Geospace Technologies GEOS Institutional Ownership

Updated Oct 10, 2026

Geospace Technologies Corp (NASDAQ:GEOS) had 84 institutional holders reporting a position on Form 13F for the quarter ended June 30, 2026.

• Together they owned 39.84% of the outstanding stock in Q2 2026, down from 51.99% a quarter earlier.
• Total shares held in Geospace Technologies fell 23.34% from Q1 2026, while the number of holders rose 37.70% from Q2 2025.
• Among the 84 holders of Geospace Technologies, 44 added to their positions, 21 reduced their stakes and 19 left their positions unchanged.
• Altogether, institutional holders owned 5.15Mn GEOS shares at the end of Q2 2026, down 1.57Mn from the prior quarter and down 1.3Mn from a year earlier.
• Tieton Capital Management, LLC held the largest position in GEOS at 907.26K shares as of June 30, 2026, or 7.01% of shares outstanding.
• The biggest increases in GEOS positions during Q2 2026 came from Grace & White Inc (+200.03K shares), Marshall Wace, LLP (+113.11K shares), Us Bancorp De (+85.63K shares), State Street Corp (+26.22K shares) and Citadel Advisors LLC (+25.3K shares).
• Among holders that kept a stake in Geospace Technologies, the biggest sellers in Q2 2026 were SEI Investments Co (-211.54K shares), Moors & Cabot, Inc. (-171.1K shares), Susquehanna International Group, LLP (-113.37K shares), Glenorchy Capital Ltd (-104.85K shares) and Dimensional Fund Advisors LP (-98.59K shares).
• Per Business Quant data, the 10 largest holders of Geospace Technologies at the end of Q2 2026 were Tieton Capital Management, LLC (907.26K shares), Grace & White Inc (673.24K shares), Vanguard Capital Management LLC (515.07K shares), Dimensional Fund Advisors LP (392.42K shares), Marshall Wace, LLP (301.92K shares), BlackRock, Inc. (231.76K shares), Us Bancorp De (212.77K shares), SEI Investments Co (199.37K shares), Geode Capital Management, LLC (164.18K shares) and State Street Corp (163.07K shares).