Geospace Technologies Corporati

Historical 13F Holders

Symbol
GEOS
CUSIP
37364X109
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 37364X109 since 12/18/2024, newest first.

Filer % of Class Filed
Grace & White Inc /NY 13G 6.1% 10/7/2026
Event 9/30/2026
Disciplined Growth Investors Inc /MN 13G/A Amendment 11 0% 8/14/2026
Event 6/30/2026
Vanguard Capital Management LLC 13G/A Amendment 1 4.6% 7/31/2026
Event 6/30/2026
Disciplined Growth Investors Inc /MN 13G/A Amendment 10 8.5% 5/15/2026
Event 3/31/2026
Vanguard Capital Management LLC 13G 5.1% 4/29/2026
Event 3/31/2026
Vanguard Group Inc 13G/A Amendment 1 0% 3/26/2026
Event 3/13/2026
Disciplined Growth Investors Inc /MN 13G/A Amendment 9 8.8% 2/17/2026
Event 12/31/2025
Vanguard Group Inc 13G 5.0% 1/30/2026
Event 12/31/2025
Disciplined Growth Investors Inc /MN 13G/A Amendment 8 9.0% 11/14/2025
Event 9/30/2025
Vanguard Group Inc 13G/A Amendment 1 4.9% 10/30/2025
Event 9/30/2025
Dimensional Fund Advisors LP 13G/A Amendment 1 4.9% 10/9/2025
Event 9/30/2025
Disciplined Growth Investors Inc /MN 13G/A Amendment 7 9.7% 8/14/2025
Event 6/30/2025
BlackRock, Inc. 13G/A Amendment 1 2.7% 7/17/2025
Event 6/30/2025
Disciplined Growth Investors Inc /MN 13G/A Amendment 6 9.9% 5/15/2025
Event 3/31/2025
Disciplined Growth Investors Inc /MN 13G/A Amendment 5 11.2% 2/14/2025
Event 12/31/2024
Tieton Capital Management, LLC 13G/A Amendment 2 6.9% 2/11/2025
Event 12/31/2024
Dimensional Fund Advisors LP 13G 5.1% 1/23/2025
Event 12/31/2024
Disciplined Growth Investors Inc /MN 13G/A Amendment 4 12.1% 11/14/2024
Event 9/30/2024

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 2 644 $3.15 k
2026 Q2 88 5.18 M $35.1 M
2026 Q1 89 6.72 M $82.0 M
2025 Q4 88 7.15 M $121 M
2025 Q3 75 7.05 M $134 M
2025 Q2 71 7.37 M $105 M
2025 Q1 65 8.31 M $59.9 M
2024 Q4 73 8.49 M $85.1 M
2024 Q3 76 8.44 M $87.3 M
2024 Q2 72 8.50 M $76.3 M
2024 Q1 74 8.21 M $108 M
2023 Q4 70 7.64 M $99.0 M
2023 Q3 48 5.86 M $66.2 M
2023 Q2 41 5.53 M $43.0 M
2023 Q1 40 5.38 M $37.9 M
2022 Q4 39 5.23 M $22.1 M
2022 Q3 32 6.42 M $28.3 M
2022 Q2 37 7.09 M $33.6 M
2022 Q1 47 7.65 M $44.0 M
2021 Q4 47 7.95 M $53.3 M
2021 Q3 47 8.04 M $76.7 M
2021 Q2 51 8.21 M $66.4 M
2021 Q1 50 7.71 M $70.4 M
2020 Q4 55 8.34 M $71.4 M
2020 Q3 70 8.16 M $50.4 M
2020 Q2 79 8.21 M $61.8 M
2020 Q1 76 9.27 M $59.3 M
2019 Q4 90 9.76 M $164 M
2019 Q3 91 9.27 M $142 M
2019 Q2 92 8.90 M $134 M
2019 Q1 89 8.40 M $109 M
2018 Q4 89 8.50 M $87.7 M
2018 Q3 92 8.63 M $118 M
2018 Q2 93 8.66 M $122 M
2018 Q1 88 10.4 M $103 M
2017 Q4 93 10.8 M $139 M
2017 Q3 90 10.4 M $185 M
2017 Q2 89 11.0 M $152 M
2017 Q1 94 11.3 M $183 M
2016 Q4 105 11.3 M $230 M
2016 Q3 98 11.5 M $223 M
2016 Q2 103 12.0 M $197 M
2016 Q1 100 12.8 M $158 M
2015 Q4 105 13.3 M $187 M
2015 Q3 117 14.9 M $205 M
2015 Q2 123 14.4 M $333 M
2015 Q1 126 14.1 M $234 M
2014 Q4 137 13.8 M $367 M
2014 Q3 147 14.8 M $520 M
2014 Q2 156 15.4 M $847 M
2014 Q1 163 14.6 M $969 M