Key facts
- This page summarizes Christopher Theron Usher's Form 4 filing for ION GEOPHYSICAL CORP.
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 13 May 2022, 16:31.
Key filing fact
Ownership activity is grounded in SEC Form 4 disclosures.
Shares, units, or other non-derivative securities reported in this filing.
Tax liability
Additional SEC filing notes
Footnote F1
These shares were not sold, but were withheld by ION Geophysical Corporation upon the vesting of restricted stock shares to satisfy tax withholding obligations.