83 institutional investment managers reported GEOS positions in their Form 13F filings for Q2 2026, holding 5,185,311 shares worth $35.1M in total. Tieton Capital Management, LLC reported the largest position.

Are funds buying or selling GEOS?

In Q2 2026, 20 managers opened new GEOS positions, 24 added, 21 trimmed and 21 sold out. Managers that filed in both quarters sold a net 1,537,181 shares.

How current is this GEOS institutional ownership data?

It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Funds · GEOS

Who owns GEOS?

Institutional ownership of Geospace Technologies Corporation from Form 13F, Q2 2026

83 institutional managers reported holding Geospace Technologies Corporation (GEOS) in Form 13F filings for Q2 2026, with 5,185,311 shares worth $35.1M. The largest reported holder was Tieton Capital Management, LLC. Managers that filed both quarters cut a net 1,537,181 shares (-22.9%). 20 opened new positions and 21 sold out.

Funds holding: 83
Value held: $35.1M
New / sold out: 20 / 21
Net shares, same filers: -22.9%

Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

Largest holders of GEOS

Fund	Value	Share of 13F holdings	Shares	Move
Tieton Capital Management, LLC	$6.1M	17.5%	907,265	Trimmed
Grace & White Inc	$4.6M	13.0%	673,236	Added
Vanguard Capital Management LLC	$3.5M	9.9%	515,067	Trimmed
Dimensional Fund Advisors LP	$2.7M	7.6%	392,423	Trimmed
Marshall Wace, LLP	$2.0M	5.8%	301,916	Added
BlackRock, Inc.	$1.6M	4.5%	231,765	Added
US Bancorp \de\	$1.4M	4.1%	212,766	Added
Sei Investments Co	$1.3M	3.8%	199,365	Trimmed
Geode Capital Management, LLC	$1.1M	3.2%	164,180	Added
State Street Corp	$1.1M	3.1%	163,075	Added
De Lisle Partners LLP	$998K	2.8%	147,133	Unchanged
Robotti Robert	$870K	2.5%	128,436	New
Two Sigma Investments, LP	$556K	1.6%	82,184	Added
Bridgeway Capital Management, LLC	$540K	1.5%	79,693	Added
Vanguard Fiduciary Trust Co	$518K	1.5%	76,586	Added
Glenorchy Capital Ltd	$464K	1.3%	68,488	Trimmed
Cambridge Investment Research Advisors, Inc.	$404K	1.2%	59,730	Added
Citadel Advisors LLC	$393K	1.1%	58,018	Added
EagleClaw Capital Managment, LLC	$339K	1.0%	50,015	Trimmed
Renaissance Technologies LLC	$300K	0.9%	44,299	New
Acadian Asset Management LLC	$286K	0.8%	42,713	New
Ironwood Investment Management LLC	$246K	0.7%	36,279	Added
Jacobs Levy Equity Management, Inc	$241K	0.7%	35,573	New
Susquehanna International Group, LLP	$224K	0.6%	33,029	Trimmed
Kingsview Wealth Management, LLC	$212K	0.6%	31,283	Added

Share of 13F holdings is each fund's shares as a share of the 5,185,311 GEOS shares all 13F filers reported, not of shares outstanding.

Biggest buyers in Q2 2026

Grace & White Inc Added+$1.4M
Robotti Robert New+$870K
Marshall Wace, LLP Added+$766K
US Bancorp \de\ Added+$580K
Renaissance Technologies LLC New+$300K
Acadian Asset Management LLC New+$286K
Jacobs Levy Equity Management, Inc New+$241K
HRT Financial LP New+$207K
State Street Corp Added+$178K
Goldman Sachs Group Inc New+$175K

Biggest sellers in Q2 2026

Disciplined Growth Investors Inc Sold out-$13.4M
First Eagle Investment Management, LLC Sold out-$2.9M
Sei Investments Co Trimmed-$1.4M
Millennium Management LLC Sold out-$1.3M
Moors & Cabot, Inc. Trimmed-$1.2M
Susquehanna International Group, LLP Trimmed-$767K
Glenorchy Capital Ltd Trimmed-$710K
Dimensional Fund Advisors LP Trimmed-$667K
683 Capital Management, LLC Sold out-$479K
Vanguard Capital Management LLC Trimmed-$420K

The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $6.2M and sold $25.4M; 24 added and 21 trimmed.

Schedule 13D and 13G filings on GEOS

Owners of more than 5% must file within days, so these can be newer than the 13F data.

2026-10-07GRACE & WHITE INC /NY SCHEDULE 13G filed by Geospace Technologies CorporationSchedule 13G
2026-01-30VANGUARD GROUP INC SCHEDULE 13G filed by Geospace Technologies CorporationSchedule 13G
2025-01-23DIMENSIONAL FUND ADVISORS LP SCHEDULE 13G filed by Geospace Technologies CorporationSchedule 13G

Questions about GEOS ownership

Who owns GEOS stock?: 83 institutional investment managers reported GEOS positions in their Form 13F filings for Q2 2026, holding 5,185,311 shares worth $35.1M in total. Tieton Capital Management, LLC reported the largest position.
Are funds buying or selling GEOS?: In Q2 2026, 20 managers opened new GEOS positions, 24 added, 21 trimmed and 21 sold out. Managers that filed in both quarters sold a net 1,537,181 shares.
How current is this GEOS institutional ownership data?: It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.

From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to GEOS by CUSIP. Options are left out. GEOS news and filings · GEOS insider trades · Top funds