GEOS · Geospace Technologies Corp · Holdings

$4.52 +0.13 (+2.85%)

Market Cap

$56.79M

12.94M

Volume · Oct 27 14.95K Avg daily vol (3M) 109.77K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of GEOS: 13F, 13D and 13G, insiders and funds →

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 81

Total Value: $35,202,387

Total Shares: 5,420,957

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 82 13F filers

Top Holder

17.1%

of institutional value

Top 5

52.6%

of institutional value

Top 10

71.0%

of institutional value

HHI

742

Broadly held

Who Holds GEOS

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 82 filers, like-for-like change -23.3%; actively managed books -28.4%; index-like books -0.4%.

Holder type	Share	Filers	Change	New	Exited
Registered adviser	64.9%	44	-33.1%	11	12
Exempt adviser	5.9%	1	+43.3%	0	1
Adviser	0.2%	1	new	1	0
Bank	8.3%	8	+23.1%	1	3
Broker-dealer	0.0%	1	-58.3%	0	0
Non-US	2.9%	3	-13.7%	0	0
Holding company	11.7%	7	-8.0%	2	0
Benefit plan	0.0%	0	-100.0%	0	1
Insurer	0.0%	0	—	0	0
Unknown	6.1%	17	-3.8%	4	4

Style	Share	Filers	Change	New	Exited
Index-like	23.7%	9	-0.4%	1	1
Systematic-like	3.7%	6	-20.4%	3	2
Concentrated	3.1%	11	+438.5%	2	3
Diversified active	69.5%	56	-31.4%	13	15
Not measured	0.0%	0	—	0	0
Unknown	0.0%	0	—	0	0

Turnover	Share	Filers	Change	New	Exited
Low turnover	69.7%	46	-29.7%	7	9
Medium turnover	7.3%	18	-17.6%	6	7
High turnover	11.0%	13	+18.5%	5	5
Unknown	12.0%	5	-8.6%	1	0
Not measured	0.0%	0	—	0	0

Holding horizon	Share	Filers	Change	New	Exited
Short horizon	13.4%	10	0.0%	4	0
Medium horizon	9.4%	16	-16.8%	2	1
Long horizon	69.2%	52	-29.7%	12	15
Unknown	8.1%	4	+9.8%	1	5
Not measured	0.0%	0	—	0	0

13F book size	Share	Filers	Change	New	Exited
Under $1B	40.3%	20	+10.3%	4	4
$1B to $10B	3.9%	21	-86.4%	6	5
$10B to $100B	9.6%	14	-13.0%	5	6
$100B or more	46.2%	27	-14.7%	4	6
Not measured	0.0%	0	—	0	0

Client base	Share	Filers	Change	New	Exited
Individuals and high net worth	19.1%	29	-9.2%	7	3
Pooled investment vehicles	4.4%	6	-24.3%	3	4
Registered funds and BDCs	22.7%	5	-25.4%	0	2
Other	0.4%	1	+14.2%	0	0
Diversified	18.3%	3	-53.5%	1	2
Governments and sovereign funds	0.0%	0	-100.0%	0	1
Pension and profit sharing plans	0.0%	0	—	0	0
Insurance companies	0.0%	0	—	0	0
Other investment advisers	0.0%	0	—	0	0
Unknown	35.1%	38	+4.8%	8	9

Private funds	Share	Filers	Change	New	Exited
Hedge funds	12.5%	9	-64.6%	3	6
Private equity funds	0.0%	2	-19.4%	0	0
Real estate funds	0.1%	2	new	2	0
Securitized asset funds	0.0%	1	0.0%	0	0
Other private funds	9.2%	2	-41.7%	0	2
Private funds, type not stated	0.4%	1	new	1	0
No private funds	48.6%	28	-3.0%	5	5
Unknown	29.3%	37	-0.5%	8	8

Location	Share	Filers	Change	New	Exited
United States	89.2%	72	-25.4%	17	16
Outside the US	10.8%	10	-0.8%	2	5

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 2 holders with no observed 2026-06-30 13F.

Conviction and Crowding

82 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders

0.000% of filers hold it in their top 10

Mar 31, 2026: 0

Holders above 5%

median weight 0.000%

Mar 31, 2026: 0

Crowding

9.52%

of shares outstanding, 29th percentile

Mar 31, 2026: 21.6%

Private-fund advisers

8.81%

of shares outstanding

Institutional ownership

39.8%

41.7% of the estimated free float

Top 10 holders

73.0%

of 13F shares, Herfindahl 0.078

Active holders

-28.4%

like-for-like share change of active filers

5% stakes on record

0 13D, 1 13G (1 institutional, 0 passive, 0 exempt)

How long holders have held it value-weighted 13.5 quarters

Under 1 year 32.8% 1 to 3 years 18.3% 3 years or more 48.9% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost

$11.62

estimated per share

Mar 31, 2026: $13.64

Quarter-end price

$6.77

implied by 13F values

Estimated gain or loss

-41.7%

price against the estimated cost

Estimated at a loss

100.0%

of costed 13F value

Estimated cost covers 43.6% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies GEOS's active holders also own, quarter ended Mar 31, 2026

#	Company	Shared holders	Similarity
1	AAPL Apple Inc.	3	0.017

Shareholder Targets

13F filers that own its peers but not GEOS, quarter ended Mar 31, 2026

Found through its holder-overlap peers: AAPL. 6,059 filers in all.

#	Filer	In peers	Of book	Largest peers
1	VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active	$84,115,410,188 1 held	4.41%	AAPL
2	JPMORGAN CHASE & CO Bank, Diversified active	$58,783,383,151 1 held	3.93%	AAPL
3	Berkshire Hathaway Inc Insurer, Concentrated	$57,843,260,491 1 held	22.0%	AAPL
4	PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active	$50,866,271,888 1 held	5.90%	AAPL
5	Invesco Ltd. Adviser, Diversified active	$28,325,688,181 1 held	3.62%	AAPL
6	Legal & General Group Plc Unknown, Index-like	$27,441,647,769 1 held	6.35%	AAPL
7	GOLDMAN SACHS GROUP INC Holding company, Index-like	$27,050,306,886 1 held	3.60%	AAPL
8	Bank of New York Mellon Corp Bank, Index-like	$23,377,071,219 1 held	4.33%	AAPL
9	Nuveen, LLC Unknown, Index-like	$19,923,280,937 1 held	5.42%	AAPL
10	Amundi Holding company, Diversified active	$18,547,637,108 1 held	5.06%	AAPL

Fund Ownership of GEOS by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 6.31% of shares outstanding.

Fund type	Of shares outstanding	Change	Shares	Funds
Index funds	1.24%	+0.14 pp	160,190	13
Index ETFs	5.07%	-0.16 pp	656,039	5
Active ETFs	1.25%	-0.35 pp	162,032	11
Active funds	4.54%	+1.35 pp	587,573	22
Unclassified	0.22%	+0.22 pp	28,201	4
All registered funds	12.32%	+1.20 pp	1,594,035	55

How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 43 Exempt adviser 1 Adviser 1 Bank 8 Broker-dealer 1 Non-US 3 Holding company 7 Unknown 17

Showing 86 of 86

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Tieton Capital Management, LLC

$6,142,184

17.45%

907,265

GRACE & WHITE INC /NY

$3,880,205

11.02%

793,498

VANGUARD CAPITAL MANAGEMENT LLC

$3,487,003

9.91%

515,067

DIMENSIONAL FUND ADVISORS LP

$2,656,702

7.55%

392,423

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	824	$5,578	0.2%	Defined
DFA Australia Ltd.	13,478	$91,246	3.4%	Defined
Dimensional Ireland Ltd	18,780	$127,140	4.8%	Defined
Held directly	359,341	$2,432,738	91.6%	Sole

MARSHALL WACE, LLP

$2,043,971

5.81%

301,916

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	301,916	$2,043,971	100.0%	Other

BlackRock, Inc.

$1,569,048

4.46%

231,765

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	3,181	$21,535	1.4%	Sole
BlackRock Fund Advisors	42,952	$290,785	18.5%	Sole
BlackRock Institutional Trust Company, N.A.	185,632	$1,256,728	80.1%	Sole

US BANCORP \DE\

$1,440,425

4.09%

212,766

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
US BANK NATIONAL ASSOCIATION	212,766	$1,440,425	100.0%	Defined

SEI INVESTMENTS CO

$1,349,701

3.83%

199,365

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI TRUST CO	199,365	$1,349,701	100.0%	Sole

GEODE CAPITAL MANAGEMENT, LLC

$1,111,498

3.16%

164,180

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	28,652	$193,974	17.5%	Defined
Held directly	135,528	$917,524	82.5%	Defined

STATE STREET CORP

$1,104,017

3.14%

163,075

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SSGA FUNDS MANAGEMENT, INC. joint	163,075	$1,104,017	100.0%	Defined

De Lisle Partners LLP

$996,090

2.83%

147,133

ROBOTTI ROBERT

$869,511

2.47%

128,436

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Robotti & Co Advisors, LLC	126,986	$859,695	98.9%	Other
Held directly	1,450	$9,816	1.1%	Sole

TWO SIGMA INVESTMENTS, LP

$556,385

1.58%

82,184

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$539,521

1.53%

79,693

VANGUARD FIDUCIARY TRUST CO

$518,487

1.47%

76,586

Glenorchy Capital Ltd

$463,663

1.32%

68,488

CITADEL ADVISORS LLC

$392,780

1.12%

58,018

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	35,996	$243,692	62.0%	Defined
Held directly	22,022	$149,088	38.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$366,934

1.04%

54,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	54,200	$366,934	100.0%	Other

EagleClaw Capital Managment, LLC

$338,601

0.96%

50,015

RENAISSANCE TECHNOLOGIES LLC

$299,904

0.85%

44,299

ACADIAN ASSET MANAGEMENT LLC

$289,167

0.82%

42,713

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	42,713	$289,167	100.0%	Defined

IRONWOOD INVESTMENT MANAGEMENT LLC

$245,608

0.70%

36,279

JACOBS LEVY EQUITY MANAGEMENT, INC

$240,829

0.68%

35,573

CITADEL ADVISORS LLC

$225,441

0.64%

33,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	33,300	$225,441	100.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$223,606

0.64%

33,029

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	33,029	$223,606	100.0%	Other

Kingsview Wealth Management, LLC

$211,785

0.60%

31,283

HRT FINANCIAL LP

$207,541

0.59%

30,656

Cambridge Investment Research Advisors, Inc.

$202,186

0.57%

29,865

NORTHERN TRUST CORP

$194,414

0.55%

28,717

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	28,717	$194,414	100.0%	Defined

AMERICAN CENTURY COMPANIES INC

$190,920

0.54%

28,201

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	28,201	$190,920	100.0%	Defined

JANE STREET GROUP, LLC

$179,405

0.51%

26,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	26,500	$179,405	100.0%	Defined

GOLDMAN SACHS GROUP INC

$174,665

0.50%

25,800

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	11,463	$77,604	44.4%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	14,337	$97,061	55.6%	Defined

Mraz, Amerine & Associates, Inc.

$165,086

0.47%

24,385

Vestmark Advisory Solutions, Inc.

$164,599

0.47%

24,313

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ELEVATION POINT WEALTH PARTNERS, LLC	24,313	$164,599	100.0%	Other

ELEVATION POINT WEALTH PARTNERS, LLC

$164,599

0.47%

24,313

IMC-Chicago, LLC

$156,603

0.44%

23,132

COMMONWEALTH EQUITY SERVICES, LLC

$152,297

0.43%

22,496

JANE STREET GROUP, LLC

$144,004

0.41%

21,271

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	21,271	$144,004	100.0%	Defined

Empowered Funds, LLC

$137,370

0.39%

20,291

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Bridgeway Capital Management, LLC	20,291	$137,370	100.0%	Other

Tannin Capital LLC

$133,077

0.38%

19,657

AXQ CAPITAL, LP

$132,942

0.38%

19,637

Moors & Cabot, Inc.

$132,015

0.38%

19,500

JANE STREET GROUP, LLC

$128,630

0.37%

19,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	19,000	$128,630	100.0%	Defined

GSA CAPITAL PARTNERS LLP

$104,921

0.30%

15,498

MORGAN STANLEY

$103,274

0.29%

15,255

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY CAPITAL SERVICES, LLC	13,848	$93,750	90.8%	Defined
MORGAN STANLEY SMITH BARNEY LLC	1,175	$7,954	7.7%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	232	$1,570	1.5%	Defined

CITADEL ADVISORS LLC

$92,072

0.26%

13,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	13,600	$92,072	100.0%	Defined

XTX Topco Ltd

$90,954

0.26%

13,435

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	13,435	$90,954	100.0%	Defined

Invesco Ltd.

$85,843

0.24%

12,680

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Capital Management LLC	12,680	$85,843	100.0%	Defined

WELLS FARGO & COMPANY/MN

$84,272

0.24%

12,448

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	388	$2,626	3.1%	Defined
WELLS FARGO CLEARING SERVICES, LLC	12,060	$81,646	96.9%	Defined

HUB Investment Partners, LLC

$67,700

0.19%

10,000

UBS Group AG

$49,664

0.14%

7,336

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	372	$2,518	5.1%	Defined
UBS Securities LLC	6,964	$47,146	94.9%	Defined

Vanguard Global Advisers, LLC

$34,026

0.10%

5,026

Arax Advisory Partners

$31,548

0.09%

4,660

PNC FINANCIAL SERVICES GROUP, INC.

$27,080

0.08%

4,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	4,000	$27,080	100.0%	Other

SIMPLEX TRADING, LLC

$14,047

0.04%

2,075

JPMORGAN CHASE & CO

$10,974

0.03%

1,621

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	1,621	$10,974	100.0%	Defined

OSAIC HOLDINGS, INC.

$9,322

0.03%

1,377

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	1,377	$9,322	100.0%	Defined

FMR LLC

$8,083

0.02%

1,194

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	1,194	$8,083	100.0%	Defined
STRATEGIC ADVISERS LLC	0	$0	0.0%	Defined

SBI Securities Co., Ltd.

$7,902

0.02%

1,616

GROUP ONE TRADING LLC

$7,277

0.02%

1,075

JONES FINANCIAL COMPANIES LLLP

$7,176

0.02%

1,060

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	1,060	$7,176	100.0%	Sole

Larson Financial Group LLC

$5,808

0.02%

858

MCGUIRE CAPITAL ADVISORS INC

$5,077

0.01%

750

Parvin Asset Management, LLC

$5,077

0.01%

750

MCF Advisors LLC

$5,009

0.01%

740

HARBOUR INVESTMENTS, INC.

$3,486

0.01%

515

INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC

$2,708

0.01%

400

CoreCap Advisors, LLC

$2,445

0.01%

500

ROYAL BANK OF CANADA

$2,416

0.01%

357

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	357	$2,416	100.0%	Defined

Aventura Private Wealth, LLC

$2,031

0.01%

300

Nemes Rush Group LLC

$1,895

0.01%

280

Hurley Capital, LLC

$1,394

0.00%

206

Kingdom Financial Group LLC.

$1,191

0.00%

176

IFP Advisors, Inc

$1,134

0.00%

232

Farther Finance Advisors, LLC

$704

0.00%

144

Strategic Wealth Partners, Ltd.

$677

0.00%

100

BNP PARIBAS ARBITRAGE, SA

$514

0.00%

SIGNATUREFD, LLC

$264

0.00%

Caitong International Asset Management Co., Ltd

$209

0.00%

Transamerica Financial Advisors, LLC

$182

0.00%

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

$169

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	25	$169	100.0%	Defined

Root Financial Partners, LLC

$166

0.00%

Buck Wealth Strategies, LLC

$135

0.00%

Allworth Financial LP

$101

0.00%

Optiver Holding B.V.

$40

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	6	$40	100.0%	Defined

Capital Advisors, Ltd. LLC

0.00%

122

Key facts CIK 1001115 CUSIP 37364X109 13F (30d) 7 filings 7 filers Visit website Investor relations