| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| OII | Sr. V.P. and CAO | Feb 18, 2019 | Option Exercise | $16.65 | 1,502 | 25,008 | 42,163 | Feb 19, 2019, 07:20 PM |
| OII | Sr. V.P. and CAO | Feb 19, 2018 | Option Exercise | $18.45 | 2,864 | 52,841 | 43,665 | Feb 21, 2018, 04:08 PM |
| OII | Sr. V.P. and CAO | Sep 21, 2017 | Sale | $25.76 | 2,000 | 51,520 | 46,529 | Sep 21, 2017, 04:50 PM |
| OII | SVP and CFO | Dec 18, 2012 | Sale | $53.50 | 1,000 | 53,500 | 33,868 | Dec 18, 2012, 04:14 PM |
| OII | VP, Chief Accounting Officer | Feb 22, 2011 | Option Exercise | $81.93 | 832 | 68,166 | 11,168 | Feb 24, 2011, 10:23 AM |
| Symbol | Relationship | Date | Transaction | Value($) |
| OII | Sr. V.P. and CAO | Feb 18, 2019 | Option Exercise | 25,008 |
| OII | Sr. V.P. and CAO | Feb 19, 2018 | Option Exercise | 52,841 |
| OII | Sr. V.P. and CAO | Sep 21, 2017 | Sale | 51,520 |
| OII | SVP and CFO | Dec 18, 2012 | Sale | 53,500 |
| OII | VP, Chief Accounting Officer | Feb 22, 2011 | Option Exercise | 68,166 |