River UK Micro Cap Limited (RMMC.L) is a closed-end investment trust focused on generating long-term capital growth through investments in a diversified portfolio of micro-cap companies listed on the London Stock Exchange and AIM. The company offers investors exposure to small UK equities with market capitalizations typically below GBP 250 million; its portfolio emphasizes undervalued micro-cap stocks across sectors such as industrials, consumer discretionary, financials, and technology. River UK Micro Cap Limited manages a concentrated selection of 20-40 holdings, selected based on fundamental analysis, growth potential, and risk-adjusted returns, with active portfolio management to navigate market volatility. Founded in 2012 and headquartered in London, United Kingdom, the company operates primarily in the UK equity markets, targeting institutional and retail investors seeking high-conviction small-cap opportunities. In recent developments, the fund has undergone a strategic rebranding and management transition under River and Mercantile Group, enhancing its focus on micro-cap specialist strategies amid broader UK small-cap market recovery efforts as of late 2025.