Geospace Technologies Corporation (GEOS) Ownership
GEOS ownership summary
as of October 18, 2026- Institutions
- 41.5% of shares outstanding
- Insiders
- 3.13% of shares outstanding
- Shares outstanding
- 12.9M
- Float
- 12.6M shares available to trade
- Short interest
- 3.18% 400K shares short
- Days to cover
- 5.49 short interest down 7.0% vs prior month
- Institutions 41.54%
- Insiders 3.13%
- Other investors 55.33%
GEOS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Tieton Capital Management, LLC | 7.01% | 907K | $4.0M | −4,853 (−0.5%) | June 30, 2026 |
| 2 | Grace & White Inc | 5.20% | 673K | $3.0M | +200,035 (+42.3%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 3.98% | 515K | $2.3M | −61,965 (−10.7%) | June 30, 2026 |
| 4 | Dimensional Fund Advisors, Inc. | 3.03% | 392K | $1.7M | −98,593 (−20.1%) | June 30, 2026 |
| 5 | Marshall Wace Asset Management Ltd | 2.33% | 302K | $1.3M | +113,110 (+59.9%) | June 30, 2026 |
| 6 | BlackRock Inc | 1.79% | 232K | $1.0M | +6,197 (+2.7%) | June 30, 2026 |
| 7 | U.S. Bancorp | 1.64% | 213K | $938,298 | +85,632 (+67.4%) | June 30, 2026 |
| 8 | SEI Investments Co | 1.54% | 199K | $879,200 | −211,541 (−51.5%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 1.27% | 164K | $724,034 | +12,026 (+7.9%) | June 30, 2026 |
| 10 | State Street Corp | 1.26% | 163K | $719,161 | +26,222 (+19.2%) | June 30, 2026 |
| 11 | Robotti Robert | 0.99% | 128K | $566,403 | +128,436 (0.0%) | June 30, 2026 |
| 12 | Two Sigma Investments LLC | 0.64% | 82K | $362,431 | +8,277 (+11.2%) | June 30, 2026 |
| 13 | Bridgeway Capital Management, LLC | 0.62% | 80K | $351,446 | +900 (+1.1%) | June 30, 2026 |
| 14 | Vanguard Fiduciary Trust Co | 0.59% | 77K | $337,744 | +521 (+0.7%) | June 30, 2026 |
| 15 | Glenorchy Capital Ltd | 0.53% | 68K | $302,032 | −104,851 (−60.5%) | June 30, 2026 |
| 16 | CAMBRIDGE Invest RESEARCH ADVISORS, INC. | 0.46% | 60K | $263,409 | +15,433 (+34.8%) | June 30, 2026 |
| 17 | Citadel Advisors Llc | 0.45% | 58K | $255,859 | +25,300 (+77.3%) | June 30, 2026 |
| 18 | Eagleclaw Capital Management LLC | 0.39% | 50K | $220,566 | −32,000 (−39.0%) | June 30, 2026 |
| 19 | Renaissance Technologies Corp | 0.34% | 44K | $195,359 | +44,299 (0.0%) | June 30, 2026 |
| 20 | Acadian Asset Management LLC | 0.33% | 43K | $188,364 | +42,713 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 709K shares and 6 cut 514K.
GEOS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.76% | 357K | $1.6M | — | August 31, 2026 |
| 2 | VT De Lisle America B USD | 1.14% | 147K | $648,857 | — | September 30, 2026 |
| 3 | DFA US Micro Cap I | 0.83% | 107K | $471,253 | — | August 31, 2026 |
| 4 | Stt Strt® SPDR® S&PKenshoFutSecETF | 0.80% | 104K | $458,490 | — | September 30, 2026 |
| 5 | Fidelity Extended Market Index | 0.54% | 69K | $306,103 | +2,767 (+4.2%) | August 31, 2026 |
| 6 | Acuitas US Microcap Institutional | 0.37% | 47K | $208,372 | −1,260 (−2.6%) | June 30, 2026 |
| 7 | iShares Micro-Cap ETF | 0.32% | 41K | $180,682 | −283 (−0.7%) | September 30, 2026 |
| 8 | DFA US Core Equity 2 I | 0.26% | 34K | $150,094 | — | August 31, 2026 |
| 9 | DFA US Small Cap I | 0.25% | 32K | $142,558 | −26,316 (−44.9%) | August 31, 2026 |
| 10 | Dimensional US Core Equity 2 ETF | 0.20% | 26K | $116,032 | — | September 30, 2026 |
| 11 | Bridgeway Omni Small-Cap Value N | 0.20% | 26K | $115,110 | — | June 30, 2026 |
| 12 | Avantis US Small Cap Equity ETF | 0.19% | 25K | $109,364 | — | September 30, 2026 |
| 13 | Fidelity Total Market Index | 0.18% | 24K | $103,798 | — | August 31, 2026 |
| 14 | Invesco NASDAQ Future Gen 200 ETF | 0.18% | 23K | $100,350 | — | September 30, 2026 |
| 15 | EA Bridgeway Omni Small-Cap Value ETF | 0.16% | 20K | $89,483 | — | September 30, 2026 |
| 16 | Fidelity Series Total Market Index | 0.15% | 20K | $87,225 | — | August 31, 2026 |
| 17 | Dimensional US Small Cap ETF | 0.15% | 19K | $83,442 | — | September 30, 2026 |
| 18 | Dimensional US Equity Market ETF | 0.12% | 15K | $66,445 | — | September 30, 2026 |
| 19 | Goldman Sachs Absolute Ret Trckr Instl | 0.09% | 11K | $50,089 | +6,637 (+140.6%) | June 30, 2026 |
| 20 | EA Bridgeway Ultra-Small Company Mkt ETF | 0.08% | 10K | $44,100 | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
GEOS insider transactions
latest 3| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-02-22 | Robbin B Adams | Sell | $12.28 | 1,250 | $15,350 |
| 2024-02-20 | Robbin B Adams | Sell | $12.32 | 912 | $11,236 |
| 2024-02-14 | Robbin B Adams | Sell | $12.29 | 2,078 | $25,539 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
GEOS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns GEOS
Institutional investors own 41.5% of Geospace Technologies's shares and insiders 3.13%. The largest holder is Tieton Capital Management, LLC with 7.01% of the shares (907K), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 6 reduced their stake in the latest filings. Short interest is 3.18% of the float, or 5.49 days of average trading volume.
Related: GEOS key metrics. See the GEOS stock overview for the latest quote and news.
GEOS ownership FAQ
Who owns the most Geospace Technologies stock?
The largest shareholders of Geospace Technologies are Tieton Capital Management, LLC (7.01%), Grace & White Inc (5.20%), Vanguard Capital Management, LLC (3.98%), Dimensional Fund Advisors, Inc. (3.03%), Marshall Wace Asset Management Ltd (2.33%).
What percentage of Geospace Technologies is owned by institutions?
Institutions hold 41.5% of Geospace Technologies's shares outstanding; insiders hold 3.13%.
Which funds own Geospace Technologies?
The largest fund holders of Geospace Technologies are Vanguard MStar Total Stk Mkt Idx Invest (2.76%), VT De Lisle America B USD (1.14%), DFA US Micro Cap I (0.83%), Stt Strt® SPDR® S&PKenshoFutSecETF (0.80%), Fidelity Extended Market Index (0.54%).
What is Geospace Technologies's short interest?
400K shares of Geospace Technologies were sold short, 3.18% of the float; at the average daily volume it would take 5.49 days to cover.
Are insiders buying or selling Geospace Technologies?
Of the latest 3 reported insider transactions in Geospace Technologies (since February 14, 2024), 0 were purchases and 3 were sales.
How many shares of Geospace Technologies are outstanding?
Geospace Technologies has 12.9M shares outstanding, of which 12.6M are in the public float.