5 small caps that mutual funds bought big in September 2025

Summary: In September, mutual funds boosted their bets on a mix of small-cap names, ranging from consumer discretionary to materials and financial services. Here, we highlight the top five companies that saw the most buying. The month of September saw mutual funds increase their stake across several small-cap companies, while also investing in a few new names. The buying was spread across multiple sectors, including consumer discretionary, financials, materials and industrials. Let us look at the list of the top five small-cap stocks that mutual funds invested the most in September 2025. #5 BlackBuck BlackBuck, operated by Zinka Logistics Solutions, runs a digital platform for truck operators in India. Founded in 2015 and headquartered in Bengaluru, the company connects fleet owners with shippers through its online load marketplace. Its services span fuel cards, vehicle financing (including for used trucks) and technology-led financial solutions. BlackBuck also offers digital tools for payments covering tolls and fuel. The company positions itself as a full-stack logistics enabler for India’s trucking ecosystem. Stock Rating P/E ratio 5Y revenue growth 5Y net profit growth 5Y average return on equity 5Y average return on capital employed ★★★ - -28.2% 13.8% -70.7% -30.1% #4 Clean Science and Technology Clean Science and Technology, incorporated in 2003 and headquartered in Pune, is a leading specialty chemicals manufacturer with operations in India and abroad. The company operates across three segments: performance chemicals, FMCG chemicals and pharma & agro intermediates. Its portfolio includes products that are critical inputs for FMCG, pharmaceuticals, agrochemicals and industrial applications. With a focus o