The Outer Planet's Alliance
The OPA is a large trade union organized by interests outside the Inner Planets to better negotiate for Mars and Venus monopolized goods. A transporting company from the Belt or further out need not be a member of the OPA to do business but it is considered socially ill-advised not to be. Businesses, and devoted members, display their symbol (a red circle broken at the top by a wedge) discretely but with an almost patriotic pride. Non-franchise businesses that do not bare the symbol are sometimes shunned.
Their growing power has inspired some Martian business to attempt to unionize… unsuccessfully. In recent years, fringe factions of the OPA have committed acts of piracy and even terrorism “in opposition to Inner Planets oppression”. MarSec has made it known, if the ISSP does not deal with this, they will.