Security Snapshot

GEOSPACE TECHNOLOGIES CORP - Common Stock (GEOS) Institutional Ownership

CUSIP: 37364X109

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

86

Shares (Excl. Options)

6,722,982

Price

$12.20

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Type / Class
Equity / Common Stock
Symbol
GEOS on Nasdaq
Shares outstanding
12,957,953
Price per share
$9.90
All holders as of 31 Mar 2026
Q1 2026
Total 13F shares
6,722,982
Total reported value
$82,011,454
% of total 13F portfolios
0%
Share change
-453,523
Value change
-$7,147,776
Number of holders
86
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Key facts

  • GEOS - GEOSPACE TECHNOLOGIES CORP - Common Stock is tracked under CUSIP 37364X109.
  • 86 institutions reported positions in Q1 2026.
  • 5 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 84 to 86 between Q4 2025 and Q1 2026.
  • Reported value moved from $120,932,660 to $82,011,454.

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 86 institutions filings for Q1 2026.

Open SEC Evidence

Security key

37364X109

Latest holder period

Q1 2026

13F holders

86

13D/G owners

5

CIK / CUSIP context first

Open Q1 2026 holders GEOS full holder history GEOSPACE TECHNOLOGIES CORP SEC filings GEOSPACE TECHNOLOGIES CORP company facts GEOSPACE TECHNOLOGIES CORP insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows
5
Security
GEOS
Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
DISCIPLINED GROWTH INVESTORS INC /MN 8.5% -3.3% $10,221,233 -$279,718 1,101,426 -2.7% DISCIPLINED GROWTH INVESTORS INC /MN 31 Mar 2026
Tieton Capital Management, LLC 6.9% $5,446,975 885,687 Tieton Capital Management, LLC 31 Dec 2024
VANGUARD CAPITAL MANAGEMENT LLC 5.1% $8,029,101 658,123 Vanguard Capital Management 31 Mar 2026
DIMENSIONAL FUND ADVISORS LP 4.9% -4% $10,412,654 -$356,736 628,404 -3.3% Dimensional Fund Advisors LP 30 Sep 2025
BlackRock, Inc. 2.7% $4,871,245 341,602 BlackRock, Inc. 30 Jun 2025

As of 31 Mar 2026, 86 institutional investors reported holding 6,722,982 shares of GEOSPACE TECHNOLOGIES CORP - Common Stock (GEOS). This represents 52% of the company’s total 12,957,953 outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
48%
Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
DISCIPLINED GROWTH INVESTORS INC /MN 8.5% 1,101,426 -2.7% 0.27% $13,437,397
Tieton Capital Management, LLC 7% 912,118 +3.2% 3.7% $11,128,000
VANGUARD CAPITAL MANAGEMENT LLC 4.5% 577,032 0% 0% $7,039,790
DIMENSIONAL FUND ADVISORS LP 3.8% 491,016 -9.8% 0% $5,989,798
GRACE & WHITE INC /NY 3.7% 473,201 +54% 1% $5,773,052
SEI INVESTMENTS CO 3.2% 410,906 +109% 0% $5,013,053
First Eagle Investment Management, LLC 1.9% 240,000 -44% 0% $2,928,000
BlackRock, Inc. 1.7% 225,568 +2% 0% $2,751,930
Moors & Cabot, Inc. 1.5% 190,600 -67% 0.1% $2,325,320
MARSHALL WACE, LLP 1.5% 188,806 +1502% 0% $2,303,432
Glenorchy Capital Ltd 1.3% 173,339 +1.4% 1.1% $2,114,738
GEODE CAPITAL MANAGEMENT, LLC 1.2% 152,154 +4.1% 0% $1,857,342
De Lisle Partners LLP 1.1% 147,133 0% 0.21% $1,787,666
SUSQUEHANNA INTERNATIONAL GROUP, LLP 1.1% 146,395 -37% 0% $1,786,019
STATE STREET CORP 1.1% 136,853 +8.7% 0% $1,669,607
US BANCORP \DE\ 0.98% 127,134 0% 0% $1,551,035
MILLENNIUM MANAGEMENT LLC 0.83% 107,386 +73% 0% $1,310,109
EagleClaw Capital Managment, LLC 0.63% 82,015 +34% 0.14% $1,000,583
BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.61% 78,793 -31% 0.02% $961,275
VANGUARD FIDUCIARY TRUST CO 0.59% 76,065 0% 0% $927,993
TWO SIGMA INVESTMENTS, LP 0.57% 73,907 +27% 0% $901,665
Cambridge Investment Research Advisors, Inc. 0.34% 44,297 -24% 0% $540,000
NORTHERN TRUST CORP 0.31% 40,596 +4.3% 0% $495,271
683 Capital Management, LLC 0.3% 39,252 0% 0.04% $478,874
IRONWOOD INVESTMENT MANAGEMENT LLC 0.28% 36,042 -2% 0.18% $439,712

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods
49
Latest
Q1 2026
Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 6,722,982 $82,011,454 -$7,147,776 $12.20 86
2025 Q4 7,150,608 $120,932,660 +$1,683,712 $16.91 84
2025 Q3 7,049,687 $133,655,336 -$4,677,131 $18.96 69
2025 Q2 7,322,201 $104,420,941 -$9,753,455 $14.26 62
2025 Q1 8,114,980 $58,502,042 -$3,746,718 $7.21 61
2024 Q4 8,493,657 $85,109,531 -$2,065,817 $10.02 72
2024 Q3 8,436,396 $87,239,231 -$1,281,010 $10.34 72
2024 Q2 8,481,286 $76,158,231 -$217,964 $8.98 68
2024 Q1 8,159,848 $107,622,398 +$5,579,104 $13.19 68
2023 Q4 7,606,990 $98,583,217 +$16,283,302 $12.96 62
2023 Q3 5,856,069 $75,835,938 +$4,437,420 $12.95 44
2023 Q2 5,532,940 $42,990,259 +$1,234,666 $7.77 37
2023 Q1 5,378,621 $37,919,394 +$1,939,647 $7.05 37
2022 Q4 5,183,381 $21,872,890 -$1,304,750 $4.22 31
2022 Q3 6,417,395 $28,298,445 -$3,163,198 $4.41 27
2022 Q2 7,089,416 $33,603,479 -$2,994,728 $4.74 33
2022 Q1 7,651,779 $44,006,748 -$1,862,715 $5.75 39
2021 Q4 7,946,676 $53,271,874 -$605,683 $6.71 39
2021 Q3 8,036,121 $76,736,242 -$1,551,020 $9.55 41
2021 Q2 8,211,485 $66,427,052 +$3,945,960 $8.09 43
2021 Q1 7,713,755 $70,349,186 +$3,313,524 $9.12 44
2020 Q4 7,572,584 $64,826,113 -$3,621,073 $8.56 51
2020 Q3 8,159,878 $50,427,424 -$681,204 $6.18 65
2020 Q2 8,212,672 $61,791,009 -$7,873,133 $7.52 74
2020 Q1 9,254,935 $59,213,416 -$4,244,187 $6.40 70
2019 Q4 9,566,211 $160,372,850 +$5,097,923 $16.77 84
2019 Q3 9,262,523 $142,363,336 +$5,936,196 $15.37 81
2019 Q2 8,878,323 $134,101,031 +$8,351,018 $15.11 81
2019 Q1 8,396,844 $108,673,265 +$1,493,689 $12.94 84
2018 Q4 8,374,913 $86,333,609 -$2,714,115 $10.31 81
2018 Q3 8,569,452 $117,373,264 +$1,372,088 $13.70 85
2018 Q2 8,464,281 $119,019,450 -$17,828,225 $14.06 87
2018 Q1 10,321,379 $101,865,962 -$4,383,092 $9.87 79
2017 Q4 10,750,107 $139,443,122 -$2,623,864 $12.97 86
2017 Q3 10,383,677 $185,169,806 -$11,072,899 $17.82 87
2017 Q2 11,007,146 $152,228,472 -$4,252,676 $13.83 82
2017 Q1 11,258,227 $182,732,137 +$24,053,814 $16.23 88
2016 Q4 11,241,427 $228,893,997 -$5,451,522 $20.36 100
2016 Q3 11,454,153 $222,980,688 -$10,546,161 $19.48 93
2016 Q2 12,024,399 $196,848,241 -$10,782,289 $16.37 91
2016 Q1 12,750,448 $157,438,556 -$8,255,608 $12.34 89
2015 Q4 13,145,288 $184,945,911 -$2,544,381 $14.07 94
2015 Q3 13,932,453 $192,406,207 -$16,065,707 $13.81 104
2015 Q2 14,428,047 $332,567,940 +$7,709,012 $23.05 112
2015 Q1 14,062,395 $232,161,086 +$1,834,073 $16.51 111
2014 Q4 13,614,279 $360,770,462 -$17,739,626 $26.50 125
2014 Q3 13,298,708 $467,027,525 -$78,628,186 $35.15 132
2014 Q2 14,546,049 $801,183,223 -$13,097,958 $55.08 139
2014 Q1 14,645,915 $969,003,714 -$41,453,678 $66.17 151
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