As of November 6, 2026, Geospace Technologies Corp. is a publicly traded company (Nasdaq: GEOS); its largest reported holder is Grace & White Inc., with 6.13% on Schedule 13G of October 7, 2026. The largest insider holding is Walter R. Wheeler, a director, with 172,006 shares (1.3% of shares outstanding), per Form 4 of February 9, 2026 (Schedule 13G, October 7, 2026).
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Is Geospace Technologies Corp. a real, registered company?
- Geospace Technologies Corp files with the SEC under CIK 1001115 (its SEC filings).
- Its shares are listed under the ticker GEOS on Nasdaq (SEC company record).
- Incorporated in Texas; business address in Houston, Texas, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under GEOSPACE TECHNOLOGIES CORP in our court records and SEC 8-K records (as of 2026-11-06).
- Layoffs: 1 exit or restructuring plan reported on Form 8-K, Item 2.05 (latest filed 2026-04-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Grace & White Inc. (filed 2026-10-07).
Who are Geospace Technologies Corp.'s owners and officers?
Geospace Technologies Corp.: incorporated in Texas; business address in Houston, Texas; industry Measuring & Controlling Devices, NEC (Schedule 13G, 2026-10-07).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-10-07 | Grace & White Inc /Ny | 6.13% |
| Schedule 13G/A, 2026-08-14 | Disciplined Growth Investors Inc /Mn | 0% |
| Schedule 13G/A, 2026-07-31 | Vanguard Capital Management | 4.61% |
| Schedule 13G/A, 2026-05-15 | Disciplined Growth Investors Inc /Mn | 8.5% |
| Schedule 13G, 2026-04-29 | Vanguard Capital Management | 5.1% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-17 | Disciplined Growth Investors Inc /Mn | 8.8% |
| Schedule 13G, 2026-01-30 | The Vanguard Group | 5.02% |
| Schedule 13G/A, 2025-11-14 | Disciplined Growth Investors Inc /Mn | 9% |
| Schedule 13G/A, 2025-10-30 | The Vanguard Group | 4.94% |
| Schedule 13G/A, 2025-10-09 | Dimensional Fund Advisors LP | 4.9% |
| Schedule 13G/A, 2025-08-14 | Disciplined Growth Investors Inc /Mn | 9.7% |
Questions about who owns Geospace Technologies Corp.
Who owns Geospace Technologies Corp.?
On this page, one holder's latest ownership filing reports 5% or more of Geospace Technologies Corp.: Grace & White Inc /Ny (6.13%, Schedule 13G, filed 2026-10-07).
When did Grace & White Inc /Ny buy into Geospace Technologies Corp.?
The filings give report dates, not purchase dates. The earliest filing from Grace & White Inc /Ny on this page is the Schedule 13G, filed 2026-10-07, reporting 6.13%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Geospace Technologies Corp. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
19 cited sources found
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Which insiders own Geospace Technologies Corp. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director: 172,006 shares (1.3% of shares outstanding) (Form 4, 2026-02-09).
- , the senior vice president and chief technical officer: 74,921 shares (0.58% of shares outstanding) (Form 4, 2024-11-22).
- , a director: 65,454 shares (0.51% of shares outstanding) (Form 4, 2026-02-09).
- , the president and chief financial officer: 61,112 shares (0.47% of shares outstanding) (Form 4, 2025-12-05).
- , a director: 50,100 shares (0.39% of shares outstanding), 48,100 held directly and 2,000 indirectly (Form 4, 2026-02-09).
Shares outstanding: 12,935,603 as of 2026-07-31, from the company's latest SEC cover page.
How much has Geospace Technologies Corp. raised?
No fundraising or offering filing from Geospace Technologies Corp. is on file with us.
Red flags found
1 exit or restructuring plan on Form 8-K (latest Form 8-K, 2026-04-06).
Keep reading
More on Geospace Technologies Corp. and the records around it.
Geospace Technologies Corp. elsewhere on the record
- Layoff notices Apr 2026
Companies that share a holder
- GRACE & WHITE INC /NY also filed stake reports on 4 other companies: WESTPORT FUEL SYSTEMS INC. (Jan 2026), Orion Energy Systems, Inc. (Jan 2026)
- DISCIPLINED GROWTH INVESTORS INC /MN also filed stake reports on 10 other companies: Alarm.com Holdings, Inc. (Aug 2026), Kornit Digital Ltd. (Aug 2026), Stitch Fix, Inc. (Aug 2026)
- Dimensional Fund Advisors LP also filed stake reports on 366 other companies: Acadia Healthcare Co Inc (Oct 2026), ADT Inc (Oct 2026), AGCO Corp (Oct 2026)
Related pages
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