GEOS · Geospace Technologies Corp

$5.38 +0.22 (+4.26%) At close · Sep 4

Market Cap

$69.59M

12.94M

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 →

Quarter:

Holders: 83

Total Value: $35,894,808

Total Shares: 5,302,046

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 83 13F filers · Δ vs Mar 31, 2026

Top Holder

17.1%

+0.9 pts

Top 5

52.6%

+0.2 pts

Top 10

70.9%

−0.0 pts

HHI

741

Broadly held+4

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -3

Institutional value: -56.6%

Shares held: -21.8%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Small GRACE & WHITE INC /NY	+200,035	673,236
Large MARSHALL WACE, LLP	+113,110	301,916
Large US BANCORP \DE\	+85,632	212,766
Mega CITADEL ADVISORS LLC	+57,400	104,918
Mega STATE STREET CORP	+26,222	163,075

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Large SEI INVESTMENTS CO	−211,541	199,365
Mid Moors & Cabot, Inc.	−171,100	19,500
Mid Glenorchy Capital Ltd	−104,851	68,488
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	−104,766	87,229
Mega DIMENSIONAL FUND ADVISORS LP	−98,593	392,423

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Small ROBOTTI ROBERT	128,436	$869,511
Mega JANE STREET GROUP, LLC	66,771	$452,039
Large RENAISSANCE TECHNOLOGIES LLC	44,299	$299,904
Large ACADIAN ASSET MANAGEMENT LLC	42,713	$289,167
Large JACOBS LEVY EQUITY MANAGEMENT, INC	35,573	$240,829

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid DISCIPLINED GROWTH INVESTORS INC /MN	1,101,426	$13,437,397
Large First Eagle Investment Management, LLC	240,000	$2,928,000
Mega MILLENNIUM MANAGEMENT LLC	107,386	$1,310,109
Mid 683 Capital Management, LLC	39,252	$478,874
Large Hudson Bay Capital Management LP	22,293	$271,974

Filter: New 20 Increased 23 Reduced 22 Sold out 23 Unchanged 18

Showing 88 of 88

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Tieton Capital Management, LLC

$6,142,184

17.11%

907,265

GRACE & WHITE INC /NY

$4,557,807

12.70%

673,236

VANGUARD CAPITAL MANAGEMENT LLC

$3,487,003

9.71%

515,067

DIMENSIONAL FUND ADVISORS LP

$2,656,702

7.40%

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

5.69%

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

4.37%

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

4.01%

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

3.76%

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

3.10%

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

3.08%

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

2.78%

147,133

ROBOTTI ROBERT

$869,511

2.42%

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

1.55%

82,184

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$539,521

1.50%

79,693

VANGUARD FIDUCIARY TRUST CO

$518,487

1.44%

76,586

Glenorchy Capital Ltd

$463,663

1.29%

68,488

CITADEL ADVISORS LLC

$392,780

1.09%

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

1.02%

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

0.94%

50,015

RENAISSANCE TECHNOLOGIES LLC

$299,904

0.84%

44,299

ACADIAN ASSET MANAGEMENT LLC

$289,167

0.81%

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

0.68%

36,279

JACOBS LEVY EQUITY MANAGEMENT, INC

$240,829

0.67%

35,573

CITADEL ADVISORS LLC

$225,441

0.63%

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

0.62%

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

0.59%

31,283

HRT FINANCIAL LP

$207,541

0.58%

30,656

Cambridge Investment Research Advisors, Inc.

$202,186

0.56%

29,865

NORTHERN TRUST CORP

$194,414

0.54%

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

0.53%

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

0.50%

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

0.49%

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

0.46%

24,385

Vestmark Advisory Solutions, Inc.

$164,599

0.46%

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

0.46%

24,313

IMC-Chicago, LLC

$156,603

0.44%

23,132

COMMONWEALTH EQUITY SERVICES, LLC

$152,297

0.42%

22,496

JANE STREET GROUP, LLC

$144,004

0.40%

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

0.38%

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

0.37%

19,657

AXQ CAPITAL, LP

$132,942

0.37%

19,637

Moors & Cabot, Inc.

$132,015

0.37%

19,500

JANE STREET GROUP, LLC

$128,630

0.36%

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

0.29%

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

0.25%

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

0.23%

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

0.09%

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%	Defined

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

SBI Securities Co., Ltd.

$10,906

0.03%

1,611

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

Integrated Wealth Concepts LLC

$7,785

0.02%

1,150

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

CoreCap Advisors, LLC

$3,385

0.01%

500

INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC

$2,708

0.01%

400

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

IFP Advisors, Inc

$1,570

0.00%

232

Hurley Capital, LLC

$1,394

0.00%

206

Farther Finance Advisors, LLC

$1,245

0.00%

184

Kingdom Financial Group LLC.

$1,191

0.00%

176

Capital Advisors, Ltd. LLC

$825

0.00%

122

Triumph Capital Management

$677

0.00%

100

Strategic Wealth Partners, Ltd.

$677

0.00%

100

TOTH FINANCIAL ADVISORY CORP

$677

0.00%

100

BNP PARIBAS ARBITRAGE, SA

$514

0.00%

SIGNATUREFD, LLC

$365

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

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

Key facts CIK 1001115 CUSIP 37364X109 13F (30d) 61 filings 61 filers Visit website