Geospace Technologies Corporation (GEOS)
Nasdaq: GEOS · Measuring & Controlling Devices, NEC · Houston, TX · filing with the SEC since 1997
Who owns Geospace Technologies Corporation
As filed with the SECHolders of 5% or more
2
Tieton Capital Management, LLC holds 6.9% of Common Stock, as its SCHEDULE 13G/A filed Feb 11, 2025 says.
Directors and officers
9
report now, of 17 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Tieton Capital Management, LLC
SCHEDULE 13G/A · filed Feb 11, 2025 · Common Stock
Grace & White Inc /ny
SCHEDULE 13G · filed Oct 7, 2026 · Common Stock
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Oct 9, 2025 · Common Stock · reported falling below 5%, from 5.1% in Jan 23, 2025
Vanguard Capital Management
SCHEDULE 13G/A · filed Jul 31, 2026 · Common Stock · reported falling below 5%, from 5.1% in Apr 29, 2026
Blackrock, Inc.
SCHEDULE 13G/A · filed Jul 17, 2025 · Common Stock · reported falling below 5%
Disciplined Growth Investors Inc /mn
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock · reported falling below 5%, from 8.5% in May 15, 2026
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%, from 5.02% in Jan 30, 2026
What GEOS reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Geovox
A company bought · acquisition · Aug 2025 · owns, named in the 10-K filed Nov 21, 2025
7 subsidiaries in 3 countries, from the list filed with the 10-K filed Nov 21, 2025.
Insider tradesForm 4
0sales
0purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2024 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window
No one on the roster filed an open-market trade in the window.