GEOS · NASDAQ · Oil & Gas Equipment & Services

Geospace Technologies (GEOS)

Builds sensing and connection products across water, energy, and industrial markets.

$5.16
vs last close−0.18 (−3.37%)

13F · 13D/G · Form 4

Institutions39.86%5.16M shares
89 holders · as of Jun 30, 2026
Insiders4.39%568.0K shares
10 holders · as of Feb 9, 2026
Other55.75%7.21M shares
remainder

12.94M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

13F · 13D/G · Form 4

HolderStakeSharesDate
Disciplined Growth Investors, Inc.Institution
11.52%1.49Mfiled Feb 14, 2024
Tieton Capital Management, LLCInstitution
7.01%907,265as of Jun 30, 2026
Grace & White Inc /NYInstitution
5.20%673,236as of Jun 30, 2026
Vanguard Capital Management LLCInstitution
3.98%515,067as of Jun 30, 2026
Dimensional Fund Advisors LPInstitution
3.03%392,423as of Jun 30, 2026
Marshall Wace, LLPInstitution
2.33%301,916as of Jun 30, 2026
BlackRock, Inc.Institution
1.79%231,765as of Jun 30, 2026
US Bancorp \DE\Institution
1.64%212,766as of Jun 30, 2026
SEI Investments CoInstitution
1.54%199,365as of Jun 30, 2026
Walter R. WheelerInsiderdirector
1.33%172,006filed Feb 9, 2026
Geode Capital Management, LLCInstitution
1.27%164,180as of Jun 30, 2026
State Street CorpInstitution
1.26%163,075as of Jun 30, 2026
De Lisle Partners LLPInstitution
1.14%147,133as of Jun 30, 2026
Robotti RobertInstitution
0.99%128,436as of Jun 30, 2026
Capital Management, LLCInstitution
0.82%105,951filed Jun 8, 2018
Two Sigma Investments, LPInstitution
0.64%82,184as of Jun 30, 2026
Bridgeway Capital Management, LLCInstitution
0.62%79,693as of Jun 30, 2026
Vanguard Fiduciary Trust CoInstitution
0.59%76,586as of Jun 30, 2026
Robbin B. AdamsInsiderofficer: SVP & Chief Technical Officer
0.58%74,921filed Nov 22, 2024
Glenorchy Capital LtdInstitution
0.53%68,488as of Jun 30, 2026
Thomas L. DavisInsiderdirector
0.51%65,454filed Feb 9, 2026
Robert L. CurdaInsiderofficer: Vice President & CFO
0.47%61,112filed Dec 5, 2025
Citadel Advisors LLCInstitution
0.45%58,018as of Jun 30, 2026
Eagleclaw Capital Managment, LLCInstitution
0.39%50,015as of Jun 30, 2026
Richard F. MilesInsiderdirector
0.37%48,100filed Feb 9, 2026

13F, as of Jun 30, 2026

89 holders · 5.16M shares · 21 new positions · 44 increased · 22 reduced · 23 closed

HolderShares% outstandingChg q/qFiled
Tieton Capital Management, LLC907.3K7.01%−4.9KAug 10, 2026
Grace & White Inc /NY673.2K5.20%+200.0KJul 17, 2026
Vanguard Capital Management LLC515.1K3.98%−62.0KAug 13, 2026
Dimensional Fund Advisors LP392.4K3.03%−98.6KAug 11, 2026
Marshall Wace, LLP301.9K2.33%+113.1KAug 13, 2026
BlackRock, Inc.231.8K1.79%+6.2KAug 7, 2026
US Bancorp \DE\212.8K1.64%+85.6KAug 12, 2026
SEI Investments Co199.4K1.54%−211.5KAug 14, 2026

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
Tieton Capital Management, LLC6.90%885.7K13GFeb 11, 2025

Form 4

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