GEOS

Geospace Technologies Corporation

A Houston-based maker of rugged sensing gear that listens to the ground, Geospace Technologies builds the geophones, hydrophones, and cable-free seismic nodes used by oil and gas crews to map what lies beneath the Earth's surface. Born in 1980 as OYO Geospace, a subsidiary of Japan's OYO Corporation, it struck out on its own and renamed itself Geospace Technologies in 2012. Beyond oil, its gear now tracks leaky water pipes, guards borders with seismic-acoustic sensors, and even spots intruders by their heartbeat.

CUSIP: 37364X109EnergyUS1 holder

Ownership Activity Financials Filings

Insiders

Ranked by how much each holding moved in all recorded history

Insider

Kobayashi KatsuhikoDirector, 10% owner · 22 transactions

1.29M—

as of Jan 2009

Bought 137.5K

Owens Gary DDirector · 199 transactions

590.1K—

as of Feb 2024

Granted 300.1K · Bought 283.4K · Sold 420.0K

Wheeler Walter R.Director · 18 transactions

172.0K—

as of Feb 2025

Granted 134.6K · Bought 7.0K · Sold 1.5K

Sheen Michael JSVP & Chief Technical Officer · 193 transactions

85.9K—

as of Nov 2022

Granted 265.0K · Sold 217.2K

McEntire Thomas TCFO & Secretary · 179 transactions

75.2K—

as of Nov 2019

Granted 183.7K · Bought 1.0K · Sold 132.5K

Adams Robbin B.SVP & Chief Technical Officer · 37 transactions

74.9K—

as of Nov 2024

Granted 102.7K · Sold 34.3K

Davis Thomas LDirector · 28 transactions

65.5K—

Granted 78.0K · Bought 5.1K · Sold 34.6K

Curda Robert L.Vice President & CFO · 9 transactions

61.1K—

Granted 49.1K

Miles Richard FDirector · 30 transactions

50.1K—

Granted 53.0K · Bought 10.0K · Sold 13.3K

Giesinger Edgar R. JR.Director · 11 transactions

43.0K—

Granted 43.0K

Kelley Richard JamesPresident & CEO · 6 transactions

42.0K—

Granted 22.5K

Ashworth MargaretDirector · 6 transactions

34.4K—

as of Feb 2025

Granted 34.4K

Langtry Tina MDirector · 15 transactions

32.0K—

as of Feb 2023

Granted 28.1K · Bought 3.9K

Moody William HDirector · 17 transactions

19.8K—

as of May 2020

Granted 17.2K · Bought 5.0K · Sold 6.3K

Jumper Stephen CDirector · 3 transactions

14.9K—

as of Feb 2025

Granted 14.9K

Still Charles HDirector · 32 transactions

13.6K—

as of Feb 2020

Granted 43.6K · Bought 1.9K · Sold 41.6K

Asbury KennethDirector · 3 transactions

13.5K—

as of Feb 2022

Granted 13.5K

Bushey Ronald ToddChief Technical Officer · 4 transactions

12.1K—

Granted 7.6K

Okuto RyuzoDirector · 2 transactions

1.4K—

as of Feb 2008

Granted 317 · Bought 335

Kanemori TakashiDirector, 10% owner · 1 transaction

0—

as of Feb 2012

Sold 1.29M

Oyo Corp10% owner · 23 transactions

0—

as of Feb 2012

Bought 137.5K · Sold 1.29M

Oyo Corp USA10% owner · 23 transactions

0—

as of Feb 2012

Bought 137.5K · Sold 1.29M

Rice LaceyVice President, HR · 15 transactions

0—

as of Sep 2013

Granted 5.5K · Sold 14.5K

White Richard CarlDirector · 7 transactions

0—

as of Mar 2008

Bought 1.2K

Insider	Stake change	Holds now	Granted / vested	Bought	Sold
Kobayashi KatsuhikoDirector, 10% owner · 22 transactions	—	1.29Mas of Jan 2009	—	137.5K	—
Owens Gary DDirector · 199 transactions	—	590.1Kas of Feb 2024	300.1K	283.4K	420.0K
Wheeler Walter R.Director · 18 transactions	—	172.0Kas of Feb 2025	134.6K	7.0K	1.5K
Sheen Michael JSVP & Chief Technical Officer · 193 transactions	—	85.9Kas of Nov 2022	265.0K	—	217.2K
McEntire Thomas TCFO & Secretary · 179 transactions	—	75.2Kas of Nov 2019	183.7K	1.0K	132.5K
Adams Robbin B.SVP & Chief Technical Officer · 37 transactions	—	74.9Kas of Nov 2024	102.7K	—	34.3K
Davis Thomas LDirector · 28 transactions	—	65.5K	78.0K	5.1K	34.6K
Curda Robert L.Vice President & CFO · 9 transactions	—	61.1K	49.1K	—	—
Miles Richard FDirector · 30 transactions	—	50.1K	53.0K	10.0K	13.3K
Giesinger Edgar R. JR.Director · 11 transactions	—	43.0K	43.0K	—	—
Kelley Richard JamesPresident & CEO · 6 transactions	—	42.0K	22.5K	—	—
Ashworth MargaretDirector · 6 transactions	—	34.4Kas of Feb 2025	34.4K	—	—
Langtry Tina MDirector · 15 transactions	—	32.0Kas of Feb 2023	28.1K	3.9K	—
Moody William HDirector · 17 transactions	—	19.8Kas of May 2020	17.2K	5.0K	6.3K
Jumper Stephen CDirector · 3 transactions	—	14.9Kas of Feb 2025	14.9K	—	—
Still Charles HDirector · 32 transactions	—	13.6Kas of Feb 2020	43.6K	1.9K	41.6K
Asbury KennethDirector · 3 transactions	—	13.5Kas of Feb 2022	13.5K	—	—
Bushey Ronald ToddChief Technical Officer · 4 transactions	—	12.1K	7.6K	—	—
Okuto RyuzoDirector · 2 transactions	—	1.4Kas of Feb 2008	317	335	—
Kanemori TakashiDirector, 10% owner · 1 transaction	—	0as of Feb 2012	—	—	1.29M
Oyo Corp10% owner · 23 transactions	—	0as of Feb 2012	—	137.5K	1.29M
Oyo Corp USA10% owner · 23 transactions	—	0as of Feb 2012	—	137.5K	1.29M
Rice LaceyVice President, HR · 15 transactions	—	0as of Sep 2013	5.5K	—	14.5K
White Richard CarlDirector · 7 transactions	—	0as of Mar 2008	—	1.2K	—

Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.