Not really that easily? Generally, only the legal agent for the private company will know and the direct hires of the board i.e. the CEO/CTO/whoever they name up top. Sometimes board of directors can get named in court records but with the public records redacted. But outside of that? Not even the IRS knows unless the directors get compensation.
MI6 would have to commit a few physical in person crimes to get any details out of any reasonably well run operation.
