The small family office that is managing the wealth of the world's richest person and is helping put together the largest-ever acquisition to be carried out by one person is shrouded in secrecy.

On Monday, Musk clinched a deal to buy Twitter Inc. for $44 billion in a seminal moment for one of the world's most influential public forums.

Musk — who is also the chief executive of electric car maker Tesla Inc. and aerospace company SpaceX — revealed in a regulatory filing last week that the social media company should reach out to its family office as a point of contact regarding his proposed acquisition.