GEOS Geospace Technologies Corporation

NASDAQ
$5.38

Geospace Technologies Corporation (GEOS) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+0.00
4 buyers / 4 sellers
MIXED
Funds compared
8
funds with comparable GEOS positions
4 current holders · 7 prior-quarter holders
Net share change
+23.1K
+191.0K added, -167.9K cut
Position activity
1 new 3 increased 0 reduced 4 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
RENAISSANCE TECHNOLOGIES LLC Quant New +44.3K — $299.9K 0.0% 58
MILLENNIUM MANAGEMENT LLC Sold Out -107.4K -100.0% $727.0K 0.0% 57
Qube Research & Technologies Ltd Quant Sold Out -21.9K -100.0% $148.3K 0.0% 55
Hudson Bay Capital Management Event Sold Out -22.3K -100.0% $150.9K 0.0% 53
Schonfeld Strategic Advisors Long/Short Quant Sold Out -16.3K -100.0% $110.2K 0.0% 51
CITADEL ADVISORS LLC Quant Increased +25.3K +77.3% $171.3K 0.0% 46
MARSHALL WACE, LLP Long/Short Increased +113.1K +59.9% $765.8K 0.0% 40
TWO SIGMA INVESTMENTS, LP Quant Increased +8.3K +11.2% $56.0K 0.0% 28

Most significant buyers

By move score, not size.

  • RENAISSANCE TECHNOLOGIES LLC New · +44.3K
  • CITADEL ADVISORS LLC Increased · +25.3K
  • MARSHALL WACE, LLP Increased · +113.1K
  • TWO SIGMA INVESTMENTS, LP Increased · +8.3K

Most significant sellers

By move score, not size.

  • MILLENNIUM MANAGEMENT LLC Sold Out · -107.4K
  • Qube Research & Technologies Ltd Sold Out · -21.9K
  • Hudson Bay Capital Management Sold Out · -22.3K
  • Schonfeld Strategic Advisors Sold Out · -16.3K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
RENAISSANCE TECHNOLOGIES LLC 1 44.3K 0 +44.3K — 0.0% New 58
MILLENNIUM MANAGEMENT LLC 2 0 107.4K -107.4K -100.0% 0.0% Sold Out 57
Qube Research & Technologies Ltd 2 0 21.9K -21.9K -100.0% 0.0% Sold Out 55
Hudson Bay Capital Management 3 0 22.3K -22.3K -100.0% 0.0% Sold Out 53
Schonfeld Strategic Advisors 3 0 16.3K -16.3K -100.0% 0.0% Sold Out 51
CITADEL ADVISORS LLC 1 58.0K 32.7K +25.3K +77.3% 0.0% Increased 46
MARSHALL WACE, LLP 2 301.9K 188.8K +113.1K +59.9% 0.0% Increased 40
TWO SIGMA INVESTMENTS, LP 2 82.2K 73.9K +8.3K +11.2% 0.0% Increased 28

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.