IO Ion Geophysical Corporation
NYSENo longer listedCommon stock
IO was the NYSE ticker symbol of Ion Geophysical Corporation. It no longer appears in current US listing files, which usually means the security was delisted, acquired, merged, or moved to a new symbol.
IO at a glance
- Symbol
- IO
- Company / issuer
- Ion Geophysical Corporation
- Security type
- Common stock
- Last exchange
- NYSE
- Status
- No longer listed
- Seen in listing files
- Apr 2015 – Apr 2022
- Sector
- Energy
- Industry
- Oilfield Services/Equipment
- Country
- United States
- Last reported market cap
- $14.5 million (Apr 2022)
IO ticker history
All listing names we have recorded under the symbol IO, from periodic snapshots of US exchange listing files.
| Name | Security | First seen | Last seen |
|---|---|---|---|
| Ion Geophysical Corporation | Common Stock | Apr 2015 | Apr 2022 |
Snapshots have gaps (notably 2018–2021, and 2015–2021 for NYSE listings), so the actual delisting date may be later than the last-seen date.
Frequently asked questions
What company has the ticker symbol IO?
IO was the ticker symbol of Ion Geophysical Corporation on NYSE.
Is IO still trading?
No. IO does not appear in current US exchange listings as of Sep 2026; it was last seen in our listing snapshots in Apr 2022.
Which exchange was IO listed on?
IO was listed on NYSE.
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