| EU | Euro Automated Trades |
| ER | Euro Trades |
| K | Block Trade |
| LC | Late Trade Correction |
| M | Market Maker to Market Maker including through IDB |
| N | Non Protected Portfolio |
| NM | Not to Mark |
| NR | Non Risk (SEATS Based Segments only) |
| P | Protected Portfolio |
| R | Riskless Principal transaction at different Price |
| RO | Result of Option |
| RT | Risk Trade (SEATS Based Segments only) |
| ST | SEAQ Trade |
| SW | Stock Swap |
| X | Cross at the Same Price |
| PA | If reporting a protected transaction at the time that protection is applied |
| PC | Previous Day Contra |
| T | If reporting a single protected transaction |
| WN | Worked Principal Notification |
| WT | Worked Principal Trade |
| CT | Contra Trade |
| AI | Automated Input facility |
| PN | Worked Principal Portfolio Notification |
| VW | Volume Weighted Average Price |