Stock Ownership/GEOS

GEOSPACE TECHNOL (GEOS): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in GEOS · Energy. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
4
13F filers
Aggregate Value
$3.3M
Across holders
Last Price
$5.37
2026-08-24
Sector
Energy
GICS
Quarterly fund activity4 increased0 reduced5 exited
Full exits: Hudson Bay Capital Management LP, MILLENNIUM MANAGEMENT LLC, Schonfeld Strategic Advisors LLC, Qube Research & Technologies Ltd, First Eagle Investment Management, LLC
Institutional Holders of GEOS
↗
4 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund302K$2.0M62.1%0.0%Added$-147KQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund82K$556K16.9%0.0%Added+$56KQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund58K$393K11.9%0.0%Added+$34KQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund44K$300K9.1%0.0%Added—Q2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$2.0M· 62.1% of total· 0.0% port· 302K sh· $-147K QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$556K· 16.9% of total· 0.0% port· 82K sh· +$56K QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$393K· 11.9% of total· 0.0% port· 58K sh· +$34K QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCAdded
Hedge Fund
$300K· 9.1% of total· 0.0% port· 44K sh· — QoQ· Q2 2026
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