Key TakeawaysGenerac soared 33% following announcement of massive backup-power agreement with Amazon worth up to $8 billion for data center facilitiesNebius climbed 8% on price increase announcement, boosting competitors Iren and CoreWeaveFluence Energy plummeted 16% following sharp reduction in annual revenue forecast from $3.1 billion to $2.4 billionMajor gainers on Wednesday included GE Vernova, SpaceX, and AMD among mega-cap stocksLennar declined more than 2% after reducing home delivery projections for the second time due to interest rate challengesGenerac Holdings emerged as Thursday’s top performer, with shares skyrocketing 33% following disclosure of a major long-term partnership with Amazon to supply backup-power generation systems for their data center infrastructure.The arrangement encompasses $2.4 billion in initial generator shipments scheduled for 2027 and 2028. Combined payments to Generac and its international partners could total up to $8 billion, based on securities filings.Under the terms of the partnership, Generac granted an Amazon subsidiary warrants to acquire up to 1.69 million shares with an exercise price of approximately $200.93 per share.Neocloud Providers RallyNebius Group shares climbed 8% during premarket hours following the neocloud provider’s announcement of price increases. The decision provided a boost to competitor stocks including Iren and CoreWeave.Vicor Corporation advanced 10% after revealing a licensing agreement with an undisclosed OEM for its Vertical Power Delivery technology designed for advanced AI processors. Specific financial details of the arrangement were not made public.Among decliners, Fluence Energy tumbled 16% after dramatically reducing its annual revenue projection to $2.4 billion, down from previous expectations of $2.9 billion to $3.1 billion. The firm also revised its adjusted EBITDA outlook to an approximately $200 million loss for the fiscal year, versus prior estimates of roughly a $10 million loss.Fluence attributed the shortfall to supply chain complications and setbacks in scaling up contract manufacturing facilities in Houston. Management emphasized that customer demand remains robust and that measures have been implemented to boost daily production capacity.Viant Technology declined 10% following announcement of a public offering involving 8.5 million Class A shares from an existing stockholder. The company indicated it would not receive any funds from the standard offering.Wednesday’s Top Performers and DeclinersWednesday witnessed significant volatility across various market capitalizations. GE Vernova increased nearly 6%, while SpaceX advanced over 5% and AMD rose 4%.Arista Networks posted a 3% gain, while Coherent and Credo Technology each recorded approximately 7% increases.Conversely, Exxon Mobil declined 2.7% and Chevron retreated 2.2%. J.B. Hunt Transportation suffered a 13% drop, representing one of the most significant losses among major companies.Within smaller-cap stocks, LuxExperience surged over 25% on stronger-than-expected revenue despite an earnings miss. Gloo Holdings rallied nearly 25%.Lennar shares dropped more than 2% on Thursday following the homebuilder’s second reduction of its annual home delivery forecast, attributing the adjustment to interest rate pressures and deteriorating housing market dynamics.Nike shares increased 1.5% on elevated trading volume, just one session after reaching their lowest closing price in over a decade. The athletic apparel giant is scheduled to announce quarterly results on October 1.Broader markets moved slightly higher in premarket activity as participants digested a 25 basis point interest rate increase from the Federal Reserve alongside remarks from Fed Chair Kevin Warsh indicating a persistent hawkish stance on inflation control.The post Thursday’s Stock Highlights: Generac (GNRC), Nebius, and Fluence Energy Make Major Moves appeared first on Blockonomi.