Several U.S.-listed companies saw significant changes in their stock values during midday trading on Thursday, Sept. 17. The price movements followed a series of corporate announcements, revised financial forecasts, new analyst ratings, and media reports concerning potential business deals.
Among the companies experiencing notable increases was Generac, a generator manufacturer, whose stock rose 19%. The company announced it had secured an agreement with Amazon to supply backup power generators for its data centers. According to the announcement, initial deliveries between 2027 and 2028 are expected to total $2.4 billion. The deal also grants Amazon the right to purchase up to $340 million of Generac stock. Shares of Amazon increased 1.3%.
In the technology and semiconductor sectors, several companies saw their shares rise.
Vicor, a maker of power components, recorded a 15% increase in its share price after it granted a non-exclusive license to an artificial intelligence original equipment manufacturer for its Vertical Power Delivery modules.
SiTime shares increased by almost 10% after Morgan Stanley initiated research coverage on the company. The financial services firm issued an “overweight” recommendation and a $730 price target.
Shares of Tower Semiconductor rose nearly 9% after the Israeli company and New Photonics announced an agreement for the high-volume shipment of optical engines intended for AI infrastructure.
Workday, a cloud-based software platform, saw its shares increase 5%. The movement followed a CNBC report, which cited unidentified sources, stating that efforts to finance a bid to take the company private were continuing.
Arm Holdings shares gained 9% after CEO Rene Haas told CNBC he was confident the company could meet demand for its new data center chip.
Lucid Group’s stock added almost 9%. FactSet attributed the increase to a Bloomberg report in which the electric vehicle maker’s chief executive said restructuring work with advisors had ended.
Vital Farms, a producer of pasture-raised eggs and butter, saw its shares climb 9%. The increase came after Axios reported the company is exploring strategic alternatives, including a potential privatization deal.
In contrast, Fluence Energy shares decreased 14% after the battery storage company lowered its full-year guidance. Fluence now projects $2.4 billion in revenue for the year, revising its previous forecast of $2.9 billion to $3.1 billion. The company also adjusted its projected loss before interest, taxes, depreciation and amortization to $200 million.
