Christian Rousseaux, Immoweb chief executive, will continue in his role following the takeover and keep the remaining 20% share, alongside two other family members.

Biotechnology company Ziarco has closed the first round of its series A round with $6m.

But for entrepreneurs and potential syndicate partners to SevenVentures a combination of arrogance and uncertain ownership is toxic unless the early exit route is mapped out.

Speaking at the Open Innovation forum in Moscow, Alexey Kalinin, Rosatom project director, said: "We are in a tender process to appoint a general partner (GP) to manage the fund and hope to close in early 2013 with $250m to $300m."