The size of the investment has not been disclosed but it's reported that the deal values Comstock at "a substantial premium" over its first round valuation.
This fourth round brings the total raised by the company to E389m.
Allianz Capital Partners, Round1’s chief executive and some private individuals have invested in this second round of financing.
The new fund, Earlybird III, has already invested in 14 companies in Europe and the US.
Half the total raised was invested by 13 multinational corporations and the rest came from institutional investors.
The technology investor has invested $4.9m in Kevab, a start-up developing 3G infrastructure products.
The technology provider will take over TessComm, one of T-Venture’s portfolio companies, as part of the deal.
Softbank UK Ventures has invested in Venation a company which has come out of BT’s technology incubator Brightstar.
Dublin-based Aran Technologies will use the financing to globalise its sales division and develop its software intellectual property.
The fund, which had an original target of £50m-£75m, will make investments in UK-based start-up and early-stage technology businesses.
The latest addition to Royal Bank of Scotland's private equity business will invest in enterprise application and communication software, internet infrastructure and hardware infrastructure.
Bay Partners X has secured $475m with significant investments from European investors.
40 per cent of the capital raised comes from Nordic investors, another 30 per cent from the rest of Europe.
40 per cent of the capital raised comes from Nordic investors, another 30 per cent from the rest of Europe.
The latest Initiative Europe focus report says that private capital is increasingly being raised for investment in European technology companies despite turbulence in the world’s public markets.