 09 Feb 2026 |
| Robert L. Curda |
3/4/5
Vice President & CFO
|
0.47%
|
$1,588,300
61,112 shares
|
— | 05 Dec 2025 |
| Richard F. Miles |
3/4/5
Director
|
0.39%
|
$1,140,276
50,100 shares
|
— | 09 Feb 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 04 Sep 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-14 of 14 reporting-owner rows connected to GEOSPACE TECHNOLOGIES CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
14
Largest Forms 3/4/5 holder
Walter R. Wheeler
Net 12M change
$0
Latest report
09 Feb 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Walter R. Wheeler | Director | $3,914,856 | Mixed | 09 Feb 2026 | ||
| Gary D. Owens | Director | $3,245,693 | Mixed | 07 Feb 2024 | ||
| Robert L. Curda | Vice President & CFO | $1,588,300 | Mixed | 05 Dec 2025 | ||
| Thomas L. Davis | Director | $1,489,733 | Mixed | 09 Feb 2026 | ||
| Richard F. Miles | Director | $1,140,276 | Mixed | 09 Feb 2026 | ||
| Richard James Kelley | President & CEO | $1,090,982 | Mixed | 05 Dec 2025 | ||
| Edgar R. Giesinger Jr. | Director | $978,680 | Mixed | 09 Feb 2026 | ||
| Robbin B. Adams | SVP & Chief Technical Officer | $902,049 | Mixed | 21 Nov 2024 | ||
| Margaret Ashworth | Director | $782,944 | Mixed | 09 Feb 2026 | ||
| Michael J. Sheen | SVP & Chief Technical Officer | $472,346 | Mixed | 21 Nov 2022 | ||
| Stephen C. Jumper | Director | $339,124 | Mixed | 09 Feb 2026 | ||
| Ronald T. Bushey | Chief Technical Officer | $315,180 | Mixed | 05 Dec 2025 | ||
| Tina M. Langtry | Director | $175,863 | Mixed | 09 Feb 2023 | ||
| Kenneth Asbury | Director | $74,415 | Mixed | 02 Feb 2022 |
Recent insider transactions for GEOSPACE TECHNOLOGIES CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Richard F. Miles | GEOS | Common Stock | Award | 7.85% | 3,500 | 48,100 | 09 Feb 2026 | Direct | ||
| Thomas L. Davis | GEOS | Common Stock | Award | 5.65% | 3,500 | 65,454 | 09 Feb 2026 | Direct | ||
| Edgar R. Giesinger Jr. | GEOS | Common Stock | Award | 8.86% | 3,500 | 43,000 | 09 Feb 2026 | Direct | ||
| Richard James Kelley | GEOS | Common Stock | Tax liability | -0.65% | -275 | 41,977 | 05 Dec 2025 | Direct | ||
| Robert L. Curda | GEOS | Common Stock | Tax liability | -0.27% | -165 | 61,112 | 05 Dec 2025 | Direct | ||
| Ronald T. Bushey | GEOS | Common Stock | Tax liability | -2.22% | -275 | 12,127 | 02 Dec 2025 | Direct | ||
| Ronald Todd Bushey | GEOS | Comm | Award | 47.6% | 4,000 | 12,402 | 25 Nov 2025 | Direct | ||
| Robert L. Curda | GEOS | Common Stock | Award | 6.98% | 4,000 | 61,277 | 25 Nov 2025 | Direct | ||
| Richard James Kelley | GEOS | Common Stock | Award | 23.4% | 8,000 | 42,252 | 25 Nov 2025 | Direct | ||
| Ronald Todd Bushey | GEOS | Common Stock | Tax liability | -2.3% | -198 | 8,402 | 20 Nov 2025 | Direct | ||
| Ronald Todd Bushey | GEOS | Common Stock | Award | 72% | 3,600 | 8,600 | 20 Nov 2025 | Direct | ||
| Richard James Kelley | GEOS | Common Stock | Tax liability | -0.86% | -298 | 34,252 | 20 Nov 2025 | Direct | ||
| Richard James Kelley | GEOS | Common Stock | Award | 15% | 4,500 | 34,500 | 20 Nov 2025 | Direct | ||
| Robert L. Curda | GEOS | Common Stock | Tax liability | -0.34% | -198 | 57,277 | 20 Nov 2025 | Direct | ||
| Robert L. Curda | GEOS | Common Stock | Award | 6.68% | 3,600 | 57,475 | 20 Nov 2025 | Direct |
* marks a reported price that did not pass the local price check.