13F Insight
DOSSIER · 13F Holders · Q1 2026Defensive growthQuality

Geospace Technologies

88 institutions still hold Geospace Technologies as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 37364x109·88 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 0.6%
vs prior quarter
13F value held
$64M
46.0% inst. owned
of float
Holders
88
-44 QoQ
filers reporting
Activity
+15 / −50
+884 added · −815 reduced
this quarter
Concentration
21.06%
DISCIPLINED GROWTH INVESTORS INC /MN #1
top holder share
AI Holders Summary · Q1 2026

88 institutions reported Geospace Technologies in Q1 2026. DISCIPLINED GROWTH INVESTORS INC /MN leads at 21.1% of the visible book. -44 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
DISCIPLINED GROWTH INVESTORS INC /MN
CIK 0001050442
$13M1.1M0.28%Q1 202602
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$7M577K0.00%Q1 202603
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$6M491K0.00%Q1 202604
GRACE & WHITE INC /NY
CIK 0000903064
$6M473K1.02%Q1 202605
SEI INVESTMENTS CO
CIK 0000350894
$5M411K0.00%Q1 202606
First Eagle Investment Management, LLC
CIK 0001325447
$3M240K0.01%Q1 202607
BlackRock, Inc.
CIK 0002012383
$3M226K0.00%Q1 202608
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$2M192K0.00%Q1 202609
Moors & Cabot, Inc.
CIK 0001607239
$2M191K0.10%Q1 202610
CITADEL ADVISORS LLC
CIK 0001423053
$2M126K0.00%Q4 202511
Glenorchy Capital Ltd
CIK 0002008506
$2M173K0.12%Q1 202612
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$2M152K0.00%Q1 202613
De Lisle Partners LLP
CIK 0002011184
$2M147K0.21%Q1 202614
STATE STREET CORP
CIK 0000093751
$2M137K0.00%Q1 202615
US BANCORP \DE\
CIK 0000036104
$2M127K0.00%Q1 202616
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$1M107K0.00%Q1 202617
EagleClaw Capital Managment, LLC
CIK 0001607636
$1M82K0.14%Q1 202618
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 0001107261
$961,27579K0.02%Q1 202619
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$927,99376K0.00%Q1 202620
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$901,66574K0.00%Q1 2026
Page 1 of 5
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