The article discusses the top hydrogen stocks to watch according to MarketBeat's stock screener tool. Companies like Exxon Mobil, Linde, Shell, BP, Air Products and Chemicals, CF Industries, and Plug Power are highlighted for their involvement in the production, distribution, and utilization of hydrogen as a clean energy source. These companies have seen significant trading volume in the past days, indicating investor interest in the hydrogen sector. The article provides detailed information on each company's stock performance, including trading prices, volume, market cap, and financial ratios such as PE ratio, PEG ratio, and debt-to-equity ratio. Exxon Mobil, for instance, engages in the exploration and production of crude oil and natural gas, while Linde operates as an industrial gas company offering various gases including hydrogen. Shell, BP, Air Products and Chemicals, and CF Industries are also discussed in terms of their operations, market positions, and stock performance. Shell, for example, operates as an energy and petrochemical company across various regions, while BP is involved in providing carbon products and services, including hydrogen production. Air Products and Chemicals specializes in providing atmospheric and process gases, including hydrogen, to a wide range of industries globally. The article highlights the importance of monitoring these hydrogen stocks for potential investment opportunities in the clean energy sector, as companies strive to develop hydrogen fuel technologies and infrastructure for a hydrogen-based energy economy. Overall, the sentiment towards hydrogen in the article is positive, positioning these companies as key players in the evolving clean energy landscape.