Investors often look for opportunities to buy quality shares at bargain prices, especially during times when the broader market may not be focused on specific stocks. A potentially lucrative option that has surfaced is SDI Group, a company listed on the London Stock Exchange (LSE:SDI). This firm comprises various industrial equipment companies operating in sectors characterized by high barriers to entry and minimal competition.
SDI Group’s business model centers around the acquisition of smaller firms, where it plays an active role in fostering growth through avenues such as product development, entry into new markets, and scaling production capabilities. This type of model has been successfully employed by companies like Halma and Diploma, generating substantial long-term returns for their investors. While risks are inherent in any acquisition strategy—particularly the danger of overpaying for a business—SDI Group appears advantageously positioned to mitigate these risks due to its relatively modest market capitalization of £77 million. This size often allows SDI to consider businesses that are overlooked by larger competitors.
Despite its promising business approach, SDI Group has faced challenges in the past few years. Notably, sales growth significantly declined, even dipping during the firm’s fiscal year 2024, primarily due to a post-pandemic downturn affecting the healthcare market, which is one of its key areas. For a company that positions itself as a growth stock, a reduction in sales raises significant concerns regarding its future potential. Such volatility also underscores the cyclical nature of the industrial markets in which SDI operates.
However, there are signs of recovery. In its latest financial update, SDI reported a 10% revenue growth, with 3% attributed to existing businesses. The company projects that this growth rate could rise to between 5% and 8% in the long term, providing a glimmer of hope for investors seeking stability in the sector.
When assessed in relation to its competitors, SDI Group’s valuation appears particularly attractive. Trading at a price-to-sales (P/S) multiple of 1.2, it significantly lags behind peers such as Halma (5.6) and Diploma (4.8). Although SDI’s organic growth forecasts are conservatively lower, the disparity in valuations suggests an overlooked opportunity in the market.
This combination of potential for recovery and attractive valuation metrics warrants further investigation by investors. While volatility is an inherent characteristic of smaller companies like SDI, such fluctuations can also yield opportunities for significant growth. Therefore, SDI Group emerged as a stock worth monitoring closely, joining a list of other undervalued companies that analysts may not yet have fully appreciated.

