Security key
37364X109
GEOSPACE TECHNOLOGIES CORP - Common Stock (GEOS)
CUSIP: 37364X109
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 832,093
- Total 13F value
- $5,633,254
- Share change
- +79,789
- SEC-reported price per share
- $6.77
- Number of holders
- 17
- Value change
- +$533,959
- Number of buys
- 4
- Number of sells
- 8
- Shares outstanding
- 12,943,145
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
17
Top holders
10
GEOS full security history
Ownership snapshot
Full 13F holder table
GEOSPACE TECHNOLOGIES CORP SEC filings
GEOSPACE TECHNOLOGIES CORP company facts
Broader feeds
Reporting periods
Holder history for CUSIP 37364X109
Recent filing periods:
Ownership snapshot
Top reported holders of GEOS - GEOSPACE TECHNOLOGIES CORP - Common Stock (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
DISCIPLINED GROWTH INVEST...
Disclosed value leader
DISCIPLINED GROWTH INVEST...
Comparable rows
15/15
Latest evidence
31 Mar 2026
13F
13D/G
3/4/5
Lead comparable stake: 8.5%
13D/G row: DISCIPLINED GROWTH INVESTORS INC /MN
Showing 1-6 of 15 holder rows.
Quick read
DISCIPLINED GROWTH INVESTORS INC /MN leads the comparable SEC ownership view at 8.5%.
15 of 15 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 DISCIPLINED GROWTH INVESTORS INC /MN's linked filing trail.
Comparable ownership
Top 5
DISCIPLINED GROWTH INVESTORS INC /MN
8.5%
Tieton Capital Management, LLC
6.9%
DIMENSIONAL FUND ADVISORS LP
4.9%
VANGUARD CAPITAL MANAGEMENT LLC
4.6%
BlackRock, Inc.
2.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| DISCIPLINED GROWTH INVESTORS INC /MN |
13F
13D/G
Company
|
8.5%
from 13D/G
|
$13,437,397
1,101,426 shares
|
— | 31 Mar 2026 |
| Tieton Capital Management, LLC |
13F
13D/G
Company
|
6.9%
from 13D/G
|
$11,128,000
912,118 shares
|
— | 31 Mar 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 |
13F
13D/G
Company · Vanguard Capital Management
|
4.6%
from 13D/G
|
$7,039,790
577,032 shares
|
— | 31 Mar 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 |
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.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
17
Shares
832,093
Rows available
17
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
86
Q2 2026 holders
17
Holder diff
-69
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend