Geospace Technologies Corporation (GEOS) has 20 known insider and institutional holders on record. The largest holder is YU CHI MING with 5,001,000 shares. Other notable holders include Protskiv Andriy and Kanemori Takashi.
Over the last 12 months, insiders have made 17 transactions in GEOS stock — 10 buys (valued at RSU Award) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
GEOS Insider Ownership
Top Holder
YU CHI MING
5,001,000 shares
Buys (12 mo)
10
$0.00 value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Yu Chi Ming |
10 Percent Owner, Officer: President |
5,001,000 |
2008-10-17 |
|
| 2 |
Protskiv Andriy |
10 Percent Owner, Officer: President, CEO, CFO |
5,000,000 |
2008-02-04 |
|
| 3 |
Kanemori Takashi |
10 Percent Owner |
1,290,950 |
2009-08-21 |
|
| 4 |
Kobayashi Katsuhiko |
10 Percent Owner |
1,288,139 |
2009-01-13 |
|
| 5 |
Oyo Corp Usa |
10 Percent Owner |
1,288,139 |
2009-01-13 |
|
| 6 |
Oyo Corp |
10 Percent Owner |
1,288,139 |
2009-01-13 |
|
| 7 |
Owens Gary D |
Director |
253,324 |
2024-02-08 |
|
| 8 |
Wheeler Walter R. |
Director |
172,006 |
2026-02-09 |
|
| 9 |
Sheen Michael J |
SVP & Chief Technical Officer |
85,881 |
2022-11-21 |
|
| 10 |
Mcentire Thomas T |
CFO & Secretary |
75,167 |
2019-11-22 |
|
| 11 |
Adams Robbin B. |
SVP & Chief Technical Officer |
74,921 |
2024-11-22 |
|
| 12 |
Davis Thomas L |
Director |
65,454 |
2026-02-09 |
|
| 13 |
Curda Robert L. |
Vice President & CFO |
61,112 |
2025-12-05 |
|
| 14 |
Miles Richard F |
Director |
48,100 |
2026-02-09 |
|
| 15 |
Giesinger Edgar R. Jr. |
Director |
43,000 |
2026-02-09 |
|
| 16 |
Kelley Richard James |
President & CEO |
41,977 |
2025-12-05 |
|
| 17 |
Ashworth Margaret |
Director |
34,400 |
2026-02-09 |
|
| 18 |
Langtry Tina M |
Director |
31,975 |
2023-02-10 |
|
| 19 |
Moody William H |
Director |
19,794 |
2020-05-13 |
|
| 20 |
Jumper Stephen C |
Director |
14,900 |
2026-02-09 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-02-09 |
Ashworth Margaret |
Director |
RSU Award |
3,500 |
- |
- |
| 2026-02-09 |
Giesinger Edgar R. Jr. |
Director |
RSU Award |
3,500 |
- |
- |
| 2025-02-09 |
Wheeler Walter R. |
Director |
RSU Award |
3,500 |
- |
- |
| 2026-02-09 |
Miles Richard F |
Director |
RSU Award |
3,500 |
- |
- |
| 2025-02-09 |
Jumper Stephen C |
Director |
RSU Award |
3,500 |
- |
- |
| 2026-02-09 |
Davis Thomas L |
Director |
RSU Award |
3,500 |
- |
- |
| 2025-12-02 |
Bushey Ronald Todd |
Chief Technical Officer |
Tax Withholding of RSU |
275 |
- |
- |
| 2025-11-25 |
Bushey Ronald Todd |
Chief Technical Officer |
RSU Award |
4,000 |
- |
- |
| 2025-11-20 |
Bushey Ronald Todd |
Chief Technical Officer |
Tax Withholding of RSU |
198 |
- |
- |
| 2025-12-05 |
Kelley Richard James |
President & CEO |
Tax Withholding of RSU |
275 |
- |
- |
| 2025-12-05 |
Curda Robert L. |
Vice President & CFO |
Tax Withholding of RSU |
165 |
- |
- |
| 2025-11-25 |
Curda Robert L. |
Vice President & CFO |
RSU Award |
4,000 |
- |
- |
| 2025-11-25 |
Bushey Ronald Todd |
Chief Technical Officer |
RSU Award |
4,000 |
- |
- |
| 2025-11-20 |
Bushey Ronald Todd |
Chief Technical Officer |
Tax Withholding of RSU |
198 |
- |
- |
| 2025-11-25 |
Kelley Richard James |
President & CEO |
RSU Award |
8,000 |
- |
- |
| 2025-11-20 |
Kelley Richard James |
President & CEO |
Tax Withholding of RSU |
298 |
- |
- |
| 2025-11-20 |
Curda Robert L. |
Vice President & CFO |
Tax Withholding of RSU |
198 |
- |
- |
