The company announced the milestone following a strong end to the 2017/2018 tax year.
Investment director John Davies said: “The recent growth capital investments transacted by Seneca demonstrate the wide range of businesses we are able to support, as well as the flexible approach we take into these investments. "Our investment expertise is of particular relevance in view of recent changes in VCT legislation, which has restricted the ability of VCTs to finance management buy-outs and acquisitions."