Plug Power Inc. has entered a landmark agreement to supply Walmart with up to 20 tons of liquid green hydrogen per day, marking its first supply contract in this category. The announcement led to a significant jump of over 9% in Plug Power's stock price, signaling increased investor confidence in the company's growth potential within the green hydrogen market. Despite past financial challenges, Plug Power is now poised for an anticipated 80% revenue increase this year, projecting earnings to surpass $900 million, backed by a solid cash reserve of $3.13 billion.