The Microcosm first round offer was 10% for £50,000.
This second round is for a further 5% (for £100k), which would - without pre-emption rights being taken up - dilute all shareholders.
The total number of shares in the entire company increases so that shares totalling 5% of the company can be issued to the new investors.
So the stake owned by a first round investor reduces in terms of the overall proportion of shares in the entire company. But only by a very small amount, because the dilution effects all shareholders.
Consequently, in order to keep at the same % ownership as after the first round, you need only invest a small proportion of your initial investment.
Initial investors will have 48 hours to use their pre-emption rights. Once that period has elapsed, the offer is open to everyone.
Thanks Frank - exactly what I was after. The example is good too.