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IO

ION Geophysical Corporation
IO

Delisted

IO was delisted on the 18th of May, 2022.

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Fund managers haven’t disclosed any holdings of IO yet.

IO Hedge Fund Activity: Q3 2025 in Review

0 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in ION Geophysical Corporation (IO) for Q3 2025, worth a combined $0 — down 100% from $1 a quarter earlier.

Sellers outnumbered buyers: 1 fund closed out of IO and 0 opened new positions — a net loss of 1 holder — while 0 trimmed existing stakes and 0 added.

The largest seller was Huntington National Bank, exiting entirely with an estimated $1 sold.

  • 0 institutional investors held ION Geophysical Corporation (IO) as of Q3 2025, down from 1 in Q2 2025.
  • Funds reported $0 of ION Geophysical Corporation stock for Q3 2025, down 100% quarter-over-quarter.
  • 0 funds opened new ION Geophysical Corporation positions in Q3 2025 and 1 closed out, a net change of -1 holder.
  • The largest ION Geophysical Corporation seller in Q3 2025 was Huntington National Bank, an estimated $1 sold.

Based on aggregated 13F filings for Q3 2025.