Soluna Holdings (NASDAQ: SLNH) stock has leapt roughly 116% over the past week and 330% over the last month, driven by renewed investor interest in its green data center model and recent financing updates. However, a September 23 prospectus supplement filing to update its at the market (ATM) offering program could hurt the stock’s recent surge. The filing authorizes the company to sell up to $87.65 million of common shares through H.C. Wainwright and notes that Soluna has already sold 13,680,483 shares u ...