Matthias Balk / picture alliance via Getty Images Intel shares rose roughly 4% soon after the opening bell Monday, Sept. 15, 2025 Intel (INTC) shares advanced Monday when the struggling semiconductor manufacturer announced that it was lowering its outlook for full-year costs following the sale of a majority stake in its Altera programmable chip business. The company had disclosed the sale of 51% of Altera to private equity firm Silver Lake for approximately $3.3 billion in April, and the deal closed last ...